GB1330060A - Production of maleic anhydride - Google Patents

Production of maleic anhydride

Info

Publication number
GB1330060A
GB1330060A GB2267171A GB2267171A GB1330060A GB 1330060 A GB1330060 A GB 1330060A GB 2267171 A GB2267171 A GB 2267171A GB 2267171 A GB2267171 A GB 2267171A GB 1330060 A GB1330060 A GB 1330060A
Authority
GB
United Kingdom
Prior art keywords
maleic anhydride
weight
temperature
reactor
effected
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
GB2267171A
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
Badische Anilin and Sodafabrik 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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1330060A publication Critical patent/GB1330060A/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
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
    • C07C51/313—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with molecular oxygen

Abstract

1330060 Maleic anhydride BADISCHE ANILIN- & SODA-FABRIK AG 19 April 1971 [28 Feb 1970] 22671/71 Heading C2C Maleic anhydride is prepared by adding benzene to air which has been heated to a temperature of from 100‹ to 200‹ C. and passing the resulting gas mixture to a tubular reactor containing a catalyst consisting of 45 to 90% by weight of TiO 2 , from 0À2 to 20% by weight of V 2 O 5 , from 8 to 30% by weight of MoO 3 and from 1 to 20% by weight of P 2 O 5 , maintaining a temperature of from 380‹ to 450‹ C. in the interior of the tubes, heat exchange being effected by means of a salt bath kept at from 355‹ to 370‹ C. which is recycled through the reactor by entering and leaving uniformly from all directions through an annular duct, the reaction gas leaving the reactor being cooled to a temperature of from 160‹ to 180‹ C. and then fed to a scrubbing tower in which the maleic anhydride is scrubbed out by means of a recycled cooled aqueous maleic acid solution, the recovered 30 to 50% maleic acid solution being concentrated to more than 90% in a falling film evaporator or a succession thereof, the concentrate being split in another falling film evaporator into maleic anhydride vapour and steam, the removal of the water of reaction being effected without any inert entrainer directly by the maleic anhydride vapour, the crude maleic anhydride obtained by fractional condensation being continuously distilled.
GB2267171A 1970-02-28 1971-04-19 Production of maleic anhydride Expired GB1330060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702009503 DE2009503A1 (en) 1970-02-28 1970-02-28

Publications (1)

Publication Number Publication Date
GB1330060A true GB1330060A (en) 1973-09-12

Family

ID=5763683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2267171A Expired GB1330060A (en) 1970-02-28 1971-04-19 Production of maleic anhydride

Country Status (5)

Country Link
AT (1) AT303697B (en)
BE (1) BE763495A (en)
DE (1) DE2009503A1 (en)
FR (1) FR2079049A5 (en)
GB (1) GB1330060A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN141298B (en) * 1973-10-23 1977-02-12 Halcon International Inc
DE102005031465A1 (en) * 2005-07-04 2007-01-11 Basf Ag Process for starting up oxidation catalysts

Also Published As

Publication number Publication date
DE2009503A1 (en) 1971-09-09
AT303697B (en) 1972-12-11
FR2079049A5 (en) 1971-11-05
BE763495A (en) 1971-08-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees