METHOD FOR PREPARING ETHYLENE OXIDE CATALYST CARRIER BY USING WASTE CATALYST

WIPO Patent Application WO/2024/037242

A1

A method for preparing an ethylene oxide catalyst carrier by using a waste catalyst, comprising: drying alumina recovered from a waste catalyst, and grinding same to 5-100 μm; mixing 0.5-3.5 parts by weight of alumina, 1-4 parts by weight of gibbsite, and 1-4 parts by weight of AlO(OH) as a raw material, adding an auxiliary agent, and carrying out compression molding to obtain a carrier precursor; and carrying out high-temperature roasting and shaping on the carrier precursor at 1,200-1,500°C to obtain an α-alumina porous carrier. The α-alumina porous carrier has a large water absorption rate, high compression resistance, and large pore volume, and can be further used for preparing ethylene oxide catalysts having excellent catalytic activity. According to the method, waste catalysts are utilized, natural resources are saved, and production costs are reduced; moreover, the problem of environmental pollution caused by inappropriate storage of residual alumina after recovering precious metals from waste catalysts can also be avoided.

ZHUO RUNSHENG (CN)
LIU JUNJU (CN)
WANG HONGFEI (CN)
XU LIQIAN (CN)
ZHANG PING (CN)
ZHUO LILIANG (CN)

PCT/CN2023/106175

February 22, 2024

July 06, 2023

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REZEL CATALYSTS CORP (CN)

B01J32/00; B01J21/04

CN115254080A	2022-11-01
CN111375437A	2020-07-07
CN106955745A	2017-07-18
CN111375397A	2020-07-07
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CN109201027A	2019-01-15
CN111821993A	2020-10-27
JP2015199060A	2015-11-12
US20120051988A1	2012-03-01
US4960573A	1990-10-02

CHENGDU DINGFENG PATENT AGENCY (GENERAL PARTNER) (CN)

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