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Method for regenerating catalysts for olefin esterification reaction and hydration reaction

A technology of hydration reaction and catalyst, which is applied in the chemical industry to achieve the effect of simple regeneration process, easy recovery and easy operation

Inactive Publication Date: 2014-08-27
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through analysis and research, it is known that the main reason for the deactivation of the catalyst is that the polymer generated during the reaction and the water in the reaction solution cover the active center of the catalyst, so that the reactant cannot contact the acid exchange center H of the resin. +

Method used

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  • Method for regenerating catalysts for olefin esterification reaction and hydration reaction
  • Method for regenerating catalysts for olefin esterification reaction and hydration reaction
  • Method for regenerating catalysts for olefin esterification reaction and hydration reaction

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 20g of the CT800 deactivated catalyst, weigh 50g of acetic acid, pour it into a 150ml beaker, control the solvent immersion temperature at 35°C, and the immersion time for 60h. The solution was poured into a Buchner funnel, the catalyst was separated by suction filtration, and the solvent was recovered for reuse next time. The catalyst was washed with distilled water until the pH of the washing water was neutral. Put the catalyst into a watch glass, put the watch glass into an oven, the drying temperature is 100°C, and the drying time is 24 hours.

[0025] In a batch reactor, under the same reaction conditions (reaction temperature 40°C, stirring speed 400rpm, molar ratio of alkene to acid 1:1.1, catalyst dosage 10% of the mass of the reaction liquid), the catalyst was studied in the esterification of camphene to prepare acetic acid iso Catalytic activity in the borneol ester reaction, the regenerated CT800 catalyst was compared with the fresh catalyst, and the r...

Embodiment 2

[0030] Weigh 20g of the NKC-9 deactivated catalyst, weigh 60g of ethanol, pour it into a 150ml beaker, control the solvent immersion temperature at 25°C, and the immersion time for 48h. The solution was poured into a Buchner funnel, the catalyst was separated by suction filtration, and the solvent was recovered for reuse next time. The catalyst was washed with distilled water until the pH of the washing water was neutral. Put the catalyst into a watch glass, put the watch glass into an oven, the drying temperature is 85°C, and the drying time is 36 hours.

[0031] The specific surface area, pore volume and ion exchange capacity of the regenerated NKC-9 catalyst were measured, and the measured values ​​were close to those of the new catalyst, as shown in Table 2.

[0032] Table 2 The specific surface area, pore volume and ion exchange capacity of the catalyst

[0033]

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Abstract

The invention provides a method for regenerating catalysts for an olefin esterification reaction and a hydration reaction. Polymer adsorbed at the active center positions of the surfaces of the catalysts is leached and washed through organic solvents, the organic solvents for leaching is washed through distilled water, and the adsorbed water is removed through drying. The obtained regenerated catalysts can replace new catalysts to be supplemented to the olefin esterification reaction and the hydration reaction, and the indexes, including the activity, the particle size, the strength and the like, of the regenerated catalysts and the new catalysts are all the same.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for regenerating catalysts used in olefin esterification and hydration reactions. Background technique [0002] Olefin esterification or hydration reactions often use strong acidic catalysts. Strong acidic ion exchange resin catalysts show high catalytic activity and selectivity in catalyzing olefin esterification or hydration reactions. Therefore, macroporous type catalysts are mainly used in my country's industrial production at present. Strongly acidic ion exchange resins are used as catalysts. However, the activity of strongly acidic cation exchange catalysts will decrease during repeated use. The deactivation of the catalyst will bring adverse effects to the industrial production process. Through the research on the serviceability of the catalyst, the reasons for its deactivation and its regeneration method are studied. [0003] It is studied whether th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/40B01J31/10B01J38/62B01J38/52B01J38/54
Inventor 郑辉东蔡丽英赵素英王碧玉
Owner FUZHOU UNIV
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