Catalyst for synthesizing diethyl carbonate by ethanol vapor-phase carbonyl

A technology for the synthesis of diethyl carbonate and oxo, which is used in the preparation of carbon dioxide or inorganic carbonate, chemical instruments and methods, catalysts for physical/chemical processes, etc. It can solve problems such as easy loss, and achieve the effect of stable structure, good stability and improved activity.

Inactive Publication Date: 2008-05-21
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Activated carbon-based catalysts have the disadvantages of easy loss of active components and poor catalyst stability; molecular sieve catalysts prepared by solid ion exchange method have better service life, but the conversion rate of ethanol is relatively low, and the selectivity of the catalyst is not ideal

Method used

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  • Catalyst for synthesizing diethyl carbonate by ethanol vapor-phase carbonyl

Examples

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Embodiment 1

[0020] The preparation method of the mesoporous carbon carrier is as follows: add 1g of template agent SBA-15 to 5g of water, then add 1g of sucrose and 0.1g of sulfuric acid, evaporate the water at 90°C, and then place it in an oven at 160°C Place it for 6h for preliminary carbonization. Dissolve the initially carbonized product in 5 g of water, then add 1 g of sucrose and 0.1 g of H 2 SO 4 , After evaporating the water at 90°C, it was further carbonized at 160°C for 6h. in N 2 Under the atmosphere, the temperature was raised to 900 °C at 5 °C / min, kept at a constant temperature for 4 hours, and cooled to 25 °C. The obtained silica / carbon composite product was washed with 5% HF solution to remove silica, and dried at 120 °C to obtain a medium Porous carbon support.

[0021] Dissolve 2 g of CuCl in NH 3 ·H 2 O, prepare a copper salt solution with a concentration of 8%, and immerse 8 g of mesoporous carbon support particles in the above solution, and immerse at 25° C. for...

Embodiment 2

[0023] Under the condition that the preparation conditions of the catalyst were exactly the same as those in Example 1, only the template agent in the preparation method of the mesoporous carbon material was changed to 1.5 g of ZSM-5 to obtain 8.5 g of the catalyst.

Embodiment 3

[0025] Under the condition that the preparation conditions of the catalyst were exactly the same as in Example 1, only the template agent in the preparation method of the mesoporous carbon material was changed to 1.25 g of Hβ, and 8.5 g of the catalyst was obtained.

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Abstract

The invention discloses a catalyst used in synthesizing diethyl carbonate by ethanol carbonylation and a preparation method thereof. Active component of the catalyst is CuCl or CuCl2, a carrier is mesoporous carbon, and charge number accounts for 5 to 20 percent of the carrier. The preparation process comprises that: acid solvent which contains screened SBA-15 molecular in sucrose is processed by two-step carbonization treatment, high-temperature roasting process is adopted to carbonize finally, HF solvent is adopted to dispel molecular and the mesoporous carbon carrier is screened and prepared, the mesoporous carbon carrier is then soaked in copper solution, and the catalyst is prepared after evaporation drying. The invention has the advantages that the preparation process is simple and preparation cost is low; the catalyst is used in the ethanol carbonylation reaction to synthesize the diethyl carbonate, which has the advantages of high selectivity and stable catalytic activity of the production of the diethyl carbonate, etc.

Description

technical field [0001] The invention relates to a catalyst for ethanol gas-phase oxo synthesis of diethyl carbonate and a preparation method thereof, belonging to the gas-phase synthesis catalytic technology for synthesizing diethyl carbonate. Background technique [0002] Diethyl carbonate (DEC) is an environmentally friendly organic synthesis intermediate with a wide range of uses and is known as a "green chemical". DEC has high industrial value in the fields of energy, electronics, and medicine. At the same time, DEC is also one of the most competitive substitutes for gasoline additive methyl tert-butyl ether, and has a wide application prospect. [0003] The synthesis process of DEC mainly includes the phosgene method [1] , transesterification [2] , ethanol carbon dioxide direct synthesis method and ethanol oxidative carbonylation method, etc. Ethanol gas-phase oxidative oxo synthesis DEC has unique advantages, which not only meet the requirements of green chemical in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/122C07C69/96C07C68/04
CPCY02P20/141
Inventor 王胜平张萍波马新宾陈爽黄守莹
Owner TIANJIN UNIV
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