Catalyst used for preparation of maleic anhydride through oxidation of butane, and preparation and application methods thereof

A catalyst and butane technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic chemistry, etc., can solve the problems of general catalyst strength, difficult catalyst loading, and influence on the yield and quality of maleic anhydride products. The conversion rate of raw materials and the yield of maleic anhydride, the realization of double hot-spot operation, and the effect of improving the processing capacity of raw materials

Inactive Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The temperature of the salt bath used for catalyst evaluation is high, the heat dissipation is slow, and it is difficult to increase the catalyst load;
[0006] 2. The strength of the catalyst is average, and the service life will be reduced;
[0007] 3. The activity and selectivity of the catalyst need to be further improved
[0008] When the butane feed concentration is increased, the yield and quality of the maleic anhydride product are greatly affected due to the poor activity and stability of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 37.18g V to the reactor 2 o 5 , 3.30g zinc sulfate, 0.60g MoO 3 , 1.3g of titanium oxide, 3ml of concentrated hydrochloric acid and a mixture of 350ml of isobutanol and 50ml of benzyl alcohol, adding concentrated phosphoric acid with a concentration of 105%, heating up to 105°C for reflux, adding 0.1g of rare earth metal additive Er, and continuing to reflux, A lake blue solution was obtained, cooled to room temperature, washed with a mixture of isobutanol and benzyl alcohol, filtered, and then dried at 90-150°C to obtain precursor A-1.

[0039] Weigh 100g of the above precursor, 10g of graphite, appropriate amount of polyvinyl alcohol glue, add water to mix the above materials into a paste, and shape it into a hollow cylindrical catalyst cat-1 on a model machine, with a size of Ф6*4*2mm.

[0040] The above-mentioned catalyst is activated, the catalyst is loaded into the reactor, and a mixture of 0.5% n-butane and air is introduced, and the space velocity is 500h ...

Embodiment 2

[0043] According to the method of embodiment 1, prepare the catalyst of section A, just add the amount of concentrated phosphoric acid and become 1.05 times, add auxiliary agent and change W from Mo, add the amount of ammonium metatungstate to be 26.4g, the oxide compound of titanium becomes zirconium The compound is added in an amount such that the zirconium oxide content accounts for 4% (substance mass) of the vanadium oxide content, and the rest of the conditions remain unchanged to prepare the catalyst precursor A-2. 150g of precursor A-2, 25g of molding aid graphite, and an appropriate amount of water were mixed and put into the extruder to form the A-stage catalyst.

[0044] The phosphorus content of the B-stage catalyst was reduced to 0.8 times that of the A-stage, and then no additives were added to prepare the catalyst precursor B-2.

[0045] 150g of B-2, 25g of graphite as a forming aid, and an appropriate amount of water are mixed and put into an extruder to form a ...

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PUM

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Abstract

The invention relates to a catalyst used for preparation of maleic anhydride through oxidation of butane. The catalyst is a double-section bed catalyst and is divided into an inlet-side A-section catalyst and an outlet-side B-section catalyst, wherein the A-section catalyst comprises a V-P-O series catalyst precursor and third, fourth, fifth and sixth promoters; the B-section catalyst comprises a V-P-O series catalyst and third, fourth, fifth and sixth promoters; and the content of P in the B-section catalyst is 0.8 to 1 time of the content of P in the A-section catalyst.

Description

technical field [0001] The invention relates to a double-stage bed catalyst for preparing maleic anhydride, in particular to a catalyst composed of V-P-O and a promoter metal and its preparation and use method. Background technique [0002] As we all know, maleic anhydride (also known as maleic anhydride, referred to as maleic anhydride) is an important organic chemical raw material, and it has become the second largest organic anhydride after phthalic anhydride. At present, it is widely used in the preparation of various unsaturated polyesters, coatings, food, pesticides, medicine and textile industries. The market demand for maleic anhydride is increasing. In recent years, the output of maleic anhydride in my country is also growing rapidly. The output reaches nearly 1 million tons / year. [0003] The production methods of maleic anhydride mainly include benzene method and butane method. Because the current price of butane raw materials is lower than that of benzene raw ma...

Claims

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Application Information

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IPC IPC(8): B01J27/198C07D307/60
Inventor 陈雅萍张明森贾雪飞师慧敏张东顺
Owner CHINA PETROLEUM & CHEM CORP
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