GB862848A - Regeneration of cuprous chloride catalysts - Google Patents
Regeneration of cuprous chloride catalystsInfo
- Publication number
- GB862848A GB862848A GB23486/58A GB2348658A GB862848A GB 862848 A GB862848 A GB 862848A GB 23486/58 A GB23486/58 A GB 23486/58A GB 2348658 A GB2348658 A GB 2348658A GB 862848 A GB862848 A GB 862848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cuprous
- precipitate
- chloride
- alkali
- reaction
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
Abstract
An aqueous spent acrylonitrile synthesis catalyst containing (a) cuprous chloride, (b) at least one alkali or alkaline earth chloride or ammonium chloride and (c) carbon-containing impurities is regenerated by precipitating the copper as cuprous hydroxide, separating the precipitate and reconverting to cuprous chloride by reaction with hydrochloric acid. Preferably the spent catalyst is added to an aqueous liquor containing an alkali or alkaline earth metal hydroxide (particularly NaOH, but Ca(OH)2 is also specified), which may be in 10-25% excess, and the resulting mixture is heated, a precipitation temperature of 70-90 DEG C. being particularly preferred. Other preferred features are: - (1) an inert atmosphere is maintained over the reaction mixture during precipitation; (2) copper powder is present during precipitation; (3) precipitated cuprous hydroxide is centrifugally separated above 60 DEG C.; (4) the precipitate is reslurried with dilute caustic alkali and thereafter separated above 60 DEG C.; (5) KCl is added to the precipitate prior to reaction with HCl, in an amount to give a KCl:NaCl ratio of substantially 3 : 1 in the regenerated catalyst.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US862848XA | 1957-07-22 | 1957-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB862848A true GB862848A (en) | 1961-03-15 |
Family
ID=22197538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23486/58A Expired GB862848A (en) | 1957-07-22 | 1958-07-22 | Regeneration of cuprous chloride catalysts |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB862848A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676307A (en) * | 2020-12-11 | 2021-04-20 | 江苏优普生物化学科技股份有限公司 | Method for reducing and recycling catalyst residues |
-
1958
- 1958-07-22 GB GB23486/58A patent/GB862848A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676307A (en) * | 2020-12-11 | 2021-04-20 | 江苏优普生物化学科技股份有限公司 | Method for reducing and recycling catalyst residues |
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