Process for manufacturing dialkyl carbonate from urea and alcoho

Details Process for manufacturing dialkyl carbonate from urea and alcoho Process for manufacturing dialkyl carbonate from urea and alcoho

1993-12-20

1996-10-15

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

558277, 558260, 549454, 549473, C07C 6996

Patent

active

055656030

ABSTRACT:
A process for making a dialkyl carbonate which comprises reacting urea with a first alcohol in a carbamate reactor at a temperature and pressure sufficient to convert said urea to an alkyl carbamate; and reacting the alkyl carbamate with a second alcohol in the presence of a dialkyl isocyanato alkoxy tin catalyst or derivatives in a carbonate reactor at a temperature and pressure sufficient to convert the alkyl carbamate to a dialkyl carbonate, wherein the molar ratio of alkyl carbamate to second alcohol is in the range between about 2:1 to about 10:1 and wherein dialkyl carbonate is present within the carbonate reactor in an amount between about 1 to about 3 weight %, based on total alkyl carbamate and second alcohol content, and wherein the second alcohol is either the same as or different from the first alcohol or a mixture of alcohols.

REFERENCES:
patent: 2834799 (1958-05-01), Sowa
patent: 4327035 (1982-04-01), Heitz et al.
patent: 4331610 (1982-05-01), Heitz et al.
patent: 4436668 (1984-03-01), Harder et al.
patent: 5001252 (1991-03-01), Bhattacharya
patent: 5003084 (1991-03-01), Su et al.
Windholz, M. The Merck Index (Merck & Co., Rahway), pp. 371-458 (1983).
Kalkote, U. R. et al. Chem. Ed. (London), Issue 12, p. 435 (1991).

Affiliated with

Also associated with

Rating

Process for manufacturing dialkyl carbonate from urea and alcoho does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for manufacturing dialkyl carbonate from urea and alcoho, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing dialkyl carbonate from urea and alcoho will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1247750