Synthesis and Characterization of Amorphous Cycloaliphatic Copolyesters with Novel Structures and Architectures
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Terephthalic Acid and Dimethyl Terephthalate Supplement B
Report No. 9B TEREPHTHALIC ACID AND DIMETHYL TEREPHTHALATE SUPPLEMENT B by LLOYD M. ELKIN With contributions by Shigeyoshi Takaoka Kohsuke Ohta September 1970 e A private report by the PROCESS ECONOMICS PROGRAM STANFORD RESEARCH INSTITUTE MENLO PARK, CALIFORNIA e I CONTENTS 1 INTRODUCTION . 1 2 SUMMARY........................... 3 3 INDUSTRY STATUS . 13 4 CHEMISTRY......................... 23 Terephthalic Acid from p-Xylene by Liquid Phase Oxidation in the Presence of Large Amounts of Catalyst . 23 Bis(2-hydroxyethyl) Terephthalate from Ethylene Oxide and Terephthalic Acid . , . , . 25 Ammoxidation of p-Xylene . 26 dlycolysis of Terephthalonitrile . 28 Terephthalic Acid by Bromine-Promoted Catalytic Oxidation of p-Xylene ., . 30 Terephthalic Acid by Catalytic Oxidation of p-Xylene in the Presence of Methyl Ethyl Ketone Activator . 32 Terephthalic Acid by Nitric Acid Oxidation of p-Xylene . 32 Terephthalic Acid from Phthalic Anhydride . 33 5 REVIEW OF PATENTS . , . 37 Terephthalic Acid by Bromine-Promoted Catalytic Air Oxidation of p-Xylene . , . 37 Terephthalic Acid by Catalytic Oxidation of p-Xylene in the Presence of Activators . 38 Dimethyl Terephthalate from p-Xylene by Successive Oxidations and Esterifications . , . 39 Terephthalic Acid by Nitric Acid Oxidation of p-Xylene . 40 Terephthalic Acid from p-Xylene by Liquid Phase Oxidation in the Presence of Large Amounts of Catalyst . , . 40 Terephthalic Acid from p-Xylene by Other Oxidation Processes . , . , 42 Terephthalic Acid from Phthalic Anhydride or Benzoic Acid . 42 Terephthalonitrile, Preparation and Purification . 42 Dimethyl Terephthalate by Esterification of Terephthalic Acid.......................... 43 Bis(2-hydroxyethyl) Terephthalate from Terephthalic Acid and Ethylene Oxide or from Terephthalonitrile . 44 Purification of Terephthalic Acid . 44 Miscellaneous . 45 CONTENTS 6 TEREPHTHALIC ACID FROM p-XYLENE BY LIQUID PHASE OXIDATION IN THE PRESENCE OF LARGE AMOUNTS OF CATALYST , , . -
Synthesis of Polyesters by the Reaction of Dicarboxylic Acids with Alkyl Dihalides Using the DBU Method
Polymer Journal, Vol. 22, No. 12, pp 1043-1050 (1990) Synthesis of Polyesters by the Reaction of Dicarboxylic Acids with Alkyl Dihalides Using the DBU Method Tadatomi NISHIKUBO* and Kazuhiro OZAKI Department of Applied Chemistry, Faculty of Engineering, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221, Japan (Received July 6, 1990) ABSTRACT: Some polyesters with moderate viscosity were synthesized by reactions of dicarboxylic acids with alkyl dihalides using 1,8-diazabicyclo-[5.4.0]-7-undecene (DBU) in aprotic polar solvents such as dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) under relatively mild conditions. The viscosity and yield of the resulting polymer increased with increasing monomer concentration. Although polymers with relatively high viscosity were obtained when the reaction with p-xylylene dichloride was carried out at 70°C in DMSO, the viscosity of the resulting polymers decreased with increasing reaction temperature when the reaction with m-xylylene dibromide was carried out in DMSO. KEY WORDS Polyester Synthesis/ Dicarboxylic Acids/ Alkyl Dihalides / DBU Method / Mild Reaction Condition / Although poly(ethylene terephthalate) is favorable method for the synthesis of polyes synthesized industrially by transesterification ters because the preparation and purification between dimethyl terephthalate and ethylene of the activated. dicarboxylic acids is un glycol at relatively high temperatures using necessary. certain catalysts, many polyesters are usually Some polyesters have also been prepared8 prepared by the polycondensation of dicarbox by reactions between alkali metal salts of ylic-acid chlorides with difunctional alcohols dicarboxylic-acids and aliphatic dibromides or phenols. These reactions are carried out using phase transfer catalysis (PTC)s, which is under relatively mild conditions; however, the a very convenient method for chemical activated dicarboxylic-acid chlorides must be modification, especially esterification9 or ether prepared and purified before the reaction. -
Industrial Applications of Nano Cu-Chromite Catalyzer
International Journal of Chemical Studies 2018; 6(4): 86-90 P-ISSN: 2349–8528 E-ISSN: 2321–4902 IJCS 2018; 6(4): 86-90 Industrial applications of nano Cu-Chromite © 2018 IJCS Received: 26-05-2018 catalyzer Accepted: 29-06-2018 Pouresmaeily Seyed Mohammad Pouresmaeily Seyed Mohammad, H Shirkavand Behzad, Shahidzadeh Department of Chemistry & Mansour and Ebrahimi Sobhan Chemical Engineering Malek-e- Ashtar University of Technology, Shabanlou, Iran Abstract Nano Cu-Chromite catalyzer is a high usage catalyzer in chemical reactions. This catalyzer has many H Shirkavand Behzad applications in oxidation, hydrogenation, dehydrogenation, alkylation, alcohol decomposition, useful Department of Chemistry & reactions in petroleum include: reforming. Recyclable is one of advantages of this catalyzer. This Chemical Engineering Malek-e- catalyzer produces by sol-gel, co-precipitating, deposition in vacuum and ceramic methods. This paper Ashtar University of explores applications of this catalyzer in various industries. Technology, Shabanlou, Iran Shahidzadeh Mansour Keywords: Nano Cu-Chromite, hydrogen producing, nano catalyzer Institute for Color Science & Technology, Shams, Iran Introduction Cu-Chromite is an important catalyzer in chemical reactions that has wide application in Ebrahimi Sobhan synthesis of organic chemistry processes. Uses in many reactions such as: hydrogenation, Department of Material Science and Engineering, Sharif dehydrogenation, hydrogenolysis, oxidation, alkylation, cycloaddition, as catalyzer for University of Technology, -
Polymer Exemption Guidance Manual POLYMER EXEMPTION GUIDANCE MANUAL
United States Office of Pollution EPA 744-B-97-001 Environmental Protection Prevention and Toxics June 1997 Agency (7406) Polymer Exemption Guidance Manual POLYMER EXEMPTION GUIDANCE MANUAL 5/22/97 A technical manual to accompany, but not supersede the "Premanufacture Notification Exemptions; Revisions of Exemptions for Polymers; Final Rule" found at 40 CFR Part 723, (60) FR 16316-16336, published Wednesday, March 29, 1995 Environmental Protection Agency Office of Pollution Prevention and Toxics 401 M St., SW., Washington, DC 20460-0001 Copies of this document are available through the TSCA Assistance Information Service at (202) 554-1404 or by faxing requests to (202) 554-5603. TABLE OF CONTENTS LIST OF EQUATIONS............................ ii LIST OF FIGURES............................. ii LIST OF TABLES ............................. ii 1. INTRODUCTION ............................ 1 2. HISTORY............................... 2 3. DEFINITIONS............................. 3 4. ELIGIBILITY REQUIREMENTS ...................... 4 4.1. MEETING THE DEFINITION OF A POLYMER AT 40 CFR §723.250(b)... 5 4.2. SUBSTANCES EXCLUDED FROM THE EXEMPTION AT 40 CFR §723.250(d) . 7 4.2.1. EXCLUSIONS FOR CATIONIC AND POTENTIALLY CATIONIC POLYMERS ....................... 8 4.2.1.1. CATIONIC POLYMERS NOT EXCLUDED FROM EXEMPTION 8 4.2.2. EXCLUSIONS FOR ELEMENTAL CRITERIA........... 9 4.2.3. EXCLUSIONS FOR DEGRADABLE OR UNSTABLE POLYMERS .... 9 4.2.4. EXCLUSIONS BY REACTANTS................ 9 4.2.5. EXCLUSIONS FOR WATER-ABSORBING POLYMERS........ 10 4.3. CATEGORIES WHICH ARE NO LONGER EXCLUDED FROM EXEMPTION .... 10 4.4. MEETING EXEMPTION CRITERIA AT 40 CFR §723.250(e) ....... 10 4.4.1. THE (e)(1) EXEMPTION CRITERIA............. 10 4.4.1.1. LOW-CONCERN FUNCTIONAL GROUPS AND THE (e)(1) EXEMPTION................. -
(12) United States Patent (10) Patent No.: US 8,242.228 B2 Cox Et Al
USOO8242228B2 (12) United States Patent (10) Patent No.: US 8,242.228 B2 Cox et al. (45) Date of Patent: Aug. 14, 2012 (54) LOW HAZE THERMOPLASTIC (58) Field of Classification Search .................... 528/44, POLYURETHANE USING MIXTURE OF 528/59, 65, 66,80, 81, 85; 252/182.2, 182.21, CHAIN EXTENDERS INCLUDING 1.3- AND 252/182,22, 182.25, 182.28 1,4-CYCLOHEXANEDIMETHANOL See application file for complete search history. (56) References Cited (76) Inventors: John M. Cox, Lake Jackson, TX (US); Francisco Lerma, Lake Jackson, TX U.S. PATENT DOCUMENTS (US); Mark F. Sonnenschein, Midland, 4.245,081 A * 1/1981 Quiring et al. .................. 528.65 MI (US) 6,187,968 B1 2/2001 Itoh et al. 6,521,164 B1* 2/2003 Plummer et al. ......... 264,328.17 Subject to any disclaimer, the term of this 2002/O1236O1 A1 9/2002 Sonnenschein et al. (*) Notice: 2009.01.04449 A1 4/2009 Farah et al. ................ 428/422.8 patent is extended or adjusted under 35 2009,0198O14 A1* 8, 2009 Baikerikar et al. ........... 524,849 U.S.C. 154(b) by 137 days. FOREIGN PATENT DOCUMENTS (21) Appl. No.: 12/593,377 EP O781792 A 7/1997 OTHER PUBLICATIONS (22) PCT Filed: Dec. 3, 2007 Paint & Coatings Industry, UNOXOL Diol: A new liquid (86). PCT No.: PCT/US2007/024.753 cycloaliphatic diol for coating applications. Jun. 2006. Presented by Argyropoulus, John et al. S371 (c)(1), A new liquid cycloaliphatic diol for coating Applications. (2), (4) Date: Sep. 28, 2009 Argyropoulos, John et al. Presented at the International Waterborne, High-Solids, and Powder Coatings Symposium, Feb. -
TR-121: Dimethyl Terephthalate (CASRN 120-61-6)
National Cancer Institute CARCINOGENESIS Technical Report Series NO. 121 1979 BIOASSAY OF DIMETHYL TEREPHTHALATE FOR POSSIBLE CARCINOGEN ICITY CAS No. 120-61-6 NCI-CG-TR-121 U.S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE Public Health Service National Institutes of Health BIOASSAY OF DIMETHYL TEREPHTHALATE FOR POSSIBLE CARCINOGENICITY Carcinogenesis Testing Program Division of Cancer Cause and Prevention National Cancer Institute National Institutes of Health Bethesda, Maryland 20205 U.S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE Public Health Service National Institutes of Health NIH Publication No. 79-1376 BIOASSAY OF DIMETHYL TEREPHTHALATE FOR POSSIBLE CARCINOGENICITY Carcinogenesis Testing Program Division of Cancer Cause and Prevention National Cancer Institute National Institutes of Health FOREWORD! This report presents the results of the bioassay of dimethyl terephthalate conducted for the Carcinogenesis Testing Program, Division of Cancer Cause and Prevention, National Cancer Institute (NCI), National Institutes of Health, Bethesda, Maryland. This is one of a series of experiments designed to determine whether selected chemicals have the capacity to produce cancer in animals. A negative result, in which the test animals do not have a greater incidence of cancer than control animals, does not necessarily mean that the test chemical is not a carcinogen, inasmuch as the experi ments are conducted under a limited set of circumstances. A positive result demonstrates that the test chemical is carcinogenic for animals under the conditions of the test and indicates that exposure to the chemical is a potential risk to man. The actual determination of the risk to man from chemicals found to be carcinogenic in animals requires a wider analysis. -
AP-42, CH 6.11: Terephthalic Acid
6.11 Terephthalic Acid 6.11.1 Process Description1 Terephthalic acid (TPA) is made by air oxidation of p-xylene and requires purification for use in polyester fiber manufacture. A typical continuous process for the manufacture of crude terephthalic acid (C-TPA) is shown in Figure 6.11-1. The oxidation and product recovery portion essentially consists of the Mid-Century oxidation process, whereas the recovery and recycle of acetic acid and recovery of methyl acetate are essentially as practiced by dimethyl terephthalate (DMT) technology. The purpose of the DMT process is to convert the terephthalic acid contained in C-TPA to a form that will permit its separation from impurities. C-TPA is extremely insoluble in both water and most common organic solvents. Additionally, it does not melt, it sublimes. Some products of partial oxidation of p-xylene, such as p-toluic acid and p-formyl benzoic acid, appear as impurities in TPA. Methyl acetate is also formed in significant amounts in the reaction. 6.11.1.1 C-TPA Production - Oxidation Of p-Xylene - p-Xylene (stream 1 of Figure 6.11-1), fresh acetic acid (2), a catalyst system such as manganese or cobalt acetate and sodium bromide (3), and recovered acetic acid are combined into the liquid feed entering the reactor (5). Air (6), compressed to a reaction pressure of about 2000 kPa (290 psi), is fed to the reactor. The temperature of the exothermic reaction is maintained at about 200°C (392°F) by controlling the pressure at which the reaction mixture is permitted to boil and form the vapor stream leaving the reactor (7). -
Copper ( II ) Chloride
Copyright © Tarek Kakhia. All rights reserved. http://tarek.kakhia.org Copper Contents 1 Introduction 2 History o 2.1 Copper Age o 2.2 Bronze Age o 2.3 Antiquity and Middle Ages o 2.4 Modern period 3 Characteristics o 3.1 Color o 3.2 Group 11 of the periodic table o 3.3 Occurrence o 3.4 Mechanical properties o 3.5 Electrical properties o 3.6 Corrosion . 3.6.1 Pure water and air/oxygen . 3.6.2 In contact with other metals . 3.6.3 Sulfide media . 3.6.4 Ammonia media . 3.6.5 Chloride media o 3.7 Germicidal effect o 3.8 Isotopes 4 Production 5 Applications o 5.1 Piping o 5.2 Electrical applications o 5.3 Architecture / Industry o 5.4 Household products o 5.5 Coinage o 5.6 Biomedical applications o 5.7 Chemical applications o 5.8 Other 6 Alloys 7 Compounds 8 Biological role 9 Recycling 1 Copyright © Tarek Kakhia. All rights reserved. http://tarek.kakhia.org 1 Introduction : Copper is a chemical element with the symbol Cu ( Latin : cuprum ) and atomic number 29 . It is a ductile metal with very high thermal and electrical conductivity. Pure copper is rather soft and malleable and a freshly - exposed surface has a pinkish or peachy color. It is used as a thermal conductor, an electrical conductor, a building material, and a constituent of various metal alloys. Copper metal and alloys have been used for thousands of years. In the Roman era, copper was principally mined on Cyprus, hence the origin of the name of the metal as Cyprium, "metal of Cyprus", later shortened to Cuprum. -
(TPA) Is Made by Air Oxidation of P-Xylene and Requires Purification for Use in Polyester Fiber Manufacture
6.11 Terephthalic Acid 6.11.1 Process Description1 Terephthalic acid (TPA) is made by air oxidation of p-xylene and requires purification for use in polyester fiber manufacture. A typical continuous process for the manufacture of crude terephthalic acid (C-TPA) is shown in Figure 6.11-1. The oxidation and product recovery portion essentially consists of the Mid-Century oxidation process, whereas the recovery and recycle of acetic acid and recovery of methyl acetate are essentially as practiced by dimethyl terephthalate (DMT) technology. The purpose of the DMT process is to convert the terephthalic acid contained in C-TPA to a form that will permit its separation from impurities. C-TPA is extremely insoluble in both water and most common organic solvents. Additionally, it does not melt, it sublimes. Some products of partial oxidation of p-xylene, such as p-toluic acid and p-formyl benzoic acid, appear as impurities in TPA. Methyl acetate is also formed in significant amounts in the reaction. 6.11.1.1 C-TPA Production - Oxidation Of p-Xylene - p-Xylene (stream 1 of Figure 6.11-1), fresh acetic acid (2), a catalyst system such as manganese or cobalt acetate and sodium bromide (3), and recovered acetic acid are combined into the liquid feed entering the reactor (5). Air (6), compressed to a reaction pressure of about 2000 kPa (290 psi), is fed to the reactor. The temperature of the exothermic reaction is maintained at about 200°C (392°F) by controlling the pressure at which the reaction mixture is permitted to boil and form the vapor stream leaving the reactor (7). -
Process for the Preparation of Cyclohexanedimethanol Verfahren Zur Herstellung Von Cyclohexandimethanol Procede De Preparation De Cyclohexanedimethanol
Europäisches Patentamt *EP000922690B1* (19) European Patent Office Office européen des brevets (11) EP 0 922 690 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.7: C07C 31/27, C07C 29/149, of the grant of the patent: C07C 69/608, C07C 67/303, 03.12.2003 Bulletin 2003/49 B01J 23/86, B01J 23/46, (21) Application number: 97928455.1 C07C 69/75 (22) Date of filing: 25.06.1997 (86) International application number: PCT/JP97/02188 (87) International publication number: WO 98/000383 (08.01.1998 Gazette 1998/01) (54) PROCESS FOR THE PREPARATION OF CYCLOHEXANEDIMETHANOL VERFAHREN ZUR HERSTELLUNG VON CYCLOHEXANDIMETHANOL PROCEDE DE PREPARATION DE CYCLOHEXANEDIMETHANOL (84) Designated Contracting States: • YOSHIDA, Yasuhisa BE CH DE ES FR GB IT LI LU NL PT Kyoto 611 (JP) • IWAMURA, Taiichiro (30) Priority: 28.06.1996 JP 18875996 Kyoto 610-01 (JP) 22.10.1996 JP 35937396 • NAKAZAWA, Mikio 24.12.1996 JP 35617696 Kyoto 611 (JP) 26.02.1997 JP 5993197 (74) Representative: Barz, Peter, Dr. et al (43) Date of publication of application: Patentanwalt 16.06.1999 Bulletin 1999/24 Kaiserplatz 2 80803 München (DE) (73) Proprietor: SK NJC Co., Ltd. Suwon-si, Kyungki-do (KR) (56) References cited: WO-A-94/29261 FR-A- 1 276 722 (72) Inventors: JP-A- 6 192 146 JP-A- 6 321 823 • ITOH, Hiroshi US-A- 3 334 149 Kyoto 619-02 (JP) Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. -
A Thesis Entitled Chemical Recycling of Poly (Ethylene Terephthalate)
A Thesis Entitled Chemical Recycling of Poly (Ethylene Terephthalate) and its Co-polyesters with 2, 5- Furandicarboxylic Acid using Alkaline Hydrolysis by Keerthi Vinnakota Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Master of Science Degree in Chemical Engineering ________________________________________ Dr. Maria Coleman, Committee Chair ________________________________________ Dr. Joseph Lawrence, Committee Member ________________________________________ Dr. Sridhar Viamajala, Committee Member ________________________________________ Dr. Amanda Bryant-Friedrich, Dean College of Graduate Studies The University of Toledo August 2018 i Copyright 2108, Keerthi Vinnakota This document is copyrighted material. Under copyright law, no parts of this document may be reproduced without the expressed permission of the author. ii An Abstract of Chemical Recycling of Poly (Ethylene Terephthalate) and its Co-polyesters with 2, 5- Furandicarboxylic Acid using Alkaline Hydrolysis by Keerthi Vinnakota Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Master of Science Degree in Chemical Engineering The University of Toledo August 2018 The large increase in the generation of post-consumer plastic in past few decades has led to an increased interest in eco-friendly recycling technologies. Polyethylene terephthalate (PET) is a highly valued packaging material with broad applications because it is strong, lightweight, non-reactive, non-toxic and shatterproof. To extend its applications, the packaging industry adds co-monomers, additives, multilayered structures and forms polymer blends to improve the mechanical and barrier properties of the base polyester. These additives can pose challenges to the mechanical recycling methods that are commonly used in the industry. While mechanical recycling is economical and broadly commercially used, the recycled PET (RPET) tends to have reduced molecular weight and can degrade in the presence of impurities (i.e. -
Terephthalic Acid & Dimethyl Terephthalate
Report No. 9-A TEREPHTHALICACID AND DIMETHYLTEREPHTHALATE SUPPLEMENT A by LLOYD M. ELKIN m . contributions by SHIGEYOSHI TAKAOKA January 1967 A private report by the l PROCESS ECONOMICS PROGRAM STANFORD RESEARCH INSTITUTE MENLO PARK, CALIFORNIA I CONTENTS I INTRODUCTION. ........................ 1 II SUMMARY ........................... 3 III INDUSTRY STATUS . 9 IV CHEMISTRY . 15 Ammoxidation of p-Xylene . 15 Terephthalic Acid by Bromine-Promoted Catalytic Air Oxidation ofp-Xylene......................... 17 Terephthalic Acid by Catalytic Oxidation of p-Xylene in the Presence of Methyl Ethyl Ketone (MEK) Activator , . 18 Terephthalic Acid by Nitric Acid Oxidation of p-Xylene . 19 Terephthalic Acid from Phthalic Anhydride . 19 Dimethyl Terephthalate from p-Xylene by Successive Oxidations and Esterifications . 20 V BIS(B-HYDROXYETHYL) TEREPHTHALATE FROM TEREPHTHALONITRILE MADE BY AMMOXIDATION OF P-XYLENE ................. 23 Review of Processes ..................... 23 Crude Terephthalonitrile Production and Purification .... 23 Ammonia Recovery ...................... 27 Bis(2-hydroxyethyl) terephthalate Production and Purification ....................... 27 Process Description ..................... 29 Process Discussion ..... ; ................ 51 Crude Terephthalonitrile Production ............ 51 Ammonia Recovery ...................... 52 Terephthalonitrile Purification .............. 52 Bis(2-hydroxyethyl) terephthalate Production ........ 52 Bis(2-hydroxyethyl) terephthalate Purification ....... 53 Ethylene Glycol Recovery .................