JPS5675449A - Precipitation of anthraquinone - Google Patents

Precipitation of anthraquinone

Info

Publication number
JPS5675449A
JPS5675449A JP15058779A JP15058779A JPS5675449A JP S5675449 A JPS5675449 A JP S5675449A JP 15058779 A JP15058779 A JP 15058779A JP 15058779 A JP15058779 A JP 15058779A JP S5675449 A JPS5675449 A JP S5675449A
Authority
JP
Japan
Prior art keywords
sulfuric acid
anthraquinone
concentration
slurry
heating
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
JP15058779A
Other languages
Japanese (ja)
Other versions
JPS623819B2 (en
Inventor
Tsunehiro Sakai
Koichi Yoshiura
Shiro Fujii
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP15058779A priority Critical patent/JPS5675449A/en
Publication of JPS5675449A publication Critical patent/JPS5675449A/en
Publication of JPS623819B2 publication Critical patent/JPS623819B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prepare a slurry of anthraquinone fine crystals in sulfuric acid, by dissolving anthraquinone in concentrated sulfuric acid with heating, and adjusting the concentration of sulfuric acid first by adding sulfuric acid of specific concentration, and if necessary adding dilute sulfuric acid or water to the solution.
CONSTITUTION: Anthraquinone is dissolved completely in concentrated sulfuric acid (≥95%) by heating at 60W150°C. The objective slurry of anthraquinone fine crystals in sulfuric acid can be obtained by adding first a sulfuric acid of 50W80% concentration to the solution at 50W120°C to reduce the concentration of the sulfuric acid, and if necessary, adding a dilute sulfuric acid or water to the mixture at 50W 120°C to adjust the concentration of the sulfuric acid to 95W70%. The anthraquinone may have a substituent group such as halogen, OH, alkyl, allyloxy, acylamino, etc.
EFFECT: The use of the above fine crystalline slurry enables the smooth nitrification of anthraquinone.
COPYRIGHT: (C)1981,JPO&Japio
JP15058779A 1979-11-22 1979-11-22 Precipitation of anthraquinone Granted JPS5675449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15058779A JPS5675449A (en) 1979-11-22 1979-11-22 Precipitation of anthraquinone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15058779A JPS5675449A (en) 1979-11-22 1979-11-22 Precipitation of anthraquinone

Publications (2)

Publication Number Publication Date
JPS5675449A true JPS5675449A (en) 1981-06-22
JPS623819B2 JPS623819B2 (en) 1987-01-27

Family

ID=15500139

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15058779A Granted JPS5675449A (en) 1979-11-22 1979-11-22 Precipitation of anthraquinone

Country Status (1)

Country Link
JP (1) JPS5675449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106045839A (en) * 2016-06-04 2016-10-26 江阴市长江化工有限公司 Preparation method of superfine anthraquinone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106045839A (en) * 2016-06-04 2016-10-26 江阴市长江化工有限公司 Preparation method of superfine anthraquinone
CN106045839B (en) * 2016-06-04 2018-08-10 江阴市长江化工有限公司 A kind of preparation method of ultra-fine anthraquinone

Also Published As

Publication number Publication date
JPS623819B2 (en) 1987-01-27

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