GB752859A - Vapor phase process for the manufacture of diphenylamine - Google Patents
Vapor phase process for the manufacture of diphenylamineInfo
- Publication number
- GB752859A GB752859A GB18680/54A GB1868054A GB752859A GB 752859 A GB752859 A GB 752859A GB 18680/54 A GB18680/54 A GB 18680/54A GB 1868054 A GB1868054 A GB 1868054A GB 752859 A GB752859 A GB 752859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aniline
- catalyst
- diphenylamine
- vapour
- passed
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/64—Preparation of compounds containing amino groups bound to a carbon skeleton by disproportionation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Diphenylamine is manufactured by a continuous vapour phase process which comprises passing undiluted aniline vapour at superatmospheric pressure into a reaction chamber maintained at 400-550 DEG C. and containing a non-base-exchanging catalyst such as alumina, titania, or bauxite; condensing the effluent from the reaction chamber, and separating the diphenylamine formed from excess aniline and ammonia. Specified pressures are 15-100 p.s.i.g. The aniline vapour is passed at a rate of between 15 and 2000 parts by weight of liquid aniline per hour per 100 parts by weight of catalyst. The aniline feed is stopped after a suitable period and air or other oxygen-containing gas is passed through the catalyst bed to burn off accumulated tar and carbonaceous matter, and regenerate the catalyst. In examples the process is described using various pressures, temperatures, feed rates and catalysts. Specification 473,739 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US752859XA | 1953-07-08 | 1953-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB752859A true GB752859A (en) | 1956-07-18 |
Family
ID=22124712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18680/54A Expired GB752859A (en) | 1953-07-08 | 1954-06-25 | Vapor phase process for the manufacture of diphenylamine |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB752859A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2938055A (en) * | 1956-09-18 | 1960-05-24 | American Cyanamid Co | Heat recovery system for diphenylamine process |
| US2968676A (en) * | 1958-10-06 | 1961-01-17 | American Cyanamid Co | Preparation of dpa over fluoride impregnated catalyst |
| US3118944A (en) * | 1959-08-07 | 1964-01-21 | American Cyanamid Co | Vapor phase process for the manufacture of diphenylamine |
| CN115260040A (en) * | 2021-09-16 | 2022-11-01 | 山西紫罗蓝新材料科技有限公司 | A kind of extraction process of diphenylamine with high conversion rate and its application |
-
1954
- 1954-06-25 GB GB18680/54A patent/GB752859A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2938055A (en) * | 1956-09-18 | 1960-05-24 | American Cyanamid Co | Heat recovery system for diphenylamine process |
| US2968676A (en) * | 1958-10-06 | 1961-01-17 | American Cyanamid Co | Preparation of dpa over fluoride impregnated catalyst |
| US3118944A (en) * | 1959-08-07 | 1964-01-21 | American Cyanamid Co | Vapor phase process for the manufacture of diphenylamine |
| CN115260040A (en) * | 2021-09-16 | 2022-11-01 | 山西紫罗蓝新材料科技有限公司 | A kind of extraction process of diphenylamine with high conversion rate and its application |
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