JPS5540648A - Selective production of 1,6-naphthalenedisolfonic acid - Google Patents
Selective production of 1,6-naphthalenedisolfonic acidInfo
- Publication number
- JPS5540648A JPS5540648A JP11438478A JP11438478A JPS5540648A JP S5540648 A JPS5540648 A JP S5540648A JP 11438478 A JP11438478 A JP 11438478A JP 11438478 A JP11438478 A JP 11438478A JP S5540648 A JPS5540648 A JP S5540648A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- naphthalenedisolfonic
- sulfur trioxide
- naphthalenesulfonic acid
- selective production
- 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.)
- Granted
Links
Abstract
PURPOSE: The selective sulfonation of 1-naphthalenesulfonic acid with sulfur trioxide-dioxane adduct is effected to produce title compound in high yield.
CONSTITUTION: The reaction of naphthalene with sulfur trioxide-dioxane adduct is conducted at 0W120, preferably 20W50°C for 10W60min to form 1-naphthalenesulfonic acid. After neutralization with an alkali as sodium hydroxide, 1-naphthalenesulfonic acid salt is isolated. Then, the sulfonation of the product is repeated using sulfur trioxide/dioxane adduct at 100W150, preferably 120W140°C to produce 1,6-naphthalenedisulfonic acid.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11438478A JPS5540648A (en) | 1978-09-18 | 1978-09-18 | Selective production of 1,6-naphthalenedisolfonic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11438478A JPS5540648A (en) | 1978-09-18 | 1978-09-18 | Selective production of 1,6-naphthalenedisolfonic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5540648A true JPS5540648A (en) | 1980-03-22 |
JPS5525183B2 JPS5525183B2 (en) | 1980-07-04 |
Family
ID=14636315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11438478A Granted JPS5540648A (en) | 1978-09-18 | 1978-09-18 | Selective production of 1,6-naphthalenedisolfonic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5540648A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102993060A (en) * | 2012-07-30 | 2013-03-27 | 枣庄市泰瑞精细化工有限公司 | Preparation method of 1,6-naphthalenedisulfonic acid disodium salt |
CN102993062A (en) * | 2012-07-30 | 2013-03-27 | 枣庄市泰瑞精细化工有限公司 | Preparation method for producing 1,6-sodium naphthalenedisulfonate by use of 2-naphthalene sulfonic acid reaction mother liquid |
-
1978
- 1978-09-18 JP JP11438478A patent/JPS5540648A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102993060A (en) * | 2012-07-30 | 2013-03-27 | 枣庄市泰瑞精细化工有限公司 | Preparation method of 1,6-naphthalenedisulfonic acid disodium salt |
CN102993062A (en) * | 2012-07-30 | 2013-03-27 | 枣庄市泰瑞精细化工有限公司 | Preparation method for producing 1,6-sodium naphthalenedisulfonate by use of 2-naphthalene sulfonic acid reaction mother liquid |
Also Published As
Publication number | Publication date |
---|---|
JPS5525183B2 (en) | 1980-07-04 |
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