GB727867A - Improvements in preparation of maleuric acid - Google Patents

Improvements in preparation of maleuric acid

Info

Publication number
GB727867A
GB727867A GB23244/53A GB2324453A GB727867A GB 727867 A GB727867 A GB 727867A GB 23244/53 A GB23244/53 A GB 23244/53A GB 2324453 A GB2324453 A GB 2324453A GB 727867 A GB727867 A GB 727867A
Authority
GB
United Kingdom
Prior art keywords
acid
urea
maleuric
maleic anhydride
preparation
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
GB23244/53A
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.)
Uniroyal Inc
Original Assignee
United States Rubber Co
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 United States Rubber Co filed Critical United States Rubber Co
Publication of GB727867A publication Critical patent/GB727867A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/18—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas
    • C07C273/1854—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas by reactions not involving the formation of the N-C(O)-N- moiety
    • C07C273/1863—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas by reactions not involving the formation of the N-C(O)-N- moiety from urea

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pyrrole Compounds (AREA)

Abstract

In the preparation of maleuric acid maleic anhydride and urea are reacted in a solvent for both reactants at a temperature in the range from about 20 DEG C. to about 80 DEG C., said solvent consisting in a saturated aliphatic monocarboxylic acid having not more than four carbon atoms. Preferably the maleic anhydride is reacted with urea in the molten liquor from a previous operation. In examples: maleuric acid is obtained by heating maleic anhydride and urea in glacial acetic acid (1) and (5) and batches of maleuric acid are obtained carrying out the reaction in a reaction medium which is the molten liquor from a previous reaction (2)-(4).
GB23244/53A 1952-10-02 1953-08-24 Improvements in preparation of maleuric acid Expired GB727867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US727867XA 1952-10-02 1952-10-02

Publications (1)

Publication Number Publication Date
GB727867A true GB727867A (en) 1955-04-06

Family

ID=22109749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23244/53A Expired GB727867A (en) 1952-10-02 1953-08-24 Improvements in preparation of maleuric acid

Country Status (1)

Country Link
GB (1) GB727867A (en)

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