Title:
【発明の名称】オキサミドの製造法
Document Type and Number:
Japanese Patent JP2547127
Kind Code:
B2
Abstract:
Oxamide is produced in a high purity by a process comprising (A) melting a starting material comprising 70 to 100wt% of an oxalic acid diester of an aliphatic alcohol and 0 to 30wt% of the same aliphatic alcohol as mentioned above, (B) feed-mixing an ammonia-containing gas to the starting material melt, while stirring, to produce oxamide and the aliphatic alcohol (by-product), (C) continuing the ammonia-feed-mixing procedure while controlling a feed rate of ammonia to an extent such that a content of the aliphatic alcohol in the reaction mixture is maintained at a level of 3 to 45% by weight, to produce a wetted solid reaction product comprising the resultant oxamide and the aliphatic alcohol, and then (D) collecting the oxamide from the reaction product by evaporating away the aliphatic alcohol.
Inventors:
YAMAKI TOMOHIKO
INABA YUKIO
KOGA GENJI
NOGUCHI HIDETAKA
FUNATSU JOJI
INABA YUKIO
KOGA GENJI
NOGUCHI HIDETAKA
FUNATSU JOJI
Application Number:
JP12883491A
Publication Date:
October 23, 1996
Filing Date:
March 15, 1991
Export Citation:
Assignee:
UBE INDUSTRIES
International Classes:
C07C231/02; C07C233/56; (IPC1-7): C07C233/56; C07C231/02
Domestic Patent References:
| JP527916A |
Other References:
【文献】国際公開91/10643(WO,A)