GB1549533A - Process for the purification of phthalic anhydride - Google Patents

Process for the purification of phthalic anhydride

Info

Publication number
GB1549533A
GB1549533A GB4245977A GB4245977A GB1549533A GB 1549533 A GB1549533 A GB 1549533A GB 4245977 A GB4245977 A GB 4245977A GB 4245977 A GB4245977 A GB 4245977A GB 1549533 A GB1549533 A GB 1549533A
Authority
GB
United Kingdom
Prior art keywords
phthalic anhydride
purification
crystallising
plasticisers
purified
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
GB4245977A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of GB1549533A publication Critical patent/GB1549533A/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
    • C07C51/54—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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Furan Compounds (AREA)

Abstract

Crude phthalic anhydride is purified by crystallising it from acetic acid. The resulting phthalic anhydride is of high purity and may be used for the preparation of plasticisers.
GB4245977A 1976-10-16 1977-10-12 Process for the purification of phthalic anhydride Expired GB1549533A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762646808 DE2646808C3 (en) 1976-10-16 1976-10-16 Process for the purification of phthalic anhydride obtained in the course of the anthraquinone production

Publications (1)

Publication Number Publication Date
GB1549533A true GB1549533A (en) 1979-08-08

Family

ID=5990635

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4245977A Expired GB1549533A (en) 1976-10-16 1977-10-12 Process for the purification of phthalic anhydride

Country Status (6)

Country Link
JP (1) JPS5845436B2 (en)
BE (1) BE859720A (en)
CH (1) CH633549A5 (en)
DE (1) DE2646808C3 (en)
FR (1) FR2367759A1 (en)
GB (1) GB1549533A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117986217A (en) * 2024-04-03 2024-05-07 南京化学试剂股份有限公司 Method for treating high-content phthalic anhydride raw material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114853705A (en) * 2022-04-24 2022-08-05 河北海力香料股份有限公司 Method for preparing chlorophthalic anhydride by recovering 4-chlorophthalic acid monosodium salt reaction mother liquor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR648163A (en) * 1927-05-13 1928-12-06 Cie Nat Matieres Colorantes Process for the purification of crude phthalic anhydride obtained by catalysis
FR1429745A (en) * 1964-04-02 1966-02-25 Basf Ag Process for the production of pure phthalic anhydride from o-xylene
DE2245555C2 (en) * 1972-09-16 1982-06-09 Bayer Ag, 5090 Leverkusen Process for the production of anthraquinone
RO59914A (en) * 1972-04-15 1976-06-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117986217A (en) * 2024-04-03 2024-05-07 南京化学试剂股份有限公司 Method for treating high-content phthalic anhydride raw material
CN117986217B (en) * 2024-04-03 2024-06-04 南京化学试剂股份有限公司 Phthalic anhydride raw material treatment method

Also Published As

Publication number Publication date
JPS5845436B2 (en) 1983-10-08
JPS5350132A (en) 1978-05-08
DE2646808B2 (en) 1979-01-25
CH633549A5 (en) 1982-12-15
BE859720A (en) 1978-04-14
DE2646808C3 (en) 1979-09-20
DE2646808A1 (en) 1978-04-20
FR2367759A1 (en) 1978-05-12
FR2367759B1 (en) 1982-11-12

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee