Catalyst and preparation method and application thereof, and method for preparing unsaturated carbonate

A catalyst and solvothermal reaction technology, applied in catalyst activation/preparation, catalytic reaction, chemical instruments and methods, etc., can solve problems such as cumbersome processes, and achieve the effects of simple process, less loss and high efficiency

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the prior art needs two-step preparation to obtain unsaturated carbonate and cause the process to be loaded down with trivial details, provide a kind of catalyst and its preparation method and application and the method for preparing unsaturated carbonate, the catalyst It can make unsaturated carbonate esters can be prepared only through one-step oxidative addition, the process is simple, and the comprehensive effect of excellent conversion rate and unsaturated carbonate selectivity can be obtained

Method used

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  • Catalyst and preparation method and application thereof, and method for preparing unsaturated carbonate
  • Catalyst and preparation method and application thereof, and method for preparing unsaturated carbonate
  • Catalyst and preparation method and application thereof, and method for preparing unsaturated carbonate

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preparation example Construction

[0024] As previously mentioned, the second aspect of the present invention provides a method for preparing a catalyst, the method comprising the following steps:

[0025] (1) mixing the manganese precursor with the activator and the first solvent, followed by separation, optional washing and optional drying, and then roasting to obtain manganese oxide;

[0026] (2) mixing the manganese oxide with the zinc precursor, 2-methylimidazole and a second solvent for solvothermal reaction, followed by separation, optional washing, and optional drying;

[0027] The molar ratio of the manganese oxide in terms of manganese element to the zinc precursor in terms of zinc element is 0.3-2.

[0028] The present invention has no limitation on the type of the manganese precursor, as long as the manganese oxide can be prepared through the manganese precursor; preferably, the manganese precursor is selected from potassium permanganate, manganese-containing nitrate, chloride at least one of salt ...

Embodiment approach

[0054] According to a preferred embodiment provided by the invention, the preparation method of the catalyst comprises the following steps:

[0055] (1) firstly mix the dispersant and the activator with the first solvent, then mix with the manganese precursor, sequentially separate, optionally wash and optionally dry, and then bake at 200-600°C for 1 -24h, to obtain manganese oxide;

[0056] (2) First mix the manganese oxide with the second solvent, then mix it with the zinc precursor, and finally mix it with 2-methylimidazole, perform solvothermal reaction at 60-200°C for 1-24h, and then separate , optionally washed, optionally dried;

[0057] The molar ratio of the manganese oxide in terms of manganese element to the zinc precursor in terms of zinc element is 0.3-2.

[0058] As mentioned above, the third aspect of the present invention provides a catalyst prepared by the preparation method described in the second aspect. The composition and performance of the catalyst are...

Embodiment 1

[0076] This example is used to illustrate the catalyst of the present invention, its preparation method and its application in the preparation of unsaturated carbonate.

[0077] Catalyst preparation:

[0078] (1) Add 0.182g of hexadecyltrimethylammonium bromide, 8.1g of benzyl alcohol and 500ml of water into the reaction kettle, after stirring, add 7.9g of potassium permanganate, stir, filter, wash with water at 100°C Drying; then roasting at 550°C for 5h in a muffle furnace to obtain manganese oxide.

[0079] (2) Disperse 1 g of the prepared manganese oxide in 50 ml of methanol, add 3.4 g of zinc nitrate and stir, add 0.94 g of 2-methylimidazole, seal after stirring, perform solvothermal reaction at 100 ° C for 8 hours, and then Filter, wash with methanol, and dry at 100° C. to obtain catalyst S1.

[0080] Carry out XRD characterization to gained catalyst, its characterization result is as follows figure 1 Shown in the B curve. Among them, curve A is the XRD pattern of ZI...

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Abstract

The invention relates to the field of unsaturated carbonic ester preparation, and discloses a catalyst and a preparation method and application thereof, and a method for preparing unsaturated carbonic ester. The catalyst comprises manganese oxide and a zinc metal organic framework compound, wherein a molar ratio of manganese element to zinc element in the catalyst is 0.3-2. The preparation method of the catalyst comprises the following steps: (1) mixing a manganese precursor with an activating agent and a first solvent, then sequentially carrying out separating, optional washing and optional drying, and then conducting roasting; and (2) mixing the obtained manganese oxide with a zinc precursor, 2-methylimidazole and a second solvent for a solvothermal reaction, and then carrying out separating, wherein a molar ratio of the usage amount of the manganese oxide in terms of elemental manganese to the usage amount of the zinc precursor in terms of elemental zinc is 0.3-2. According to the catalyst, unsaturated carbonic ester can be prepared only through one-step oxidation addition, a process is simple, and the comprehensive effect of excellent conversion rate and unsaturated carbonic ester selectivity can be obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of unsaturated carbonates, in particular to a catalyst, its preparation method and application, and a method for preparing unsaturated carbonates. Background technique [0002] Unsaturated carbonate is a class of solvents and fine chemical intermediates with excellent performance, and is a potential basic raw material for organic chemical industry. At the same time CO 2 Is a greenhouse gas, how to effectively fix has become one of the most challenging issues in this century. Usually through epoxy compounds and CO 2 Carry out addition reaction, synthesize unsaturated carbonate, its reaction equation is: [0003] Wherein, R is an alkyl group or an aryl group. [0004] This route is relatively mature, and the literature of the prior art also reports that a large number of catalytic systems are used in this route, and the target product can be obtained effectively. Most of the catalytic sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/32B01J37/08C07D317/36
CPCB01J31/1691B01J31/1815B01J31/32B01J37/08C07D317/36B01J2531/0213B01J2531/26B01J2231/341
Inventor 戈军伟何文军尚大伟王意
Owner CHINA PETROLEUM & CHEM CORP
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