JPS5756450A - Preparation of naphthalenesulfonic acid - Google Patents
Preparation of naphthalenesulfonic acidInfo
- Publication number
- JPS5756450A JPS5756450A JP13203080A JP13203080A JPS5756450A JP S5756450 A JPS5756450 A JP S5756450A JP 13203080 A JP13203080 A JP 13203080A JP 13203080 A JP13203080 A JP 13203080A JP S5756450 A JPS5756450 A JP S5756450A
- Authority
- JP
- Japan
- Prior art keywords
- naphthalene
- solvent
- sulfonation
- high yield
- decalin
- 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 obtain the titled compound useful as a raw material for naphthol by a simple operation in high yield, by sulfonating naphthalene wth a sulfonating agent in the presence of a specific organic solvent, recovering unreacted naphthalene in high yield, and reusing the solvent.
CONSTITUTION: Naphthalene is sulfonated with a sulfonating agent (e.g., sulfuric acid, fuming nitric acid, sufuric anhydride, etc.) to give naphthalenesulfonic acid. In the reaction, sulfonation is carried out in the presence of one or more organic solvents (e.g., methyldecalin, ethyldecalin, dimethyldecalin, etc.) selected from the group consisting of decalin, lower alkyl substituted decalin, and liquid paraffin. The solvent is insert and has no influence on sulfonation itself, capable of recovering ureacted naphthalene easily, and being used in the following sulfonation by recycling it. Usually the amount of the solvent is 0.1W5 times, preferably 0.3W2 times as much as that of naphthalene.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13203080A JPS5756450A (en) | 1980-09-22 | 1980-09-22 | Preparation of naphthalenesulfonic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13203080A JPS5756450A (en) | 1980-09-22 | 1980-09-22 | Preparation of naphthalenesulfonic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5756450A true JPS5756450A (en) | 1982-04-05 |
Family
ID=15071850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13203080A Pending JPS5756450A (en) | 1980-09-22 | 1980-09-22 | Preparation of naphthalenesulfonic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5756450A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108822006A (en) * | 2018-05-31 | 2018-11-16 | 山西豪仑科化工有限公司 | A kind of naphthalene sulfonation continuous reaction process |
-
1980
- 1980-09-22 JP JP13203080A patent/JPS5756450A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108822006A (en) * | 2018-05-31 | 2018-11-16 | 山西豪仑科化工有限公司 | A kind of naphthalene sulfonation continuous reaction process |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES468304A2 (en) | Improvements introduced in the purpose of pat.principal 432,342 by procedure for preparing detergent compositions based on ftalocianin of sulfonated cinc (Machine-translation by Google Translate, not legally binding) | |
JPS54130560A (en) | Sipro compound and its preparation | |
GB1183447A (en) | ||
JPS54163524A (en) | Production of high-purity 2-acrylamide-2- methylpropanesulfonic acid | |
JPS5756450A (en) | Preparation of naphthalenesulfonic acid | |
JPS5756451A (en) | Preparation of beta-naphthalenesulfonic acid | |
JPS5344528A (en) | Separation of dihalogenobenzenes | |
JPS52106819A (en) | Sulfonation | |
GB1519913A (en) | Purification of naphthalene | |
ES8106750A1 (en) | Process for the preparation of concentrated solutions of metal complex dyestuffs free from sulfonic groups. | |
JPS5777663A (en) | Preparation of 1-amino-4-bromoanthraquinone-2-sulfonic acid | |
DK0430352T3 (en) | Process for the Preparation of Paraffin Sulfonic Acids | |
JPS5640619A (en) | Production of octadiene | |
JPS5498738A (en) | Method of sulfonation | |
JPS52125138A (en) | Preparation of aromatice aldehydes | |
JPS5677254A (en) | Preparation of naphthalene-2,7-disulfonic acid | |
JPS5557554A (en) | Preparation of alkylbenzensulfonic acid | |
JPS56103157A (en) | Sulfonyl nitrite and its preparation | |
JPS54141748A (en) | Preparation of o-trifluoromethylbenzoic acid | |
JPS5334765A (en) | Isolation of 1,5-dinitroanthraquinone | |
JPS5540647A (en) | Production of 1,3,6-naphthalenetrisulfonic acid | |
JPS53135962A (en) | Preparation of 1-amino-2-bromo-4-hydroxyanthraquinone | |
JPS5579359A (en) | Preparation of ether sulfonate | |
JPS52136134A (en) | Preparation of #-phenylenediamine | |
JPS55129237A (en) | Preparation of 4,4'-dihydroxydiphenyl ether |