Patent · US Expired

Continuous manufacture of formamide

US4134915A · kind A · utility

0Cited by

3References

5Claims

0Family size

Assignee

BASF SE

Inventors

Heinz Hohenschutz · Mannheim, DE
Max Strohmeyer · Schifferstadt, DE
Manfred Herr · Monsheim, DE
Hans Kiefer · Leopoldshafen, DE

Key dates

Filing date	May 5, 1977
Grant date	Jan 16, 1979
Priority date	—
Expiry date	May 5, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C231/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Formamide is manufactured continuously from methyl formate and gaseous ammonia. The reaction is carried out in a reactor at from 30 to 90.degree. C, from 5 to 20% by volume of the reactor output is drawn off continuously and fed to the formamide working-up stage, and the remainder of the reactor output is cooled, in an external circuit maintained by means of a pump, to from 25 to 60.degree. C and is mixed with the amount of fresh methyl formate required for steady-state operation, after which the appropriate amount of gaseous ammonia is introduced into the stream of liquid through a jet, by the sucking-jet principle, and the stream of liquid is recycled to the reactor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.