COPPER-ZINC-ALUMINUM CATALYST PREPARATION PROCESS (OPTIONS) Russian patent published in 2006 - IPC B01J21/02 B01J23/80 B01J37/04 

FIELD: various-destination catalysts.

SUBSTANCE: invention relates to production of copper-zinc-aluminum catalysts appropriate for low-temperature steam conversion of carbon monoxide, low-temperature methanol synthesis, and hydrogenation-dehydrogenation of various organic compounds. Catalyst preparation process comprises preparing ammonia-carbonate solutions of copper and zinc, treating aluminum-containing raw material with ammonia-carbonate solution of zinc, mixing thus treated or its mixture with untreated aluminum-containing raw material with copper and zinc compounds, holding resulting suspension in reactor at elevated temperature and stirring, separating formed catalyst mass from solution, drying, calcination, and granulation. Specifically, treatment of aluminum-containing raw material with ammonia-carbonate solution of zinc is carried out at 75-90°C and is followed by ageing at stirring until ammonia-carbonate solution of zinc is decomposed and mixing of copper, zinc, and aluminum-containing raw material is conducted in dosed manner while maintaining reactor temperature 75-90°C and specified copper-to-zinc ratio in liquid phase of suspension. Moreover, zinc compounds are introduced into reactor in the form of ammonia-carbonate solution or oxide, or basic carbonate and copper compound in the form of ammonia-carbonate solution so that copper-to-zinc atomic ratio in finished catalyst is (0.55-2.2):1 and atomic content of aluminum ranges from 2.6 to 10.6.

EFFECT: simplified catalyst preparation technology, avoided noxious effluents and gas emissions, and assured preparation of high-activity, stable, and strong catalysts.

3 cl, 1 tbl, 16 ex