Solvent extraction of nitrated organic compounds from...

Details Solvent extraction of nitrated organic compounds from... Solvent extraction of nitrated organic compounds from...

B - Operations, Transporting

01

D

260/503, 260/496

B01D 11/04 (2006.01)

Patent

CA 1194034

Abstract of the Disclosure This invention relates to a process for the separation of a nitrated substance from a spent nitrating acid wherein said nitrated substance contains polar groups selected from the group consisting of -SO3H, -OH, -SH -CO2H, -OSO3H, and -OP(OH)2 and their salts. This is achieved by: (1) diluting the nitrated substance-spent acid solution with water, (2) adding a monohydric alcohol or ketone extraction agent which is immiscible with the spent acid, (3) permitting the mixture to separate into layers of different densities one of said layers comprising said nitrated substance dissolved in said extracting agent, (4) removing said nitrated substance-extracting agent layer, (5) separating the nitrated substance from the extracting agent layer, and (6) reducing the nitrated substance to an amine.

415119

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