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Composition, preparation method and application of catalyst for preparing isobutanol from synthesis gas

A catalyst and synthesis gas technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of high content, harsh reaction conditions of the catalyst system, and low content of isobutanol

Active Publication Date: 2021-01-12
INNER MONGOLIA UNIVERSITY
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Problems solved by technology

[0004] But generally speaking, the developed catalyst system has harsh reaction conditions, low catalytic activity, low isobutanol content in the product, and high content of low-value by-products such as methanol, which hinders the industrialization and commercialization of isobutanol synthesis.
Although researchers have made extraordinary efforts in the development of catalyst systems for syngas synthesis of low-carbon alcohols (especially catalysts for syngas synthesis of isobutanol), the improvement of catalyst activity and isobutanol selectivity is still a huge challenge. challenge

Method used

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  • Composition, preparation method and application of catalyst for preparing isobutanol from synthesis gas
  • Composition, preparation method and application of catalyst for preparing isobutanol from synthesis gas

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Embodiment

[0012] Dissolve 1.68 g of cesium hydroxide in 25 mL of deionized water to prepare a cesium hydroxide solution. After dissolving 2.60 g of ammonium tetrathiomolybdate in 50 mL of deionized water, it was added dropwise into the cesium hydroxide solution under mechanical stirring, and an orange precipitate was formed immediately. Stirring was continued for 4 hours to fully react the starting material. The obtained orange precipitate was suction-filtered, washed with ethanol three times, and vacuum-dried overnight at 60 degrees Celsius to obtain cesium tetrathiomolybdate (Cs 2 MoS 4 ). The prepared Cs 2 MoS 4 Tablet granulation, take 40-60 mesh granules for later use.

[0013] The Cs prepared by the above steps 2 MoS 4 Catalysts were evaluated for catalytic performance in a stainless steel fixed-bed reactor. Before the reaction starts, the catalyst is heated in the reactor with hydrogen at 310 o C for 2 hours. Reaction conditions: temperature 350°C-390°C, pressure 10 MPa...

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Abstract

The invention discloses a catalyst for directly preparing isobutanol from synthesis gas. The composition of the catalyst is cesium tetrathiomolybdate. The preparation method of cesium tetrathiomolybdate comprises the following steps: respectively dissolving ammonium tetrathiomolybdate and cesium hydroxide in water, dropwisely adding an ammonium tetrathiomolybdate solution into the cesium hydroxidesolution, carrying out suction filtration on the obtained precipitate, and carrying out vacuum drying to obtain cesium tetrathiomolybdate. The obtained cesium tetrathiomolybdate can be used for preparing isobutanol from synthesis gas after being granulated. The catalyst provided by the invention has the advantages of simple preparation method, high total alcohol selectivity and high isobutanol content in total alcohol, is suitable for synthesis gas with a low H2 / CO ratio, and has a good application prospect.

Description

technical field [0001] The invention relates to a catalyst for producing isobutanol from synthesis gas and its application, in particular to a cesium tetrathiomolybdate catalyst and its application for producing isobutanol from synthesis gas. Background technique [0002] Isobutanol is an important basic chemical raw material, which can be used to make petroleum additives, antioxidants, plasticizers, synthetic rubber, artificial musk, fruit essential oils and synthetic drugs, etc. Its ester derivatives such as isobutyl acetate, isobutyl butyrate, and isobutyl lactate can be used as solvents in the coating industry; in addition, isobutyl sebacate and long-chain fatty acid isobutyl can be used to synthesize lubricants agents and hydraulic oils. Isobutanol is also widely used as a thinner in nitrocellulose lacquers to increase its gloss and flow and to prevent fading. In addition, isobutanol can also be used to prepare gasoline blended fuel. Butanol is an oxygen-containing f...

Claims

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Application Information

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IPC IPC(8): B01J27/02C01G39/00C07C29/153C07C31/12
CPCC01G39/006C07C29/153B01J27/02C01P2002/72C07C31/12Y02P20/52
Inventor 苏海全屈皓贺思慧苏越
Owner INNER MONGOLIA UNIVERSITY
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