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Propylene selective oxidation catalyst and preparation method thereof

A catalyst and selective technology, which can be used in hydrocarbon oxidation to prepare oxygenated compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve problems such as difficult and accurate control.

Active Publication Date: 2015-05-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tungsten bias on the surface side of the catalyst, and / or copper bias on the core side of the catalyst is difficult to accurately control

Method used

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  • Propylene selective oxidation catalyst and preparation method thereof
  • Propylene selective oxidation catalyst and preparation method thereof
  • Propylene selective oxidation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Under stirring conditions, dissolve 236.5 grams of ammonium molybdate in 1000 ml of pure water (water temperature above 65°C) to obtain a slurry (1), then take 89.1 grams of cobalt nitrate, 64 grams of nickel nitrate, 115.9 grams of iron nitrate, and 22.3 grams of copper nitrate 1. Dissolve 34.2 g of lanthanum nitrate in 500 ml of purified water (water temperature above 65° C.), stir well and mix evenly to obtain slurry (2). Take 162.5 g of bismuth nitrate and dissolve it in dilute nitric acid with stirring to obtain slurry (3). Then, the slurry (1) is mixed with the slurry (2) to obtain the slurry (4), and then the slurry (3) is added to the slurry (4), and then 3.8 grams of titanium dioxide and 4 grams of graphite are added to obtain the active component slurry (a) . The active component slurry (a) was co-precipitated with 7.4 grams of silica powder, heated and dried, heat-treated at 150°C for 3 hours in nitrogen, then calcined at 500°C for 4 hours, crushed, ground, ...

Embodiment 2

[0041] The preparation steps and most of the raw materials are the same as that of the catalyst 1 in Example 1, and the catalyst (I) is obtained by roasting at 500 ° C for 4 hours, and the main composition is: Mo 13 Bi 4.2 Fe 4 Ni 3 co 3.6 Cu 0.3 Si 2.2 Ba 0.3 K 0.4 o y (I). Take 90 parts of catalyst (Ⅰ), 10 parts of magnesium lanthanum aluminate oxide, add deionized water and knead in a kneader, extrude into hollow columnar particles of φ4.5×5mm, dry at 120°C, and dry at 550°C Calcined for 4 hours to obtain catalyst 2.

Embodiment 3

[0043] The preparation steps and main raw materials are the same as those of catalyst 1 in Example 1, and the catalyst (I) is obtained by calcining at 450°C for 5 hours. The main components are: Mo 14 Bi 5 Fe 2.5 Ni 4 co 4 Cu 2 Si 3.5 K 0.2 La 1.8 o y (I). Take 95 parts of catalyst (Ⅰ), 5 parts of magnesium lanthanum aluminate oxide, add deionized water and knead in a kneader, extrude into hollow columnar particles of φ4.5×5mm, dry at 120°C, and dry at 550°C Calcined for 4 hours to obtain catalyst 3.

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Abstract

The invention relates to a multi-metal oxide catalyst which contains following elements: molybdenum, bismuth, iron, nickel, cobalt and copper. The catalyst is represented as following general formula (I): Mo<a'>Bi<b'>Fe<c'>Ni<d'>Co<e'>Cu<f>Si<h>AB<j>O<y>. The catalyst also contains a magnesium lanthanum aluminate oxide. The catalyst is used in a selective oxidation reaction of olefin. The active components, the molybdenum and the like, are not liable to loss due to sublimation and an active phase is not liable to cause phase transformation. The catalyst is high in reaction activity and selectivity and is long in service life.

Description

technical field [0001] The invention relates to a multi-metal oxide catalyst, which is used for catalyzing the selective oxidation of propylene to produce acrolein. Background technique [0002] At present, acrylic acid is mainly prepared by two-step oxidation of propylene in industry. First, propylene is catalyzed in the gas phase to oxidize acrolein, and then acrolein is oxidized to acrylic acid. [0003] The industrial reaction device for oxidizing propylene to produce acrolein is mainly composed of multiple reaction tubes. On the premise of ensuring that the catalyst is not sintered and has a long service life, the selectivity and the yield of the target product should be improved as much as possible to save raw materials. If the conversion rate of raw materials, Even if the yield of acrolein and acrylic acid is increased by 0.1 to 0.5 percentage points, the amount of the obtained product will increase by hundreds to thousands of tons, and the economic benefits are consi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/887C07C47/22C07C45/35C07C27/14
Inventor 王学丽张忠东翟月勤王芳耿占杰贾慧青王春龙景志刚笪敏峰高杜娟林宏吴毅李晓银范国宁陈红
Owner PETROCHINA CO LTD
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