Catalyst for synthesizing low-carbon mixed alcohol by hydrogenation of carbon dioxide and preparation method thereof

A low-carbon mixed alcohol and carbon dioxide technology, applied in the preparation of organic compounds, the preparation of hydroxyl compounds, catalysts for physical/chemical processes, etc., to achieve strong hydrothermal stability, avoid carbon deposition and deactivation, and improve the effect of dispersion.

Active Publication Date: 2019-09-06
CHINA HUANENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a catalyst for the synthesis of low-carbon mixed alcohols by hydrogenation of carbon dioxide and its preparation method, which solves the above-mentioned technical problems in the existing catalysts used for catalytic hydrogenation of carbon dioxide into low-carbon mixed alcohols

Method used

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  • Catalyst for synthesizing low-carbon mixed alcohol by hydrogenation of carbon dioxide and preparation method thereof

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preparation example Construction

[0028] A method for preparing a catalyst for the synthesis of low-carbon mixed alcohols from carbon dioxide, the specific preparation steps are as follows:

[0029] S1: Weigh aluminum salt, copper salt, zinc salt, potassium salt, TEPA, NaOH and silicon source; among them, the molar ratio of aluminum salt, copper salt, zinc salt, potassium salt, TEPA, NaOH and silicon source is 1 :(0.2-3):(0.2-2):(0.1-1):(1-5):(1-5):(3-10);

[0030] S2: Dissolve the weighed aluminum salt in deionized water, heat it to 60-90°C, stir evenly at a rotating speed of 100-500r / min, and then add copper salt, TEPA, sodium hydroxide, and silicon source in sequence, mix and stir evenly A slurry mixture is obtained;

[0031] S3: Transfer all the slurry mixture obtained in S2 to a hydrothermal synthesis kettle, and fix it in a homogeneous reactor for crystallization at 120-170°C for 48-120 hours to obtain a crystalline product;

[0032] S4: Weigh a metered amount of zinc salt and dissolve it in deionized water to ...

Embodiment 1

[0042] This embodiment includes the following steps:

[0043] 1. Weigh 5g of sodium metaaluminate and dissolve it in 50ml of deionized water, stir well at 90℃ and 300r / min, then add 15g of CuSO sequentially 4 ·5H2O, 13g of TEPA, 5g of NaOH, 60g of large particles of silica sol are mixed and stirred to obtain a slurry mixture; all the slurry mixture is transferred to the hydrothermal synthesis kettle and installed in a homogeneous reactor at 180℃ After crystallization for 72 hours, the crystallization product is a precursor of Cu-SSZ-13 molecular sieve.

[0044] 2. Weigh 16g of Zn(CH 3 COO) 2 Dissolve in 50ml deionized water at 90℃, add dropwise to the above crystallized product for ion exchange for 8h. After the exchange is complete, cool the mixture, filter with suction, and wash with deionized water three times to PH=7. After washing The filter cake was dried in a microwave drying oven at 100°C for 30 minutes to obtain a dried product. The dried product was calcined in a muffle f...

Embodiment 2

[0047] This embodiment includes the following steps:

[0048] 1. Weigh 7g of sodium metaaluminate and dissolve it in 50ml of deionized water, stir well at 90℃ and 500r / min, then add 20g of CuSO successively 4 ·5H2O, 20g of TEPA, 8g of NaOH, 70g of small particles of silica sol are mixed and stirred uniformly to obtain a slurry mixture; all the slurry mixture is transferred to the hydrothermal synthesis kettle and installed in a homogeneous reactor at 170℃ After 72h, the crystallized product is the precursor of Cu-SSZ-13 molecular sieve.

[0049] 2. Weigh 24g of Zn(CH 3 COO) 2 Dissolve in 50ml of deionized water, add dropwise to the crystalline product obtained above at 90°C for ion exchange for 8 hours. After the exchange is complete, cool the mixture, filter with suction, and wash with deionized water three times to pH=7 , The washed filter cake was dried in a microwave drying oven at 100°C for 20 minutes to obtain a dried product. The dried product was placed in a muffle furnace ...

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Abstract

The invention provides a catalyst for synthesizing a low-carbon mixed alcohol by hydrogenation of carbon dioxide and a preparation method thereof. SSZ-13 molecular sieve is adopted as a carrier for synthesizing the low-carbon alcohol by the carbon dioxide, and the SSZ-13 molecular sieve has a large specific surface area, thereby greatly improving the dispersity of active components; at the same time, the SSZ-13 molecular sieve has strong hydrothermal stability and avoids carbon deposition deactivation of the catalyst caused by hot spot temperature in the process of synthesizing the low carbonmixed alcohol. Copper sources can be simultaneously introduced in the synthesis process of the molecular sieve, so that the selectivity of catalytic synthesis of the low-carbon alcohol is high, the synthesis method is simple, and large-scale production is easy; and the catalyst is particularly suitable for synthesis of the low-carbon mixed alcohol by catalytic hydrogenation reaction of the CO2, added value of products is high, and the catalyst has good application prospect.

Description

Technical field [0001] The invention belongs to the technical field of synthesis gas hydrogenation catalyzed synthesis of low mixed alcohols, and particularly relates to a catalyst for synthesis of low carbon mixed alcohols by hydrogenation of carbon dioxide and a preparation method thereof. Background technique [0002] In recent years, with the acceleration of industrialization and the over-exploitation and utilization of fossil energy, a large amount of carbon dioxide emissions have been caused. The environmental problems caused by the global greenhouse effect have become increasingly prominent, and the fixation and comprehensive utilization of carbon dioxide has attracted more and more attention. , The use of carbon dioxide to transform into high value-added resources is an effective way to solve environmental and energy problems. [0003] Among them, the most researched is the catalytic hydrogenation of carbon dioxide into low-carbon mixed alcohols. As we all know, the price ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76C07C29/154C07C31/04C07C31/08C07C31/02
CPCB01J29/763B01J2229/186C07C29/154C07C31/04C07C31/08C07C31/02Y02P20/52
Inventor 王晓龙何忠王琪刘蓉郜时旺
Owner CHINA HUANENG GRP CO LTD
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