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GB823507A - Improvements in or relating to the purification of tetrachlorophthalic acid and its anhydride - Google Patents

Improvements in or relating to the purification of tetrachlorophthalic acid and its anhydride

Info

Publication number
GB823507A
GB823507A GB364258A GB364258A GB823507A GB 823507 A GB823507 A GB 823507A GB 364258 A GB364258 A GB 364258A GB 364258 A GB364258 A GB 364258A GB 823507 A GB823507 A GB 823507A
Authority
GB
United Kingdom
Prior art keywords
solution
anhydride
acid
tetrachlorophthalic
purification
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
GB364258A
Other languages
English (en)
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.)
Chemische Werke Witten GmbH
Original Assignee
Chemische Werke Witten GmbH
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 Chemische Werke Witten GmbH filed Critical Chemische Werke Witten GmbH
Publication of GB823507A publication Critical patent/GB823507A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/573—Separation; Purification; Stabilisation; Use of additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Furan Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
GB364258A 1957-02-04 1958-02-04 Improvements in or relating to the purification of tetrachlorophthalic acid and its anhydride Expired GB823507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI12788A DE1031779B (de) 1957-02-04 1957-02-04 Verfahren zur Reinigung von Tetrachlorphthalsaeure oder deren Anhydrid

Publications (1)

Publication Number Publication Date
GB823507A true GB823507A (en) 1959-11-11

Family

ID=7185448

Family Applications (1)

Application Number Title Priority Date Filing Date
GB364258A Expired GB823507A (en) 1957-02-04 1958-02-04 Improvements in or relating to the purification of tetrachlorophthalic acid and its anhydride

Country Status (4)

Country Link
BE (1) BE564338A (xx)
DE (1) DE1031779B (xx)
FR (1) FR1202126A (xx)
GB (1) GB823507A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632032A1 (en) * 1993-06-02 1995-01-04 Nippon Light Metal Co., Ltd. Process for purifying tetrachlorophthalic anhydride and high-purity tetrachlorophthalic anhydride
US7495113B2 (en) 2004-12-22 2009-02-24 Sabic Innovative Plastics Method of purifying dianhydrides
US7863463B2 (en) 2005-11-22 2011-01-04 Sabic Innovative Plastics Ip B.V. Method of purifying dianhydrides
RU2811367C1 (ru) * 2023-03-02 2024-01-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кабардино-Балкарский государственный университет им. Х.М. Бербекова" (КБГУ) Способ получения 3,4,5,6-тетрахлорфталевой кислоты

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5706593A (en) * 1997-02-06 1998-01-13 Allard; Alice J. Compact ironing board securable to an edge

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632032A1 (en) * 1993-06-02 1995-01-04 Nippon Light Metal Co., Ltd. Process for purifying tetrachlorophthalic anhydride and high-purity tetrachlorophthalic anhydride
US5493033A (en) * 1993-06-02 1996-02-20 Nippon Light Metal Company, Ltd. Process for purifying tetrachlorophthalic anhydride
US7495113B2 (en) 2004-12-22 2009-02-24 Sabic Innovative Plastics Method of purifying dianhydrides
US7863463B2 (en) 2005-11-22 2011-01-04 Sabic Innovative Plastics Ip B.V. Method of purifying dianhydrides
RU2811367C1 (ru) * 2023-03-02 2024-01-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кабардино-Балкарский государственный университет им. Х.М. Бербекова" (КБГУ) Способ получения 3,4,5,6-тетрахлорфталевой кислоты

Also Published As

Publication number Publication date
BE564338A (xx)
DE1031779B (de) 1958-06-12
FR1202126A (fr) 1960-01-07

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