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Preparation method of catalyst

A catalyst, zinc chloride technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of lower methanol conversion rate of raw materials, insufficient utilization rate of raw materials, inability to achieve methanol conversion rate and methyl alcohol conversion rate. mercaptan yield and other issues, to achieve the effects of reducing production costs, reducing reaction temperature and pressure, and mild reaction conditions

Active Publication Date: 2015-07-08
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the introduction of active components in the above-mentioned numerous catalysts has greatly improved the selectivity of the reaction product methyl mercaptan, it has also inevitably covered part of the acid centers on the carrier, resulting in a decrease in the conversion rate of raw material methanol, resulting in a Raw material utilization rate is seriously insufficient
Therefore, although each catalyst has shown a certain catalytic efficiency, it still cannot achieve satisfactory methanol conversion and methyl mercaptan yield.

Method used

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  • Preparation method of catalyst

Examples

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Embodiment 1

[0024] A preparation method of catalyst, comprising the following steps:

[0025] (1) Weigh 160g of analytically pure potassium tungstate and dissolve it in 500ml of water, stir evenly, and then supplement the solution to reach the equivalent of the carrier γ-Al 2 o 3 The volume of water absorption capacity. In addition, 860 g of γ-Al was dried at 120°C for 3 hours. 2 o 3 The carrier is slowly sprinkled into this impregnation solution, and after 12 hours, it is baked in a convection oven at 450°C for 2 hours to obtain K 2 WO 4 (8%) / γ-Al 2 o 3 .

[0026] (2) Weigh 1.01g of zinc chloride and dissolve it in 99ml of water, and add 0.5mol / L hydrochloric acid solution to completely dissolve zinc chloride to obtain a zinc chloride solution with a mass concentration of 1%;

[0027] (3) Mix the above zinc chloride solution with K 2 WO 4 (8%) / γ-Al 2 o 3 Mix evenly so that the mass concentration of zinc chloride in the whole mixture is 2%, to obtain the impregnation solution;...

Embodiment 2

[0031] (1) Weigh 160g of analytically pure sodium tungstate and dissolve it in 500ml of water, stir evenly, and then supplement the solution to reach the equivalent of the carrier SiO 2 The volume of water absorption capacity. In addition, take 860g of SiO which was dried at 120°C for 3h. 2 The carrier is slowly sprinkled into this impregnation solution, and after 12 hours, it is baked in a convection oven at 450 ° C for 2 hours to obtain Na 2 WO 4 (8%) / SiO 2 .

[0032] (2) Weigh 20.0g of zinc chloride and dissolve it in 80ml of water, and add 0.5mol / L hydrochloric acid solution to completely dissolve zinc chloride to obtain a zinc chloride solution with a mass concentration of 20%;

[0033] (3) Mix the above zinc chloride solution with Na 2 WO 4 (8%) / SiO 2 Mix well so that the mass concentration of zinc chloride in the whole mixture is 20%, to obtain the impregnation solution;

[0034] (4) Ultrasonic impregnation in the impregnation solution for 30 hours at 20°C;

...

Embodiment 3

[0037] (1) Weigh 160g of analytically pure cesium tungstate and dissolve it in 500ml of water, stir evenly, and then replenish the solution to a volume equivalent to the water absorption capacity of the carrier NaY molecular sieve. In addition, 860 g of NaY molecular sieve carriers dried at 120 °C for 3 h were slowly sprinkled into this impregnation solution, and after 12 h, they were roasted at 450 °C for 2 h in a convection oven to obtain Cs 2 WO 4 (8%) / NaY.

[0038] (2) Weigh 20.0g of zinc chloride and dissolve it in 80ml of water, and add 0.5mol / L hydrochloric acid solution to completely dissolve zinc chloride to obtain a zinc chloride solution with a mass concentration of 20%;

[0039] (3) Combine the above zinc chloride solution with Cs 2 WO 4 (8%) / NaY mixes, and zinc chloride mass concentration is 20% in the whole mixture, obtains dipping solution;

[0040] (4) Impregnating the impregnation solution at 60°C for 3 hours with intermittent stirring;

[0041] (5) Dry a...

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Abstract

The invention discloses a preparation method of a catalyst, which comprises the steps of dissolving zinc chloride in water, adding a 0.5mol / L hydrochloric acid solution to allow zinc chloride to be dissolved completely, obtaining a zinc chloride solution with a mass concentration of 1%-20%, mixing the zinc chloride solution with a tungsten-base catalyst uniformly to allow a mass concentration of zinc chloride to be 2%-20% in a whole mixture, obtaining impregnation liquid, impregnating the impregnation liquid for 3-30h at 20-60 DEG C by a conventional impregnation method, drying to a constant weight at 50-150 DEG C, roasting for 1-6h at 200-600 DEG C, and then cooling to a room temperature. The method can increase a raw material conversion rate and a target product yield.

Description

Technical field [0001] The invention is a chemical technology field, which involves a method of preparation of a catalyst. Background technique [0002] The catalyst composed of the carrier and the main activity component, the carrier adopts the porous large ratio surface area, which mainly provides the activity center, increases the effective surface and provides a suitable hole structure;, Improve reaction efficiency. [0003] For example, at the beginning of the 20th century, Sabatier began to find the use of oxidation as a catalyst, which was synthesized by hydrogen sulfide and methanol, but the production rate of methalulitol was very low.Kramer and Reid further studied the catalyst of this process on the basis of Sabatier. The catalysts they adopted were also oxidized, but there are many disadvantages of this catalyst.The rate is still only 25-50%.Until the 1960s, the American Pure Oil Co developed a new aluminum oxide catalyst, which greatly increased the income and select...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J35/10B01J37/02C07C321/04C07C319/08
Inventor 刘飞曹建新林倩丛轮刚常弈王晓丹
Owner GUIZHOU UNIV
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