Modified Y-type molecular sieve and a preparation method thereof

A molecular sieve and modification technology, applied in molecular sieve catalysts, chemical instruments and methods, and hydrocarbon oil treatment, can solve the problems of destroying zeolite structure, low conversion rate of heavy oil, and reducing zeolite selectivity, etc., and achieve high conversion efficiency, heat and The effect of high hydrothermal stability and low coke selectivity

Active Publication Date: 2020-02-28
CHINA PETROLEUM & CHEM CORP +1
View PDF20 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the preparation of rare earth high-silicon Y-type zeolite by hydrothermal method has its disadvantages: too harsh hydrothermal treatment conditions will destroy the structure of zeolite, making it impossible to obtain Y-type zeolite with higher silicon-aluminum ratio; Zeolite stability and formation of new acid sites are beneficial, but exce

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified Y-type molecular sieve and a preparation method thereof
  • Modified Y-type molecular sieve and a preparation method thereof
  • Modified Y-type molecular sieve and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0052] An embodiment of the present invention further provides a method for preparing the above-mentioned modified Y-type molecular sieve, which includes the following steps:

[0053] (1) Perform ion exchange reaction between NaY molecular sieve and rare earth salt solution to obtain a Y-type molecular sieve with no change in the size of the rare earth-containing unit cell with reduced sodium oxide content;

[0054] (2) Roasting the ion-exchanged Y-type molecular sieve containing the rare earth-containing unit cell with no change in size to obtain a Y-type molecular sieve with a reduced unit cell constant;

[0055] (3) Perform phosphorus modification treatment on the Y-type molecular sieve with a reduced unit cell constant after calcination to introduce phosphorus into the molecular sieve;

[0056] (4) Reacting the phosphorus-modified molecular sieve with silicon tetrachloride for dealumination and silicon supplementation to obtain a gas-phase ultra-stable modified Y-type molecular sie...

Example Embodiment

[0105] Example 1

[0106] Take 2000 grams of NaY molecular sieve (calculated on a dry basis) and add it to 20 liters of de-cationized aqueous solution and stir to make it evenly mixed. Add 600 ml of RE (NO 3 ) 3 Solution (the concentration of rare earth salt solution is based on RE 2 O 3 Counted as 319g / L, RE is a mixed rare earth of La and Ce, based on the mass of rare earth oxide La 2 O 3 :Ce 2 O 3 =3:2), stirring, heating to 90~95℃ for 1 hour, then filtering and washing, and drying the filter cake at 120℃ to obtain a unit cell constant of 2.471nm, sodium oxide content of 7.0wt%, and RE 2 O 3 Y-type molecular sieve with 8.8wt% rare earth content.

[0107] Afterwards, the molecular sieve was calcined at a temperature of 390° C., in an atmosphere containing 50 vol% water vapor and 50 vol% air for 6 hours to obtain a Y-type molecular sieve with a unit cell constant of 2.455 nm.

[0108] After cooling, the Y-type molecular sieve with a unit cell constant of 2.455 nm was added to 6 liter...

Example Embodiment

[0113] Example 2

[0114] Take 2000 grams of NaY molecular sieve (calculated on a dry basis) and add it to 25 liters of de-cationized aqueous solution and stir to mix evenly, then add 800 ml of RECl 3 Solution (in RE 2 O 3 The calculated solution concentration is: 319g / L, RE is a mixed rare earth of La and Ce, and La is calculated by the mass of rare earth oxide 2 O 3 :Ce 2 O 3 =3:2), stirring, heating to 90~95℃ for 1 hour, then filtering and washing, and drying the filter cake at 120℃ to obtain a unit cell constant of 2.471nm, sodium oxide content of 5.5wt%, and RE 2 O 3 Y-type molecular sieve with a rare earth content of 11.3wt%.

[0115] Afterwards, the molecular sieve was calcined at a temperature of 450° C. and 80% steam for 5.5 hours to obtain a Y-type molecular sieve with a unit cell constant of 2.461 nm.

[0116] After cooling, the Y-type molecular sieve with a unit cell constant of 2.461 nm was added to 6 liters of aqueous solution with 268 g of ammonium phosphate dissolved, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Cell constantaaaaaaaaaa
Cell constantaaaaaaaaaa
Cell constantaaaaaaaaaa
Login to view more

Abstract

One embodiment of the invention provides a modified Y-type molecular sieve and a preparation method thereof, wherein the modified Y-type molecular sieve comprises 4-11 wt% of rare earth (calculated asrare earth oxide), not more than 0.7 wt% of sodium (calculated as sodium oxide), 0.5-5 wt% of zinc (calculated as zinc oxide), and 0.05-10 wt% of phosphorus (calculated as phosphorus pentoxide), theskeleton silicon-alumina ratio is 7-14 based on SiO2/Al2O3 molar ratio, the mass of the non-skeleton aluminum accounts for not more than 20% of the total aluminum mass, and the pore volume of secondary pores with a pore size of 2-100 nm accounts for 15-30% of the total pore volume. According to the invention, the modified Y-type molecular sieve contains phosphorus, rare earth and zinc modificationcomponents, has advantages of high crystallinity, high thermal stability, high hydrothermal stability and rich secondary pores, is used for catalytic cracking of hydrogenated LCO (light cycle oil), and has advantages of low coke selectivity and high conversion efficiency of reactants.

Description

technical field [0001] The invention relates to a Y-type molecular sieve, in particular to a modified Y-type molecular sieve which can be used for processing hydrogenated LCO catalytic cracking and a preparation method thereof. Background technique [0002] Y-type molecular sieves (also known as Y-type zeolites) have been the main active component of catalytic cracking (FCC) catalysts since they were first used in the 1960s. At present, the industrial production of high-silicon Y-type zeolite mainly adopts the hydrothermal method, and the NaY zeolite is subjected to multiple rare earth ion exchange and high-temperature roasting, and high-silicon Y-type zeolite containing rare earths can be prepared, which is also the preparation of high-silicon Y-type zeolite. Type zeolite is the most conventional method. [0003] However, the preparation of rare earth high-silicon Y-type zeolite by hydrothermal method has its disadvantages: too harsh hydrothermal treatment conditions will ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J29/08B01J35/10C01B39/24C10G11/05
CPCB01J29/088B01J35/10B01J35/1061B01J35/1066C01B39/24C10G11/05C10G2300/70
Inventor 沙昊周灵萍袁帅姜秋桥许明德张蔚琳陈振宇田辉平
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap