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Method for producing light olefins from methanol

A technology for low-carbon olefins and methanol, which is applied to hydrocarbon cracking to produce hydrocarbons, hydrocarbon production from oxygen-containing organic compounds, chemical recovery, etc., can solve the problems of low yield of low-carbon olefins, etc.

Active Publication Date: 2015-12-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the low yield of low-carbon olefins existing in the prior art, and a new method for producing low-carbon olefins from methanol is provided

Method used

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  • Method for producing light olefins from methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] in such as figure 1On the shown reaction device, methanol with a purity of 99.5% (by weight) enters the first riser reaction zone, contacts with the regenerated catalyst comprising SAPO-34 molecular sieve and the unborn catalyst, and the generated gas phase stream and catalyst enter the first fast bed The reaction zone is contacted with the second raw material of 75% (weight) of C4 olefins, 20% (weight) of C5 olefins, and 5% (weight) of steam, and the regenerated catalyst, and the gas phase stream and catalyst generated enter the second lifting Tube reaction zone, the gaseous phase stream and catalyst that generate enter the second fast bed reaction zone, and C4 olefin is 30% (weight), methanol is 47% (weight), dimethyl ether is 18% (weight), water vapor is 5 The third raw material of % (weight) contacts with regenerated catalyst, and the gaseous phase flow and catalyzer of the second rapid bed reaction zone enter gas-solid rapid separation equipment, and gaseous phase ...

Embodiment 2

[0022] According to the conditions and steps described in Example 1, the methanol with a purity of 99.5% (by weight) enters the first riser reaction zone, contacts with the regenerated catalyst comprising SAPO-34 molecular sieve and the unborn catalyst, and the gas phase stream and catalyst that are generated enter The first fast bed reaction zone is contacted with the second raw material of 88% by weight of C4 olefins, 12% by weight of C5 olefins, and 10% by weight of water vapor and the regenerated catalyst, and the gas phase stream and catalyst generated Enter the second riser reaction zone, the gaseous phase flow and catalyst that generate enter the second fast bed reaction zone, and C4 olefin is 50% (weight), methyl alcohol is 20% (weight), dimethyl ether is 18% (weight), The water vapor is 12% (weight) of the third raw material and the regenerated catalyst contact, the gas phase flow and the catalyst in the second fast bed reaction zone enter the gas-solid rapid separatio...

Embodiment 3

[0024] According to the conditions and steps described in Example 2, the raw catalyst is divided into two parts. In terms of mass fraction, 50% returns to the first riser reaction zone, and 50% enters the regenerator for regeneration to form a regenerated catalyst. The regenerated catalyst is divided into three parts. Part, in terms of mass fraction, 40% returns to the first riser bed reaction zone, 30% returns to the first fast bed reaction zone, and 30% returns to the second fast bed reaction zone. The reaction conditions in the first riser reaction zone are: the reaction temperature is 470°C, the reaction pressure is 0.01MPa in gauge pressure, and the gas phase velocity is 7 m / s; the reaction conditions in the first fast bed reaction zone are: the reaction temperature is 550°C , the reaction pressure is 0.01MPa in gauge pressure, and the gas phase velocity is 1.5 m / s; the reaction conditions in the second riser reaction zone are: the reaction temperature is 575°C, the reacti...

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Abstract

The invention relates to a method for preparing low-carbon olefine from methanol, which mainly solves the problem of low low-carbon olefine yield in the prior art. The technical scheme of the method for preparing low-carbon olefine from methanol comprises the following steps: (a) feeding methanol into a first lift pipe reaction zone, feeding into a first rapid bed reaction zone together with a catalyst, being in contact with a second strand of raw material, feeding into a second lift pipe reaction zone, feeding into a second rapid bed reaction zone, being in contact with a third strand of raw material and a regenerated catalyst, and feeding into gas-solid rapid separation equipment, thus forming a to-be-generated catalyst; (b) returning one part of the to-be-generated catalyst to the first lift pipe reaction zone, and feeding one part into a regenerator for regeneration, thus forming the regenerated catalyst; and (c) returning one part of the regenerated catalyst to the first lift pipe reaction zone, returning one part to the first rapid bed reaction zone, and returning one part to the second rapid bed reaction zone. Thus, the problem is well solved; and the method can be used for industrial production of low-carbon olefine.

Description

technical field [0001] The invention relates to a method for producing light olefins from methanol. Background technique [0002] Low-carbon olefins, namely ethylene and propylene, are two important basic chemical raw materials, and their demand is increasing. Generally, ethylene and propylene are produced through petroleum routes, but due to the limited supply and high price of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase. In recent years, people have begun to vigorously develop the technology of converting alternative raw materials into ethylene and propylene. Among them, an important class of alternative raw materials for the production of low-carbon olefins is oxygenated compounds, such as alcohols (methanol, ethanol), ethers (dimethyl ether, methyl ethyl ether), esters (dimethyl carbonate, methyl formate Esters), etc., these oxygenated compounds can be converted from coal, natural gas, biomass and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C4/06C07C11/02
CPCY02P20/584
Inventor 齐国祯钟思青王莉王菊
Owner CHINA PETROLEUM & CHEM CORP