GB932827A - Improvements in or relating to the manufacture of dimethylformamide - Google Patents

Improvements in or relating to the manufacture of dimethylformamide

Info

Publication number
GB932827A
GB932827A GB2077861A GB2077861A GB932827A GB 932827 A GB932827 A GB 932827A GB 2077861 A GB2077861 A GB 2077861A GB 2077861 A GB2077861 A GB 2077861A GB 932827 A GB932827 A GB 932827A
Authority
GB
United Kingdom
Prior art keywords
dimethylamine
sulphate
dimethylformamide
water
calcium formate
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
GB2077861A
Inventor
George Reid Campbell
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB2077861A priority Critical patent/GB932827A/en
Publication of GB932827A publication Critical patent/GB932827A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C233/00—Carboxylic acid amides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Dimethylformamide is produced by mixing calcium formate with an aqueous solution of dimethylamine sulphate, removing the calcium sulphate formed, and heating to distil off the water and cause amide formation. The reactants are preferably mixed in stoichiometrically equivalent quantities, the dimethylamine sulphate being obtained by absorbing dimethylamine in dilute sulphuric acid. The product is recovered mainly from the distillation residue, but also from the aqueous distillate. The amount of water in the system may be from 200 to 300 grams per gram molecule of calcium formate used.
GB2077861A 1961-06-08 1961-06-08 Improvements in or relating to the manufacture of dimethylformamide Expired GB932827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2077861A GB932827A (en) 1961-06-08 1961-06-08 Improvements in or relating to the manufacture of dimethylformamide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2077861A GB932827A (en) 1961-06-08 1961-06-08 Improvements in or relating to the manufacture of dimethylformamide

Publications (1)

Publication Number Publication Date
GB932827A true GB932827A (en) 1963-07-31

Family

ID=10151534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2077861A Expired GB932827A (en) 1961-06-08 1961-06-08 Improvements in or relating to the manufacture of dimethylformamide

Country Status (1)

Country Link
GB (1) GB932827A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467580A (en) * 1965-08-12 1969-09-16 Raffinage Cie Franc De Alkylamide-water distillation and amine neutralization of acid formed
CN105936624A (en) * 2016-04-28 2016-09-14 徐真华 Method for crystallizing dimethylamine sulfate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467580A (en) * 1965-08-12 1969-09-16 Raffinage Cie Franc De Alkylamide-water distillation and amine neutralization of acid formed
CN105936624A (en) * 2016-04-28 2016-09-14 徐真华 Method for crystallizing dimethylamine sulfate

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