ZSM-5 zeolite catalyst for preparing propylene (MTP) from methanol, preparation method and regeneration method thereof

A ZSM-5, methanol-to-propylene technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy fluctuation in yield, poor stability, poor regeneration, etc., to improve diffusion performance, improved stability, and high average conversion rate

Active Publication Date: 2012-11-14
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially for the MTP catalytic reaction, the higher the molar ratio of silicon to aluminum, the higher the selectivity of propylene in the reaction product, as described in the Chinese patent application CN101269340A, but the continuous reaction product yield is easy to fluctuate, the stability is poor, and the reproducibility is not good enough. good

Method used

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  • ZSM-5 zeolite catalyst for preparing propylene (MTP) from methanol, preparation method and regeneration method thereof
  • ZSM-5 zeolite catalyst for preparing propylene (MTP) from methanol, preparation method and regeneration method thereof
  • ZSM-5 zeolite catalyst for preparing propylene (MTP) from methanol, preparation method and regeneration method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0040] The preparation of embodiment 1-12 aluminum sol

[0041] The raw materials, proportions and conditions for preparing aluminum sol are shown in Table 1.

[0042] The commercial zeolite powder with a silicon-aluminum molar ratio of 300 was purchased from Shanghai Fuxu Molecular Sieve Co., Ltd.

[0043] Table 1 prepares raw materials, proportioning ratio and conditions of aluminum sol

[0044]

[0045] The specific preparation method is as follows: Taking Example 1 as an example, measure a certain volume of concentrated acetic acid, dilute it to a concentration of 10mol / L with deionized water, measure a certain volume of 10mol / L acetic acid solution, place it in a three-necked bottle, and weigh the corresponding The weight of aluminum foil is cut into small pieces with a size of 1 cm, put into a three-neck bottle, heated to 60°C in an oil bath, and kept under stirring for 12 hours.

[0046] The content of aluminum in the aluminum sol made (according to Al 2 o 3 co...

Embodiment 13-22

[0047] Example 13-22 Modified treatment of zeolite powder with aluminum sol

[0048] The conditions for heat treatment of zeolite powder with aluminum sol as modifier are shown in Table 2.

[0049] Table 2 Conditions for treating zeolite powder with aluminum sol modification

[0050]

[0051] 18

[0052] The specific modification treatment method is as follows: Taking Example 13 as an example, put 10 g of zeolite powder with a silicon-aluminum molar ratio of 300 into a three-necked bottle, add 100 mL of aluminum sol, heat the oil bath to 40 ° C, and keep it under stirring for 24 Hour.

Embodiment 23

[0053] The preparation of embodiment 23 catalyst

[0054] Pour out the mixed solution of the catalyst and aluminum sol prepared in Example 14, add the same volume of deionized water to dilute, filter and separate the catalyst powder, wash with water three times the weight of the catalyst, and dry in an oven at 90°C for 12 hour, placed in a muffle furnace at 550 ° C for 6 hours to obtain the prepared catalyst.

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Abstract

The invention relates to a ZSM-5 zeolite catalyst for preparing propylene from methanol (MTP), a preparation method and a regeneration method thereof. In the preparation method, commercially available ZSM-5 zeolite powder is utilized as a base material, wherein, the framework Si-Al mol ratio is more than 300, and the crystal size is 200-800nm; and aluminum sol is adopted for modification at a certain temperature so as to adjust the property of solid acid of ZSM-5 zeolite to adapt to MTP catalytic reaction. By means of the methods, the catalyst has the advantages of greatly improved stability,greatly improved single-pass life up to over 1000 hours, greatly improved renewability and excellent property on the premise of keeping high propylene selectivity of the ZSM-5 zeolite with high Si-Almol ratio, wherein, the catalyst can be regenerated for more than 7 times; and industrial crude methanol with mass concentration of 90% is utilized as a reacting raw material.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a ZSM-5 zeolite catalyst for producing propylene from methanol, a preparation method and a regeneration method thereof. Background technique [0002] Zeolite molecular sieve is a kind of inorganic aluminosilicate crystal. The skeleton contains regular and orderly arranged molecular-sized pores (pore size is 0.3-1.5nm). It has the functions of shape-selective catalysis, ion exchange and molecular sieving. It has been It is widely used in industrial processes such as catalysis, adsorption separation and ion exchange. [0003] A ZSM-5 zeolite (MFI type) molecular sieve is disclosed in U.S. Patent No. 3,702,886, which has a two-dimensional ten-membered ring channel (one is a ten-membered ring straight channel, and the aperture is 0.54nm×0.56nm; the other is a ten-membered ring Sinusoidal channel, 0.51nm × 0.54nm), is the most widely used catalytic material so far, and is widely ...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/90C07C11/06C07C1/20
CPCY02P20/52Y02P20/584
Inventor 汪靖龙英才程晓维郭娟李春启忻仕河陈爱平李德炳梅长松
Owner DATANG INT CHEM TECH RESINST
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