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Method for preparing light olefin with methanol

A technology for the preparation of low-carbon olefins and methanol, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, ethylene production, etc., can solve the problems of low yield of low-carbon olefins, achieve high conversion rate, and reduce back-mixing , the effect of reducing methanol partial pressure

Active Publication Date: 2014-03-26
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 in the prior art, and a new method for preparing low-carbon olefins from methanol is provided

Method used

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  • Method for preparing light olefin with methanol
  • Method for preparing light olefin with methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] in such as figure 1 In the reaction device shown, the catalyst is SAPO-34, and pure methanol is fed. After the methanol is heated to 152°C, it enters the feed distribution area. The feed distribution area is embedded in the reaction area and is separated from the reaction area by an annular partition. Open, the height of the feed distribution area is 3 / 5 of the height of the reaction zone, the distance between the annular partition and the inner wall of the reaction zone is equal and the ratio to the diameter of the reaction zone is 0.1:1, and there are four raw materials in the axial direction of the annular partition Outlet, there are four raw material outlets at the bottom of the annular partition. The reaction conditions in the reaction zone are: the reaction temperature is 470°C, the reaction pressure is 0.1MPa in terms of gauge pressure, and the gas phase velocity is 1.25 m / s. The reaction products are analyzed by gas chromatography. , the low carbon olefin carbon...

Embodiment 2

[0020] According to the conditions and steps described in Example 1, methanol enters the feed distribution area after being heated to 300°C, and the feed distribution area is embedded in the reaction area, separated from the reaction area by an annular partition, and the feed distribution area The height is 4 / 5 of the height of the reaction zone. The distance between the annular partition and the inner wall of the reaction zone is equal and the ratio to the diameter of the reaction zone is 0.2:1. There are four raw material outlets in the axial direction of the annular partition, and an opening at the bottom of the annular partition. There is a raw material outlet, and the reaction conditions in the reaction zone are as follows: the reaction temperature is 500°C, the reaction pressure is 0.1MPa in terms of gauge pressure, the gas phase velocity is 1.5 m / s, and the reaction products are analyzed by gas chromatography. The light olefins at the reactor outlet The carbon-based yiel...

Embodiment 3

[0022] According to the conditions and steps described in Example 1, methanol enters the feed distribution area after being heated to 184°C, and the feed distribution area is embedded in the reaction area, separated from the reaction area by an annular partition, and the feed distribution area The height is 1 / 5 of the height of the reaction zone. The distance between the annular partition and the inner wall of the reaction zone is equal and the ratio to the diameter of the reaction zone is 0.01:1. There are two raw material outlets in the axial direction of the annular partition, and the bottom of the annular partition is opened. There are two raw material outlets. The reaction conditions in the reaction zone are as follows: the reaction temperature is 482°C, the reaction pressure is 0.1MPa in gauge pressure, the gas phase velocity is 1.43 m / s, and the reaction products are analyzed by gas chromatography. The olefin carbon base yield was 80.89% by weight.

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Abstract

The invention relates to a method for preparing light olefin with methanol, which mainly solves the problem that the yield of the light olefin is low in the prior art. The method for preparing the light olefin with the methanol mainly includes the following steps: (1) a reaction apparatus which comprises a reaction area, a sedimentation area, a steam stripping area and a feed distribution area is provided, the feed distribution area is embedded in the reaction area, and is partitioned from the reaction area by an annular partition, the height of the feed distribution area is one fifth to four fifth of the height of the reaction area, the space between the annular partition and the inner wall of the reaction area is uniform, the proportion between the diameter of the annular partition and the diameter of the reaction area is 0.05 to 0.2:1, the annular partition is provided with at least two material outlets in the axial direction, and the bottom of the annular partition is provided with at least one material outlet; (2) material which is mainly the methanol enters the feed distribution area, and enters the reaction area via the material outlets of the annular partition of the feed distribution area to be in contact with catalyst, and product containing the light olefin is produced. The technical scheme effectively solves the problem, and can be used in the industrial production of the light olefin.

Description

technical field [0001] The invention relates to a method for preparing light olefins from methanol. technical background [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): C07C11/04C07C11/06C07C1/20B01J8/18
CPCY02P30/20Y02P30/40
Inventor 齐国祯张惠明王洪涛
Owner CHINA PETROLEUM & CHEM CORP