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Catalyst for preparation of methyl ethyl ketone by 2,3-butanediol, and preparation method of catalyst

A technology of methyl ethyl ketone and catalyst, applied in the field of high selectivity and conversion rate catalyst and preparation of methyl ethyl ketone from 2,3-butanediol, to achieve good hydrothermal stability, enhanced penetration ability, improved accessibility and physical transfer performance Effect

Inactive Publication Date: 2018-02-02
李俊霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned preparation processes all have the advantages of simple process, mild reaction conditions, environmental friendliness, and low production cost. However, the concentration of the raw material solution (10-90wt%) applicable to the catalyst needs to be further expanded, and the catalyst itself needs to be modified so that the raw material solution can be Further improve the selectivity of the product methyl ethyl ketone while obtaining a higher conversion rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of preparation method of high selectivity and conversion rate catalyst of 2,3-butanediol system methyl ethyl ketone, is to realize by following steps:

[0024] 1) Preparation of carrier

[0025] First add NaOH and deionized water into the beaker and stir evenly, then add diacetone acryloyl ammonium trifluoroacetate and [choline][phenylalanine and stir for 20 minutes; then add tetraethyl silicate dropwise to it to continue Stir for 4h; wherein, SiO in mixture A 2 , NaOH, diacetone acryloyl ammonium trifluoroacetate, [choline] [phenylalanine, the molar ratio of deionized water is 1.0:0.5:0.06:0.06:100; the mixture A is transferred to polytetrafluoroethylene crystallization The kettle was treated at 150°C for 18h, then it was filtered, washed, and heated at 105 o C for 12 hours, then at 550 o Roasting at C for 5h to obtain MCM-68 molecular sieve;

[0026] 2) Loading of active components

[0027] Dissolve cerium salt and zirconium salt in deionized water, stir a...

Embodiment 2

[0030] A kind of preparation method of high selectivity and conversion rate catalyst of 2,3-butanediol system methyl ethyl ketone, is to realize by following steps:

[0031] 1) Preparation of carrier

[0032] First add NaOH and deionized water into the beaker and stir evenly, then add diacetone acryloyl ammonium trifluoroacetate and [choline][phenylalanine] and stir for 20min; then add tetraethyl silicate dropwise to it Continue to stir for 4h; wherein, SiO in mixture A 2 , NaOH, diacetone acrylamide ammonium trifluoroacetate, [choline][phenylalanine], and deionized water in a molar ratio of 1.0:0.5:0.06:0.03:100; transfer mixture A to polytetrafluoroethylene crystal It was treated at 180°C for 12h in a kettle, then it was filtered, washed, and heated at 105 o C for 12 hours, then at 550 o Roasting at C for 5h to obtain MCM-68 molecular sieve;

[0033] 2) Loading of active components

[0034] Dissolve cerium salt and zirconium salt in deionized water, stir at room temperatu...

Embodiment 3

[0037] A kind of preparation method of high selectivity and conversion rate catalyst of 2,3-butanediol system methyl ethyl ketone, is to realize by following steps:

[0038] 1) Preparation of carrier

[0039] First add NaOH and deionized water into the beaker and stir evenly, then add diacetone acryloyl ammonium trifluoroacetate and [choline][phenylalanine] and stir for 20min; then add tetraethyl silicate dropwise to it Continue to stir for 4h; wherein, SiO in mixture A 2 , NaOH, diacetone acrylamide ammonium trifluoroacetate and [choline][phenylalanine], deionized water in a molar ratio of 1.0:0.5:0.06:0.05:100; transfer mixture A to polytetrafluoroethylene crystal It was treated at 165°C for 15h in a kettle, then it was filtered, washed, and heated at 105 o C for 12 hours, then at 550 o Roasting at C for 5h to obtain MCM-68 molecular sieve;

[0040] 2) Loading of active components

[0041] Dissolve cerium salt and zirconium salt in deionized water, stir at room temperat...

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Abstract

The invention discloses a catalyst. MCM-68 with a mesoporous structure is prepared by taking a mixture of ionic liquid trifluoroacetic acid diacetone acrylamide and [choline][phenylalanine] as a template agent, the MCM-68 serves as a catalyst carrier, and elements Ce and Zr are loaded on the catalyst carrier by a supercritical technology. According to the catalyst disclosed by the invention, the hydrothermal stability of the catalyst is effectively improved, so that the catalytic reaction stability is improved and the service life is prolonged; the surface acid center concentration and the acid type distribution of the catalyst is modulated, so that the catalytic activity of the catalyst and the selectivity of products are obviously improved; in addition, under the process conditions, thecatalyst has the following advantages: the catalyst is not liable to deactivation, the hydrothermal stability is high, the concentration application range of the reaction raw materials is wide (5 to 100 percent), the conversion rate of 2,3-butanediol is obviously increased, and the selectivity of the methyl ethyl ketone is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of methyl ethyl ketone production, and relates to a catalyst for producing methyl ethyl ketone, in particular to a catalyst with high selectivity and conversion rate for producing methyl ethyl ketone from 2,3-butanediol and a preparation method. Background technique [0002] Methyl ethyl ketone is an organic solvent with outstanding properties. It has moderate boiling point, outstanding solvency, good drying characteristics, good stability, fast volatilization speed, low viscosity and low toxicity. It is a second only Ketone solvents based on acetone. Methyl ethyl ketone can be used as a solvent for polymer compounds such as polyurethane, nitrocellulose, acrylic resin, vinyl acid resin, phenolic resin, alkyd resin, ink, tape, paint, adhesive and lubricating oil dewaxing. It is the most suitable solvent for "triphenyl" Good substitute. In addition, methyl ethyl ketone is widely used in industrial fields suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J35/10C07C45/52C07C49/10
CPCC07C45/52B01J29/7049B01J2229/32B01J2229/18B01J35/60C07C49/10Y02P20/54
Inventor 李俊霞
Owner 李俊霞
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