GB1341607A - Process for manufacturing anhydrous chromium sesquioxide vy reduction of a hexavalent compound of chromium - Google Patents
Process for manufacturing anhydrous chromium sesquioxide vy reduction of a hexavalent compound of chromiumInfo
- Publication number
- GB1341607A GB1341607A GB1357071*[A GB1357071A GB1341607A GB 1341607 A GB1341607 A GB 1341607A GB 1357071 A GB1357071 A GB 1357071A GB 1341607 A GB1341607 A GB 1341607A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- hydrogen
- reducing
- sesquioxide
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/26—Chromium
-
- 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
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
-
- 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
- C01P2006/90—Other properties not specified above
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
1341607 Chromium sesquioxide CERAVER 6 May 1971 [6 May 1970] 13570/71 Heading C1A [Also in Division B1] Anhydrous chromium sesquioxide is made by subjecting a dried hexavalent chromium compound, preferably chromium trioxide which is not decomposed thermally under 300 C. in the absence of a reducing agent, to heating in a non- reducing atmosphere at between 197 C. and 280 C. and then to heating in a reducing atmosphere between 250 C. and 350 C. An organic amino compound as reduction catalyst, e.g. pyridine may be added to the hexavalent chromium compound. The reducing atmosphere may be hydrogen or a mixture of hydrogen and inert gas. In the examples a rod of Al 2 O 3 is impregnated with solution containing 1 kg/litre of CoO 3 , pyridine being added to the solutions in Examples 2-5, the rods dried in an oven, non- reducing atmospheres of air or nitrogen and a temperature of 240 C. being used for the first step and reducing atmospheres of hydrogen with or without nitrogen at 280 to 340 C. for the second step. It is also possible to impregnate Cr 2 O 3 , ZnO, MgO, or SiO 2 (e.g. for the manufacture of catalysts) with the CrO 3 solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7016592A FR2104656B1 (en) | 1970-05-06 | 1970-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1341607A true GB1341607A (en) | 1973-12-25 |
Family
ID=9055184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1357071*[A Expired GB1341607A (en) | 1970-05-06 | 1971-05-06 | Process for manufacturing anhydrous chromium sesquioxide vy reduction of a hexavalent compound of chromium |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3749595A (en) |
| BE (1) | BE766446A (en) |
| CA (1) | CA932124A (en) |
| CH (1) | CH531990A (en) |
| DE (1) | DE2122299A1 (en) |
| ES (1) | ES390901A1 (en) |
| FR (1) | FR2104656B1 (en) |
| GB (1) | GB1341607A (en) |
| IT (1) | IT939715B (en) |
| LU (1) | LU63108A1 (en) |
| NL (1) | NL7106248A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3959182A (en) * | 1969-08-19 | 1976-05-25 | Rohm And Haas Company | Catalyst compositions and process for producing acrylic acid or methacrylic acid utilizing such catalyst |
| JPS5343918B2 (en) * | 1973-02-02 | 1978-11-24 | ||
| US4382104A (en) * | 1979-05-21 | 1983-05-03 | Kennecott Corporation | Method for coating alumina containing refractory fibers with chromium oxide |
| US5380554A (en) * | 1993-07-28 | 1995-01-10 | The United States Of America As Represented By The Secretary Of The Navy | Chromic oxide coatings by thermal decomposition of chromic acid anhydride (CrO3) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2294414A (en) * | 1937-11-09 | 1942-09-01 | Phillips Petroleum Co | Catalyst |
| US2270165A (en) * | 1937-12-29 | 1942-01-13 | Shell Dev | Catalyst |
| FR1084362A (en) * | 1952-07-16 | 1955-01-19 | Diamond Alkali Co | Process for treating alkali metal chromates |
-
1970
- 1970-05-06 FR FR7016592A patent/FR2104656B1/fr not_active Expired
-
1971
- 1971-04-29 BE BE766446A patent/BE766446A/en unknown
- 1971-04-29 CH CH637771A patent/CH531990A/en not_active IP Right Cessation
- 1971-05-04 US US00140274A patent/US3749595A/en not_active Expired - Lifetime
- 1971-05-05 CA CA112279A patent/CA932124A/en not_active Expired
- 1971-05-05 ES ES390901A patent/ES390901A1/en not_active Expired
- 1971-05-05 LU LU63108A patent/LU63108A1/xx unknown
- 1971-05-05 DE DE19712122299 patent/DE2122299A1/en active Pending
- 1971-05-05 IT IT68483/71A patent/IT939715B/en active
- 1971-05-06 GB GB1357071*[A patent/GB1341607A/en not_active Expired
- 1971-05-06 NL NL7106248A patent/NL7106248A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2122299A1 (en) | 1971-11-25 |
| US3749595A (en) | 1973-07-31 |
| BE766446A (en) | 1971-10-29 |
| CA932124A (en) | 1973-08-21 |
| IT939715B (en) | 1973-02-10 |
| FR2104656B1 (en) | 1973-11-23 |
| ES390901A1 (en) | 1973-07-01 |
| CH531990A (en) | 1972-12-31 |
| NL7106248A (en) | 1971-11-09 |
| FR2104656A1 (en) | 1972-04-21 |
| LU63108A1 (en) | 1972-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |