Catalyst for preparing maleic anhydride from n-butane through oxidation and preparation method thereof

A catalyst, n-butane technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high compressive strength, low compressive strength, low wear rate, etc. The effect of high compressive strength, low wear rate and low wear rate

Active Publication Date: 2018-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is to solve the problem of low lateral compressive strength and high wear rate of catalyst structures in the prior art, and discloses a catalyst for producing maleic anhydride by oxidation of n-butane. The catalyst precursor is treated under wet conditions, and the catalyst with high lateral compressive strength and low wear rate is obtained after adding a pore-forming agent and performing second compression.

Method used

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  • Catalyst for preparing maleic anhydride from n-butane through oxidation and preparation method thereof
  • Catalyst for preparing maleic anhydride from n-butane through oxidation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 0.5 g of cobalt oxalate with 120 mL of benzyl alcohol and 360 mL of isobutanol, then add 50.4 g of vanadium pentoxide, and then add 65 mL of phosphoric acid. After heating and refluxing for 16 hours under continuous stirring, the resultant product is filtered and dried to obtain VPO catalyst precursor powder , The powdered catalyst precursor was sieved, and 50g of the precursor smaller than 200 mesh was taken and mixed with 1.5g of graphite powder to form a mixture A; the above mixture A was kept at a temperature of 30°C and a constant humidity of 85%. Treated in an oven for 12h; then press tablets under 20MPa pressure to obtain a one-time shaped catalyst structure; then crush it, sieving, and take 80-140 mesh parts; transfer the above-mentioned pre-granulated particles to a rotary tablet press, and the catalyst structure The height of the material is 5mm, and the catalyst structure is obtained. The lateral compressive strength is 132N / cm and the attrition rate is 2.3...

Embodiment 2

[0026] Mix 0.5 g of cobalt oxalate with 120 mL of benzyl alcohol and 360 mL of isobutanol, then add 50.4 g of vanadium pentoxide, and then add 65 mL of phosphoric acid. After heating and refluxing for 16 hours under continuous stirring, the resultant product is filtered and dried to obtain VPO catalyst precursor powder , The powdered catalyst precursor was sieved, and 50g of the precursor smaller than 200 mesh was taken and mixed with 1.5g of graphite powder to form mixture A; adding 5g of pore former stearic acid to the above mixture A, at a temperature of 30℃ , The equivalent humidity is 85% in a constant temperature and humidity oven for 12h; then press tablets under a pressure of 20MPa to obtain a once-shaped catalyst structure; then crush it, sieving, and take the 80-140 mesh part; the above-mentioned pre-granulation The particles were transferred to a rotary tablet press. The height of the catalyst structure was 6mm to obtain a catalyst structure. The lateral compressive s...

Embodiment 3

[0028] Mix 0.5 g of cobalt oxalate with 120 mL of benzyl alcohol and 360 mL of isobutanol, then add 50.4 g of vanadium pentoxide, and then add 65 mL of phosphoric acid. After heating and refluxing for 16 hours under continuous stirring, the resultant product is filtered and dried to obtain VPO catalyst precursor powder , The powdery catalyst precursor is sieved, and 50g of the precursor smaller than 200 mesh is taken, and 1.5g of graphite powder is thoroughly mixed to form a mixture A; the above mixture A is at a temperature of 30℃ and a corresponding humidity of 85% at a constant temperature and humidity Treat it in an oven for 12h; then press tablets under 20MPa pressure to obtain a one-time shaped catalyst structure; then crush it, sieving, and take the 80-140 mesh part as pre-granulated particles; add the above-mentioned pre-granulated particles to pores 5g of stearic acid was transferred to a rotary tablet press. The height of the catalyst structure was 5mm to obtain a cata...

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Abstract

The invention relates to a catalyst for preparing maleic anhydride from n-butane through oxidation. The catalyst mainly overcomes the problem of low catalytic activity in the prior art. According to the invention, three elements consisting of vanadium, phosphorus and oxygen are used as the main body of the catalyst, and a certain amount of a metal additive is cooperatively used. The catalyst comprises, by weight, 26 to 35% of elemental vanadium, 14 to 20% of elemental phosphorus, 30 to 50% of elemental oxygen and 0.02 to 7% of the metal additive. The catalyst is subjected to constant-temperature constant-humidity treatment, doping of a pore forming agent and secondary molding, so the catalysis performance and strength of the catalyst are improved, and the catalyst is applicable to the field of preparation of maleic anhydride from n-butane through oxidation.

Description

Technical field [0001] The invention relates to a catalyst for preparing maleic anhydride by oxidation of n-butane and a preparation method thereof. Background technique [0002] Maleic anhydride, referred to as maleic anhydride, also known as maleic anhydride, is a commonly used and important organic chemical raw material. It is the third largest type of anhydride in the world in consumption after phthalic anhydride and acetic anhydride. Maleic anhydride is widely used in petrochemical, food chemical, pharmaceutical, building materials and other industries, mainly used to synthesize unsaturated polyester resin, lubricant additives, food additives, 1,4-butanediol (BDO), γ-butane A series of important organic chemicals and fine chemicals such as esters (GBL) and tetrahydrofuran (THF). [0003] The early production of maleic anhydride was prepared by selective oxidation of benzene, but due to the hazards of benzene to the human body and the environment, as well as the impact of econ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/198C07D307/60
CPCB01J27/198B01J35/026B01J37/0009C07C51/215C07D307/60
Inventor 赵欣顾龙勤曾炜徐俊峰陈亮王丹柳
Owner CHINA PETROLEUM & CHEM CORP
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