Catalyst for low-temperature synthesis of methanol and preparation method

A technology for synthesizing methanol and catalysts, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of hydroxyl compounds, etc. It can solve the problems of increasing the investment in the synthesis gas manufacturing process and the cost of synthesis gas, poor high temperature resistance, and low single-pass conversion rate. , achieving high methanol synthesis activity and thermal stability, easy large-scale production, and simple operation methods

Active Publication Date: 2012-11-14
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has high activity and high selectivity, but it has poor high temperature resistance and is sensitive to sulfur. It is currently the main catalyst used for methanol synthesis in industry.
[0007] At present, the existing industrial methods for synthesizing methanol have reached a fairly high level, but there are still three major shortcomings to be overcome and breakthroughs: (1) due to the restriction of the thermodynamic equilibrium at the reaction temperature, the single-pass conversion rate is low, and at the outlet of the synthesis tower The concentration of methanol in the product can rarely exceed 7%, so multiple cycles have to be used, which greatly increases the investment in the syngas manufacturing process and the cost of syngas
(2) Methods such as ICI require that the feed gas must contain 5% CO 2 , resulting in the harmful impurity-water. In order to make the methanol product meet the requirements of fuel and downstream chemical products, methanol-water separation with high energy consumption has to be carried out
(3) The cost of syngas purification by traditional methods such as ICI is very high
[0018] The catalyst prepared by the above method has a high cost, and because the composite catalyst system is used, there are certain interactions and optimal synergistic effects among the components. When some components are dissimilated or poisoned, the activity of the entire system can be caused. decline, the catalyst is easily deactivated

Method used

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  • Catalyst for low-temperature synthesis of methanol and preparation method
  • Catalyst for low-temperature synthesis of methanol and preparation method
  • Catalyst for low-temperature synthesis of methanol and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The "direct method" fluidized bed process commonly used in the silicone industry is used to prepare 5g of waste contacts produced in the process of preparing organosilicon monomer methylchlorosilane. 2 nanometers to 10 microns, wherein the silicon content is 84wt%, the copper content is 6wt%, and the carbon content is 10wt%. .

[0046] The catalyst material prepared above was subjected to XRD test on the X'Pert PROMPD multifunctional X-ray diffractometer produced by Panalytical Company (Panalytical) in the Netherlands.

[0047] The surface morphology of the catalyst material prepared above was observed with a JSM6700 field emission scanning electron microscope produced by JEOL Ltd.

[0048] The catalyst material prepared above was subjected to a TG test on a model TG / DTA6300 enthusiasm analyzer produced by Japan SEICO.

[0049] The catalyst materials prepared above were tested by ICP on the Pekin-Elmer Inductively Coupled Plasma Atomic Emission Spectrometer in the Uni...

Embodiment 2

[0054] The "direct method" fluidized bed process commonly used in the silicone industry is used to prepare 5g of waste contacts produced in the process of preparing organosilicon monomer methylchlorosilane. 2 nanometers to 10 microns, where the silicon content is 84wt%, the copper content is 6wt%, and the carbon content is 10wt%. After washing twice with 100mL of benzene and chloroform, filter and dry in a vacuum oven at 100°C for 2 hours. , placed in a muffle furnace, heated at 100°C for 10h, and cooled to room temperature. The catalyst materials prepared above were tested by ICP on the Pekin-Elmer Inductively Coupled Plasma Atomic Emission Spectrometer in the United States, and the results are shown in Table 1.

[0055] figure 2 For the XRD pattern of the catalyst obtained in Example 2, wherein 2θ=28.6° is the characteristic peak of Si, the shoulder peak composed of 2θ=35.5° and 2θ=38.7° is the characteristic peak of CuO, and 2θ=26.6° is the characteristic peak of C Peak,...

Embodiment 3

[0059] The "direct method" fluidized bed process commonly used in the silicone industry is used to prepare 5g of waste contacts produced in the process of preparing organosilicon monomer methylchlorosilane. 2 nanometers to 10 microns, where the silicon content is 84wt%, the copper content is 6wt%, and the carbon content is 10wt%. After washing twice with 100mL of toluene and acetone, filter and dry in a vacuum oven at 100°C for 2 hours. , placed in a muffle furnace, heated at 900°C for 0.5h, then passed through an inert gas, heated at 800°C for 10h, and cooled to room temperature to obtain a silicon / copper oxide porous composite catalyst for synthesis gas to methanol. The catalyst materials prepared above were tested by ICP on the Pekin-Elmer Inductively Coupled Plasma Atomic Emission Spectrometer in the United States, and the results are shown in Table 1.

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Abstract

The invention relates to the production field of low-temperature synthesis of methanol, and particularly relates to a catalyst for low-temperature synthesis of methanol and a preparation method. The method includes the steps of: crushing and screening waste contacts generated from direct method production of methyl chlorosilane, and then using an organic solvent for cleaning. The method also can further include the following steps of: subjecting the cleaned waste contacts to one or more of an oxidation treatment, a reduction treatment and a heat treatment, thus obtaining the catalyst for low-temperature preparation of methanol from synthesis gas. The method provided in the invention solves the high value comprehensive utilization problem of solid residual waste contacts in the organosilicon synthesis industry. The prepared catalyst has the advantages of low raw material cost, simple operation method, as well as easy large-scale production, and shows higher methanol synthesis activity and thermal stability.

Description

technical field [0001] The invention relates to the field of low-temperature synthetic methanol production, in particular, the invention relates to a catalyst and a preparation method for low-temperature synthetic methanol. Background technique [0002] Silicone materials have dual properties of inorganic materials and organic materials, high and low temperature resistance, electrical insulation, weather resistance, corrosion resistance, non-toxic and tasteless and other excellent properties, widely used in electronics, automobiles, petroleum, chemicals, construction, aerospace, etc. field. Methylchlorosilane is the most important organosilicon monomer used in the preparation of organosilicon materials, and is the foundation and pillar of the entire organosilicon industry. [0003] Among the various methods for synthesizing methylchlorosilane, the direct method has become the only industrialized production method because of its simple process, high yield, no solvent, low ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C07C31/04C07C29/154
CPCY02P20/52
Inventor 苏发兵赵丽润车红卫王莹利高俊杰宋莲英贾昭翟世辉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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