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Preparation method of ordered mesoporous catalyst for synthesizing acrylic acid by acetic acid and methanol

A catalyst and acrylic acid technology, applied in the preparation of organic compounds, carboxylate salts, molecular sieve catalysts, etc., can solve the problems of low catalyst activity and selectivity, complicated preparation process and dangerous chemicals, and achieve low production cost and stable performance Good, easy-to-control effects

Active Publication Date: 2016-07-20
JIANGSU SOPO CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Technical problem to be solved: Aiming at the deficiencies of the prior art, the present invention provides an ordered mesoporous catalyst for the synthesis of acrylic acid from acetic acid and formaldehyde, which overcomes the complexity of the existing catalyst preparation process, the preparation process involves a large number of dangerous chemicals, and the catalyst activity and selection low sex problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing an ordered mesoporous catalyst for synthesizing acrylic acid with acetic acid and formaldehyde, which mainly includes the following steps:

[0027] Step 1: Dissolve 14g of P123 in 420ml of 2mol / L hydrochloric acid solution at a constant temperature of 40°C, stir and dissolve, slowly add 28g of ethyl orthosilicate dropwise, and then continue stirring for 24h.

[0028] Step 2: Move the solution obtained in Step 1 to a stainless steel hydrothermal reaction kettle, and crystallize at 100° C. for 24 hours.

[0029] Step 3: The precipitate obtained in Step 2 was continuously washed with water, filtered with suction, and dried in an oven at 100° C. for 24 hours.

[0030] Step 4: Calcining the solid obtained in Step 3 in a muffle furnace at 550° C. for 6 hours to obtain a carrier-ordered mesoporous molecular sieve SBA-15.

[0031] Step five: 2g sodium chloride, 4g boric acid and 2gTiO 2 Dissolve in 400g of water, mix and stir evenly to obtain a precurso...

Embodiment 2

[0037] A method for preparing an ordered mesoporous catalyst for synthesizing acrylic acid with acetic acid and formaldehyde, which mainly includes the following steps:

[0038] Step 1: Dissolve 14g of P123 in 420ml of 2mol / L hydrochloric acid solution at a constant temperature of 40°C, stir and dissolve, slowly add 28g of ethyl orthosilicate dropwise, and then continue stirring for 24h.

[0039] Step 2: Move the solution obtained in Step 1 to a stainless steel hydrothermal reaction kettle, and crystallize at 100° C. for 24 hours.

[0040] Step 3: The precipitate obtained in Step 2 was continuously washed with water, filtered with suction, and dried in an oven at 100° C. for 48 hours.

[0041] Step 4: Calcining the solid obtained in Step 3 in a muffle furnace at 550° C. for 6 hours to obtain a carrier-ordered mesoporous molecular sieve SBA-15.

[0042] Step five: 8g sodium carbonate, 12g boric acid and 2gZrO 2 Dissolve in 600g of water, mix and stir evenly to obtain a precur...

Embodiment 3

[0048] A method for preparing an ordered mesoporous catalyst for synthesizing acrylic acid with acetic acid and formaldehyde, which mainly includes the following steps:

[0049] Step 1: Dissolve 14g of P123 in 420ml of 2mol / L hydrochloric acid solution at a constant temperature of 40°C, stir and dissolve, slowly add 28g of ethyl orthosilicate dropwise, and then continue stirring for 24h.

[0050] Step 2: Move the solution obtained in Step 1 to a stainless steel hydrothermal reaction kettle, and crystallize at 100° C. for 24 hours.

[0051] Step 3: The precipitate obtained in Step 2 was continuously washed with water, filtered with suction, and dried in an oven at 100° C. for 24 hours.

[0052] Step 4: Calcining the solid obtained in Step 3 in a muffle furnace at 550° C. for 6 hours to obtain a carrier-ordered mesoporous molecular sieve SBA-15.

[0053] Step five: 4g sodium carbonate, 8g boric acid and 4gTiO 2 Dissolve in 200g of water, mix and stir evenly to obtain a precurs...

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Abstract

The invention discloses a preparation method of an ordered mesoporous catalyst for synthesizing acrylic acid by acetic acid and methanol. The preparation method includes synthesizing ordered mesoporous molecular sieves SBA-15 according to a hydrothermal synthesis method; dissolving sodium salt, boric acid and assistant in water and mixing evenly to obtain precursor steeping liquor; adding the carrier SBA-15 into the precursor steeping liquor for steeping, evaporating the mixed liquor in water bath to dryness, and putting the mixed liquor in a drying oven; baking the mixed liquor in a muffle furnace at the temperature of 400-600 DEG C for 2-8 hours to obtain the ordered mesoporous catalyst. The preparation method has the advantages that toxic hazard reagents or organic solvents are not used during catalyst preparation, and conditions are easy to control; raw materials are easy to get, production cost is low, and the preparation method is suitable for industrial mass production; due to well-developed ordered mesoporous passages of the prepared catalyst, the catalyst activity of acid-base thermometal active matter to aldol reaction is high, and selectivity and catalyst stability are also high.

Description

technical field [0001] The invention relates to a preparation process of an acid-base bifunctional catalyst, in particular to a preparation method of an ordered mesoporous catalyst for synthesizing acrylic acid from acetic acid and formaldehyde. Background technique [0002] Acrylic acid is the simplest unsaturated carboxylic acid, consisting of a vinyl group and a carboxyl group. Acrylic acid is an important organic synthetic raw material and synthetic resin monomer. Its excellent polymerization and esterification ability provides an extremely important intermediate for the synthesis and preparation of various fine chemicals. Acrylic acid is mainly used in the production of butyl and ethyl acrylate comonomers for water-soluble coatings and adhesives, and in the production of superabsorbent resins. Acrylic acid and its ester series products can be widely used in many fields such as coatings, plastics, chemical fibers, textiles, adhesives, and petroleum. [0003] Acrylic ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035C07C51/353C07C57/05
CPCB01J29/035C07C51/353C07C57/04
Inventor 邵守言朱桂生陈勇曹倩刘玲唐丽王忠华
Owner JIANGSU SOPO CHEM
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