Metal silicate catalyst regeneration
A metal silicate, catalyst technology, applied in catalyst regeneration/reactivation, molecular sieve catalyst, physical/chemical process catalyst, etc., can solve the problems of equipment required, expensive repetition, etc., to achieve excellent productivity, energy cost saving, excellent single The effect of alkyl ether selectivity
Pending Publication Date: 2022-04-12
DOW GLOBAL TECH LLC
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- Application Information
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Problems solved by technology
Necessary repetition of conventional regeneration processes is expensive and requires specialized equipment
Method used
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[0046] Material
[0047] The catalyst is a metallosilicate catalyst defined by the BEA structure and has a silica to alumina ratio of 25:1 and a 680m 2 surface area per gram, which is available as the CP814E from ZEOLYST INTERNATIONAL of Conshohocken, PA TM Commercially available.
[0048] The olefin is 1-dodecene alpha olefin which is available as NEODENE TM 12 Shell T from The Hague, Netherlands M Commercially available from the group.
[0049] Monoethylene glycol was purchased from Sigma Aldrich (SIGMAALDRICH) TM The liquid anhydrous ethylene glycol, its CAS number is 107-21-1.
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According to at least one feature of the present disclosure, a method comprises the steps of: (a) providing a metal silicate catalyst that has been used to catalyze a chemical reaction; and (b) heating the metal silicate catalyst to a temperature of 200 DEG C to 425 DEG C for a period of 0.5 hours to 5 hours.
Description
technical field [0001] The present disclosure relates generally to metal silicate catalysts, and more particularly to the regeneration of metal silicate catalysts. Background technique [0002] The production of secondary alcohol ethoxylate surfactants can be carried out by catalytic ethoxylation of (poly)alkylene glycol monoalkyl ethers ("monoalkyl ethers"). Monoalkyl ethers are formed from olefins and (poly)alkylene glycols using crystalline metallosilicate catalysts ("metallosilicate catalysts"). Metallosilicate catalysts provide greater than 80% selectivity to monoalkyl ethers at greater than 5% conversion of olefins, which is advantageous because (poly)alkylene glycol dialkyl ethers ("dialkyl ethers") ”) are detrimental to the properties of secondary alcohol ethoxylate surfactants. [0003] Despite greater than 80% selectivity to monoalkyl ethers, metallosilicate catalysts foul quickly, resulting in short pot life, low monoalkylether productivity, and the need for rep...
Claims
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IPC IPC(8): B01J38/02B01J29/90C07C41/06C07C43/13C07C43/11
CPCB01J29/90B01J38/02C07C41/05Y02P20/584C07C43/13B01J29/7007C07C41/06
Inventor W-S·李俞明哲T·H·彼得森S-Y·谷余旺林王乐S·W·金
Owner DOW GLOBAL TECH LLC