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Molecular sieve catalyst for preparation of aromatic hydrocarbon through methanol conversion, and preparation method and application of catalyst

A methanol conversion and molecular sieve technology, which is applied to molecular sieve catalysts, including molecular sieve catalysts, carbon compound catalysts, etc., can solve the problem of low yield of xylene mixture, achieve optimized product distribution, high yield of aromatics and BTX, and improve economic operation horizontal effect

Inactive Publication Date: 2016-05-04
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the aromatics yield, BTX yield and selectivity of methanol conversion to aromatics method in the prior art have been improved, the yield of xylene mixture in the BTX product is still low

Method used

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  • Molecular sieve catalyst for preparation of aromatic hydrocarbon through methanol conversion, and preparation method and application of catalyst
  • Molecular sieve catalyst for preparation of aromatic hydrocarbon through methanol conversion, and preparation method and application of catalyst
  • Molecular sieve catalyst for preparation of aromatic hydrocarbon through methanol conversion, and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This example is used to illustrate the molecular sieve catalyst for methanol conversion to aromatics and its preparation method. Specifically, the preparation method of molecular sieve catalyst comprises the following steps:

[0057] (1) Modification of hydrogen ZSM-5 molecular sieve:

[0058] Weigh 5.0gZn(NO 3 ) 2 ·6H 2 O was dissolved in 20 mL of deionized water to make a solution, and then 20 g of hydrogen-type ZSM-5 molecular sieve (produced by Shanghai Zhuoyue Chemical Technology Co., Ltd.) with a silicon-aluminum ratio of 30 was added to the solution, and soaked at room temperature for 10 hours. The impregnated hydrogen ZSM-5 molecular sieve was dried at 120° C. and then calcined at 550° C. for 5 hours to obtain the hydrogen ZSM-5 molecular sieve loaded with Zn element.

[0059] (2) Modification of hydrogen mordenite:

[0060] Weigh 10.0g of a hydrogen-type mordenite (produced by Shanghai Fuxu Molecular Sieve Co., Ltd.) sample with a silicon-aluminum ratio of...

Embodiment 2-8

[0065] Referring to Example 1, molecular sieve catalysts with different components for methanol conversion to aromatics were prepared. The raw materials and some conditions for the preparation of the molecular sieve catalysts of Examples 2-8 are shown in Table 1. In addition, in the modification step of hydrogen-type mordenite, the gas introduced is H with a volume ratio of 30 / 70 2 O / N 2 Mixed gas, and NH is used accordingly 4 F. Ammonium phosphate and ammonium borate; and in the calcining step of the molecular sieve catalyst, after extruding, drying at 100° C., and calcining at 600° C. for 5 hours to obtain the target catalyst.

[0066]

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Abstract

The invention provides a molecular sieve catalyst for preparation of aromatic hydrocarbon through methanol conversion. The catalyst comprises: 30-70 parts by mass of a hydrogen-type ZSM-5 molecular sieve, 5-30 parts by mass of a hydro-thermal-treated hydrogen-type mordenite, and 10-30 parts by mass of an adhesive. The catalyst further comprises a metallic element loaded on the hydrogen-type ZSM-5 molecular sieve and a non-metallic element loaded on the hydro-thermal-treated hydrogen-type mordenite, wherein the metallic element is one or more selected from Zn, Ag, Cd, Ga, Co, Mo, Cr, La, and Ce, and is loaded at an amount being 0.5-10 parts by mass based on the mass of the metallic element, and the non-metallic element is one or more selected from P, F, and B, and is loaded at an amount being 0.1-5 parts by mass based on the mass of the non-metallic element. The invention further provides a preparation method of the catalyst and an application of the catalyst to preparation of aromatic hydrocarbon through methanol conversion. The catalyst can effectively optimize product distribution, and improves economic operation level of an MTA industrial device.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a molecular sieve catalyst used for converting methanol into aromatics, a preparation method and application of the catalyst. Background technique [0002] Aromatics mainly include benzene, toluene and xylene (generally referred to as "BTX"), which are important basic chemical raw materials. The traditional production of aromatics, except for a small part from the by-products of crude benzene and coal tar in the coking industry, about 90% depends on petrochemical processes such as catalytic reforming of petroleum and high-temperature cracking to ethylene. Due to the energy distribution status of "rich in coal, poor in oil, and low in gas" in my country, the technical research and development of methanol conversion to aromatics (MTA) has not only opened up a new technical route for coal conversion to aromatics, but also contributed to my country's excess methanol pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C07C1/20C07C15/04C07C15/06C07C15/08
CPCY02P20/52B01J29/80B01J29/18B01J29/405B01J2229/14B01J2229/18C07C1/20C07C2529/80C07C15/08C07C15/06C07C15/04
Inventor 李春启陈爱平李德炳陈元应冯巍梅长松
Owner DATANG INT CHEM TECH RESINST
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