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Catalyst for producing propenal with direct oxidation of propylene and method of producing the same

A catalyst, acrolein technology, used in the preparation of organic compounds, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc.

Inactive Publication Date: 2009-04-08
重庆紫光海力催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the industrial production of acrolein as the main product, it is necessary to further improve the selectivity of acrolein while maintaining the high activity of the catalyst. The results of high acrolein selectivity reported by some foreign patents are only at low space velocity Only the single-tube test results under industrial conditions are really reliable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] 1. Preparation of catalyst (I) Mo-W-Bi-Fe-Co-Cs-Si-O. fine powder

[0022] Dissolve 2442.6 grams of ammonium heptamolybdate and 162 grams of ammonium paratungstate into 2500 grams of water, and the solution is liquid A; add 584 grams of bismuth nitrate to 1600 grams of water and 120 grams of concentrated nitric acid, add 1750 grams of cobalt nitrate to 500 grams of water, and add 729 grams of bismuth nitrate to 500 grams of water. Ferric nitrate was added to 600 grams of water. After the three nitrates are dissolved, they are mixed to become liquid B. Liquid B is dripped into liquid A at 60°C under stirring. After stirring for 30 minutes, liquid C is obtained. Dissolve 5.2 g of cesium nitrate in 20 g of water and 356.26 g of cesium nitrate Add 20% concentration of silica sol into solution C. After continuing to stir for 30 minutes, heat up and evaporate, dry, and treat the dried material at 350° C. for 2 hours, and then grind it into a fine powder below 50 μm.

[0023...

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PUM

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Abstract

The invention relates to a catalyst for producing acrolein through direct oxidation of propylene, which is obtained by kneading, molding, drying and baking a cesium-containing catalyst (I) and a potassium-containing catalyst (II) which are mixed according to the mass percentages of between 10 and 50 percent of the catalyst (I) and to between 50 and 90 percent respectively. The catalysts (I) and (II) are as follows: the catalyst (I) comprises Moa, Wb, Bic, Fed, (Co and / or Ni)e, Sif, Csg, an Ox, while the catalyst (II) comprises Moa, Wb, Bic, Fed, (Co or / and Ni)e, Sif, Kg, and Ox, wherein the subscripts a, b, c, d, e, f, g, and x are atomic numbers of corresponding elements, and a is between 10 and 12, b is between 0 and 2, a plus b is equal to 12, c is between 0.5 and 2, d is between 0.5 and 2, e is between 3 and 6, f is between 1 and 3, g is between 0.01 and 0.3, and x is the summation of oxygen atomic numbers of oxides of the corresponding elements. The one-way conversion rate of the propylene for the catalyst for the propylene is more than or equal to 97 percent, and the one-way yield of the acrolein is more than or equal to 85 percent.

Description

1. Technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a gas-phase catalytic oxidation catalyst and a preparation method thereof, in particular to a catalyst for the direct oxidation of propylene to produce acrolein and a preparation method thereof. 2. Background technology [0002] The gas-phase catalytic oxidation of propylene has already been industrialized. When the main product is acrolein, acrylic acid is a by-product. In most cases, acrolein is only the first reaction product of the gas-phase two-step catalytic oxidation of propylene to produce acrylic acid. In the above two cases, there is basically no difference as a catalyst for the gas-phase catalytic oxidation of propylene, which is a catalytic system based on Mo-Bi-Co-Fe (or Mo-Bi-Ni-Fe), and all For ingredients containing alkali metals, potassium salts are used. The preparation method of the catalyst mainly adopts the solution mixing precipitation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C07C47/22C07C45/35
Inventor 刘国同刘鹏孙怀义吴海晖
Owner 重庆紫光海力催化剂有限公司
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