This invention relates to a process for the preparation of a pour point depressant or flow improver comprising of subjecting styrene and anhydride as herein described to the step of polymerization as herein described in presence of a catalyst as herein described to obtain a copolymer of styrene anhydride having mole...

This invention relates to a process for the preparation of 1-amino-8-napthol-2, 6-disulphonic acid or H-acid which is a dye intermediate and comprises in the steps of subjecting naphthalene to the step of nitration in a conventional manner in presence of a catalyst platinum, rhodenium or rhodium in a reaction vessel...

"An improved process for the preparation of 4-amino-4-acetylamino-2-sulphonic acid" This invention relates to an improved process for the preparation of 4-amino-4-acetylamino-2-sulphonic acid comprising in the steps of reducing nitroacetanalide in the presence of hydrazine hydrate and nickel as a catalyst at room...