Application of a Supported Single-Atom Noble Metal Catalyst in the Esterification of Unsaturated Hydrocarbon Carboxymethyl

A noble metal catalyst, supported technology, applied in the direction of carbon monoxide or formate reaction preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the disadvantages of homogeneous catalysts, not very economical and environmentally friendly, difficult catalysts Problems such as recovery and separation, to achieve high activity and selectivity, easy separation, and easy operation

Active Publication Date: 2022-03-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such catalysts are difficult to recover and separate, and corrode equipment
The researchers found that adding pyridine to the catalytic system can increase the conversion rate of the reaction, but it is not very economical and environmentally friendly, and still cannot solve the disadvantages of homogeneous catalysts

Method used

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  • Application of a Supported Single-Atom Noble Metal Catalyst in the Esterification of Unsaturated Hydrocarbon Carboxymethyl
  • Application of a Supported Single-Atom Noble Metal Catalyst in the Esterification of Unsaturated Hydrocarbon Carboxymethyl
  • Application of a Supported Single-Atom Noble Metal Catalyst in the Esterification of Unsaturated Hydrocarbon Carboxymethyl

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Dissolve 0.027g of chloroplatinic acid in 5g of deionized water, add 0.5g of ethylenediamine organic reagent, stir for 1h, then add 1g of molybdenum sulfide, stir for 2h, filter and wash, place in an oven at 120°C, Dry for 12 hours to obtain a supported highly dispersed platinum-based catalyst precursor, then place the precursor in a quartz tube, and treat it at 500° C. for 120 minutes under Ar conditions to obtain a 1% Pt / MoS2 catalyst, which is then used in a desiccator. It can be seen by spherical aberration electron microscopy that the active components are dispersed on the carrier in the form of single atoms.

Embodiment 2

[0030] Example 2: Dissolve 0.015g of ruthenium chloride in 20g of deionized water, add 0.5g of 25% ammonia water, stir for 3h, then add 1g of molybdenum disulfide, stir for 5h, filter and wash, place in an oven at 60°C, Dry for 8 hours to obtain a supported highly dispersed ruthenium-based catalyst precursor, then place the precursor in a quartz tube, and treat it at 600° C. for 100 minutes under He conditions to obtain a 1% Ru / MoS2 catalyst, which is then used in a desiccator. It can be seen by spherical aberration electron microscopy that the active components are dispersed on the carrier in the form of single atoms.

Embodiment 3

[0031] Example 3: Dissolve 0.027g of chloroplatinic acid in 5g of deionized water, add 0.5g of ethylenediamine organic reagent, stir for 1h, then add 1g of iron sulfide, stir for 2h, filter and wash, place in an oven at 120°C, Dry for 12 hours to obtain a supported highly dispersed platinum-based catalyst precursor, then place the precursor in a quartz tube, and treat it at 500° C. for 120 minutes under Ar conditions to obtain a 1% Pt / FeS catalyst, which is then placed in a desiccator for use. It can be seen by spherical aberration electron microscopy that the active components are dispersed on the carrier in the form of single atoms.

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PUM

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Abstract

The invention discloses the application of a supported single-atom noble metal catalyst in the esterification reaction of unsaturated hydrocarbon carboxymethyl. The active component is any one or more of Ru, Rh, Ir, Pt, Pd, Ag, Au. The load of metal is 0.05%-1.5%, the carrier is any one of chromium sulfide, manganese sulfide, iron sulfide, cobalt sulfide, nickel sulfide, copper sulfide, zinc sulfide, molybdenum sulfide, tungsten sulfide, titanium sulfide, the catalyst Preparation: After mixing the carrier and the active metal, calcining at a certain temperature. The catalyst is used for methyl esterification of unsaturated hydrocarbon carboxymethyl to prepare methyl ester compound, and has good activity and selectivity. Compared with the system in which homogeneous nickel carbonyl or palladium-phosphine complexes are used as catalysts and highly corrosive sulfuric acid or sulfonic acid is added as auxiliary agents, the heterogeneous reaction process provided by the invention is environmentally friendly, simple to operate, and recyclable Take advantage of other advantages.

Description

technical field [0001] The invention relates to the application of a supported single-atom noble metal catalyst in the esterification reaction of unsaturated hydrocarbon carboxymethyl Background technique [0002] Carboxymethylation of unsaturated hydrocarbons is a green, convenient, and highly atom-economical method for the preparation of methyl ester compounds, such as methyl methacrylate (ie, plexiglass). However, at present, homogeneous nickel carbonyl or palladium-phosphine complexes are still used as catalysts on a large scale in industry, and highly corrosive sulfuric acid or sulfonic acid is required as an auxiliary agent. If Ni(CO) is used 4 ,Co 2 (CO) 8 or Pd(PPh) 3 etc. as the main catalyst, trifluoromethanesulfonic acid, benzene methanesulfonic acid as auxiliary agents. Such catalysts are difficult to recover and separate, and corrode equipment. The researchers found that adding pyridine to the catalytic system can increase the conversion rate of the reacti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/38C07C69/54B01J27/051B01J27/049B01J27/04B01J27/047
CPCC07C67/38B01J27/051B01J27/049B01J27/04B01J27/047C07C69/54
Inventor 王爱琴王安任煜京张磊磊张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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