Patent ID: 9090804
Filing Date: 2015-07-28
Classification: C07C,C08G,C08L,C09J,Y10T

Abstract:
1. A method of preparing a mixture of at least two diisocyanates comprising: (a) providing a protein source comprising or derived from soy protein, corn, rice bran, or oil seeds; (b) processing the protein source to generate a product comprising a biodiesel biofuel and a water/glycerin fraction comprising a mixture of alkyl esters comprising diamino alkyl esters and monofunctionalized alkyl esters; (c) separating from the water/glycerin fraction the monofunctionalized alkyl esters to generate a product comprising diamino alkyl esters, and (d) reacting the separated mixture of diamino alkyl esters of step (c) with an excess of a phosgene to generate a mixture of diisocyanate derivatives of Formula II wherein R is an alkyl, and n=1−4 wherein the reaction to generate a mixture of diisocyanate derivatives from the mixture of diamino alkyl esters comprises conditions of temperatures between about 50 to 200° F. and pressures of between 1 to 10 bar.