A kind of vanadium-phosphorus-oxygen catalyst for butane oxidation to maleic anhydride and preparation method thereof

A technology of vanadium phosphorus oxide and catalyst, which is applied in physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc. It can solve the problems of uneven grain size distribution, insufficient concentration of particle size distribution, and increased catalyst manufacturing costs. Achieve the effects of concentrated grain size distribution, uniform active center distribution, and regular crystal phase structure

Active Publication Date: 2018-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method adds a large amount of polyethylene glycol dispersants, and the obtained product has the problems of uneven grain size distribution and insufficient concentration of particle size distribution, and there is a deficiency that the raw material polyethylene glycol increases the catalyst manufacturing cost.
Although the reaction performance of the vanadium phosphorus oxygen catalyst is better, the activity and selectivity of the catalyst still need to be further improved.

Method used

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  • A kind of vanadium-phosphorus-oxygen catalyst for butane oxidation to maleic anhydride and preparation method thereof
  • A kind of vanadium-phosphorus-oxygen catalyst for butane oxidation to maleic anhydride and preparation method thereof
  • A kind of vanadium-phosphorus-oxygen catalyst for butane oxidation to maleic anhydride and preparation method thereof

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Experimental program
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preparation example Construction

[0048] (2) Preparation of vanadium phosphorus oxygen catalyst

[0049] Step (1) The obtained vanadium phosphorus oxide is first formed to obtain a vanadium phosphorus oxygen catalyst intermediate, and then activated; or the obtained vanadium phosphorus oxide is first activated to obtain a vanadium phosphorus oxygen catalyst intermediate, and then formed to obtain vanadium phosphorus oxygen catalyst.

[0050] The shape of the obtained vanadium-phosphorus-oxygen catalyst can be shapes such as pressed sheet, sphere, extruded bar, and the phase of matter of the catalyst is mainly super vanadyl phosphate ((VO 2 ) 2 P 2 o 7 )Mutually.

[0051] The above-mentioned molding process generally includes: adding vanadium phosphorus oxide powder (or activated vanadium phosphorus catalyst intermediate) to graphite powder with a mass fraction of 3% to 5%, after mixing thoroughly, using a rotary tablet press, Properly adjust the impact strength, extrude into a certain shape, such as colum...

Embodiment 1

[0058] exist figure 1 In the impingement flow reactor shown, add isobutanol, benzyl alcohol mixture 500mL, isobutanol / benzyl alcohol volume ratio 10:1, silane coupling agent A-147 0.29g, start the impingement flow reactor, make stirring The rotation speed of the paddle reaches 1500r / min, and the reaction liquid passes through the guide tube to form an impingement flow. Raise the reaction temperature and keep it at 110±2°C, mix 29.53g of vanadium pentoxide and 149mL of isobutanol and benzyl alcohol in a FSH-2 high-speed homogenizer to form a suspension, so that the concentration of 85% Phosphoric acid 44.7g and the above-mentioned suspension were added into the reactor from two inlets of the impingement flow reactor at a certain flow acceleration rate, and the reaction time was maintained for 6 hours to complete the reaction. After the reaction solution was cooled to room temperature, it was vacuum filtered, and the filter cake was rinsed three times with a small amount of iso...

Embodiment 2

[0062] exist figure 1 In the impingement flow reactor shown, add 500mL of isobutanol and benzyl alcohol mixture, the volume ratio of isobutanol / benzyl alcohol is 15:1, 0.29g of silane coupling agent A-151, and 0.3g of ferric nitrate hexahydrate , zirconium nitrate 0.5g, start the impingement flow reactor, so that the rotation speed of the stirring blade reaches 2500r / min, and the reaction liquid passes through the guide tube to form an impingement flow. Raise the reaction temperature and keep it at 100±2°C, mix 29.53g of vanadium pentoxide and 149mL of isobutanol and benzyl alcohol in a FSH-2 high-speed homogenizer to form a suspension, so that the concentration of 100% Phosphoric acid 34.98g and the above-mentioned suspension were added into the reactor from two inlets of the impingement flow reactor at a certain flow acceleration rate, and the reaction time was maintained for 6 hours to complete the reaction. After the reaction solution was cooled to room temperature, it wa...

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Abstract

The invention discloses a vanadium phosphorus oxygen catalyst and a preparation method thereof. The nano-vanadium phosphorus oxide is used as a precursor, and it is obtained by first activating and then forming or first forming and then activating; the grain size of the nano-vanadium phosphorus oxide is less than 100nm, and its grain size distribution is as follows based on volume, The proportion of <15nm particles is 9-15%, the proportion of 15-30nm particles is 62-80%, and the proportion of 30-100nm particles is 11-23%. The nano-vanadium phosphorus oxide is prepared by adding a silane coupling agent in a submerged circulating impingement flow reactor. The catalyst of the invention is used in the catalytic reaction of n-butane oxidation to prepare maleic anhydride, the conversion rate of n-butane can reach 90-95 mol%, and the selectivity of maleic anhydride can reach 75-88 mol%.

Description

technical field [0001] The invention relates to a vanadium phosphorus oxygen catalyst for preparing maleic anhydride by oxidation of butane and a preparation method thereof. The catalyst is suitable for the catalytic reaction process of preparing maleic anhydride by oxidation of n-butane. Background technique [0002] Maleic anhydride, also known as maleic anhydride for short, is an important organic chemical raw material and the third largest organic anhydride in the world after phthalic anhydride and acetic anhydride. It is widely used in petrochemical, food processing, and pharmaceutical industries. , Building materials and other industries. Its specific applications include the manufacture of unsaturated polyester resins, alkyd resins, maleic acid (maleic acid), fumaric acid (fumaric acid), as well as pesticides, coatings, glass fiber reinforced plastics, lubricating oil additives, paper chemistry Product additives, surfactants, etc. The advent of the new method of mal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/198C07D307/60
Inventor 王海波宋丽芝勾连科薛冬侯学伟范丹丹
Owner CHINA PETROLEUM & CHEM CORP
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