GB858622A - Refining of maleic anhydride - Google Patents

Refining of maleic anhydride

Info

Publication number
GB858622A
GB858622A GB21273/59A GB2127359A GB858622A GB 858622 A GB858622 A GB 858622A GB 21273/59 A GB21273/59 A GB 21273/59A GB 2127359 A GB2127359 A GB 2127359A GB 858622 A GB858622 A GB 858622A
Authority
GB
United Kingdom
Prior art keywords
maleic anhydride
refining
sodium perborate
crude maleic
crude
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
GB21273/59A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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 Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA filed Critical Montedison SpA
Publication of GB858622A publication Critical patent/GB858622A/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)
  • Furan Compounds (AREA)

Abstract

Crude maleic anhydride (e.g. from the catalytic oxidation of materials such as benzene, butene and crotonaldehyde) is purified by treating it in the liquid state with sodium perborate and subsequently recovering the maleic anhydride by distillation. The sodium perborate may be used in the form NaBO34H2O, e.g. in amount 0,1-1,5% by weight of crude maleic anhydride. The latter is preferably molten, at at least 55 DEG C. The process may be carried out in two stages, the second under reflux conditions, preferably under reduced pressure.
GB21273/59A 1958-06-27 1959-06-22 Refining of maleic anhydride Expired GB858622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT858622X 1958-06-27

Publications (1)

Publication Number Publication Date
GB858622A true GB858622A (en) 1961-01-11

Family

ID=11329816

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21273/59A Expired GB858622A (en) 1958-06-27 1959-06-22 Refining of maleic anhydride

Country Status (1)

Country Link
GB (1) GB858622A (en)

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