FI900106A - FOERFARANDE FOER FRAMSTAELLNING AV SYRAAMID. - Google Patents

FOERFARANDE FOER FRAMSTAELLNING AV SYRAAMID. Download PDF

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Publication number
FI900106A
FI900106A FI900106A FI900106A FI900106A FI 900106 A FI900106 A FI 900106A FI 900106 A FI900106 A FI 900106A FI 900106 A FI900106 A FI 900106A FI 900106 A FI900106 A FI 900106A
Authority
FI
Finland
Prior art keywords
ammonia
ester
reaction
alcohol
fed
Prior art date
Application number
FI900106A
Other languages
Finnish (fi)
Other versions
FI84818B (en
FI900106A0 (en
FI84818C (en
Inventor
Antti Ilmari Vuori
Tapio Mattila
Kari Juhani Hellaemaeki
Kari Veikko Saari
Original Assignee
Kemira Oy
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 Kemira Oy filed Critical Kemira Oy
Priority to FI900106A priority Critical patent/FI84818C/en
Publication of FI900106A0 publication Critical patent/FI900106A0/en
Publication of FI900106A publication Critical patent/FI900106A/en
Publication of FI84818B publication Critical patent/FI84818B/en
Application granted granted Critical
Publication of FI84818C publication Critical patent/FI84818C/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention relates to a process for preparing an acid amide by its reaction between an ester of a corresponding acid and ammonia. The resulting amide is separated from the liquid reaction mixture by crystallization, and alcohol which arises in the reaction is recovered by evaporation. The essential aspect of the invention is that the mother liquor from the amide crystallization step, which mother liquor also contains ammonia left over from the reaction in addition to alcohol, is recirculated in order to be reunited with ester which is fed into the process, with the ammonia content in the mother liquor reacting with the ester, and that a part of the resulting ammonia-free solution is separated for recovering alcohol by means of evaporation at the same time as the remaining part of the solution is reacted with ammonia which is fed into the process. The evaporation residue from the alcohol recovery, which residue principally consists of ester which has been fed into the process, can be returned to the step for feeding in the ester, in associated with which it is used in the reaction with the ammonia. The process is particularly suitable for preparing oxamide from dimethyl oxalate for use as an artificial fertiliser, with the process also producing dry, ammonia-free methanol in addition to oxamide.
FI900106A 1990-01-09 1990-01-09 Process for the preparation of acid amide FI84818C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI900106A FI84818C (en) 1990-01-09 1990-01-09 Process for the preparation of acid amide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI900106 1990-01-09
FI900106A FI84818C (en) 1990-01-09 1990-01-09 Process for the preparation of acid amide

Publications (4)

Publication Number Publication Date
FI900106A0 FI900106A0 (en) 1990-01-09
FI900106A true FI900106A (en) 1991-07-10
FI84818B FI84818B (en) 1991-10-15
FI84818C FI84818C (en) 1992-01-27

Family

ID=8529663

Family Applications (1)

Application Number Title Priority Date Filing Date
FI900106A FI84818C (en) 1990-01-09 1990-01-09 Process for the preparation of acid amide

Country Status (1)

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FI (1) FI84818C (en)

Also Published As

Publication number Publication date
FI84818B (en) 1991-10-15
FI900106A0 (en) 1990-01-09
FI84818C (en) 1992-01-27

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Owner name: KEMIRA OY