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FR2367759A1 - PHTHALIC ANHYDRIDE PURIFICATION PROCESS - Google Patents

PHTHALIC ANHYDRIDE PURIFICATION PROCESS

Info

Publication number
FR2367759A1
FR2367759A1 FR7731062A FR7731062A FR2367759A1 FR 2367759 A1 FR2367759 A1 FR 2367759A1 FR 7731062 A FR7731062 A FR 7731062A FR 7731062 A FR7731062 A FR 7731062A FR 2367759 A1 FR2367759 A1 FR 2367759A1
Authority
FR
France
Prior art keywords
phthalic anhydride
purification process
anhydride purification
degrees
acetic acid
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
FR7731062A
Other languages
French (fr)
Other versions
FR2367759B1 (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.)
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 FR2367759A1 publication Critical patent/FR2367759A1/en
Application granted granted Critical
Publication of FR2367759B1 publication Critical patent/FR2367759B1/fr
Granted 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

L'invention concerne un procédé de purification de l'anhydride phtalique. Selon l'invention, on prépare à 80-120 degrés C un mélange liquide homogène d'anhydride phtalique brut et d'acide acétique et on récupère par refroidissement à 20-50 degrés C de l'anhydride phtalique pur sous forme solide dans une liqueur mère consistant essentiellement en acide acétique.The invention relates to a method for purifying phthalic anhydride. According to the invention, a homogeneous liquid mixture of crude phthalic anhydride and acetic acid is prepared at 80-120 degrees C and pure phthalic anhydride is recovered by cooling to 20-50 degrees C in solid form in a liquor. mother consisting essentially of acetic acid.

FR7731062A 1976-10-16 1977-10-14 PHTHALIC ANHYDRIDE PURIFICATION PROCESS Granted FR2367759A1 (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 (2)

Publication Number Publication Date
FR2367759A1 true FR2367759A1 (en) 1978-05-12
FR2367759B1 FR2367759B1 (en) 1982-11-12

Family

ID=5990635

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7731062A Granted FR2367759A1 (en) 1976-10-16 1977-10-14 PHTHALIC ANHYDRIDE PURIFICATION PROCESS

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)

Families Citing this family (2)

* 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
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

Citations (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
FR2180806A1 (en) * 1972-04-15 1973-11-30 Bayer Ag
DE2245555A1 (en) * 1972-09-16 1974-03-21 Bayer Ag Anthraquinone prepn - by oxidn of naphthalene, reaction with butadiene and oxidn of tetrahydroanthraquinone

Patent Citations (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
FR2180806A1 (en) * 1972-04-15 1973-11-30 Bayer Ag
DE2245555A1 (en) * 1972-09-16 1974-03-21 Bayer Ag Anthraquinone prepn - by oxidn of naphthalene, reaction with butadiene and oxidn of tetrahydroanthraquinone

Also Published As

Publication number Publication date
DE2646808A1 (en) 1978-04-20
GB1549533A (en) 1979-08-08
JPS5350132A (en) 1978-05-08
DE2646808C3 (en) 1979-09-20
JPS5845436B2 (en) 1983-10-08
FR2367759B1 (en) 1982-11-12
CH633549A5 (en) 1982-12-15
DE2646808B2 (en) 1979-01-25
BE859720A (en) 1978-04-14

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Legal Events

Date Code Title Description
ST Notification of lapse