Patent ID: 8835670

Claim:
A method for synthesis of lactic acid and its derivatives, comprising: providing a mixture, comprising: at least one carbohydrate-containing raw material, at least one alcohol, at least one composite catalyst containing metal chloride(s) (MCln) and tin-containing compound(s), and at least one solvent, wherein M is selected from a group consisting of Li + , Na + K + , Mg 2+ , Ca 2+ , Sr 2+ , Ga 3+ , In 3+ , Sb 3+ , Bi 3+ , Cr 3+ , Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Zn 2+ , and n represents 1, 2 or 3, and the at least one solvent comprises the methyl esters of C8 to C22 fatty acids; and heating the mixture to obtain lactic acid and its derivatives.