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Supported catalyst for catalytic synthesis of bisphenol A and preparation method thereof

A catalyst and bisphenol technology, which is applied in the field of immobilized catalyst for catalyzing the synthesis of bisphenol A and its preparation, can solve unsatisfactory problems and achieve the effects of reducing equipment requirements, mild reaction conditions, and increasing dehydration condensation rate

Pending Publication Date: 2018-12-07
PEKING PUYUAN INST FOR ADVANCED MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, a series of studies have been carried out on new catalyst systems such as various ionic liquids and solid acid catalysts, but they are still unsatisfactory.

Method used

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  • Supported catalyst for catalytic synthesis of bisphenol A and preparation method thereof
  • Supported catalyst for catalytic synthesis of bisphenol A and preparation method thereof
  • Supported catalyst for catalytic synthesis of bisphenol A and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] In addition, for the immobilized catalyst of the present invention, the applicant specifically provides a preparation method, comprising the following steps:

[0026] S101: Add the core-shell structured mesoporous nanospheres of the immobilized catalyst into the Erlenmeyer flask, add concentrated sulfuric acid with a preset ratio drop by drop while stirring, and then let stand for adsorption for 12 to 15 hours. Wherein, the mass ratio of the carrier to the concentrated sulfuric acid is 1:(6-8), and the mass percent concentration of the concentrated sulfuric acid is 80-85%.

[0027] S102: Centrifuge the solution obtained in S101, take the bottom precipitate, and dry at 100-130° C. for 4-8 hours.

[0028] S103: cooling the dried product, washing it in boiling absolute ethanol, and drying it in vacuum at 110-125° C. to obtain a solid-supported catalyst.

[0029] In addition, the solid-supported catalyst provided by the invention is used in the synthesis process of bisphen...

Embodiment 1

[0036] This example provides a solid-supported catalyst, which is used to catalyze the synthesis of bisphenol-A. specifically:

[0037] (1) Preparation of solid-supported catalyst

[0038] S101: Carrier-core-shell structure mesoporous nanosphere TiO 2 @Fe 3 o 4 Add @C-SH into the Erlenmeyer flask, add concentrated sulfuric acid with a mass percent concentration of 82% drop by drop while stirring, and then let it stand for adsorption for 15 hours. Wherein, the mass ratio of carrier to concentrated sulfuric acid is 1:7.

[0039] S102: Centrifuge the solution obtained from the treatment of S101, take the bottom precipitate, and dry it at 120° C. for 5 hours.

[0040] S103: cooling the dried product, washing it in boiling absolute ethanol, and drying it in vacuum at 120° C. to obtain a solid-supported catalyst.

[0041] (2) Synthesis of bisphenol A

[0042] S201: Mix phenol and acetone uniformly at a preset molar ratio of 1:5 (0.1mol:0.02mol) to obtain a reaction mixture; t...

Embodiment 2

[0047] This example provides a solid-supported catalyst, which is used to catalyze the synthesis of bisphenol-A. specifically:

[0048] (1) Preparation of solid-supported catalyst

[0049] S101: Carrier-core-shell structured mesoporous nanosphere MoS 2 @Fe 3 o 4 Add @Si-SH into the Erlenmeyer flask, add concentrated sulfuric acid with a mass percent concentration of 82% drop by drop while stirring, and then let it stand for adsorption for 12 hours. Wherein, the mass ratio of carrier to concentrated sulfuric acid is 1:6.

[0050] S102: Centrifuge the solution obtained from the treatment of S101, take the bottom precipitate, and dry it at 130° C. for 4 hours.

[0051] S103: cooling the dried product, washing it in boiling absolute ethanol, and drying it in vacuum at 110° C. to obtain a solid-supported catalyst.

[0052] (2) Synthesis of bisphenol A

[0053] S201: Mix phenol and acetone uniformly at a preset molar ratio of 1:1 (0.1mol:0.1mol) to obtain a reaction mixture; ...

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Abstract

The invention relates to a supported catalyst for catalytic synthesis of bisphenol A and a preparation method thereof. The supported catalyst comprises the following raw materials: a carrier and an acid, wherein the carrier is a mesoporous material having a core-shell structure or a mesoporous material having the core-shell structure and modified and grafted by a mercapto group, and the acid is sulfuric acid. The supported catalyst is used in the reaction of phenol and acetone for preparation of bisphenol A. According to the preparation method, phenol and acetone are used as raw materials (ina molar ratio of 1-5: 1); the usage amount of the supported catalyst is 5%-12% of the total reactants; and a reaction is carried out at a preset temperature to finally obtain the target product bisphenol A. The supported catalyst provided by the invention can be effectively used for catalytic synthesis of bisphenol A, significantly accelerates a condensation reaction rate, has the advantages of stable process, mild reaction conditions, good product selectivity and high catalyst activity in the whole synthesis process, and effectively solves disadvantages in the prior art; and the catalyst is easy to recycle, so production cost can be significantly reduced.

Description

technical field [0001] The invention relates to the technical field of bisphenol A synthesis, in particular to a solid-supported catalyst for catalyzing the synthesis of bisphenol A and a preparation method thereof. Background technique [0002] Bisphenol A, scientific name 2,2-bis(4-hydroxyphenyl)propane, abbreviated as BPA in English, as an important organic chemical raw material, is an important derivative of phenol and acetone, mainly used in the synthesis of epoxy resin , polycarbonate and high temperature resistant polyester and other important raw materials. At present, the modified ion exchange resin method is mainly used to synthesize bisphenol A at home and abroad, because the method is not corrosive to the equipment and is easy to separate from the reaction solution. However, the existing modified resins also have many problems, such as poor thermal stability, poor swelling, difficult on-line regeneration and activation of the resin, and easy deactivation. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02C07C37/20C07C39/16
CPCC07C37/20B01J27/02B01J35/33C07C39/16Y02P20/584Y02P20/52
Inventor 史吉华殷鹏刚
Owner PEKING PUYUAN INST FOR ADVANCED MATERIALS & TECH
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