GB946724A - Production of pure maleic anhydride - Google Patents

Production of pure maleic anhydride

Info

Publication number
GB946724A
GB946724A GB8535/62A GB853562A GB946724A GB 946724 A GB946724 A GB 946724A GB 8535/62 A GB8535/62 A GB 8535/62A GB 853562 A GB853562 A GB 853562A GB 946724 A GB946724 A GB 946724A
Authority
GB
United Kingdom
Prior art keywords
anhydride
maleic anhydride
vapours
maleic
condensation zone
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
GB8535/62A
Inventor
Wilhelm Friedrichsen
Hans Joachim Stephan
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 GB946724A publication Critical patent/GB946724A/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
    • 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
    • C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C57/00—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms
    • C07C57/02—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms with only carbon-to-carbon double bonds as unsaturation
    • C07C57/13—Dicarboxylic acids
    • C07C57/145—Maleic acid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/60—Two oxygen atoms, e.g. succinic anhydride

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, 99.7 to 99.8% pure and free from fumaric acid, is produced by introducing maleic acid, or an aqueous solution or suspension containing at least 50% by weight thereof, into maleic anhydride boiling at atmospheric or reduced pressure thereby vaporizing maleic <PICT:0946724/C2/1> anhydride and water; cooling the vapours by 3 to 30 DEG C., preferably 5 to 20 DEG C., but not below 100 DEG C., in a first condensation zone; removing the condensed maleic anhydride; cooling the remaining vapours to 30 DEG to 80 DEG C. below that of the first condensation zone, but not below the dew point of water vapour at the prevailing pressure and not below 53 DEG C.; returning the condensate to the vaporizing mixture and condensing the water vapour leaving the second condensation zone. In a specific embodiment maleic acid, or an aqueous solution or suspension thereof, is passed from vessel 1 into vaporizer 2 which contains boiling maleic anhydride at 110 DEG to 200 DEG C. and 50 to 760 mm.Hg., being preferably 115 DEG to 140 DEG C. at 90 to 150 mm. Hg. It is convenient to maintain an amount of anhydride, advantageously 70 to 95% by weight of the contents of the vessel, in 2 such that the mixture remains homogeneously liquid and to introduce the maleic acid into 2.3 to 17 times its own weight of anhydride. The vapours are passed through column 3, maintained at the same temperature as 2, into the first condensation zone 4, where they are cooled by 3 to 30 DEG C. to condense part of the anhydride (approx. 15 to 35%) contained therein, which is collected in pure form in vessel 5. The remaining vapours are cooled in the second condensation zone (6) to such a temperature that the bulk of anyhdride is separated in lquid form but the water vapour remains substantially uncondensed. The condensate from 6 is passed via pipe 7 and column 3 to the vaporizing mixture in 2 and the residual vapours are condensed in column 8, collected in vessel 9 and may be used for washing maleic anhydride gases from the combustion products of benzene. The ratio between maleic anhydride condensed in the first zone to that in the second, controlled by the temperature of the two zones, is 1:6 to 1:1. Examples are given.
GB8535/62A 1961-03-07 1962-03-06 Production of pure maleic anhydride Expired GB946724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB61549A DE1194838B (en) 1961-03-07 1961-03-07 Process for the production of pure maleic anhydride free of fumaric acid from maleic acid or its aqueous solutions

Publications (1)

Publication Number Publication Date
GB946724A true GB946724A (en) 1964-01-15

Family

ID=6973233

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8535/62A Expired GB946724A (en) 1961-03-07 1962-03-06 Production of pure maleic anhydride

Country Status (2)

Country Link
DE (1) DE1194838B (en)
GB (1) GB946724A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1424747A (en) * 1973-08-28 1976-02-11 Ucb Sa Method and apparatus for the continuous dehydration of maleic acid

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966853A (en) * 1934-02-03 1934-07-17 Mensanto Chemical Company Manufacture of maleic anhydride from crude maleic acid
US2211160A (en) * 1937-02-05 1940-08-13 Nat Aniline & Chem Co Inc Process of recovering maleic anhydride
US2215070A (en) * 1938-05-11 1940-09-17 Hercules Powder Co Ltd Method for the production of maleic anhydride
US2250091A (en) * 1939-03-27 1941-07-22 Solvay Process Co Dehydration of maleic acid
GB645233A (en) * 1947-06-16 1950-10-25 Du Pont Recovery of maleic or phthalic anhydride from process gases
US2518312A (en) * 1947-06-16 1950-08-08 Du Pont Recovery of maleic or phthalic anhydride from wet process gas mixtures
US2574644A (en) * 1948-07-06 1951-11-13 Chempatents Inc Recovery of polycarboxylic acid anhydrides
US2729599A (en) * 1948-08-02 1956-01-03 Exxon Research Engineering Co Dehydration of maleic acid to anhydride
GB695958A (en) * 1949-06-29 1953-08-19 Monsanto Chemicals Improvements in or relating to dehydration of maleic acid to maleic anhydride
US2670355A (en) * 1950-02-23 1954-02-23 Barsky Manufacture of maleic anhydride
US2729600A (en) * 1951-08-29 1956-01-03 Exxon Research Engineering Co Azeotropic dehydration of maleic acid to anhydride
US2688622A (en) * 1951-09-21 1954-09-07 American Cyanamid Co Process for producing maleic anhydride
US2696489A (en) * 1953-06-16 1954-12-07 Monsanto Chemicals Dehydration of maleic acid
DE1015792B (en) * 1955-01-12 1957-09-19 Basf Ag Process for the separation of maleic anhydride from gases containing such
DE1021356B (en) * 1955-01-13 1957-12-27 Basf Ag Process for the production of maleic anhydride from gases containing such
BE547126A (en) * 1955-04-20 1959-10-23 Montedison Spa PROCESS FOR SEPARATING CRYSTALLINE AND PURE MALEIC ANHYDRIDE DIRECTLY FROM GAS AND WATER VAPOR MIXTURES CONTAINING IT.
US2803311A (en) * 1955-04-20 1957-08-20 Montedison Spa Process for separating pure, crystalline maleic anhydride directly from gaseous mixtures containing same
FR1149595A (en) * 1955-05-09 1957-12-27 California Spray Chemical Corp Process for the continuous dehydration of aqueous solutions of crude maleic acid

Also Published As

Publication number Publication date
DE1194838B (en) 1965-06-16

Similar Documents

Publication Publication Date Title
US3294650A (en) Process for concentrating sulfuric acid in a quartz rectifying column
US3192128A (en) Process for purifying aqueous hydrochloric acid
GB703065A (en) Improvements in or relating to the dehydration of hydrazine by azeotropic distillation
GB922775A (en) Process for separating higher hydrocarbons from gas mixtures containing acetylene and/or ethylene
SU486506A3 (en) The method of producing acetone cyanohydrin
GB946724A (en) Production of pure maleic anhydride
US2211160A (en) Process of recovering maleic anhydride
ES375942A1 (en) Continuous process for the preparation of maleic anhydride from an aqueous solution of maleic acid by distillation
US2438252A (en) Purification of hydrogen peroxide by a nonconcentrating distillation
GB974164A (en) Production of epichlorohydrin
US1733721A (en) Carnie b
US4804442A (en) Ultrapure hydrazine production
GB901079A (en) Purifying furfural
GB987336A (en) Method of evaporating aluminium trihalide
US5035775A (en) Ultrapure hydrazine production
GB1009574A (en) Process for the separation of hydrogen chloride gas from a gas mixture obtained in the catalytic oxidation of hydrogen chloride gas with a molecular oxygen-containing gas
US3041251A (en) Process for the purification of maleic anhydride
US2862854A (en) Purification of acetic acid employing hydroxylamine acetate as purifying agent
US2139721A (en) Concentration of nitric acid
US1738625A (en) Concentration and distillation of solutions of hydrogen peroxide
US2598684A (en) Pine gum distillation
GB573631A (en) Manufacture of butadiene
GB737391A (en) Improvements relating to the production of maleic anhydride
US3232705A (en) Production of pure concentrated sulfuric acid
US2860035A (en) Production of highly concentrated nitric acid