MX173249B - Particulas de oxido de cromo trivalente acuosas/carbono - Google Patents
Particulas de oxido de cromo trivalente acuosas/carbonoInfo
- Publication number
- MX173249B MX173249B MX024740A MX2474091A MX173249B MX 173249 B MX173249 B MX 173249B MX 024740 A MX024740 A MX 024740A MX 2474091 A MX2474091 A MX 2474091A MX 173249 B MX173249 B MX 173249B
- Authority
- MX
- Mexico
- Prior art keywords
- carbon
- reduce
- hexavalent
- aqueous
- trivalent chromium
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/85—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by XPS, EDX or EDAX data
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
La presente invención se refiere a un metodo para producir partículas que comprende óxido de cromo trivalente acuoso que tiene la fórmula empírica CrO2H asociado íntimamente con un substrato carbonoxo pulverulento que comprende A) formar una composición que comprende 1) una solución acuosa de un compuesto de cromo hexavalente soluble en agua; y 2) un agente reductor en una cantidad sufiente para reducir el compuesto de cromo hexavalente en el óxido de cromo trivalente acuoso y para reducir el compuesto de cromo trivalente acuoso en cromo metálico, el agente reductor comprende un substrato carbonoso pulverulente insoluble en agua en una cantidad en exceso de la cantidad requerida para reducir el compuesto de cromo hexavalente en el óxido de cromo trivalente acuoso, mediante lo cual por lo menos cierta cantidad del substrato carbonoso permanece despues de haberse reducido el compuesto de cromo hexavalente en el óxido de cromo trivalente acuoso; y B) calentar la composición bajo presión hasta una temperatura por lo menos de aproximadamente 100 grados C, cuya temperatura es suficiente para reducir el compuesto de cromo hexavalente en el óxido de cromo trivalente cuoso mediante lo cual se forman las partículas.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/487,313 US5133947A (en) | 1990-03-02 | 1990-03-02 | Hydrous trivalent chromium oxide/carbon particles and method of making the same |
Publications (1)
Publication Number | Publication Date |
---|---|
MX173249B true MX173249B (es) | 1994-02-11 |
Family
ID=23935235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX024740A MX173249B (es) | 1990-03-02 | 1991-02-28 | Particulas de oxido de cromo trivalente acuosas/carbono |
Country Status (7)
Country | Link |
---|---|
US (1) | US5133947A (es) |
EP (1) | EP0450307B1 (es) |
JP (1) | JPH04270123A (es) |
BR (1) | BR9100848A (es) |
DE (1) | DE69115322T2 (es) |
MX (1) | MX173249B (es) |
ZA (1) | ZA911492B (es) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5296236A (en) * | 1988-09-16 | 1994-03-22 | Recordati S.A., Chemical And Pharmaceutical Company | Controlled release therapeutic system for a liquid pharmaceutical formulations |
US5259866A (en) * | 1990-10-23 | 1993-11-09 | Japan Metals & Chemicals Co., Ltd. | Method for producing high-purity metallic chromium |
EP1585500B8 (en) * | 2002-12-20 | 2017-07-26 | Auritec Pharmaceuticals | Coated particles for sustained-release pharmaceutical administration |
US8273190B2 (en) | 2009-05-29 | 2012-09-25 | Bulk Chemicals, Inc. | Method for making and using chromium III salts |
US8425692B2 (en) | 2010-05-27 | 2013-04-23 | Bulk Chemicals, Inc. | Process and composition for treating metal surfaces |
EP3240770B1 (en) | 2014-12-31 | 2019-02-13 | SABIC Global Technologies B.V. | Process for enhancing the performance of the dehydrogenation of alkanes |
SG11201803156TA (en) | 2015-10-27 | 2018-05-30 | Eupraxia Pharmaceuticals Inc | Sustained release formulations of local anesthetics |
CN115477327A (zh) * | 2022-09-23 | 2022-12-16 | 绵阳光达环保科技有限责任公司 | 一种乙醇或甲醇还原铬酸钠生产羟基氧化铬的生产工艺 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2833645A (en) * | 1955-08-19 | 1958-05-06 | Union Carbide Corp | Reduction of chromium oxides |
US2850378A (en) * | 1956-12-17 | 1958-09-02 | Walter M Weil | Production of chromium by low-pressure reduction of oxides |
US3090670A (en) * | 1959-06-18 | 1963-05-21 | Nat Distillers Chem Corp | Zirconium dioxide recovery |
US3065095A (en) * | 1959-08-26 | 1962-11-20 | Nat Distillers Chem Corp | Process for preparing chromium oxide |
DE1296291B (de) * | 1965-09-01 | 1969-05-29 | Siegle & Co Gmbh Farbenfabrike | Verfahren zur Herstellung feinteiliger Eisenoxid-Chromoxid-Mischkristallpigmente |
US4033867A (en) * | 1974-07-19 | 1977-07-05 | Betz Laboratories, Inc. | Chromate reduction in aqueous medium |
GB1532601A (en) * | 1977-01-17 | 1978-11-15 | Ontario Research Foundation | Production of chromium carbide and ferrochrome alloys |
US4148628A (en) * | 1977-02-18 | 1979-04-10 | Toyo Soda Manufacturing Co., Ltd. | Process of producing metallic chromium |
US4127643A (en) * | 1977-11-03 | 1978-11-28 | Ppg Industries, Inc. | Preparation of pigmentary chromic oxide |
US4367213A (en) * | 1982-04-29 | 1983-01-04 | Olin Corporation | Use of selected catalyzed hydrazine compositions to reduce hexavalent chromium [Cr(VI)] |
-
1990
- 1990-03-02 US US07/487,313 patent/US5133947A/en not_active Expired - Lifetime
-
1991
- 1991-02-28 ZA ZA911492A patent/ZA911492B/xx unknown
- 1991-02-28 DE DE69115322T patent/DE69115322T2/de not_active Expired - Fee Related
- 1991-02-28 EP EP91103042A patent/EP0450307B1/en not_active Expired - Lifetime
- 1991-02-28 MX MX024740A patent/MX173249B/es unknown
- 1991-03-01 BR BR919100848A patent/BR9100848A/pt unknown
- 1991-03-01 JP JP3036376A patent/JPH04270123A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH04270123A (ja) | 1992-09-25 |
DE69115322D1 (de) | 1996-01-25 |
ZA911492B (en) | 1991-12-24 |
US5133947A (en) | 1992-07-28 |
EP0450307A1 (en) | 1991-10-09 |
DE69115322T2 (de) | 1996-05-02 |
EP0450307B1 (en) | 1995-12-13 |
BR9100848A (pt) | 1991-11-05 |
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