Patent · US Expired

Method for the continuous production of tetra-substituted ureas

US7053244B2 · kind B2 · utility

0Cited by

3References

20Claims

0Family size

Assignee

BASF SE

Inventors

Jochem Henkelmann · Mannheim, DE
Theodor Weber · Ludwigshafen, DE
Thorsten Rohde · Mannheim, DE
Ralph Busch · Olney, US

Key dates

Filing date	Jul 3, 2003
Grant date	May 30, 2006
Priority date	—
Expiry date	Jul 3, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C273/1809
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of tetrasubstituted ureas by reaction of the corresponding amines with phosgene in the presence of an aqueous inorganic base at a temperature in the range from 0 to 150° C., which comprises:

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