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Vanadium Pentoxide and Other Inorganic Vanadium Compounds
This report contains the collective views of an international group of experts and does not necessarily represent the decisions or the stated policy of the United Nations Environment Programme, the International Labour Organization, or the World Health Organization. Concise International Chemical Assessment Document 29 VANADIUM PENTOXIDE AND OTHER INORGANIC VANADIUM COMPOUNDS Note that the layout and pagination of this pdf file are not identical to the printed CICAD First draft prepared by Dr M. Costigan and Mr R. Cary, Health and Safety Executive, Liverpool, United Kingdom, and Dr S. Dobson, Centre for Ecology and Hydrology, Huntingdon, United Kingdom Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organization, and the World Health Organization, and produced within the framework of the Inter-Organization Programme for the Sound Management of Chemicals. World Health Organization Geneva, 2001 The International Programme on Chemical Safety (IPCS), established in 1980, is a joint venture of the United Nations Environment Programme (UNEP), the International Labour Organization (ILO), and the World Health Organization (WHO). The overall objectives of the IPCS are to establish the scientific basis for assessment of the risk to human health and the environment from exposure to chemicals, through international peer review processes, as a prerequisite for the promotion of chemical safety, and to provide technical assistance in strengthening national capacities for the sound management -
Study of Phosphorus Behaviour in Levitated Silicon-Iron Droplets
STUDY OF PHOSPHORUS BEHAVIOUR IN LEVITATED SILICON-IRON DROPLETS by Katherine Le A thesis submitted in conformity with the requirements for the degree of Master of Applied Science Department of Materials Science and Engineering University of Toronto © Copyright by Katherine Le 2016 ii Study of Phosphorus Behaviour in Levitated Si-Fe Droplets Katherine Le Master of Applied Science Department of Materials Science and Engineering University of Toronto 2016 Abstract While the treatment of relatively inexpensive ferrosilicon alloys is a potential refining route in order to generate solar grade silicon, phosphorus is one of the more difficult impurities to remove by conventional processing. In this project, electromagnetic levitation was used to investigate the dephosphorization of ferrosilicon alloy droplets exposed to H2-Ar gas mixtures under various experimental conditions including, refining time, temperature (1450°C-1720°C), H2-Ar gas concentrations and flow rate, iron alloying content, and initial phosphorus concentration. Reaction rates increased with higher refining times, temperatures, and H2 gas concentrations. With unknown parameters associated with the kinetics of gas phase reactions, the approach involved comparison of apparent activation energies derived for the chemical reaction and gas diffusion steps of the dephosphorization process. The phosphorus removal rate is thought to be controlled by the interfacial reaction step; further work is required to confirm this conclusion. iii Acknowledgements I would like to express my gratitude and respect to my supervisor, Prof. Alex McLean for the opportunity to work on this research. I am thankful for his guidance, wisdom and encouragement throughout the course of my studies. He is a truly inspiring person, and a great enabler of new learning opportunities. -
Binary and Ternary Transition-Metal Phosphides As Hydrodenitrogenation Catalysts
Research Collection Doctoral Thesis Binary and ternary transition-metal phosphides as hydrodenitrogenation catalysts Author(s): Stinner, Christoph Publication Date: 2001 Permanent Link: https://doi.org/10.3929/ethz-a-004378279 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use. ETH Library Diss. ETH No. 14422 Binary and Ternary Transition-Metal Phosphides as Hydrodenitrogenation Catalysts A dissertation submitted to the Swiss Federal Institute of Technology Zurich for the degree of Doctor of Natural Sciences Presented by Christoph Stinner Dipl.-Chem. University of Bonn born February 27, 1969 in Troisdorf (NRW), Germany Accepted on the recommendation of Prof. Dr. Roel Prins, examiner Prof. Dr. Reinhard Nesper, co-examiner Dr. Thomas Weber, co-examiner Zurich 2001 I Contents Zusammenfassung V Abstract IX 1 Introduction 1 1.1 Motivation 1 1.2 Phosphides 4 1.2.1 General 4 1.2.2 Classification 4 1.2.3 Preparation 5 1.2.4 Properties 12 1.2.5 Applications and Uses 13 1.3 Scope of the Thesis 14 1.4 References 16 2 Characterization Methods 1 2.1 FT Raman Spectroscopy 21 2.2 Thermogravimetric Analysis 24 2.3 Temperature-Programmed Reduction 25 2.4 X-Ray Powder Diffractometry 26 2.5 Nitrogen Adsorption 28 2.6 Solid State Nuclear Magnetic Resonance Spectroscopy 28 2.7 Catalytic Test 33 2.8 References 36 3 Formation, Structure, and HDN Activity of Unsupported Molybdenum Phosphide 37 3.1 Introduction -
Ferro Vanadium Production Business. Ferrovanadium Market Is Expected to Expand at a CAGR of 5.0% Between 2018 and 2028
www.entrepreneurindia.co Introduction Ferro Vanadium is an alloy which is formed by combining iron and vanadium with a vanadium content range of 35%-85%. Ferro Vanadium is a universal hardener, strengthener and anti-corrosive additive for steels like high-strength low-alloy (HSLA) steel, tool steels, as well as other ferrous-based products. Ferro vanadium belongs to the category of ferroalloy. Ferro vanadium is an alloy which is formed by combining iron and vanadium. Ferrovanadium contains 35% to 85% of vanadium depending on applications of the product in end-use industry. Ferro vanadium is an alloy material that is used in manufacturing of steel. It imparts desirable properties such as abrasion resistance, high temperature and hardenability. www.entrepreneurindia.co Ferro vanadium used for manufacturing of steel offers the end product with high stability against alkalis as well as acids such as sulphuric and hydrochloric acids. In addition, products containing ferro vanadium are at reduced risk to be susceptible to corrosion. Ferro vanadium also helps in reducing the overall weight of the material as well as increasing the overall tensile strength of the end product. In addition, it helps in promoting fine grain size and increasing hardenability through precipitation of nitrides and carbides. Ferro vanadium is manufactured using an electric arc furnace in which scrap iron is melted initially and then it is combined with the mixture of aluminum as well as flux such as calcium fluoride and calcium oxide. It is usually supplied in pallet boxes or in shrink wrapped in super bags. www.entrepreneurindia.co Ferro Vanadium is produced from Vanadium Sludge & usually available in the range with V: 50-85%. -
Download SCOPE Newsletter
With participation of the European Commission: DG GROW and Joint Research Centre Summary of joint European Commission – ESPP webinar th on P4 (phosphorus) Critical Raw Material, 9 July 2020 This ESPP SCOPE Newsletter summarises discussions at the expert webinar jointly organised by ESPP and the European Commission on 9th July, with participation of Contents the leading companies using phosphorus (P4) or its derivatives in Europe, with additional input from the The EU Critical Raw Materials: “Phosphate Rock” and “Phosphorus”........................................................................... 2 independent industry expert Willem Schipper. The content (Fig. i) Overview numbers: from phosphate rock to P4 / P4-derivatives below has been seen by the participants but does not and applications .................................................................................. 3 represent their position, it represents ESPP’s own How is P4 produced? the phosphorus furnace .............. 4 assessment. Photo: P4 furnace ................................................................................ 4 Schematic: P4 manufacture process (simplified) ................................. 4 This webinar aimed to provide expert input to the European Which chemicals critically depend on P4 / P4 derivatives? . 5 Commission’s MSA (Material System Analysis) of the EU dependency on P4 concerns many industry sectors . 5 specific industrial form of “Phosphorus”, P4, as a Critical (Fig. ii) Production via wet-acid or via P4 / P4 derivatives / ‘thermal’ Raw -
The Determination of Vanadium and Chromium in Ferrovanadium by Electrometric Titration' by G
Oct., 1921 THE JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY 939 CONCLUSIONS Modifications in bleaching methods give promise of greater The chemical characteristics of soda and sulfate pulps result,s than modifying cooking methods. indicate that they are a very pure form of wood cellulose and Modifications in which the bleaching operation was divided capable of high yields of white fibrous and resistant material. into two steps, with washing between steps, cut the bleach The sulfate process is much more efficient than the soda requirement in two. process in yielding a bleachable pulp from coniferous wood. Pulps of better quality, both from physical and chemical The coloring matter in pulps is of the nature of a dye and considerations, are obtained by cooking the wood as little can be removed without materially reducing yields. Most as possible in isolating the fibers and by accomplishing as of the action in cooking to reduce bleach consumption is to much of the burden of purification as possible in the bleaching dissolve and degrade the cellulose. and washing operations. The Determination of Vanadium and Chromium in Ferrovanadium by Electrometric Titration' By G. L. Kelley, J. A. Wiley, R. T. Bohn and W. e. Wright MIDVALESTEEL & ORDNANCE C0.p NICETOWNPLANT, PHILADELPHIA, PENNSYLVANtd The object of this paper is to describe a method for the When the vanadyl sulfate is titrated at 80" C. with perman- determination of vanadium in ferrovanadium not subject ganate in a similar acid concentration, the change of poten- to interference by chromium, which is so often present. Kel- tial is about 60 mv. -
Catalog of Standard Reference Materials
NATL INST. OF STAND & TECH Bureau of Standards £-01 Admin. Bldg. AUG 1 8 1970 NBS SPECIAL PUBLICATION 260 NBS JULY 1970 EDITION PUBLICATIONS Catalog of 9TAMDARD "REFERENCE MATERIALS U.S. DEPARTMENT OF COMMERCE National Bureau of Standards - NATIONAL BUREAU OF STANDARDS The National Bureau of Standards 1 was established by an act of Congress March 3, 1901. Today, in addition to serving as the Nation's central measurement laboratory, the Bureau is a principal focal point in the Federal Government for assuring maximum application of the physical and engineering sciences to the advancement of technology in industry and commerce. To this end the Bureau conducts research and provides central national services in four broad program areas. These are: (1) basic measurements and standards, (2) materials measurements and standards, (3) technological measurements and standards, and (4) transfer of technology. The Bureau comprises the Institute for Basic Standards, the Institute for Materials Research, the Institute for Applied Technology, the Center for Radiation Research, the Center for Computer Sciences and Technology, and the Office for Information Programs. THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates that system with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry, and com- merce. The Institute consists of an Office of Measurement Services and the following technical divisions: Applied Mathematics—Electricity—Metrology—Mechanics—Heat—Atomic and Molec- ular Physics—Radio Physics - —Radio Engineering -—Time and Frequency -—Astro- physics - —Cryogenics. -
Other Than Radioactive Ores) Answering to a Description in Heading 2844 Or 2845 Are to Be Classified in Those Headings and in No Other Heading of the Tariff Schedule
)&f1y3X SECTION VI PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES VI-1 Notes 1. (a) Goods (other than radioactive ores) answering to a description in heading 2844 or 2845 are to be classified in those headings and in no other heading of the tariff schedule. (b) Subject to paragraph (a) above, goods answering to a description in heading 2843 or 2846 are to be classified in those headings and in no other heading of this section. 2. Subject to note 1 above, goods classifiable in heading 3004, 3005, 3006, 3212, 3303, 3304, 3305, 3306, 3307, 3506, 3707 or 3808 by reason of being put up in measured doses or for retail sale are to be classified in those headings and in no other heading of the tariff schedule. 3. Goods put up in sets consisting of two or more separate constituents, some or all of which fall in this section and are intended to be mixed together to obtain a product of section VI or VII, are to be classified in the heading appropriate to that product, provided that the constituents are: (a) Having regard to the manner in which they are put up, clearly identifiable as being intended to be used together without first being repacked; (b) Entered together; and (c) Identifiable, whether by their nature or by the relative proportions in which they are present, as being complementary one to another. Additional U.S. Notes 1. In determining the amount of duty applicable to a solution of a single compound in water subject to duty in this section at a specific rate, an allowance in weight or volume, as the case may be, shall be made for the water in excess of any water of crystallization which may be present in the undissolved compound. -
Minerals, Critical Minerals
MINERALS, CRITICAL MINERALS, AND THE U.S. ECONOMY Prepublication Version THIS PREPUBLICATION VERSION OF MINERALS, CRITICAL MINERALS, AND THE U.S. ECONOMY has been provided to the public to facilitate timely access to the committee’s findings. Although the substance of the report is final, editorial changes may be made throughout the text, and citations will be checked prior to publication. The final report will be available through the National Academies Press in the December/January timeframe. MINERALS, CRITICAL MINERALS, AND THE U.S. ECONOMY Committee on Critical Mineral Impacts on the U.S. Economy Committee on Earth Resources Board on Earth Sciences and Resources Division on Earth and Life Studies THE NATIONAL ACADEMIES PRESS Washington, D.C. www.nap.edu Prepublication Version – Subject to Further Editorial Revision THE NATIONAL ACADEMIES PRESS • 500 Fifth Street, N.W. • Washington, DC 20001 NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance. This study was supported by the Department of the Interior / U.S. Geological Survey, under Award No. 06HQGR0204, and by the National Mining Association. The opinions, findings, and conclusions or recommendations contained in this document are those of the authors and do not necessarily reflect the views of the organizations or agencies that provided support for the project. -
Toxicological Profile for Vanadium
TOXICOLOGICAL PROFILE FOR VANADIUM U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES Public Health Service Agency for Toxic Substances and Disease Registry September 2012 VANADIUM ii DISCLAIMER Use of trade names is for identification only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry, the Public Health Service, or the U.S. Department of Health and Human Services. VANADIUM iii UPDATE STATEMENT A Toxicological Profile for Vanadium, Draft for Public Comment was released in September 2009. This edition supersedes any previously released draft or final profile. Toxicological profiles are revised and republished as necessary. For information regarding the update status of previously released profiles, contact ATSDR at: Agency for Toxic Substances and Disease Registry Division of Toxicology and Human Health Sciences (proposed) Environmental Toxicology Branch (proposed) 1600 Clifton Road NE Mailstop F-62 Atlanta, Georgia 30333 VANADIUM iv This page is intentionally blank. VANADIUM v FOREWORD This toxicological profile is prepared in accordance with guidelines* developed by the Agency for Toxic Substances and Disease Registry (ATSDR) and the Environmental Protection Agency (EPA). The original guidelines were published in the Federal Register on April 17, 1987. Each profile will be revised and republished as necessary. The ATSDR toxicological profile succinctly characterizes the toxicologic and adverse health effects information for the toxic substances each profile describes. Each peer-reviewed profile identifies and reviews the key literature that describes a substance's toxicologic properties. Other pertinent literature is also presented but is described in less detail than the key studies. The profile is not intended to be an exhaustive document; however, more comprehensive sources of specialty information are referenced. -
(CDR) by CASRN Or Accession Number
List of Chemicals Reported for the 2012 Chemical Data Reporting (CDR) by CASRN or Accession Number For the 2012 CDR, 7,674 unique chemicals were reported by manufacturers (including importers). Chemicals are listed by CAS Registry Number (for non-confidential chemicals) or by TSCA Accession Number (for chemicals listed on the confidential portion of the TSCA Inventory). CASRN or CASRN or ACCESSION ACCESSION NUMBER CA INDEX NAME or GENERIC NAME NUMBER CA INDEX NAME or GENERIC NAME 100016 Benzenamine, 4-nitro- 10042769 Nitric acid, strontium salt (2:1) 10006287 Silicic acid (H2SiO3), potassium salt (1:2) 10043013 Sulfuric acid, aluminum salt (3:2) 1000824 Urea, N-(hydroxymethyl)- 10043115 Boron nitride (BN) 100107 Benzaldehyde, 4-(dimethylamino)- 10043353 Boric acid (H3BO3) 1001354728 4-Octanol, 3-amino- 10043524 Calcium chloride (CaCl2) 100174 Benzene, 1-methoxy-4-nitro- 100436 Pyridine, 4-ethenyl- 10017568 Ethanol, 2,2',2''-nitrilotris-, phosphate (1:?) 10043842 Phosphinic acid, manganese(2+) salt (2:1) 2,7-Anthracenedisulfonic acid, 9,10-dihydro- 100447 Benzene, (chloromethyl)- 10017591 9,10-dioxo-, sodium salt (1:?) 10045951 Nitric acid, neodymium(3+) salt (3:1) 100185 Benzene, 1,4-bis(1-methylethyl)- 100469 Benzenemethanamine 100209 1,4-Benzenedicarbonyl dichloride 100470 Benzonitrile 100210 1,4-Benzenedicarboxylic acid 100481 4-Pyridinecarbonitrile 10022318 Nitric acid, barium salt (2:1) 10048983 Phosphoric acid, barium salt (1:1) 9-Octadecenoic acid (9Z)-, 2-methylpropyl 10049044 Chlorine oxide (ClO2) 10024472 ester Phosphoric acid, -
Vanadium Recycling in the United States in 2004
U.S. Department of the Interior U.S. Geological Survey Vanadium Recycling in the United States in 2004 By Thomas G. Goonan U.S. GEOLOGICAL SURVEY CIRCULAR 1196–S Version 1.1, October 6, 2011 FLOW STUDIES FOR RECYCLING METAL COMMODITIES IN THE UNITED STATES U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Reston, Virginia: 2011 Version 1.0 was released online August 4, 2011. Version 1.1 was released online October 6, 2011, to show a revision in the recycling rate on p. S3 and S10. For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: Goonan, T.G., 2011, Vanadium recycling in the United States in 2004 (ver. 1.1, October 6, 2011), chap. S of Sibley, S.F., ed., Flow studies for recycling metal commodities in the United States: U.S. Geological Survey Circular 1196, p. S1–S17, available only online.