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ZSM-5/rectorite composite catalytic material and preparation method thereof

A technology of ZSM-5 and composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as different process conditions, achieve reduced preparation costs, good hydrothermal stability, and improved The effect of utilization efficiency

Active Publication Date: 2010-06-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] At present, various technologies for preparing ZSM-5 molecular sieve composite materials by in-situ synthesis using natural clay as raw materials mainly use natural clays such as kaolin, diatomite, montmorillonite, and bentonite, and have not yet involved natural rectorite. Moreover, using different raw materials to synthesize the same molecular sieve requires different process conditions.

Method used

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  • ZSM-5/rectorite composite catalytic material and preparation method thereof
  • ZSM-5/rectorite composite catalytic material and preparation method thereof
  • ZSM-5/rectorite composite catalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add water and binder (silica sol) to the commercially available rectorite to extrude into strips, dry the strips and crush them into rectorite particles with a particle size of 80-110 μm, roast at 1000°C for 1 hour, and set aside.

[0044] Water glass (containing SiO 2 26wt%, Na 2 O 8wt%) 16g, TPABr 1.6g, distilled water 114g, concentration is the sulfuric acid aqueous solution 5g of 3M, and the rectorite particle 6g after the above-mentioned roasting process mixes, and stirs about 1h (this moment, reactant gel pH value is about 8 ). Each component in the gel is calculated as (Na 2 O+K 2 O) / SiO 2 =0.3, TPABr / SiO 2 =0.09,H 2 O / SiO 2 =100.

[0045] The mixed gel was poured into a stainless steel crystallization kettle lined with polytetrafluoroethylene, heated to 170°C for static crystallization for 72 hours. After the crystallization is completed, cool and filter to remove the mother liquor, wash, dry, and roast at 550° C. to remove the template agent to obtain...

Embodiment 2

[0047] Add water and binder (silica sol) to the commercially available rectorite to extrude into strips, dry the strips and crush them into rectorite particles with a particle size of 50-100 μm, roast at 1050°C for 1 hour, and set aside.

[0048] Water glass (containing SiO 2 26wt%, Na 2 O 8wt%) 20g, TPABr 1.6g, distilled water 112g, concentration is that the sulfuric acid aqueous solution 3g of 3M and the rectorite particle 6g after roasting process mix, and stir about 1h (at this moment, reactant gel pH value is about 9), Each component in the gel is calculated as (Na 2 O+K 2 O) / SiO 2 =0.3, TPABr / SiO 2 =0.07,H 2 O / SiO 2 =80.

[0049] The mixed gel was poured into a stainless steel crystallization kettle lined with polytetrafluoroethylene, heated to 170°C for static crystallization for 48 hours. After the crystallization is completed, cool and filter to remove the mother liquor, wash, dry, and roast at 550° C. to remove the template agent to obtain a crystallized prod...

Embodiment 3

[0051] Add water and binder (water glass) to the commercially available rectorite to extrude into strips, dry the strips and crush them into rectorite particles with a particle size of 80-130 μm, roast at 1100°C for 1 hour, and set aside.

[0052] Water glass (containing SiO 2 26wt%, Na 2 O 8wt%) 8g, TPABr 0.55g, distilled water 69g, concentration is that the rectorite particle 6g after the sulfuric acid aqueous solution 3g of 3M and roasting process mixes, and stirs 1h (at this moment, reactant gel pH value is about 10), coagulation Each component in the glue is calculated as (Na 2 O+K 2 O) / SiO 2 =0.3, TPABr / SiO 2 =0.06,H 2 O / SiO 2 =120.

[0053] The mixed gel was poured into a stainless steel crystallization kettle lined with polytetrafluoroethylene, heated to 155°C for static crystallization for 72 hours. After the crystallization is completed, cool and filter to remove the mother liquor, wash, dry, and roast at 550° C. to remove the template agent to obtain a crys...

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Abstract

The invention provides a ZSM-5 / rectorite composite catalytic material and a preparation method thereof. The composite material is a crystal product formed by in-situ crystallization and by using a natural rectorite mineral to provide an aluminum source and part of silicon source for synthesizing molecular sieves and using the natural rectorite mineral as a matrix for growing the molecular sieves. In the composite material, the content of the ZSM-5 molecular sieves is no less than 10 mass percent, and the silicon to aluminum ratio of the ZSM-5 molecular sieves is 20 to 60. The ZSM-5 / rectorite composite catalytic material provided by the invention has excellent hydrothermal stability. The material expands the range of the raw materials used for preparing molecular sieve materials by an in-situ synthesis method as well as the application range of the natural rectorite mineral.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a ZSM-5 / natural clay composite catalytic material and its preparation technology, wherein the natural clay is a natural rectorite mineral, which provides all the aluminum sources and parts required for the synthesis of ZSM-5 molecular sieves Silicon source, and as a matrix or carrier for composite materials. Background technique [0002] In situ crystallization (also known as in situ synthesis) technology is the chemically reactive SiO in natural minerals 2 and Al 2 o 3 As a part of the silicon source and aluminum source of the synthetic molecular sieve, it can be combined with the external silicon source and aluminum source under alkaline conditions to realize the synthesis process of the molecular sieve on the outer surface and inner surface of the channel of the natural mineral, and finally obtain a double channel distribution. Composite catalytic materials. Among them,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J21/16
Inventor 刘海燕鲍晓军曹丽媛范煜石冈
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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