Abstract: Disclosed is a process for the preparation of dialkyl aromatic hydroxyl compounds such as dialkylphenols, dialkylbenzenediols, dialkylnaphthols and dialkylnaphthalenediols, especially 2,5-dialkylhydroquinone, by contacting an aromatic hydroxy compound with an olefin in the presence of a sulfonic acid and sulfuric acid.

Abstract: Disclosed is an improved process for preparing 1-chloro-2,4-diaminobenzene by the selective hydrogenation of 1-chloro-2,4-dinitro-benzene wherein the hydrogenation is carried out in the presence of a modified Raney nickel catalyst containing about 70 to 95 weight percent nickel, about 4 to 10 weight percent aluminum, about 0.1 to 4 weight percent molybdenum, and from 0 to about 20 weight percent cobalt. The 1-chloro-2,4-diaminobenzene is useful as an intermediate for disperse dyes and for color photography.

Abstract: The present invention provides a process for preparing N-(3-amino-4-chlorophenyl) acylamides of Formula I: ##STR1## comprising reacting, in a solvent comprising at least one polar solvent, in the presence of at least one acid acceptor, 1-chloro-2,4-diaminobenzene with at least one acyl chloride of formula I:Cl--X--Rwherein X is --CO-- or --SO.sub.2 --; R is selected from the group C.sub.1 -C.sub.25 alkyl; C.sub.1 -C.sub.25 alkyl substituted with one or more groups selected from C.sub.1 -C.sub.12 alkoxy, aryl, aryloxy and C.sub.5 -C.sub.7 cycloalkyl; aryl; C.sub.5 -C.sub.7 cycloalkyl. The present invention further comprises the step of purifying said N-(3-amino-4-chlorophenyl) acylamides by crystallizing from a non-polar solvent or conducting the reaction in a mixture of at least one polar and at least one non-polar solvent.