Tin-containing molecular sieve catalyst for hydration of ethylene oxide to prepare ethylene glycol and method of use

Abstract

The invention relates to a tin-containing molecular sieve catalyst used for preparing ethylene glycol by hydrating ethylene oxide and an application method of the tin-containing molecular sieve catalyst. The tin-containing molecular sieve catalyst is prepared by taking H-SSZ-13 zeolite molecular sieve raw powder as a raw material, carrying out water steam treatment or water steam and acid combined treatment on the raw material, and introducing active central metal in a manner of roasting by a vacuum pipe type furnace. The preparation method comprises the following steps: mixing an H-SSZ-13 zeolite molecular sieve treated by the water steam or acid with an organic metal compound precursor at a ratio and roasting in vacuum. According to the tin-containing molecular sieve catalyst, the problems of high water ratio, high energy consumption, environmental pollution caused in a production process and the like in a traditional process can be solved. According to the catalyst, a carrier is cheap and easy to obtain, a preparation process of the catalyst is simple and the stability of the catalyst is good; and the catalyst has excellent catalyzing activity and selectivity when being applied to a process of preparing ethylene glycol by directly hydrating ethylene oxide under a warm condition, is easy to recycle and can be used for industrial production for preparing ethylene glycol by hydrating ethylene oxide.

Description

technical field

[0001] The invention relates to a tin-containing molecular sieve catalyst and a use method thereof. The catalyst can be used for hydration of ethylene oxide to prepare ethylene glycol, and also discloses a use method of the tin-containing molecular sieve catalyst. Background technique

[0002] As an important diol, ethylene glycol is mainly used in the production of polyester resins, including fibers, films and engineering plastics. In addition, ethylene glycol is also commonly used as an indispensable raw material for the production of alkyd resins, adhesives, plasticizers, paints, surfactants, and explosives.

[0003] There are usually two methods for the hydration of ethylene oxide to prepare ethylene glycol: one is the non-catalytic method, which is also the main method used in industry at present, that is, ethylene oxide and water are directly hydrated to generate ethylene glycol without any catalyst. . The biggest disadvantage of this method is that t...

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