GB1453507A - Recovery of phthalic anhydride - Google Patents

Recovery of phthalic anhydride

Info

Publication number
GB1453507A
GB1453507A GB1158174A GB1158174A GB1453507A GB 1453507 A GB1453507 A GB 1453507A GB 1158174 A GB1158174 A GB 1158174A GB 1158174 A GB1158174 A GB 1158174A GB 1453507 A GB1453507 A GB 1453507A
Authority
GB
United Kingdom
Prior art keywords
phthalic anhydride
hydrocarbon solvent
process gas
march
slurry
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
GB1158174A
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of GB1453507A publication Critical patent/GB1453507A/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

Abstract

1453507 Phthalic anhydride BASF AG 15 March 1974 [17 March 1973] 11581/74 Heading C2C A process for the continuous recovery of phthalic anhydride from process gas obtained in the catalytic atmospheric oxidation of o-xylene or naphthalene comprises treating the process gas with a hydrocarbon solvent comprising one or more paraffins of 26 to 44 carbon atoms and boiling at above 360‹ C. at standard pressure at a temperature of not less than 60‹ C., cooling the hydrocarbon solvent laden with phthalic anhydride to less than 135‹ C., separating the solid phthalic anhydride from the hydrocarbon solvent in the form of a slurry, recycling the separated solvent to the process gas treatment, and distilling the phthalic anhydride from the slurry after melting. The hydrocarbon solvent may also contain up to 10% by weight of one or more aromatic compounds.
GB1158174A 1973-03-17 1974-03-15 Recovery of phthalic anhydride Expired GB1453507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732313306 DE2313306A1 (en) 1973-03-17 1973-03-17 PROCESS FOR THE PRODUCTION OF PHTHALIC ANHYDRIDE

Publications (1)

Publication Number Publication Date
GB1453507A true GB1453507A (en) 1976-10-27

Family

ID=5875040

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1158174A Expired GB1453507A (en) 1973-03-17 1974-03-15 Recovery of phthalic anhydride

Country Status (6)

Country Link
JP (1) JPS49125330A (en)
AT (1) AT331783B (en)
BE (1) BE812185A (en)
DE (1) DE2313306A1 (en)
GB (1) GB1453507A (en)
IT (1) IT1008994B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207208A1 (en) * 1982-02-27 1983-09-08 Basf Ag, 6700 Ludwigshafen METHOD FOR THE CONTINUOUS PRODUCTION OF PHTHALIC ACID ANHYDRIDE AND MALEIC ACID ANHYDRIDE FROM REACTION GASES
DE19939629A1 (en) * 1999-08-20 2001-02-22 Basf Ag Production of pure phthalic anhydride, e.g. for plasticizer production, involves distillation under reduced pressure in a column from which volatiles are taken off at the top and pure anhydride is taken off at a side arm
KR101480945B1 (en) * 2014-04-07 2015-01-14 문재운 Ball valve for leakage protection

Also Published As

Publication number Publication date
DE2313306A1 (en) 1974-09-26
ATA216374A (en) 1975-12-15
JPS49125330A (en) 1974-11-30
AT331783B (en) 1976-08-25
BE812185A (en) 1974-09-12
IT1008994B (en) 1976-11-30

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Legal Events

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