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A kind of denitrification aid with the effect of increasing propylene production and its preparation method

A technology of nitrification aid and propylene, which is applied in the field of denitration aid and its preparation, can solve the problems of high temperature sintering of active metal oxides, decreased activity of propylene, poor hydrothermal stability, etc., and achieves good stability, reduced temperature difference, and service life. long effect

Active Publication Date: 2021-06-22
REZEL CATALYSTS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of denitrification additive has good denitrification activity in the initial stage, but its hydrothermal stability is poor
As the reaction progresses, the high-temperature sintering of active metal oxides is serious, and the activities of desulfurization, denitrification and increasing propylene gradually decrease

Method used

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  • A kind of denitrification aid with the effect of increasing propylene production and its preparation method
  • A kind of denitrification aid with the effect of increasing propylene production and its preparation method
  • A kind of denitrification aid with the effect of increasing propylene production and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Using ammonium dihydrogen phosphate to H-ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 27), impregnated and flash-dried, and then roasted at 550 ° C for 2 hours to obtain phosphorus-containing ZSM-5 molecular sieves, and the P in the obtained molecular sieves 2 o 5 The content is 3.2wt%.

[0051] Cerium nitrate solution (containing 0.95 kg CeO 2 ) and 3.0 kilograms (dry basis) of phosphorus-containing ZSM-5 molecular sieves were added to 4 kilograms of deionized water, and stirred at high speed for 30 minutes to obtain phosphorus-containing MFI molecular sieve slurry.

[0052] Under stirring conditions, add 2.7 kg (dry basis) of kaolin and 0.9 kg (dry basis) of aluminum sol into 4 kg of deionized water, and stir at high speed for 2 hours. After the kaolin is completely dispersed in the slurry, add 1.8 kg (dry basis) ) Pseudo-boehmite, the pH of the slurry is adjusted to 2.5-3.5 by HCl, so that the pseudo-boehmite undergoes gelation reaction. After stir...

Embodiment 2

[0055] Using ammonium dihydrogen phosphate to H-ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 27), impregnated and flash-dried, and then roasted at 550 ° C for 2 hours to obtain phosphorus-containing ZSM-5 molecular sieves, and the P in the obtained molecular sieves 2 o 5 The content is 3.2wt%.

[0056] Cerium chloride solution (containing 0.6 kg CeO 2 ) and 3.0 kilograms (dry basis) of phosphorus-containing ZSM-5 molecular sieves were added to 4 kilograms of deionized water, and stirred at high speed for 30 minutes to obtain phosphorus-containing MFI molecular sieve slurry.

[0057] Under stirring conditions, add 2.3 kg (dry basis) of kaolin and 0.9 kg (dry basis) of aluminum sol into 4 kg of deionized water, and stir at high speed for 2 hours. After the kaolin is completely dispersed in the slurry, add 2.2 kg (dry basis) ) Pseudo-boehmite, the pH of the slurry is adjusted to 2.5-3.5 by HCl, so that the pseudo-boehmite undergoes gelation reaction. After stir...

Embodiment 3

[0060] Using phosphoric acid to H-ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 50), impregnated and flash-dried, and then roasted at 550 ° C for 2 hours to obtain phosphorus-containing ZSM-5 molecular sieves, and the P in the obtained molecular sieves 2 o 5 The content is 0.5wt%.

[0061] Cerium carbonate (containing 0.6 kg CeO 2 ) and 4.25 kilograms (dry basis) of phosphorus-containing ZSM-5 molecular sieves were added to 6 kilograms of deionized water, and stirred at high speed for 30 minutes to obtain phosphorus-containing MFI molecular sieve slurry.

[0062]Under the condition of stirring, add 1.6 kg (dry basis) of kaolin and 0.9 kg (dry basis) of aluminum sol into 4 kg of deionized water and stir at high speed for 2 hours. After the kaolin is completely dispersed in the slurry, add 1.8 kg (dry basis) ) Pseudo-boehmite, the pH of the slurry is adjusted to 2.5-3.5 by HCl, so that the pseudo-boehmite undergoes gelation reaction. After stirring for 30 minut...

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Abstract

The invention discloses a denitrification auxiliary agent with the effect of increasing propylene production and a preparation method thereof, and relates to the field of petroleum refining. The denitrification auxiliary agent contains 15-45wt% low-silicon-phosphorus MFI molecular sieve, 6.5-10wt% CuO, 6-16wt% %CeO 2 ; Among the Cu elements, at least one-third of CuO can be absorbed by H at 600 °C according to the amount of substances 2 reduction. The additive has the functions of flue gas denitrification and propylene yield increase in the catalytic cracking process. The additive has high stability and a very small wear index, and can be directly added to the fluid catalytic cracking unit. The additive is used in the catalytic cracking process and has the function of supplementing heat for the cracking reaction, which is beneficial to reducing the temperature difference of the catalytic cracking riser.

Description

technical field [0001] The invention relates to the field of petroleum refining, in particular to a denitrification additive with the effect of increasing propylene production and a preparation method thereof, which is applied in the catalytic cracking process. Background technique [0002] With the transformation and upgrading of the country's energy, chemical industry, and environment, the country's demand for traditional gasoline and diesel is gradually decreasing, the demand for propylene and other chemical products is gradually increasing, and the requirements for environmental protection are gradually increasing. [0003] The catalytic cracking process is an important process for converting petroleum into gasoline, diesel, propylene and other chemical products. However, there are organic nitrogen compounds in petroleum. During the catalytic cracking process, some organic nitrogen compounds will be converted into nitrogen oxides. The regeneration of catalytic cracking T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/46B01J37/02B01J37/30B01J37/08B01J37/00B01J37/10C10G47/20C10G45/12
CPCB01J23/002B01J29/46B01J37/0009B01J37/0201B01J37/08B01J37/088B01J37/10B01J37/30B01J2229/16B01J2229/183B01J2229/186C10G45/12C10G47/20C10G2300/202C10G2400/20
Inventor 卓润生施宗波刘新生张青胡泽松
Owner REZEL CATALYSTS CORP
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