Method of a high stability selectable hydrogenate catalyst producing and using for DMCHD manufacturing

A method of a high stability selectable hydrogenate catalyst producing and using for DMCHD manufacturing.

• (1) A preparing procedure for Ru/Al2O3 catalyst including:
• a. putting 110 grams Al2O3 into a triple neck bottle in a suction of vacuum;
• b. heating said bottle a temperature of 110° C. for 6 hours
• c. cooling to atmospheric temperature then stopping vacuum;
• d. to add a solution of 4.6 grams Ru/Cl3 into said bottle and heating at a temperature of 60° C.
• e. to dry solution of said solution by vacuum suction;
• and
• f. to heat said bottle in a heater at a temperature of 120° C. for 16 hours to preparation process therefore.
• (2) An activity raising procedure for said catalyst including:
• a. taking the intermediate product of Ru/Al2O3 catalyst out from said bottle which is prepared from step (1), and putting said intermediate product into a stainless steel breeder
• b. to add hydrogen gas into said breeder with a predetermined velocity and heated at a temperature of 450° C. for 2 hours and
• c. cooling to atmospheric temperature and then adding a small quantity of air for passivate the surface of said catalyst so as to get high stability catalyst ready for selectable hydrogenating in a DMCHD manufacturing process therefore.
• (3) A DMCHD manufacturing process which said high stability catalyst is used for a selectable hydrogenating reaction including:
• a. putting said Ru/Al2O3 catalyst onto a fixing bed of a reactor;
• b. to dissolve DMT(dimethyl terephthalate) in to ethyl acetate solution;
• and
• c. guiding DMT solution into said reactor with a predetermined velocity for a selectable hydrogenate reaction to provide a high yield capacity capacity of DMCHD manufacturing in high stability for a long term.