JPS5738764A - Preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acid - Google Patents
Preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acidInfo
- Publication number
- JPS5738764A JPS5738764A JP11442680A JP11442680A JPS5738764A JP S5738764 A JPS5738764 A JP S5738764A JP 11442680 A JP11442680 A JP 11442680A JP 11442680 A JP11442680 A JP 11442680A JP S5738764 A JPS5738764 A JP S5738764A
- Authority
- JP
- Japan
- Prior art keywords
- nitrotoluene
- molybdenum
- give
- sulfonic acid
- added
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To improve the oxidation yield remarkably and obtain the titled compound useful as raw material for a fluorescent brightening agent, etc., by oxidizing a 4-nitrotoluene-2-sulfonic acid in an alkaline aqueous solution in the presence of a mixed catalyst of molybdenum, etc. with manganese sulfate.
CONSTITUTION: A 4-nitrotoluene-2-sulfonic acid, e.g. sodium 4-nitrotoluene-2- sulfonate, is dissolved in water, and sodium hydroxide is added thereto to give an alkaline aqueous solution. A mixed catalyst of one or more types of molybdenum, barium, iron, nickel and cobalt compounds, e.g. molybdenum trioxide, with manganese sulfate, is added to the solution, and the oxidation reaction is carried out at 30W80°C, preferably 45W70°C, while blowing air thereinto to give the aimed compound.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11442680A JPS5738764A (en) | 1980-08-19 | 1980-08-19 | Preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11442680A JPS5738764A (en) | 1980-08-19 | 1980-08-19 | Preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5738764A true JPS5738764A (en) | 1982-03-03 |
Family
ID=14637410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11442680A Pending JPS5738764A (en) | 1980-08-19 | 1980-08-19 | Preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5738764A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4680146A (en) * | 1985-05-31 | 1987-07-14 | Bayer Aktiengesellschaft | Process for the preparation of 4,4'-dinitrostilbene-2,2'-disulphonic acid salts |
CN1052475C (en) * | 1993-09-08 | 2000-05-17 | 拜尔公司 | Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid |
CN102351748A (en) * | 2011-08-22 | 2012-02-15 | 山西阳煤丰喜肥业(集团)有限责任公司 | Preparation method for DNS (4,4'-dinitrostilbene-2,2'-disulphonic acid) sodium salt in DSD (4,4'-diaminodiphenylethylene-2,2'-disulfonic acid) acid production process |
-
1980
- 1980-08-19 JP JP11442680A patent/JPS5738764A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4680146A (en) * | 1985-05-31 | 1987-07-14 | Bayer Aktiengesellschaft | Process for the preparation of 4,4'-dinitrostilbene-2,2'-disulphonic acid salts |
CN1052475C (en) * | 1993-09-08 | 2000-05-17 | 拜尔公司 | Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid |
CN102351748A (en) * | 2011-08-22 | 2012-02-15 | 山西阳煤丰喜肥业(集团)有限责任公司 | Preparation method for DNS (4,4'-dinitrostilbene-2,2'-disulphonic acid) sodium salt in DSD (4,4'-diaminodiphenylethylene-2,2'-disulfonic acid) acid production process |
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