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Method for preparing propylene from methanol

A technology of methanol and propylene, applied in the field of propylene production, which can solve the problems of low propylene/ethylene ratio and less propylene

Active Publication Date: 2008-08-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that there is less propylene in the methanol conversion product in the prior art, and the propylene / ethylene ratio is low, and a new method for producing propylene from methanol is provided

Method used

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  • Method for preparing propylene from methanol
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Examples

Experimental program
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Embodiment 1

[0020] Adopt commercial HZSM-5 molecular sieve as raw powder, number I, SiO 2 / Al 2 o 3 The molar ratio is 100, and the weight fraction is 2% phosphorus (in P 2 o 5 After impregnation, it was placed at room temperature for 2 hours, then transferred to an oven for 2 hours at 120°C, and then transferred to a muffle furnace and roasted at 520°C for 4 hours to obtain catalyst A. After 40 mesh, it is used for the evaluation of methanol to propylene reaction, the reaction pressure is 0.1MPa, the temperature is 500°C, and the space velocity of methanol is 3 hours -1 , the water / methanol weight ratio is 3:1, and its reactivity is shown in Table-1.

Embodiment 2～10

[0022] Using the method of Example 1, phosphorus, magnesium, and lanthanum modified species were loaded on HZSM-5 molecular sieve I to obtain a series of catalysts with different loaded species or dosages, named catalysts B~J, and the compositions of each catalyst were listed in Table-2 , and then carry out the evaluation of methanol to propylene reaction according to the method of Example 1, and the reaction results are listed in Table-1.

Embodiment 12

[0024] Use commercial HZSM-5 molecular sieve as raw powder, number II, SiO 2 / Al 2 o 3 The molar ratio is 300, and the oxides of phosphorus, magnesium, and lanthanum are loaded by the equal impregnation method. The content is shown in Table-1, and the catalyst K is obtained, and then the methanol to propylene reaction is evaluated according to the method of Example 1, and the results are listed in the table. -1.

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Abstract

The invention relates to a method for preparing propylene from methanol, which mainly solves problems of the prior art, such as low weight ratio of propylene / ethylene and low propylene selectivity. The invention solves the problems by using the methanol / water mixing liquid as material, contacting the material with a catalyst under conditions of 400-550 DEG C, 0.1-1Mpa, 1-5 hour<-1> of methanol weight hourly space velocity and 0.2-5:1 of water / methanol weight ratio, reacting and generating an effluent containing propylene, wherein the catalyst contains following componets by weight percent: a) 0-10% P of P2O5; b) 0-10% Mg of MgO; c) 0-10% La of La2O3; d) and the rest ZSM-5 molecular sieve, wherein the dosage of a, b, and c can not be zero at the same time. Thereby, the invention is useful in industrial production of propylene from methanol.

Description

technical field [0001] The invention relates to a method for producing propylene from methanol. Background technique [0002] Low-carbon olefins represented by ethylene and propylene are the most basic raw materials in the chemical industry. With the development of the world economy, the demand for low-carbon olefins is also increasing year by year, while the demand for propylene is growing more rapidly. From 1996 to 2001, the growth rate of global propylene demand was 6.1% / year, higher than the 4.3% / year growth rate of ethylene, and from 2001 to 2006, the growth rate of propylene demand will still reach 5.0% / year, 4.2% / year higher than the growth rate of ethylene. At present, the main raw material for the production of propylene is still petroleum hydrocarbons, and according to predictions, the oil in the world will be exhausted within 40 years, so it is urgent to develop new alternative processes and technologies to achieve the reduction of oil dependence while ensuring t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/06B01J29/40
CPCY02P20/52
Inventor 杨为民夏建超宋庆英张斌滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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