US 2020/0024227 A1 · INTEGRATED PROCESS FOR PRODUCTION OF GLYCEROL CARBONATE (4-HYDROXYMETHYL-2-OXO-1, 3-DIOXOLANE) AND UREA

Abstract

Systems and methods for integrated glycerol carbonate and/or urea production. This disclosure pertains to development of a process for production of glycerol carbonate and/or urea from ammonia, carbon dioxide and glycerol. The process integrates glycerol carbonate production into a urea production process. The urea produced in the production facility may be used to produce glycerol carbonate by reacting urea with glycerol. The ammonia generated by glycerol carbonate production may be recycled back to urea production. Unreacted urea from the glycerol carbonate production may be separated and recycled to the urea product stream. The systems and methods can reduce the cost for urea production and increase product value of the excessive glycerol produced from other chemical plants.

Claims20

Dependent claims

A method of producing glycerol carbonate and/or urea, the method comprising steps as follows:

(1) employing carbon dioxide and ammonia in synthesizing the urea;
(2) reacting at least some of the urea with glycerol to form glycerol carbamate and ammonia;
(3) decomposing the glycerol carbamate to form the glycerol carbonate and ammonia;
(4) feeding at least some of the ammonia from step (2) and/or step (3) to step (1) for the synthesizing;
(5) transferring any unreacted urea from step (2) to a urea product stream;
and
(6) flowing the glycerol carbonate from step (3) in a glycerol carbonate product stream.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/496,497Filed 7 Mar 2018

Priority

11 Apr 2017

Published

23 Jan 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

C07C 273/04
Of urea, its salts, complexes or addition compounds: from carbon dioxide and ammonia
C01C 1/086
Preparation of ammonia from nitrogenous organic substances: from urea
C07C 269/00
Preparation of derivatives of carbamic acid, i.e. compounds containing any of the
C07C 273/14
Of urea, its salts, complexes or addition compounds: separation; Purification; Stabilisation; Use of additives

Integrated process for production of glycerol carbonate (4-hydroxymethyl-2-oxo-1, 3-dioxolane) and urea

Life of this patent

Integrated process for production of glycerol carbonate (4-hydroxymethyl-2-oxo-1, 3-dioxolane) and urea

Life of this patent

Abstract

Claims20