Amination process
AssigneePhillips Petroleum Company
InventorTod K. Shioyama
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Abstract
The distillation of 2,2'bis(4-aminocyclohexyl)propane to yield high purity product is effectively carried out using high boiling organic solvents.
Claims7
A process of recovering at least one high purity amine-substituted cyclic compound selected from the group consisting of bis(4-aminophenyl) methane, 2,2'-bis(3-aminophenyl) ethane, bis(4-aminocyclohexyl) methane, and 2,2'-bis(4-aminocyclohexyl) propane from a material containing such a compound in the presence of one or more monoamine homologs in quantities of about 5 percent or greater comprising
- (a) mixing at least one high boiling solvent with the material, and
- (b) distilling the mixture under suitable conditions to recover the amine-substituted compound.
In a process for the fractional distillation of 2,2'-bis(4-aminocyclohexyl)propane from a solvent solution thereof, the improvement wherein the solvent is selected from the group consisting of dodecane, tetradecane, pentadecane, hexadecane, decahydronaphthalene, tetrahydronaphthalene, cyclohexylamine, and mixtures thereof.
Dependencies are inferred from the claim text.