Method for preparing a catalyst for partial oxidation of propylene

A catalyst and propylene technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as volatilization, reduced catalyst life, and deactivation of active components

Inactive Publication Date: 2005-01-12
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Complete oxidation at elevated temperature as CO and CO 2 The generation of , will reduce the selectivity to acrolein
Moreover, increased reaction temperature will cause deactivation and volatilization of active ingredients and will reduce the lifetime of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 400 ml of distilled water was introduced into a 500 cc glass reactor and stirred while heating to 75°C. 300 g of citric acid was dissolved in the resulting solution. 100 g of ammonium molybdate, 19.7 g of iron nitrate, and 54.95 g of cobalt nitrate were sequentially added to dissolve them completely. In the resulting solution, a nitric acid solution of 34.35 g of bismuth nitrate and 0.286 g of potassium nitrate was added, and dried in a rotary vacuum drier. The dried catalyst cake was recovered and ground to a size of 40 mesh to obtain a catalyst powder. The combined catalyst powders were calcined at 450° C. for 5 hours in a sintering furnace to obtain a catalyst. Calcination is carried out in the presence of air.

[0022] The composition of the catalyst is Mo 12 Bi 1.5 co 4.4 Fe 2 K 0.06 .

Embodiment 2

[0027] 400 ml of distilled water was introduced into a 500 cc glass reactor and stirred while heating to 75°C. 400 g of maleic acid was dissolved in the resulting solution. 100 g of ammonium molybdate, 39.4 g of iron nitrate, and 60.44 g of cobalt nitrate were sequentially added to dissolve them completely. In the resulting solution, a nitric acid solution of 34.35 g of bismuth nitrate and 0.286 g of potassium nitrate was added, and dried in a rotary vacuum drier. The drying and calcination steps are the same as in Example 1.

[0028] The composition of the catalyst is Mo 12 Bi 1.5 co 4.4 Fe 2 K 0.06 .

Embodiment 3

[0030] The catalyst was prepared in the same manner as in Example 1, except that 300 g of oxalic acid was used.

[0031] The composition of the catalyst is Mo 12 Bi 1.5 co 4.4 Fe 2 K 0.06 .

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PUM

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Abstract

The present invention relates to a method for preparing a catalyst for partial oxidation of propylene, particularly a method for preparing a catalyst for preparing an acrylic acid, using an organic acid such as a citric acid, maleic acid and oxalic acid. The complex oxide catalyst according to the invention, when used in the gas phase catalytic oxidation of propylene, may produce acrolein in high yield.

Description

field of invention [0001] The present invention relates to a catalyst for use in a process for the preparation of acrolein and acrylic acid by reacting propylene with a gas containing air or oxygen. Background of the invention [0002] Acrylic acid is prepared by partial oxidation of propylene followed by oxidation of the resulting acrolein. This process is carried out at the lowest possible oxygen concentration in order to maintain a high acrolein or acrylic acid selectivity, and to avoid combustion and prevent overreaction due to increased oxygen concentration in the reactants. Complete oxidation at elevated temperature as CO and CO 2 The generation of acrolein will reduce the selectivity to acrolein. Also, increased reaction temperature can cause deactivation and volatilization of active ingredients and can reduce the lifetime of the catalyst. Therefore, catalysts for the production of acrylic acid will be of higher commercial value if they have higher activity and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/84B01J23/887B01J37/02C07C51/25
CPCB01J23/002B01J23/8876B01J37/0236B01J2523/00C07C51/252B01J23/84B01J37/02
Inventor 姜廷和李源镐吉珉镐申铉钟崔柄烈柳渊植崔溶贤朴柱渊
Owner LG CHEM LTD
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