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GB951451A - Process for the manufacture of linear quinacridone in the ª‰-crystal phase - Google Patents

Process for the manufacture of linear quinacridone in the ª‰-crystal phase

Info

Publication number
GB951451A
GB951451A GB1729860A GB1729860A GB951451A GB 951451 A GB951451 A GB 951451A GB 1729860 A GB1729860 A GB 1729860A GB 1729860 A GB1729860 A GB 1729860A GB 951451 A GB951451 A GB 951451A
Authority
GB
United Kingdom
Prior art keywords
range
temperature
quinacridone
ethylene glycol
diethylene glycol
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.)
Expired
Application number
GB1729860A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst AG
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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB951451A publication Critical patent/GB951451A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B48/00—Quinacridones

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Linear quinacridone in the beta-phase is made by heating a wet crude linear quinacridone, obtained by condensing 2 : 5-dianilinoterephthalic acid with polyphosphoric acid, under superatmospheric pressure at a temperature in the range of about 120 DEG C. to about 200 DEG C. with an aqueous solution of an inorganic base or mixture of inorganic bases, (a) in the presence of an organic diluent which is inert to alkali, or (b) in the absence of an organic diluent, in which case, after filtering and washing the quinacridone until neutral, the wet press cake is, if desired, heated with an organic diluent under superatmospheric pressure at a temperature within the range of about 120 DEG C. to about 180 DEG C. or under atmospheric pressure at a temperature within the range of about 100 DEG C. to about 180 DEG C. Organic diluents mentioned for (a) are ethanol, propanol, butanol, ethylene glycol, diethylene glycol, the mono-methyl, ethyl and butyl ethers of ethylene glycol and diethylene glycol monoethyl ether and mixtures thereof, and for (b) dimethylformamide, N-methyl-acetamide, diethylene glycol monoethyl ether, ethylene glycol, propanol, butanol, hexanol, triethanolamine, quinoline, dimethyl aniline, nitrobenzene, dichlorobenzene, malonic ester, phenol and diphenyl diphenyloxide. Inorganic bases which may be used are the hydroxides and carbonates of sodium and potassium and ammonium hydroxide and mixtures thereof. Examples are given. Specifications 828,052 and 868,360 are referred to.
GB1729860A 1959-05-15 1960-05-16 Process for the manufacture of linear quinacridone in the ª‰-crystal phase Expired GB951451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0002844 1959-05-15

Publications (1)

Publication Number Publication Date
GB951451A true GB951451A (en) 1964-03-04

Family

ID=7083516

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1729860A Expired GB951451A (en) 1959-05-15 1960-05-16 Process for the manufacture of linear quinacridone in the ª‰-crystal phase

Country Status (1)

Country Link
GB (1) GB951451A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5591258A (en) * 1993-11-25 1997-01-07 Hoechst Aktiengesellschaft Preparation of linear, unsubstituted quinacridone pigments of the β-phase
US5662739A (en) * 1994-01-07 1997-09-02 Hoechst Aktiengesellschaft Use of fatty acid taurides for the dispersion of polycyclic pigments
US5755872A (en) * 1996-04-02 1998-05-26 Hoechst Aktiengesellschaft Process for preparing quinacridone pigments

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5591258A (en) * 1993-11-25 1997-01-07 Hoechst Aktiengesellschaft Preparation of linear, unsubstituted quinacridone pigments of the β-phase
US5662739A (en) * 1994-01-07 1997-09-02 Hoechst Aktiengesellschaft Use of fatty acid taurides for the dispersion of polycyclic pigments
US5755872A (en) * 1996-04-02 1998-05-26 Hoechst Aktiengesellschaft Process for preparing quinacridone pigments

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