Catalyst for synthesis of dimethyl carbonate by using gas-phase method and preparation and application of catalyst

A technology of dimethyl carbonate and catalysts, which is applied in the field of embedded nano-Pd particle catalysts and its preparation, can solve the problems of catalyst activity and service life, chlorine-containing catalysts corrode equipment, etc., and achieve the elimination of equipment corrosion problems and good stability , the effect of high space-time yield

Inactive Publication Date: 2018-06-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned problems in the prior art, the present invention provides a carbonized composite carrier chlorine-free catalyst embedded with nano-Pd particles and its preparation method and application, which effectively solves the problem that catalyst activity and service life cannot be balanced and chlorine-containing catalysts corrode equipment. The problem of high reactivity and good stability for the synthesis of dimethyl carbonate by CO low-pressure gas phase method

Method used

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  • Catalyst for synthesis of dimethyl carbonate by using gas-phase method and preparation and application of catalyst

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Effect test

Embodiment 1

[0025] Add 0.1g sucrose to 10ml deionized water to prepare a solution, and 10g α-Al 2 o 3 The carrier was impregnated in sucrose solution, dried naturally, then placed in an electric blast drying oven, dried at 100°C for 12 hours, and finally dried in N 2 Carbonization at 800°C for 4 hours under atmosphere to obtain a carbonized composite carrier. Dissolve 0.2510g of potassium acetate and 0.3771g of copper acetate in 10ml of deionized water to prepare a mixed solution of auxiliary active component salt. Then 10g of carbonized composite carrier was added into the mixed solution of co-active components, immersed for 8h, dried naturally, dried in a blast oven at 80°C for 12h and baked in a muffle furnace at 400°C for 2h. Add 0.2110g of palladium acetate to 16ml of acetone, and then sonicate in an ultrasonic instrument at 30°C and 20KHz for 30min to prepare a 0.006g Pd / ml solution. Then add the carbonized composite carrier loaded with additives into the main active component so...

Embodiment 2

[0027] Add 0.2g sucrose to 10ml deionized water to prepare a solution, and 10g α-Al 2 o 3 The carrier was impregnated in sucrose solution, dried naturally, then placed in an electric blast drying oven, dried at 100°C for 12 hours, and finally dried in N 2 Carbonization at 800°C for 4 hours under atmosphere to obtain a carbonized composite carrier. Dissolve 0.2510g of potassium acetate and 0.3771g of copper acetate in 10ml of deionized water to prepare a mixed solution of auxiliary active component salt. Then 10g of carbonized composite carrier was added into the mixed solution of co-active components, immersed for 8h, dried naturally, dried in a blast oven at 80°C for 12h and baked in a muffle furnace at 400°C for 2h. Add 0.2110g of palladium acetate to 16ml of acetone, and then sonicate in an ultrasonic instrument at 30°C and 20KHz for 30min to prepare a 0.006g Pd / ml solution. Then add the carbonized composite carrier loaded with additives into the main active component so...

Embodiment 3

[0029] Add 0.4g sucrose to 10ml deionized water to prepare a solution, and 10g α-Al 2 o 3 The carrier was impregnated in sucrose solution, dried naturally, then placed in an electric blast drying oven, dried at 100°C for 12 hours, and finally dried in N 2 Carbonization at 800°C for 4 hours under atmosphere to obtain a carbonized composite carrier. Dissolve 0.2510g of potassium acetate and 0.3771g of copper acetate in 10ml of deionized water to prepare a mixed solution of auxiliary active component salt. Then 10g of carbonized composite carrier was added into the mixed solution of co-active components, immersed for 8h, dried naturally, dried in a blast oven at 80°C for 12h and baked in a muffle furnace at 400°C for 2h. Add 0.2110g of palladium acetate to 16ml of acetone, and then sonicate in an ultrasonic instrument at 30°C and 20KHz for 30min to prepare a 0.006g Pd / ml solution. Then add the carbonized composite carrier loaded with additives into the main active component so...

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Abstract

The invention discloses a catalyst for synthesis of dimethyl carbonate from CO by using a low-pressure gas-phase method and a preparation method of the catalyst. The main active component of the catalyst is palladium which accounts for 0.1-3% in the total mass of the catalyst, assistant active components are K, Cu, Co or Ni which account for 0.1-10% in the total mass of the catalyst, and a carbonized composite carrier is adopted as a carrier. The preparation method of the catalyst is characterized in that alumina, silicon dioxide, lithia-alumina spinel, molecular sieve oxide are impregnated with a carbonizing agent for carbonization so as to prepare the composite carrier, and then the assistant active components and the main active component are loaded on the carbonized composite carrier successively, so that the non-chlorine catalyst is thus prepared. The catalyst is applied to a reaction for synthesizing dimethyl carbonate from CO and methyl nitrite by using the low-pressure gas-phase method, the problems of equipment corrosion and deactivation caused by a chlorine-containing catalyst are solved, and the catalyst is an efficient catalyst with a prospect of industrial application.

Description

technical field [0001] The invention belongs to the technical field of heterogeneous catalysis for synthesizing alkyl carbonate by CO low-pressure gas-phase method, and specifically relates to an embedded nano-Pd particle catalyst for synthesizing dimethyl carbonate by CO and methyl nitrite low-pressure gas-phase method and its preparation method . Background technique [0002] Dimethyl carbonate (English name Dimethyl Carbonate, DMC for short), molecular formula C 3 h 6 o 3 , the structural formula is (CH 3 O) 2 CO. In view of the low toxicity of DMC, it has been listed as one of the non-toxic chemicals by European countries in 1992. It is known as "green basic chemical raw material" and is listed as a non-toxic solvent by many international organizations. "Environmentally friendly organic chemical raw materials required by the company have broad application prospects in the fields of pesticides, medicines, plastics, dyes, coatings and new materials, and are known as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58B01J23/89C07C68/00C07C69/96
CPCB01J23/58B01J23/8926B01J23/8946B01J37/024B01J37/084C07C68/00C07C69/96
Inventor 潘振栋田志坚马怀军曲炜王冬娥王从新李鹏王琳韩健强
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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