B.Sc.(H) Chemistry-3Rd Semester
Total Page:16
File Type:pdf, Size:1020Kb

Load more
Recommended publications
-
The Radiochemistry of Beryllium
National Academy of Sciences National Research Council I NUCLEAR SCIENCE SERIES The Radiochemistry ·of Beryllium COMMITTEE ON NUCLEAR SCIENCE L. F. CURTISS, Chairman ROBLEY D. EVANS, Vice Chairman National Bureau of Standards MassaChusetts Institute of Technol0gy J. A. DeJUREN, Secretary ./Westinghouse Electric Corporation H.J. CURTIS G. G. MANOV Brookhaven National' LaboratOry Tracerlab, Inc. SAMUEL EPSTEIN W. WAYNE MEINKE CalUornia Institute of Technology University of Michigan HERBERT GOLDSTEIN A.H. SNELL Nuclear Development Corporation of , oak Ridge National Laboratory America E. A. UEHLING H.J. GOMBERG University of Washington University of Michigan D. M. VAN PATTER E.D.KLEMA Bartol Research Foundation Northwestern University ROBERT L. PLATZMAN Argonne National Laboratory LIAISON MEMBERS PAUL C .. AEBERSOLD W.D.URRY Atomic Energy Commission U. S. Air Force J. HOW ARD McMILLEN WILLIAM E. WRIGHT National Science Foundation Office of Naval Research SUBCOMMITTEE ON RADIOCHEMISTRY W. WAYNE MEINKE, Chairman HAROLD KIRBY University of Michigan Mound Laboratory GREGORY R. CHOPPIN GEORGE LEDDICOTTE Florida State University. Oak Ridge National Laboratory GEORGE A. COW AN JULIAN NIELSEN Los Alamos Scientific Laboratory Hanford Laboratories ARTHUR W. FAIRHALL ELLIS P. STEINBERG University of Washington Argonne National Laboratory JEROME HUDIS PETER C. STEVENSON Brookhaven National Laboratory University of California (Livermore) EARL HYDE LEO YAFFE University of CalUornia (Berkeley) McGill University CONSULTANTS NATHAN BALLOU WILLIAM MARLOW Naval Radiological Defense Laboratory N atlonal Bureau of Standards JAMESDeVOE University of Michigan CHF.MISTRY-RADIATION AND RADK>CHEMIST The Radiochemistry of Beryllium By A. W. FAIRHALL. Department of Chemistry University of Washington Seattle, Washington May 1960 ' Subcommittee on Radiochemistry National Academy of Sciences - National Research Council Printed in USA. -
Ester Resveratrol Analogues, Chromium Trioxide Oxidation of Terpenes, and Synthesis of Mimics of (-)-Englerin A
Brigham Young University BYU ScholarsArchive Theses and Dissertations 2014-08-01 Synthesis of 4'-Ester Resveratrol Analogues, Chromium Trioxide Oxidation of Terpenes, and Synthesis of Mimics of (-)-Englerin A Mark Jeffrey Acerson Brigham Young University - Provo Follow this and additional works at: https://scholarsarchive.byu.edu/etd Part of the Biochemistry Commons, and the Chemistry Commons BYU ScholarsArchive Citation Acerson, Mark Jeffrey, "Synthesis of 4'-Ester Resveratrol Analogues, Chromium Trioxide Oxidation of Terpenes, and Synthesis of Mimics of (-)-Englerin A" (2014). Theses and Dissertations. 5458. https://scholarsarchive.byu.edu/etd/5458 This Dissertation is brought to you for free and open access by BYU ScholarsArchive. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. Synthesis of 4’-Ester Resveratrol Analogues, Chromium Trioxide Oxidation of Terpenes, and Synthesis of Mimics of (–)-Englerin A Mark Jeffrey Acerson A dissertation submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Doctor of Philosophy Merritt B. Andrus, Chair Steven L. Castle Matt A. Peterson Joshua L. Price Richard K. Watt Department of Chemistry and Biochemistry Brigham Young University August 2014 Copyright © 2014 Mark Jeffrey Acerson All Rights Reserved ABSTRACT Synthesis of 4’-Ester Resveratrol Analogues, Chromium Trioxide Oxidation of Terpenes, and Synthesis of Mimics of (–)-Englerin A Mark Jeffrey Acerson Department of Chemistry and Biochemistry, BYU Doctor of Philosophy 4’-ester analogues of resveratrol were synthesized using reaction conditions developed to produce mono-ester products in the presence of two other unprotected phenols. -
Dehydrogenation of Ethanol to Acetaldehyde Over Different Metals Supported on Carbon Catalysts
catalysts Article Dehydrogenation of Ethanol to Acetaldehyde over Different Metals Supported on Carbon Catalysts Jeerati Ob-eye , Piyasan Praserthdam and Bunjerd Jongsomjit * Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand; [email protected] (J.O.-e.); [email protected] (P.P.) * Correspondence: [email protected]; Tel.: +66-2-218-6874 Received: 29 November 2018; Accepted: 27 December 2018; Published: 9 January 2019 Abstract: Recently, the interest in ethanol production from renewable natural sources in Thailand has been receiving much attention as an alternative form of energy. The low-cost accessibility of ethanol has been seen as an interesting topic, leading to the extensive study of the formation of distinct chemicals, such as ethylene, diethyl ether, acetaldehyde, and ethyl acetate, starting from ethanol as a raw material. In this paper, ethanol dehydrogenation to acetaldehyde in a one-step reaction was investigated by using commercial activated carbon with four different metal-doped catalysts. The reaction was conducted in a packed-bed micro-tubular reactor under a temperature range of 250–400 ◦C. The best results were found by using the copper doped on an activated carbon catalyst. Under this specified condition, ethanol conversion of 65.3% with acetaldehyde selectivity of 96.3% at 350 ◦C was achieved. This was probably due to the optimal acidity of copper doped on the activated carbon catalyst, as proven by the temperature-programmed desorption of ammonia (NH3-TPD). In addition, the other three catalyst samples (activated carbon, ceria, and cobalt doped on activated carbon) also favored high selectivity to acetaldehyde (>90%). -
ACETIC ACID and ACETIC ANHYDRIDE (November 1994)
Abstract Process Economics Program Report 37B ACETIC ACID AND ACETIC ANHYDRIDE (November 1994) This Report presents preliminary process designs and estimated economics for the manufacture of acetic acid and acetic anhydride by carbonylation technology. The three processes evaluated in this report include Monsanto’s low pressure carbonylation of methanol process (BP Chemical acquired licensing rights to this process in 1985), Eastman’s process for carbonylation of methyl acetate to produce acetic anhydride (methanol added to the reaction mixture results in the coproduction of acetic acid in this process), and a process based on BP Chemical patents that coproduces acetic acid and acetic anhydride via carbonylation of methyl acetate in the presence of water. Both the Eastman and BP Chemical processes are back– integrated into the manufacture of the methyl acetate feedstock from methanol and acetic acid. We have included a discussion of other commercialized acetic acid and acetic anhydride processes as well as potential new processes. A list of the world’s acetic acid and acetic anhydride producers along with their estimated plant capacities and a description of the major acetic acid and acetic anhydride markets are also included in this Report. This Report will be useful to producers of acetic acid and acetic anhydride, as well as to producers of methanol and downstream products such as vinyl acetate monomer. PEP’93 MKG CONTENTS 1 INTRODUCTION 1-1 2 SUMMARY 2-1 GENERAL ASPECTS 2-1 ECONOMIC ASPECTS 2-1 TECHNICAL ASPECTS 2-3 Low Pressure Carbonylation -
Experiment #4 the Preparation of Ferrocene & Acetylferrocenes1
Experiment #4: The Preparation of Ferrocene & Acetylferrocene MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Chemistry 5.311 Introductory Chemical Experimentation EXPERIMENT #4 THE PREPARATION OF FERROCENE & ACETYLFERROCENES1 I. Purpose The principal aims of this experiment are to provide background information about and experience in: S the synthesis and electronic structure of ferrocene (1), ( -C5H5)2Fe [bis(pentahaptocyclopentadienyl) iron]2 S the synthesis of an ionic liquid, as environment for the acetylation of ferrocene S the use of inert atmospheres (including glove box techniques) S recrystallization or sublimation S the use of GC/MS and thin-layer chromatography as analytical tools and column chromatography as a purification technique • the concepts of Green Chemistry such as Atom Economy3 and alternative non-polluting solvents Ferrocene is a historically important molecule. The initial recognition of the structure of 4 C10H10Fe in 1951 spawned a vast area of chemistry, viz., transition metal organometallic chemistry. This field is still developing and has produced a huge number of compounds in which saturated, unsaturated, and aromatic organic fragments are bonded directly to metals. All carbon atoms in the two cyclopentadienyl rings are equally bonded to the central ion by electrons in the rings. The sandwich structure proposed by Wilkinson and Fischer5,6 (Nobel prize in 1973) in early 1 Mircea D. Gheorghiu designed the experiment to include the acetylation of ferrocene in ionic liquid. 2 The word hapto means in Greek to fasten. Pentahapto therefore, is to be taken as “fastened in five places.” The greek letter followed by a superscript indicates how many atoms of the ligand are attached to the metal. -
Acetic Anhydride
ACETIC ANHYDRIDE Method number: 102 Matrix: Air Target concentration: 5 ppm (20 mg/m3) OSHA PEL: 5 ppm (20 mg/m3) TWA ACGIH TLV: 5 ppm (20 mg/m3) ceiling Procedure: Samples are collected open face on glass fiber filters coated with veratrylamine and di-n-octyl phthalate. Samples are extracted with 50/50 (v/v) 2-propanol/toluene and analyzed by GC using a nitrogen- phosphorus detector (NPD). Recommended air volume and sampling rate: 7.5 L at 0.5 L/min ceiling 7.5 L at 0.05 L/min TWA Reliable quantitation limit: 0.094 ppm (0.39 mg/m3) Standard error of estimate at the target concentration: 6.4% Special caution: Ketene and acetyl chloride produce the same derivative as acetic anhydride. Coated filters should be used within a month of preparation. Status of method: Evaluated method. This method has been subjected to the established evaluation procedures of the Organic Methods Evaluation Branch. Date: October 1993 Chemist: Yihlin Chan Organic Methods Evaluation Branch OSHA Salt Lake Technical Center Salt Lake City, UT 84165-0200 1. General Discussion 1.1 Background 1.1.1 History In OSHA Method 82, acetic anhydride is collected on a glass fiber filter impregnated with 1-(2-pyridyl)piperazine, which reacts with the anhydride to form a derivative (Ref. 5.1). Attempts at using 1-(2-pyridyl)piperazine for the derivatization of maleic, phthalic, and trimellitic anhydrides failed, however, because the resulting derivatives of these anhydrides were found to be unstable. These anhydrides were derivatized with veratrylamine instead (Refs. 5.2-5.4). -
Safety Data Sheet
SAFETY DATA SHEET Section 1. Identification Product name Acetic Anhydride/ Acetic Acid 60/40 Blend SDS # 0000001991 Historic SDS #: 4406 Code 0000001991 Relevant identified uses of the substance or mixture and uses advised against Product use Manufacture of chemicals. For specific application advice see appropriate Technical Data Sheet or consult our company representative. Supplier BP Amoco Chemical Company 150 West Warrenville Road Naperville, Illinois 60563-8460 USA EMERGENCY HEALTH 1 (800) 447-8735 INFORMATION: Outside the US: +1 703-527-3887 (CHEMTREC) EMERGENCY SPILL 1 (800) 424-9300 CHEMTREC (USA) INFORMATION: Section 2. Hazards identification OSHA/HCS status This material is considered hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200). Classification of the FLAMMABLE LIQUIDS - Category 3 substance or mixture ACUTE TOXICITY (oral) - Category 4 ACUTE TOXICITY (inhalation) - Category 2 SKIN CORROSION - Category 1A GHS label elements Hazard pictograms Signal word Danger Hazard statements Flammable liquid and vapor. Fatal if inhaled. Harmful if swallowed. Causes severe skin burns and eye damage. Precautionary statements Prevention Do not breathe dust/fume/gas/mist/vapors/spray. Wear respiratory protection. Wear protective gloves/clothing and eye/face protection. Response IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water [or shower]. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Product name Acetic Anhydride/ Acetic Acid 60/40 Blend Product code 0000001991 Page: 1/13 Version 4 Date of issue 01/22/2020. -
Study on Gas-Phase Mechanism of Chloroacetic Acid Synthesis by Catalysis and Chlorination of Acetic Acid
Asian Journal of Chemistry; Vol. 26, No. 2 (2014), 475-480 http://dx.doi.org/10.14233/ajchem.2014.15484 Study on Gas-Phase Mechanism of Chloroacetic Acid Synthesis by Catalysis and Chlorination of Acetic Acid * JIAN-WEI XUE , JIAN-PENG ZHANG, BO WU, FU-XIANG LI and ZHI-PING LV Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, P.R. China *Corresponding author: Fax: +86 351 6111178; Tel: +86 351 60105503; E-mail: [email protected] Received: 14 March 2013; Accepted: 17 May 2013; Published online: 15 January 2014; AJC-14570 The process of acetic acid catalysis and chlorination for synthesizing chloroacetic acid can exist in not only gas phase but also liquid phase. In this paper, the gas-phase reaction mechanism of the synthesis of chloroacetic acid was studied. Due to the high concentration of acetic acid and the better reaction mass transfer in the liquid-phase reaction, the generation amount of the dichloroacetic acid was higher than that in the gas-phase reaction. Under the solution distillation, the concentration of acetyl chloride, whose boiling point is very low, was very high in the gas phase, sometimes even up to 99 %, which would cause the acetyl chloride to escape rapidly with the hydrogen chloride exhaust, so that the reaction slowed down. Therefore, series reactions occured easily in the gas-phase reaction causing the amount of the dichloroacetic acid to increase. Keywords: Gas phase, Catalysis, Chlorination, Chloroacetic acid, Acetic acid. INTRODUCTION Martikainen et al.3 summed up the reaction mechanism that was consistent with a mechanism found by Sioli according Chloroacetic acid is not only a fine chemical product but to the system condition experiment and systematic theoretical also an important intermediate in organic synthesis. -
Heterogeneous Catalyst for the Production of Ethylidene Diacetate from Acetic Anhydride
^ ^ ^ ^ I ^ ^ ^ ^ ^ ^ II ^ ^ ^ II ^ II ^ ^ ^ ^ ^ ^ ^ ^ ^ I ^ European Patent Office Office europeen des brevets EP 0 808 820 A1 EUROPEAN PATENT APPLICATION (43) Date of publication: (51) |nt CI C07C 67/29, C07C 69/16, 26.11.1997 Bulletin 1997/48 B01J31/20 (21) Application number: 97303368.1 (22) Date of filing: 16.05.1997 (84) Designated Contracting States: • Waller, Francis Joseph DE DK ES FR GB IT NL SE Allentown, PA 18103-9670 (US) (30) Priority: 21.05.1996 US 651096 (74) Representative: Burford, Anthony Frederick et al W.H. Beck, Greener & Co. (71) Applicant: AIR PRODUCTS AND CHEMICALS, 7 Stone Buildings INC. Lincoln's Inn Allentown, PA 18195-1501 (US) London WC2A 3SZ (GB) (72) Inventors: • Ramprasad, Dorai Allentown, PA 18104 (US) (54) Heterogeneous catalyst for the production of ethylidene diacetate from acetic anhydride (57) Ethylidene diacetate is produced by the reac- nized heteroatoms, some of which heteroatoms are ion- tion of acetic anhydride, acetic acid, hydrogen and car- ically bonded to anionic Group VIII metal complexes, the bon monoxide at elevated temperatures and pressures remainder of the heteroatoms being bonded to iodide, in the presence of an alkyl halide and a heterogeneous, In contrast to prior art processes, no accelerator (pro- bifunctional catalyst that is stable to hydrogenation and moter) is necessary to achieve the catalytic reaction and comprises an insoluble polymer having pendant quater- the products are easily separated from the catalyst by filtration. < O CM 00 00 o CO o a. LU Printed by Jouve, 75001 PARIS (FR) EP 0 808 820 A1 Description This invention relates to a process for producing ethylidene diacetate by hydrogenating acetic anhydride in the presence of a heterogeneous, bifunctional catalyst that is stable to hydrogenation. -
Chemical Compatibility Storage Group
CHEMICAL SEGREGATION Chemicals are to be segregated into 11 different categories depending on the compatibility of that chemical with other chemicals The Storage Groups are as follows: Group A – Compatible Organic Acids Group B – Compatible Pyrophoric & Water Reactive Materials Group C – Compatible Inorganic Bases Group D – Compatible Organic Acids Group E – Compatible Oxidizers including Peroxides Group F– Compatible Inorganic Acids not including Oxidizers or Combustible Group G – Not Intrinsically Reactive or Flammable or Combustible Group J* – Poison Compressed Gases Group K* – Compatible Explosive or other highly Unstable Material Group L – Non-Reactive Flammable and Combustible, including solvents Group X* – Incompatible with ALL other storage groups The following is a list of chemicals and their compatibility storage codes. This is not a complete list of chemicals, but is provided to give examples of each storage group: Storage Group A 94‐75‐7 2,4‐D (2,4‐Dichlorophenoxyacetic acid) 94‐82‐6 2,4‐DB 609-99-4 3,5-Dinitrosalicylic acid 64‐19‐7 Acetic acid (Flammable liquid @ 102°F avoid alcohols, Amines, ox agents see SDS) 631-61-8 Acetic acid, Ammonium salt (Ammonium acetate) 108-24-7 Acetic anhydride (Flammable liquid @102°F avoid alcohols see SDS) 79‐10‐7 Acrylic acid Peroxide Former 65‐85‐0 Benzoic acid 98‐07‐7 Benzotrichloride 98‐88‐4 Benzoyl chloride 107-92-6 Butyric Acid 115‐28‐6 Chlorendic acid 79‐11‐8 Chloroacetic acid 627‐11‐2 Chloroethyl chloroformate 77‐92‐9 Citric acid 5949-29-1 Citric acid monohydrate 57-00-1 Creatine 20624-25-3 -
Exploring the Catalytic Activity of Lewis-Acidic Uranyl Complexes in the Nucleophilic Acyl Substitution of Acid Anhydrides
RSC Advances View Article Online PAPER View Journal | View Issue Exploring the catalytic activity of Lewis-acidic uranyl complexes in the nucleophilic acyl Cite this: RSC Adv.,2017,7, 12201 substitution of acid anhydrides† Koichiro Takao* and Shin Akashi The catalytic activities of several uranyl complexes, such as N,N0-disalicylidene-o- phenelyenediaminato(ethanol)dioxouranium(VI) (UO2(salophen)EtOH), bis(dibenzoylmethanato)(ethanol) 2+ dioxouranium(VI) (UO2(dbm)2EtOH), pentakis(N,N-dimethylformamide)dioxouranium(VI) ([UO2(DMF)5] ), 2+ and tetrakis(triphenylphosphine oxide)dioxouranium(VI) ([UO2(OPPh3)4] ), were examined in the 2+ nucleophilic acyl substitution of acid anhydrides. Among them, [UO2(OPPh3)4] was the most efficient to give ethyl acetate and acetic acid from acetic anhydride (Ac2O) and ethanol, and was resistant towards decomposition during the catalytic reaction. Several nucleophiles were also subjected to the Received 5th December 2016 catalytic acylation reaction using acetic and pivalic anhydride. Kinetic and spectroscopic studies Accepted 8th February 2017 2+ 2+ Creative Commons Attribution 3.0 Unported Licence. suggested that [UO2(OPPh3)4] interacts with Ac2O to form [UO2(Ac2O)(OPPh3)3] . Interaction of this DOI: 10.1039/c6ra27796a actual catalyst with additional Ac2O determines the rate of the overall nucleophilic acyl substitution rsc.li/rsc-advances reaction. Introduction anaerobic conditions because of the low stability of these (pre) catalysts towards oxygen and moisture. Although uranium is undoubtedly the most important element Using the Lewis acidity of uranium should be another in nuclear engineering, the less abundant 235U isotope is alternative for exploring its catalytic activity. Particularly, the 2+ 2+ This article is licensed under a ] ] primarily employed in the practical utilization of atomic power. -
INCOMPATIBLE CHEMICALS Up-Dated October 2011
INCOMPATIBLE CHEMICALS Up-dated October 2011 Sources Accident Prevention Manual for Industrial Operations, 6th ed., National Safety Council, Fire Protection Guide on Hazardous Materials, 6th ed., National Fire Protection Association; 49CFR173; recent laboratory inspections. Incompatible materials should not be stored together where they can be inadvertently mixed or where a spill or leak can cause danger. General guidelines are: 1. Oxygen and fuels must not be stored together. 2. Water reactive materials are not to be stored with flammables (except where a flammable is used to blanket a material such as sodium and then at least practical quantity), or in an area where they could become wet (under a sink, sprinkler head, shower, etc.) 3. Strong acids and bases are not to be stored together. 4. Materials which can produce poisonous gases must not be stored with products which accelerate the release of the gas. (Examples: cyanogens are not to be stored with an acid, or cleaning products containing chlorine are not to be stored with ammonia.) 5. Explosives (picric acid, etc.) are not to be stored with fuels. 6. Incompatible acids must not be stored together. (Examples: perchloric acid is not to be stored with a reducing agent such as sulfuric acid, as upon mixing, this could produce a shock sensitive explosive; nitric acid and acetic acid, a potential explosive mixture, must not be stored together.) Specific examples of incompatible items likely to be found in laboratories are: Chemical Store Away From or Out of Contact With Acetic Acid Chromic acid, nitric acid, hydroxyl compounds, ethylene glycol, perchloric acid, peroxides and permanganates.