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Nanometer agglomerated sheet-shaped mordenite catalyst

A mordenite and catalyst technology, which is applied in the field of nano-aggregated sheet-shaped mordenite catalysts and can solve the problems of poor diffusion performance of molecular sieve catalysts and the like

Active Publication Date: 2018-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is to provide a novel nano-aggregated sheet-shaped mordenite catalyst in order to overcome the problem of poor diffusion performance of molecular sieve catalysts in the prior art. It has excellent reaction performance in the conversion of aromatics such as chemical, and can adapt to the reaction conditions of high space velocity
[0006] The second technical problem to be solved by the present invention is to provide a corresponding preparation method for the catalyst material used to solve the first problem, and to solve the matching problem of the catalytic effect of the molecular sieve and the synthesis parameters in the catalyst preparation process

Method used

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Effect test

Embodiment 1

[0033] The nano-aggregated sheet-shaped mordenite (silicon-aluminum ratio is 25, FE-SEM as figure 1 , denoted as Z1), the Na in the sample 2 O content is less than 0.1wt%, takes by weighing 98.7 grams of the above-mentioned dry powder of hydrogen type, adds the chloroplatinic acid that molar ratio is 2:1:1, tetraammine platinum dichloride and tetraammine platinum nitrate with the mode of equal volume impregnation, and In the mixed solvent of ethanolamine, sodium polyacrylate (NaPA:Mw≈2100) and EDTA whose molar ratio is 1:1:2, the mass fraction of platinum compared to molecular sieve is 0.3%wt, and the molar ratio of noble metal to solvent is 1:20, impregnating the dry sample with 38 grams of silica sol, and a certain amount of dilute nitric acid, safflower powder, kneading evenly, extrusion molding, the matrix is ​​roasted at 580°C in air atmosphere for 3 hours, the heating rate is 2° / min, and pelletized Catalyst A1 is obtained.

Embodiment 2

[0035] The nano-aggregated sheet-shaped mordenite (silicon-aluminum ratio is 19, FE-SEM as figure 2 , denoted as Z2), the Na in the sample 2 O content is less than 0.1wt%, weigh 100 grams of the above-mentioned dry powder of hydrogen type, add chloroplatinic acid and tetraammineplatinum nitrate-ethanol solution in the form of equal volume impregnation, so that the mass fraction of platinum compared to molecular sieve is 0.05%wt , the molar ratio of the noble metal to the solvent is 1:15, the impregnated dry sample is kneaded with 49 grams of aluminum dihydrogen phosphate, and molded. The matrix is ​​calcined at 550° C. for 4 hours in an air atmosphere, and the heating rate is 1.5° / min. Catalyst A2 is obtained by pelletizing.

Embodiment 3

[0037] The nano-aggregated sheet-shaped mordenite (Z1), Na in the sample 2 O content is less than 0.1wt%, weighs 106 grams of hydrogen-type above-mentioned dry powders, adds tetraammine platinum oxalate in the mode of impregnation of equal volume, mixes in the ethanol and diethyl sulfide solution of molar ratio 5:1, makes platinum be compared with molecular sieve The mass fraction is 0.2%wt, the molar ratio of noble metal to solvent is 1:30, the impregnated dry sample is kneaded and formed with 37 grams of pseudo-boehmite, and the matrix is ​​roasted at 500°C in air atmosphere for 3.5 hours, and the heating rate is 2.5° / min, pelletized to obtain catalyst A3.

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Abstract

The invention relates to a nanometer agglomerated sheet-shaped mordenite catalyst and a preparation method thereof. A purpose of the present invention is mainly to overcome the problems of slow diffusion speed and unsmooth diffusion channel in the actual application of conventional spheres and other blocky agglomerated nanometer materials. According to the technical scheme, the catalyst comprises,by weight, A) 5-95% of a nanometer aggregated sheet-shaped mordenite material; B) 0.001-3% of a transition metal; and C) 2-80% of a binder. With the technical scheme, the problems in the prior art are well solved. According to the present invention, the cost of the technology can be controlled, the excellent reaction performance can be provided in the high space velocity aromatic hydrocarbon conversion reaction, the occurrence of aromatic hydrocarbon polymerization, cracking and other side reactions can be effectively inhibited, and the catalyst can be used in the industrial production of aromatic hydrocarbon conversion.

Description

technical field [0001] The invention relates to a nano-aggregated sheet-shaped mordenite catalyst. Background technique [0002] With the continuous development of the polyester industry, it is of great significance to develop the conversion technology between aromatics and regulate the production of main aromatics products such as benzene (B), toluene (T) and xylene (X). Molecular sieve is a catalytic material widely used in the catalytic process of petrochemical industry, among which mordenite, as the bulk material of the catalyst, is an important active component in the traditional conversion reaction of aromatic hydrocarbons (Catal Today, 2004, 97:297-302). As one of the earliest zeolites recognized by humans, mordenite is a crystalline aluminosilicate with special acid distribution and regular mass transfer channels. And other petrochemical fields have important industrial application value. Reducing the size of molecular sieves to the nanometer scale is an effective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/22
CPCB01J29/22B01J37/0018B01J2229/186B01J35/50B01J35/615B01J35/617
Inventor 孔德金童伟益李经球李华英祁晓岚
Owner CHINA PETROLEUM & CHEM CORP
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