Process for the preparation and use of organic antimony cracking catalysts.

摘要

Antimony tricarboxylates of higher carboxylic acids and suitable for use in the passivation of metal contaminants which interfere with the functioning of zeolite-containing hydrocarbon cracking catalysts in a hydrocarbon cracking process, can be prepared in high yields by (a) reacting antimony oxide with an anhydride of a lower organic acid, (b) reacting the product from (a) with at least one higher carboxylic acid at a temperature sufficient to vaporise volatile material and removing the vaporised volatile material, (c) optionally simultaneously passing a stream of an inert gas through the reaction mixture. and (d) recovering the antimony tricarboxylate of said higher carboxylic acid.