GB798456A - Maleic anhydride recovery - Google Patents

Maleic anhydride recovery

Info

Publication number
GB798456A
GB798456A GB1325756A GB1325756A GB798456A GB 798456 A GB798456 A GB 798456A GB 1325756 A GB1325756 A GB 1325756A GB 1325756 A GB1325756 A GB 1325756A GB 798456 A GB798456 A GB 798456A
Authority
GB
United Kingdom
Prior art keywords
maleic anhydride
maleic acid
acid solution
gases
gas stream
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
GB1325756A
Inventor
Alun Angus Jones
Cyril John Lakin
Mario Serrano
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals Ltd
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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB1325756A priority Critical patent/GB798456A/en
Publication of GB798456A publication Critical patent/GB798456A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54Preparation of carboxylic acid anhydrides
    • C07C51/573Separation; 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)

Abstract

Maleic anhydride is recovered from gases obtained by the vapour phase catalytic oxidation of organic compounds by injecting continuously into the hot gas stream a solution containing 35-75, preferably 50-65 per cent by weight of maleic acid, cooling the vapours to condense maleic anhydride but not water, usually at 60-100, preferably 70-80 DEG C., scrubbing the remaining vapours with a 35-75 per cent maleic acid solution to remove uncondensed maleic anhydride, and recycling the maleic acid solution for injection into the hot gas stream. The hot gases are preferably at a temperature of 200-300 DEG C. before injection of maleic acid solution; the latter is preferably formed and recycled at a temperature of 35-90 DEG C., more preferably at 50-70 DEG C. In an example, the gases from the oxidation of benzene with air at 435 DEG C. are cooled to 245 DEG C. and treated as above.
GB1325756A 1956-04-30 1956-04-30 Maleic anhydride recovery Expired GB798456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1325756A GB798456A (en) 1956-04-30 1956-04-30 Maleic anhydride recovery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1325756A GB798456A (en) 1956-04-30 1956-04-30 Maleic anhydride recovery

Publications (1)

Publication Number Publication Date
GB798456A true GB798456A (en) 1958-07-23

Family

ID=10019677

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1325756A Expired GB798456A (en) 1956-04-30 1956-04-30 Maleic anhydride recovery

Country Status (1)

Country Link
GB (1) GB798456A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216867B (en) * 1962-01-02 1966-05-18 Harpener Bergbau Ag Process for the production of maleic anhydride from the gases produced by the oxidation of benzene
US5585502A (en) * 1993-02-08 1996-12-17 Sisas Societa' Italiana Serie Acetica E Sintetica Spa Process and plant for the purification of raw maleic anhydride recovered from gaseous reaction mixtures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216867B (en) * 1962-01-02 1966-05-18 Harpener Bergbau Ag Process for the production of maleic anhydride from the gases produced by the oxidation of benzene
US5585502A (en) * 1993-02-08 1996-12-17 Sisas Societa' Italiana Serie Acetica E Sintetica Spa Process and plant for the purification of raw maleic anhydride recovered from gaseous reaction mixtures

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