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Method of regenerating maleic anhydride fluidized-bed catalyst produced from n-butane oxidation

A maleic anhydride fluidized bed, fluidized bed catalyst technology, applied in catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of not providing catalyst powder regeneration method for preparing catalyst and other problems, to achieve the effect of saving catalyst costs, reducing costs and reducing pollution

Active Publication Date: 2009-07-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Most of the above-mentioned patents provide the research and preparation of catalyst precursors and the molding methods of fluidized bed catalysts, and do not provide the method of regenerating and preparing catalysts for the catalyst powders that still have certain activity produced in the fluidized bed method production process. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 55.76 g V 2 o 5 , 0.883 g MoO 3 , 3.99ml concentrated H 2 SO 4 Stir with 600ml of isobutanol, heat up to reflux at about 92°C, and add 105% H2O into the bottle after reflux for 1 hour 3 PO 4 81.20 grams of solution, now the solution was lake blue, and then refluxed for 6 hours, added 0.117 grams of Er in the bottle 2 o 3 , and continued to reflux for 3 hours to obtain a lake blue suspension, which was cooled to 40°C and filtered with a Buchner funnel, and the remaining filter cake was washed with a total of 350ml of isobutanol in three equal parts, and then the washed filter cake was After drying at 90°C, the fluidized bed catalyst precursor matrix powder is obtained.

[0053] Add 200ml of distilled water to a 500ml beaker, add 40 grams of oxalic acid, heat to dissolve, add 33.3 grams of V 2 o 5 , 3.71 g ZnSO 4 .7H 2 O, 1.16 gram of ammonium molybdate, 0.4 gram of ammonium bicarbonate are stirred until dissolving, adding concentration is 85% H 3 PO 4 36...

Embodiment 2

[0056] The preparation steps and dosage of fluidized bed catalyst precursor matrix powder are the same as in Example 1.

[0057] Auxiliary material preparation steps, charging amount are the same as embodiment 1.

[0058] The preparation steps of the fluidized bed catalyst are the same as those in Example 1, except that the amount of matrix powder added to the fluidized bed catalyst precursor is 80 grams.

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Abstract

The present invention relates to a renovation process of fluidized-bed catalyst for oxidation of n-butane to maleic anhydride, which comprises the steps of: preparing precursor matrixes powder and assistant material used for raw catalyst; mixing the fine catalyst captured by the fluidized-bed device with the prepared precursor matrixes powder and assistant material; adding water soluble resin glue and agitating under the condition of aqueous thermostat; finally forming by spray drying to obtain regenerated catalyst. The regenerated catalyst of the present invention can be complemented, replacing raw catalyst, into the fluidized-bed reactor, and is equivalent with raw catalyst in activity, grain size, and intension, etc,.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for preparing maleic anhydride (maleic anhydride for short) by n-butane oxidation, in particular to a preparation method of a V-P-O series metal oxide catalyst for maleic anhydride synthesis. Background technique [0002] Maleic anhydride is an important organic chemical raw material. At present, it is widely used in unsaturated resin, paint, food, pesticide, medicine, textile and other industries, and the market demand for maleic anhydride is increasing day by day. [0003] The early production and development of maleic anhydride used benzene as the raw material. Due to the high price and high toxicity of benzene, which does not meet the increasingly stringent environmental protection requirements of today, the limitations gradually emerged. [0004] In order to solve the defects of the traditional process of synthesizing maleic anhydride with benzene as raw material, a process route with n-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/198B01J38/00C07D307/60
CPCY02P20/584
Inventor 杨林松林杰斌任建寅刘振辉姚青
Owner CHINA PETROLEUM & CHEM CORP
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