Ammonia → Ammonia

A process adapted for producing free-flowing ammonium carbamate having an average particle size between about 2-10 microns, and having a purity of substantially 100 percent, which process comprises (1) injecting a pressurized stream of anhydrous liquid carbon dioxide into a moisture-free environment, wherein adiabatic expansion decreases the temperature of the carbon dioxide into the range between about 10° F. and -110° F.; and (2) contacting the adiabatically expanding carbon dioxide with a stream of anhydrous liquid ammonia to form particualate ammonium carbamate, wherein the molar ratio of carbon dioxide to ammonia in the contacting zone is between about 1.5-5:1, and the temperature in the contacting zone is maintained in the range between about 70° F. and 120° F., and wherein said liquid ammonia is injected into the approximate center of said stream of carbon dioxide in order to increase mixing.

1. custominto the range between about 10° F. and -110° F.

ORD record

ord-fc248a487cfc4ee6970b6fcc1ff3f42b

Source dataset

uspto-grants-1983_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04420635