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Modified Y type molecular sieve

A molecular sieve and modification technology, applied in the direction of octahedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of product distribution deterioration, conversion activity reduction, etc., to reduce toxicity and improve activity stability , Significant effect of alkali nitrogen resistance

Active Publication Date: 2015-05-20
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 sieve (provided by Changling Catalyst Factory, crystallinity 86%, framework silicon-aluminum ratio 5.2) and 4 kilograms of deionized water into the reactor, and slowly add 2.50 liters of rare earth chloride solution (Qilu) under vigorous stirring. Provided by catalyst factory, RE 2 O 3 The content is 222.5 g / l), adjust the pH of the system with 4% dilute hydrochloric acid to 3.5, heat up to 90°C and stir for 1.5 hours, filter, wash, and dry; then calcinate at 550°C for 2 hours to produce "one-pass one-baking" Rare earth sodium is 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 liters of rare earth chloride, 80 grams of Fe(NO 3 ) 3 ·9H 2 O solid, 100 grams of ammonium chloride, adjust the system pH=3.5 with 4% dilute hydrochloric acid, heat up to 90°C and stir for 1 hour, filter, wash, and dry to obtain ...

Embodiment 2

[0038] Add 5.0 kilograms of NaY molecular sieve (provided by Changling Catalyst Factory, crystallinity 86%, framework silicon-to-aluminum ratio 5.2) and 4 kilograms of deionized water into the reactor, and slowly add 4.20 liters of rare earth chloride solution (Qilu) under vigorous stirring. Provided by catalyst factory, RE 2 O 3 The content is 222.5 g / l), adjust the pH of the system with 4% dilute hydrochloric acid to 3.5, heat up to 90°C and stir for 1.5 hours, filter, wash, and dry; then calcinate at 550°C for 2 hours to produce "one-pass one-baking" 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 liters of rare earth chloride, 125 g of Fe(NO 3 ) 3 ·9H 2 O solid, 100 grams of ammonium chloride, adjust the system pH=3.5 with 4% dilute hydrochloric acid, heat up to 90°C and stir for 1 hour, filter, wash, and dry to obtai...

Embodiment 3

[0049] Add 5.0 kilograms of NaY molecular sieve (provided by Changling Catalyst Factory, crystallinity 86%, framework silicon-aluminum ratio 5.2) and 4 kilograms of deionized water into the reactor, and slowly add 5.12 liters of rare earth chloride solution (Qilu) under vigorous stirring. Provided by catalyst factory, RE 2 O 3 The content is 222.5g / L), adjust the system pH=3.5 with 4% dilute hydrochloric acid, heat to 90℃ and stir for 1.5 hours, filter, wash, and dry; then calcinate at 650℃ and 100% steam atmosphere for 2 hours to prepare "One cross one baking" rare earth sodium Y is recorded as modified molecular sieve ABY-3A.

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

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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, and more specifically, the present invention relates to a Y-type molecular sieve modified with rare earth elements, metal elements and / or non-metal elements. Background technique [0002] Fluidized catalytic cracking technology (FCC) is at the foundation and core position in the modern oil refining industry. Y-type molecular sieves (HY, REY, USY) have been the main active component of catalytic cracking (FCC) catalysts since they were first used in the 1960s. With the increasingly heavy and inferior quality of catalytic cracking (FCC) raw materials, blending of inferior raw materials such as coking wax oil (CGO) has become an important way for refiners to expand the source of FCC raw materials and tap the potential to increase efficiency. Compared with straight-run wax oil (VGO), coker wax oil is a low-quality catalytic feedstock with higher nitrogen content, aromatic content and gum content, and l...

Claims

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Application Information

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Patent Type & Authority Patents(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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