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Catalyst for methanol conversion to propylene and preparation method thereof

A methanol conversion and catalyst technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low propylene selectivity, improve propylene selectivity, improve particle dispersion and concentration, and improve selectivity. sexual effect

Inactive Publication Date: 2019-06-28
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the purpose of the present invention is to provide a new catalyst for the conversion of methanol to propylene and a preparation method thereof for the technical problem of low propylene selectivity in the existing MTP technology

Method used

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  • Catalyst for methanol conversion to propylene and preparation method thereof
  • Catalyst for methanol conversion to propylene and preparation method thereof
  • Catalyst for methanol conversion to propylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This example is used to illustrate the methanol conversion to propylene catalyst and its preparation method.

[0042] Weigh 25g of large-grained H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 80 and an average grain size of 5 μm, and place it in a planetary ball mill with a frequency of 35 Hz for ball milling for 10 hours to obtain a ball-milled molecular sieve, and then ball mill The final molecular sieve is put into the reaction kettle; wherein, the ball grinding material used in the planetary ball mill includes small balls with a diameter of 10mm and 5mm, and its mass ratio is 1:3, and the total volume of the ball grinding material accounts for 10% of the volume of the planetary ball mill ball mill tank. 3 / 5.

[0043] Account for 6% by weight of the molecular sieve according to the total weight of the modifier and the amount ratio of the Mn element in the first modifier and the Ag element in the second modifier is 1:1 and weighs Mn (NO 3 ) 2 ·6H 2 O and ...

Embodiment 2

[0047] This example is used to illustrate the methanol conversion to propylene catalyst and its preparation method.

[0048] Weigh 25g of large-grained H-ZSM-5 molecular sieve with an average grain size of 1.5 μm and a silicon-aluminum ratio of 230, and place it in a planetary ball mill with a frequency of 15 Hz for ball milling for 8 hours to obtain a ball-milled molecular sieve, and then The molecular sieve after ball milling is put into the reaction kettle; among them, the ball abrasive used in the planetary ball mill includes small balls with a diameter of 10mm and 5mm, and the mass ratio is 1:1. 1 / 5 of.

[0049] Accounting for 4% by weight of the molecular sieve according to the total weight of the modifier and the amount ratio of the Mn element in the first modifier and the Ag element in the second modifier is 1:0.5 and weighs Mn (NO 3 ) 2 ·6H 2 O and AgNO 3 , add 150ml of deionized water to dissolve, and stir at room temperature for 0.5h to obtain a modifier solutio...

Embodiment 3

[0053] This example is used to illustrate the methanol conversion to propylene catalyst and its preparation method.

[0054] Weigh 25g of large-grained H-ZSM-5 molecular sieve with a silicon-aluminum ratio of 300 and an average grain size of 3 μm, and place it in a planetary ball mill with a frequency of 20 Hz for ball milling for 6 hours to obtain a ball-milled molecular sieve, and then ball mill The final molecular sieve is put into the reaction kettle; wherein, the ball grinding material used in the planetary ball mill includes small balls with a diameter of 10mm and 5mm, and its mass ratio is 1:1, and the total volume of the ball grinding material accounts for 10% of the volume of the planetary ball mill ball mill tank. 2 / 5.

[0055] Ga 2 (SO 4 ) 3 16H 2 O and Ce(NO 3 ) 3 ·6H 2 O, add 150ml of deionized water to dissolve, and stir at room temperature for 0.5h to obtain a modifier solution.

[0056] Slowly add the above modifier solution into the reaction kettle equ...

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Abstract

The invention provides a catalyst for MTP (methanol-to-propylene) through conversion and a preparation method of the catalyst. The preparation method comprises the following steps: (1) an H-ZSM-5 molecular sieve is added to a ball mill for ball milling, and an H-ZSM-5 molecular sieve subjected to ball milling is obtained; (2) a modifier water solution containing a first modifier and a second modifier is prepared, wherein the first modifier is one or more of nitrates or sulfates of Cr, Fe, Ca, Mn, Ir, Cu, Mo, Mg and Ru, the second modifier is one or more of nitrates or sulfates of Sr, W, La, Ce, Cs, Ag, Ga, V and Co, and the substance amount ratio of the first modifier to the second modifier is 1:(0.1-1); (3) the modifier water solution is added to the H-ZSM-5 molecular sieve subjected to ball milling, the mixture is stirred at 25-40 DEG C for 0.5-5 h and subjected to a reaction at 50-90 DEG C for 8-48 h; (4) a target product is prepared from a reaction product by filtering, washing, drying, grinding and roasting. The catalyst has high propylene selectivity and P / E ratio.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for converting methanol into propylene and a preparation method thereof. Background technique [0002] Propylene is an important petrochemical basic raw material next to ethylene, mainly used in the production of basic organic chemicals such as polypropylene, acrylonitrile, propylene oxide, phenol, acetone, cumene, butanol, octanol, acrylic acid and isopropanol product. At present, propylene mainly comes from steam cracking and catalytic cracking (FCC) processes, which are heavily dependent on petroleum resources. With the increasing depletion of petroleum resources, non-petroleum route to propylene technology has received extensive attention. At present, using coal and natural gas as raw materials to produce propylene (MTP) through methanol is one of the most promising routes to replace petroleum to obtain propylene. [0003] In the MTP process, a cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/48
CPCB01J29/405B01J29/48
Inventor 李春启冯巍李德炳陈爱平陈元应王旭金黄艳辉梅长松
Owner DATANG INT CHEM TECH RESINST