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A kind of hydrocarbon oxidation catalyst and preparation method thereof

An oxidation catalyst and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc., can solve the problems of easy falling off of catalyst active components, poor working environment for workers, long induction period of catalytic economy, etc., to achieve The effect of improving the working environment of workers, increasing the utilization rate of raw materials, and shortening the induction period

Active Publication Date: 2017-06-06
DALIAN DRAGON WIN CATALYTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liu Xianguo invented the patent "a catalyst for the production of maleic anhydride by benzene oxidation" (public announcement number: CN103816931A). The spraying temperature of the catalyst is 210°C, and the raw material utilization rate of the catalyst is about 66%. It can be seen from the above industrial catalyst patents The loss of catalyst raw materials prepared by high-temperature spraying method is serious, which increases environmental pollution, and the active components of the catalyst are easy to fall off, the induction period of catalytic economy is long, and the working environment of workers is relatively harsh

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Catalyst preparation

[0009] Dissolve 144.0g oxalic acid in water, then add 99.20g ammonium metavanadate under heating and stirring until the ammonium metavanadate is completely dissolved, then add 60.00g ammonium molybdate, 3.80g ammonium dihydrogen phosphate, 1.76g nickel nitrate, 6.19g Sodium nitrate, heat until completely dissolved. The obtained slurry is sprayed and granulated in a spray dryer, the catalyst particles are collected by a cyclone separator, the inlet temperature of the dryer is 150±5°C, and the spray gun pressure is 0.2Mpa. The collected catalyst particles are activated in a fluidized bed activation furnace, and the activation temperature rise program is: at a rate of 2°C / min to 450°C and keep it at this temperature for 6 hours, and then naturally drop to room temperature. Add the activated catalyst active material and 30g of titanium dioxide to 500ml of deionized water, and add 35g of white glue, and use a homogenizing pump to disperse and emulsify. T...

Embodiment 2

[0013] Dissolve 148.00g of oxalic acid in water, then add 101.97g of ammonium metavanadate under heating and stirring until completely dissolved, then add 47.43g of ammonium molybdate, 4.38g of ammonium dihydrogen phosphate, 1.81g of nickel nitrate, and 6.36g of sodium nitrate. Heat Until completely dissolved. The obtained slurry is sprayed and granulated in a spray dryer. The catalyst particles are collected by a cyclone separator. The inlet temperature of the dryer is 120±10℃, and the spray gun pressure is 0.3Mpa; the collected catalyst particles are placed in a fluidized bed The activation is carried out in the activation furnace, and the activation temperature rising program is as follows: at a rate of 2°C / min to 450°C and keep it at this temperature for 6 hours, and then naturally drop to room temperature. Add the activated catalyst active material and 33.0g of titanium dioxide into 500ml of deionized water, and add 35g of white glue, and use a homogenizing pump for emulsi...

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Abstract

The invention discloses a hydrocarbon oxidation catalyst and a preparation method thereof, in particular to a catalyst for preparing maleic anhydride by using benzene as a raw material through gas-solid phase catalytic oxidation reaction. The catalyst is prepared by using a salt or oxide containing V, Mo, Ti, P, Na, Ni as a precursor to prepare a solution or suspension, drying, activating, homogeneously emulsifying, and spraying. The invention solves the problems of long induction period of existing catalysts, easy fall-off of active substances, low utilization rate of catalyst raw materials, poor working environment for workers and serious environmental pollution.

Description

Technical field [0001] The invention belongs to the preparation and application of a hydrocarbon oxidation catalyst, and particularly refers to a catalyst for the oxidation of benzene to prepare maleic anhydride. Background technique [0002] Maleic anhydride is an important organic chemical raw material. It is the third largest acid anhydride in consumption after acetic anhydride and phthalic anhydride. It is mainly used in the synthesis of diene, pharmaceuticals, pesticides, dye intermediates and the preparation of polyester resins, alkyd resins, and horses. Lai acid, etc., have a wide range of applications and huge market demand. [0003] At present, domestic maleic anhydride manufacturers mainly use benzene as the raw material to produce maleic anhydride, and maleic anhydride catalyst manufacturers use high-temperature spraying methods to prepare catalysts. For example, the patent "High-load and high-yield catalyst for the gas phase oxidation of benzene to maleic anhydride" (a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/199C07D307/60
Inventor 刘竖毅董军营
Owner DALIAN DRAGON WIN CATALYTIC
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