Metal silicate catalyst regeneration

Abstract

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...

Examples

example

[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.

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...

Examples

example

[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.

Images