JPS57102857A - Preparation of 1-aminonaphthalene-3,6,8-trisulfonic acid - Google Patents

Preparation of 1-aminonaphthalene-3,6,8-trisulfonic acid

Info

Publication number
JPS57102857A
JPS57102857A JP17832880A JP17832880A JPS57102857A JP S57102857 A JPS57102857 A JP S57102857A JP 17832880 A JP17832880 A JP 17832880A JP 17832880 A JP17832880 A JP 17832880A JP S57102857 A JPS57102857 A JP S57102857A
Authority
JP
Japan
Prior art keywords
nitrated
compound
mixture
reduction
stoichiometric amount
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
Application number
JP17832880A
Other languages
Japanese (ja)
Other versions
JPS636064B2 (en
Inventor
Norio Kodera
Hiromichi Okabe
Tatsumi Nuno
Fumio Ooi
Yoji Korenaga
Kikumitsu Inoue
Hiroyuki Kajiwara
Shunichi Hayakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP17832880A priority Critical patent/JPS57102857A/en
Publication of JPS57102857A publication Critical patent/JPS57102857A/en
Publication of JPS636064B2 publication Critical patent/JPS636064B2/ja
Granted legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To prepare the titled compound quantitatively, by feeding a nitro compound which is a raw material of reduction reaction and is adjusted to a pH within a specific range, together with stoichiometric amount of iron powder to keep the pH in the reducing vessesl in the acidic range, continuously into the reducing vessel, and carrying out the reduction of the nitro compound.
CONSTITUTION: A mixture of nitrated naphthalenetrisulfonic acid (e.g. 1-nitronaphthalene-3,6,8-trisulfonic acid) is adjusted to pH1W4.5, and introduced together with stoichiometric amount of iron powder necessary to reduce the nitrated mixture into a reaction vessesl always containing excess iron powder (3.5W6.5 times weight of the stoichiometric amount necessary to reduce the nitrated mixture). The compound is made to react in a weakly acidic range at pH≤7, and the objective compound is extracted continuously from the reducing vessel. When the nitrated mixture is neutralized to the neutral range, the reaction liquid is shifted to the alkaline side by the amine and iron hydroxide, etc. produced by the reduction reaction, and the rate of reduction is lowered.
COPYRIGHT: (C)1982,JPO&Japio
JP17832880A 1980-12-16 1980-12-16 Preparation of 1-aminonaphthalene-3,6,8-trisulfonic acid Granted JPS57102857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17832880A JPS57102857A (en) 1980-12-16 1980-12-16 Preparation of 1-aminonaphthalene-3,6,8-trisulfonic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17832880A JPS57102857A (en) 1980-12-16 1980-12-16 Preparation of 1-aminonaphthalene-3,6,8-trisulfonic acid

Publications (2)

Publication Number Publication Date
JPS57102857A true JPS57102857A (en) 1982-06-26
JPS636064B2 JPS636064B2 (en) 1988-02-08

Family

ID=16046561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17832880A Granted JPS57102857A (en) 1980-12-16 1980-12-16 Preparation of 1-aminonaphthalene-3,6,8-trisulfonic acid

Country Status (1)

Country Link
JP (1) JPS57102857A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103113269A (en) * 2013-01-23 2013-05-22 绍兴奇彩化工有限公司 1,8-dinitro-3,6-naphthalene disulfonate hydrogenation reduction method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5490124A (en) * 1977-12-23 1979-07-17 Ciba Geigy Ag Method of reduction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5490124A (en) * 1977-12-23 1979-07-17 Ciba Geigy Ag Method of reduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103113269A (en) * 2013-01-23 2013-05-22 绍兴奇彩化工有限公司 1,8-dinitro-3,6-naphthalene disulfonate hydrogenation reduction method
CN103113269B (en) * 2013-01-23 2015-07-22 绍兴奇彩化工有限公司 1,8-dinitro-3,6-naphthalene disulfonate hydrogenation reduction method

Also Published As

Publication number Publication date
JPS636064B2 (en) 1988-02-08

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