Abstract:
A process for the preparation of lactams which comprises hydrogenating the diammonium salt of an ortho or meta aromatic dicarboxylic acid in the presence of a catalyst combination of Raney cobalt and palladium supported on carbon.
Abstract:
AROMATIC ALDESTERS ARE SEPARATED AND RECOVERED FROM A MIXTURE OF ESTERFIED AROMATIC OXIDATION PRODUCTS BY A PROCESS COMPRISING FORMING WATER SOLUBLE BISULFITE ADDUCTS OF THE ALDEHYDE COMPOUNDS WITH AN ALKALI METAL BISULFITE, EXTRACTING THE ALDEHYDE BISULFITE ADDUCTS WITH WATER, BREAKING THE SEPARATED ADDUCTS WITH AN ACID OR BASE, AND SELECTIVELY SOLVENT EXTRACTING THE ALDESTERS FROM OTHER ALDEHYDE COMPOUNDS.
Abstract:
An improved process for preparing 2-pyrrolidinone at relatively low pressures which comprises reduction of succinimide in an aqueous system at temperatures of about 225* to 275* C., at a pressure in the range of about 1,200 to 1,500 p.s.i.g. and in the presence of a supported palladium catalyst.