GB1429441A - 4,4-diaminostilbene-2,2-disulphonic aicd - Google Patents
4,4-diaminostilbene-2,2-disulphonic aicdInfo
- Publication number
- GB1429441A GB1429441A GB1724074A GB1724074A GB1429441A GB 1429441 A GB1429441 A GB 1429441A GB 1724074 A GB1724074 A GB 1724074A GB 1724074 A GB1724074 A GB 1724074A GB 1429441 A GB1429441 A GB 1429441A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaminostilbene
- disulphonic
- disulphonic acid
- aicd
- april
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
1429441 Process for the preparation of 4,4<SP>1</SP>- diaminostilbene - 2,2<SP>1</SP>- disulphonic acid BAYER AG 19 April 1974 [21 April 1973 5 May 1973] 17240/74 Heading C2C The invention comprises a process for the preparation of 4,4<SP>1</SP>-diaminostilbene-2,2<SP>1</SP>-disulphonic acid or an alkali metal or alkaline earth metal salt thereof by reduction of 4,4<SP>1</SP>-dinitrostilbene-2,21-disulphonic acid or an alkali metal or alkaline earth metal salt thereof with hydrogen in solution or suspension (e.g. in water and/ or methanol) at a pH of 2 or greater at a temperature of 15-120‹ C. and a pressure of 1-250 bars in the presence of at least 0À1% by weight of a Group VIII metal as catalyst and, if the product is desired in free acid form, acidification of the reduced product.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732320416 DE2320416C3 (en) | 1973-04-21 | 1973-04-21 | Process for the preparation of 4,4'-diaminostilbenedisulfonic acid- (2,2 ') or their alkali or alkaline earth metal salts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1429441A true GB1429441A (en) | 1976-03-24 |
Family
ID=5878905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1724074A Expired GB1429441A (en) | 1973-04-21 | 1974-04-19 | 4,4-diaminostilbene-2,2-disulphonic aicd |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5012059A (en) |
| AT (1) | AT327179B (en) |
| BE (1) | BE813948A (en) |
| CA (1) | CA1027965A (en) |
| CH (1) | CH586665A5 (en) |
| DE (1) | DE2320416C3 (en) |
| ES (1) | ES425532A1 (en) |
| FR (1) | FR2226390B1 (en) |
| GB (1) | GB1429441A (en) |
| IE (1) | IE39374B1 (en) |
| IT (1) | IT1009948B (en) |
| LU (1) | LU69902A1 (en) |
| NL (1) | NL7405275A (en) |
| SE (1) | SE7405235L (en) |
-
1973
- 1973-04-21 DE DE19732320416 patent/DE2320416C3/en not_active Expired
-
1974
- 1974-04-18 NL NL7405275A patent/NL7405275A/xx not_active Application Discontinuation
- 1974-04-18 SE SE7405235A patent/SE7405235L/sv unknown
- 1974-04-19 CA CA197,842A patent/CA1027965A/en not_active Expired
- 1974-04-19 LU LU69902A patent/LU69902A1/xx unknown
- 1974-04-19 AT AT326174A patent/AT327179B/en not_active IP Right Cessation
- 1974-04-19 IT IT2167774A patent/IT1009948B/en active
- 1974-04-19 FR FR7413798A patent/FR2226390B1/fr not_active Expired
- 1974-04-19 BE BE143406A patent/BE813948A/en unknown
- 1974-04-19 JP JP4353674A patent/JPS5012059A/ja active Pending
- 1974-04-19 GB GB1724074A patent/GB1429441A/en not_active Expired
- 1974-04-19 CH CH546974A patent/CH586665A5/xx not_active IP Right Cessation
- 1974-04-19 IE IE84574A patent/IE39374B1/en unknown
- 1974-04-20 ES ES425532A patent/ES425532A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT327179B (en) | 1976-01-26 |
| CH586665A5 (en) | 1977-04-15 |
| IE39374B1 (en) | 1978-09-27 |
| CA1027965A (en) | 1978-03-14 |
| JPS5012059A (en) | 1975-02-07 |
| BE813948A (en) | 1974-10-21 |
| DE2320416C3 (en) | 1981-06-25 |
| FR2226390B1 (en) | 1978-01-20 |
| NL7405275A (en) | 1974-10-23 |
| ATA326174A (en) | 1975-04-15 |
| IT1009948B (en) | 1976-12-20 |
| ES425532A1 (en) | 1976-07-16 |
| LU69902A1 (en) | 1974-11-21 |
| IE39374L (en) | 1974-10-21 |
| DE2320416A1 (en) | 1974-11-07 |
| SE7405235L (en) | 1974-10-22 |
| FR2226390A1 (en) | 1974-11-15 |
| DE2320416B2 (en) | 1980-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 49S | Specification amended (sect. 9/1949) |