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Catalytic cracking aid for increasing propylene yield, and preparation method thereof

A technology of catalytic cracking additives and additives, which is applied in the direction of catalytic cracking, hydrocarbon cracking to produce hydrocarbons, and molecular sieve catalysts. It can solve the problems of low propylene selectivity, low propylene concentration, high yield of dry gas and coke, and achieve good Catalytic cracking performance, effect of improving propylene yield and propylene selectivity

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zeolite materials and catalysts disclosed in the prior art are used as additives in the catalytic cracking process. The selectivity of propylene is not high, and the concentration of propylene in the liquefied gas is low. The existing molecular sieves with MFI structure modified by phosphorus and transition metals are used in catalytic cracking. Production of propylene with high dry gas and coke yields

Method used

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  • Catalytic cracking aid for increasing propylene yield, and preparation method thereof
  • Catalytic cracking aid for increasing propylene yield, and preparation method thereof
  • Catalytic cracking aid for increasing propylene yield, and preparation method thereof

Examples

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Embodiment approach

[0034] A specific embodiment, based on the dry basis weight of the phosphorus-aluminum inorganic binder, the phosphorus-aluminum inorganic binder includes Al 2 o 3 15-40% by weight aluminum component, with P 2 o 5 45-80% by weight of the phosphorus component and 0-40% by weight of the first clay based on dry weight, and its P / Al weight ratio is 1.0-6.0, the pH value is 1-3.5, and the solid content is 15- 60% by weight; for example including Al 2 o 3 15-40% by weight aluminum component, with P 2 o 5 A phosphorus component of 45-80% by weight and a first clay of 1-40% by weight on a dry basis; preferably containing Al 2 o 3 15-35% by weight of the aluminum component, as P 2 o 5 50-75% by weight of the phosphorus component and 8-35% by weight of the first clay on a dry basis, the P / Al weight ratio is preferably 1.2-6.0, more preferably 2.0-5.0, and the pH is preferably 1.5 -3.0.

[0035] Another specific embodiment, based on the dry basis weight of the phosphorus-alumi...

Embodiment 1

[0079] Crystallized ZSM-5 molecular sieve (produced by Catalyst Qilu Branch Company, synthesized without amine method, n(SiO 2 ) / n(Al 2 o 3 )=27) filter out mother liquor, wash with water to Na 2 O content is lower than 3.0% by weight, filter to obtain filter cake; Take above-mentioned molecular sieve 100g (dry basis) and add in 1000g 2.0% NaOH solution, heat up to 65 ℃, after reacting for 30min, after rapidly cooling to room temperature, filter, wash to filtrate neutral. Then, add 800g water to the filter cake to make a slurry, add 40g NH 4 Cl, heated to 75°C, exchanged for 1h, to Na 2 O content is lower than 0.2% by weight, filters, washes, obtains molecular sieve filter cake; Get above-mentioned molecular sieve 50g (dry basis) and add water and be mixed with the molecular sieve slurry of solid content 10% by weight, add oxalic acid 4g in stirring, then 45g hydrochloric acid (mass fraction 10%) and 30g of fluosilicic acid (mass fraction 3%) were added in parallel, and t...

Embodiment 2

[0099] Crystallized ZSM-5 molecular sieve (produced by Catalyst Qilu Branch Company, synthesized without amine method, n(SiO 2 ) / n(Al 2 o 3 )=27) filter out mother liquor, wash with water to Na 2 O content is lower than 3.0% by weight, filter to obtain filter cake; Get above-mentioned molecular sieve 100g (dry basis) and add in 1500g 2.3% NaOH solution, heat up to 60 ℃, after reacting for 45min, after rapidly cooling to room temperature, filter, wash to filtrate neutral. Then, add 800g water to the filter cake to make a slurry, add 40g NH 4 Cl, heated to 75°C, exchanged for 1h, to Na 2 O content is lower than 0.2% by weight, filters, washes, obtains molecular sieve filter cake; Get above-mentioned molecular sieve 50g (dry basis) and add water and be mixed with the molecular sieve slurry of solid content 10% by weight, add citric acid 4g in stirring, then 10g sulfuric acid (mass fraction 10%) and 45g of fluosilicic acid (mass fraction 3%) were added in parallel, and the ad...

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Abstract

The present discloses a catalytic cracking aid for increasing propylene yield, and a preparation method thereof, wherein the catalytic cracking aid comprises 10-75 wt% of a phosphorus-containing MFI structure molecular sieve (calculated as the dry base weight), 3-40 wt% of a phosphorus-aluminum inorganic binder (calculated as the dry base weight), 1-30 wt% of other inorganic binder (calculated asthe oxide), and 0-60 wt% of second clay (calculated as the dry base weight) by using the dry base weight of the catalytic cracking aid as the reference. According to the present invention, the catalytic cracking aid can effectively improve propylene yield and propylene selectivity in the catalytic cracking.

Description

technical field [0001] The disclosure relates to a catalytic cracking additive for increasing propylene production and a preparation method thereof. Background technique [0002] Low-carbon olefins are important organic chemical raw materials. With the rapid growth of demand for their derivatives, the world's demand for low-carbon olefins is also increasing year by year. Fluid catalytic cracking is one of the important production processes for the production of low-carbon olefins. In order to increase the production of low-carbon olefins, the use of catalysts or additives containing zeolite with MFI structure is an effective technical approach. [0003] ZSM-5 molecular sieve is a three-dimensional mesoporous high-silicon molecular sieve successfully prepared by Mobil Company for the first time. Its unique pore structure makes it have excellent performance in shape selective cracking, isomerization and aromatization. The pores of ZSM-5 molecular sieve allow the entry of stra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C07C4/06C07C11/06C10G11/05
Inventor 任飞刘倩倩朱玉霞田辉平庄立罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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