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A kind of low carbon olefin oxidation catalyst and preparation method

A technology for oxidation catalysts and low-carbon olefins, which is applied in the fields of hydrocarbon oxidation to prepare oxygenated compounds, carbon-based compounds, chemical instruments and methods, etc. good stability

Active Publication Date: 2017-06-06
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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  • A kind of low carbon olefin oxidation catalyst and preparation method
  • A kind of low carbon olefin oxidation catalyst and preparation method
  • A kind of low carbon olefin oxidation catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of Catalyst 1

[0042] Under stirring conditions, dissolve 169.5 grams of ammonium molybdate in 1000 ml of pure water (water temperature above 65°C) to obtain a slurry (1), then take 76.8 grams of cobalt nitrate, 40.4 grams of iron nitrate, 58.2 grams of nickel nitrate, and 3.7 grams of magnesium nitrate Dissolve in 500ml of purified water (water temperature above 65°C), stir and mix well to obtain slurry (2). Another 77.6 g of bismuth nitrate was taken and dissolved in dilute nitric acid with stirring to obtain a slurry (3). Then, the slurry (1) is mixed with the slurry (2) to obtain the slurry (4), then the slurry (3) is added to the slurry (4), and 56 grams of antimony trioxide is added to obtain the active component slurry (a). Add 10.1 grams of silica powder and 4 grams of graphite to the active component slurry (a), stir vigorously at 80°C for 2 hours for co-precipitation reaction, heat and dry, heat-treat at 160°C for 3 hours in nitrogen, and dry at ...

Embodiment 2

[0048] Catalyst (I) is identical with the preparation steps and main raw material of embodiment 1 catalyst 1, obtains catalyst (I) through roasting at 560 ℃ for 3 hours, and main composition is:

[0049] Mo 12 Bi 5 Fe 4 co 5 Ni 1.5 Sb 0.8 Si 1.2 Sr 0.1 La 0.5 B 0.1 o x , take catalyst (I) 92 parts, strontium titanate oxide 5.5 parts, lanthanum cerium zirconium oxide solid solution Ce 0.5 Zr 0.4 La 0.2 o 2 2.5 parts, added deionized water, kneaded in a kneader, extruded into hollow columnar particles of φ4.5×5mm, dried at 120°C, and calcined at 550°C for 4 hours to obtain Catalyst 2.

Embodiment 3

[0051] 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 400°C for 10 hours. The main components are: Mo 12 Bi 0.8 Fe 3 co 8 Ni 4 Sb 2 Si 0.8 Ti 0.5 Ca 0.2 o x , Take 97 parts of catalyst (Ⅰ), 3 parts of strontium titanate 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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PUM

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Abstract

The invention relates to a multi-metal oxide catalyst which is used in a low-carbon olefin selectively oxidization reaction of unsaturated aldehyde and unsaturated acid in proportions. The catalyst includes elements of molybdenum, bismuth, iron, cobalt, nickel and antimony. The catalyst also includes strontium titanate. The oxidizing catalyst is prepared by (1) mixing a compound (I) containing molybdenum and bismuth with the strontium titanate according to mass percentage ratios of 90-98% and 0.3-9%, (2) kneading the mixture, (3) moulding the catalyst, (4) drying the catalyst and (5) roasting the catalyst. The oxidizing catalyst is not liable to cause loss of active components is not liable to cause phase change in an active phase, is high in reaction activity and selectivity and is long in service life.

Description

technical field [0001] The present invention relates to a low-carbon olefin oxidation catalyst and a preparation method, more specifically, to a multi-metal oxide catalyst, which is used to catalyze the oxidation of propylene to produce acrolein or the oxidation of isobutene to produce isobutyraldehyde. Background technique [0002] Industrially, the reaction device for oxidizing propylene or isobutene to prepare corresponding unsaturated aldehydes and acids 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 are maximized to save propylene If the conversion rate of raw materials, acrolein, and acrylic acid yields are increased by 0.1-0.5 percentage points, the amount of products obtained will increase by hundreds to thousands of tons, and the economic benefits will be considerable. [0003] The catalysts for the partial oxidation of propyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887C07C45/35C07C47/22C07C27/14
Inventor 王学丽翟月勤吴毅刘俊保李晓银景志刚王芳耿占杰黄世英高杜娟杨红强贾慧青南洋陈红
Owner PETROCHINA CO LTD