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Modified Y type molecular sieve

A molecular sieve and modification technology, applied in the direction of crystalline aluminosilicate zeolite, fauhhedral crystalline aluminosilicate zeolite, etc., can solve the problems of reduced conversion activity and deterioration of product distribution, so as to reduce toxic effects and improve activity stability. , The effect of excellent alkali nitrogen resistance

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above method can be used to prepare rare earth-containing Y-type molecular sieves suitable for use as active components of catalytic cracking catalysts, it is obvious that the rare-earth Y-type molecular sieves prepared by these methods are used as active components of cracking agents. When coking wax oil raw materials, it still faces the problems of reduced conversion activity and poor product distribution

Method used

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  • Modified Y type molecular sieve
  • Modified Y type molecular sieve
  • Modified Y type molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 5.0 kilograms of NaY molecular sieves on a dry basis (Changling Catalyst Factory provides, crystallinity 86%, skeleton silicon-aluminum ratio 5.2) and 4 kilograms of deionized water in the reactor, slowly add 2.50 liters of rare earth chloride solution (Qilu Provided by Catalyst Plant, RE 2 o 3 Content 222.5 g / L), use 4% dilute hydrochloric acid to adjust the pH of the system to 3.5, raise the temperature to 90°C and stir for 1.5 hours, filter, wash, and dry; then roast at 550°C for 2 hours to obtain "Jiaojiao" Rare earth sodium, recorded as modified molecular sieve ABY-1A.

[0028] Take 2.0 kg of modified molecular sieve ABY-1A dry basis and put it into the reactor, add 1.6 kg of deionized water, slowly add 0.48 liter of rare earth chloride, 80 g of Fe(NO 3 ) 3 9H 2 O solid, 100 grams of ammonium chloride, adjust the pH of the system to 3.5 with 4% dilute hydrochloric acid, heat up to 90°C and stir for 1 hour, filter, wash, and dry to obtain the modified Y mole...

Embodiment 2

[0038] Add 5.0 kilograms of NaY molecular sieves on a dry basis (Changling Catalyst Factory provides, crystallinity 86%, skeleton silicon-aluminum ratio 5.2) and 4 kilograms of deionized water in the reactor, slowly add 4.20 liters of rare earth chloride solution (Qilu Provided by Catalyst Plant, RE 2 o 3 Content 222.5 g / L), use 4% dilute hydrochloric acid to adjust the pH of the system to 3.5, raise the temperature to 90°C and stir for 1.5 hours, filter, wash, and dry; then roast at 550°C for 2 hours to obtain "Jiaojiao" Rare earth sodium Y is recorded as modified molecular sieve ABY-2A.

[0039] Take 2.0 kg of modified molecular sieve ABY-2A dry basis and put it into the reactor, add 1.6 kg of deionized water, slowly add 0.48 liter of rare earth chloride, 125 g of Fe(NO 3 ) 3 9H 2 O solid, 100 grams of ammonium chloride, adjust the pH of the system to 3.5 with 4% dilute hydrochloric acid, heat up to 90°C and stir for 1 hour, filter, wash, and dry to obtain the modified Y...

Embodiment 3

[0049] Add 5.0 kilograms of NaY molecular sieves on a dry basis (Changling Catalyst Factory provides, crystallinity 86%, skeleton silicon-aluminum ratio 5.2) and 4 kilograms of deionized water in the reactor, slowly add 5.12 liters of rare earth chloride solution (Qilu Provided by Catalyst Plant, RE 2 o 3 content of 222.5 g / L), use 4% dilute hydrochloric acid to adjust the pH of the system to 3.5, heat up to 90°C and stir for 1.5 hours, filter, wash, and dry; then roast at 650°C and 100% steam atmosphere for 2 hours to obtain The "one-to-one-baked" rare earth sodium Y is recorded as modified molecular sieve ABY-3A.

[0050] Take 2.0 kg of modified molecular sieve ABY-3A dry basis and put it into the reactor, add 1.6 kg of deionized water, slowly add 1.44 liters of rare earth chloride, 210 grams of Fe(NO 3 ) 3 9H 2 O solid, use 4% dilute hydrochloric acid to adjust the pH of the system to 3.5, raise the temperature to 90°C and stir for 1 hour, filter, wash, and dry to obtai...

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Abstract

The present invention discloses a modified Y type molecular sieve, which is characterized in that the molecular sieve is modified by using rare earth, iron, copper and phosphorus, wherein rare earth content in the molecular sieve is 8-23 wt% (calculated as rare earth oxide), iron content in the molecular sieve is 0.1-3.0 wt% (calculated as Fe2O3), copper content in the molecular sieve is 0-3.0 wt% (calculated as CuO), phosphorus content in the molecular sieve is 0-2.0 wt% (calculated as P2O5), and sodium oxide content in the molecular sieve is 0.1-2.5 wt%. According to the modified Y type molecular sieve, a molecular sieve acid amount measured by <31>P MAS NMR after absorbing tri-n-butylphosphine oxide is 1.400-4.500 mmol.g<-1>, and a molecular sieve acid amount measured by <31>P MAS NMR after absorbing trimethyl phosphine oxide (TMPO) is 2.300-6.600 mmol.g<-1>. The molecular sieve has a high acid amount, especially a high outer surface acid amount, and can be adopted as an active component to effectively resist harm effects on the molecular sieve acid center by the basic nitrogen macromolecules so as to provide an excellent anti-basic nitrogen performance.

Description

technical field [0001] The present invention relates to a Y-type molecular sieve, more specifically the invention relates to a Y-type molecular sieve modified by rare earth elements and metal elements and / or non-metal elements. Background technique [0002] Fluid Catalytic Cracking (FCC) plays a fundamental and core role in the modern oil refining industry. Y-type molecular sieves (HY, REY, USY) have been the main active components of catalytic cracking (FCC) catalysts since they were first used in the 1960s. As catalytic cracking (FCC) raw materials become increasingly heavy and inferior, blending low-quality raw materials such as coker gas oil (CGO) has become an important way for refineries to expand the source of FCC raw materials and tap the potential to increase efficiency. Compared with straight-run gas oil (VGO), coker gas oil is an inferior catalytic feedstock with higher nitrogen content, aromatic hydrocarbon content and colloid content, and lower saturated hydroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
Inventor 王维家庄立闫荣国罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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