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Catalyst for preparing diphenyl carbonate as well as preparation method and application thereof

A technology for diphenyl carbonate and dimethyl carbonate, which is applied to the catalyst for preparing diphenyl carbonate and the field of preparation thereof, can solve the problem that the catalyst is not easily deactivated, the active component is lost, the activity of the heterogeneous catalyst, and the selectivity is low. question

Pending Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by this invention is the problem of heterogeneous catalyst activity and low selectivity existing in the prior art, and a new method for preparing diphenyl carbonate from dimethyl carbonate and phenol is provided. The catalyst is coated and fixed on titanium dioxide through the carbon layer, which better solves the problem that the active components in the catalyst are easy to lose, and makes the provided catalyst not easy to deactivate

Method used

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  • Catalyst for preparing diphenyl carbonate as well as preparation method and application thereof
  • Catalyst for preparing diphenyl carbonate as well as preparation method and application thereof
  • Catalyst for preparing diphenyl carbonate as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Dissolve 0.53 g of glucose in 100 mL of water, stir, add dropwise sulfuric acid to adjust the pH to 1, and add 20 g of tetrabutyl titanate to prepare a precursor solution. Put the precursor solution into a high-pressure hydrothermal kettle, conduct hydrothermal crystallization treatment at 160° C. for 24 hours, cool, filter, wash with water, and dry to obtain a catalyst intermediate. The catalyst intermediate was calcined at 200° C. for 2 h under nitrogen atmosphere to obtain catalyst C1.

[0047] It was measured that the particle size of the titanium dioxide particles in the catalyst C1 was 1000 nm, and the thickness of the carbon layer was 5 nm.

Embodiment 2

[0049] Dissolve 1.1 g of glucose in 100 mL of water, stir, add dropwise hydrochloric acid to adjust the pH to 2, and add 20 g of tetrabutyl titanate to prepare a precursor solution. Put the precursor solution into a high-pressure hydrothermal kettle, conduct hydrothermal crystallization treatment at 170° C. for 24 hours, cool, filter, wash with water, and dry to obtain a catalyst intermediate. The catalyst intermediate was calcined at 200° C. for 2 h under nitrogen atmosphere to obtain catalyst C2.

[0050] It is measured that the particle size of the titanium dioxide particles in the catalyst C2 is 1000 nm, and the thickness of the carbon layer is 10 nm.

Embodiment 3

[0052] 2.1 g of glucose was dissolved in 100 mL of water, stirred, hydrochloric acid was added dropwise to adjust the pH to 2, and 20 g of tetrabutyl titanate was added to prepare a precursor solution. Put the precursor solution into a high-pressure hydrothermal kettle, conduct hydrothermal crystallization treatment at 170° C. for 24 hours, cool, filter, wash with water, and dry to obtain a catalyst intermediate. The catalyst intermediate was calcined at 200° C. for 2 h under nitrogen atmosphere to obtain catalyst C3.

[0053] It was measured that the particle size of the titanium dioxide particles in the catalyst C3 was 1000 nm, and the thickness of the carbon layer was 16 nm.

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Abstract

The invention provides a catalyst for preparing diphenyl carbonate. The catalyst comprises titanium dioxide and a carbon layer coating the titanium dioxide. The titanium dioxide is coated and fixed by the carbon layer, so that the problem that active components in the catalyst are easy to lose is better solved, and the provided catalyst has the characteristic of difficulty in inactivation.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a catalyst for preparing diphenyl carbonate, a preparation method and application thereof. Background technique [0002] Diphenyl carbonate (DPC) is a raw material for the preparation of polycarbonate by non-phosgene method. The traditional preparation method is phosgene method, which is subject to policy restrictions due to the potential harm of highly toxic phosgene to the environment and safe production. The process of synthesizing diphenyl carbonate by transesterification of phenol (PhOH) and dimethyl carbonate (DMC) under the action of a catalyst avoids the use of highly toxic raw material phosgene, and the main by-product methanol can also be recycled for the starting raw material carbonic acid The synthesis of dimethyl ester is the most promising green process route for industrialization. [0003] At present, the transesterification of dimethyl carbonate and phe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/18B01J37/02B01J37/10B01J37/08C07C68/06C07C69/96
CPCC07C68/06B01J21/063B01J21/18B01J37/0215B01J37/10B01J37/082C07C69/96
Inventor 戈军伟何文军郑南王意
Owner CHINA PETROLEUM & CHEM CORP
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