Reaction device for co-producing low-carbon olefin and p-xylene

A technology for p-xylene and low-carbon olefins, which is applied in the field of reaction devices for the co-production of low-carbon olefins and p-xylene, and can solve the problems of low yield of low-carbon olefins and p-xylene

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is the lower yield of low-carbon olefins (especially propylene) and p-xylene in the prior art, and a new reaction device for co-producing low-carbon olefins and p-xylene is provided

Method used

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  • Reaction device for co-producing low-carbon olefin and p-xylene
  • Reaction device for co-producing low-carbon olefin and p-xylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] in such as figure 1 On the reaction device shown, the catalyst is ZSM-5, SiO 2 / Al 2 o 3 The molar ratio is 20, the first raw material enters the first reaction zone, and contacts with the catalyst, wherein the first raw material includes 60% carbon four mixed hydrocarbons, 26% carbon five mixed hydrocarbons, and the rest is water vapor. 4. C5 mixed hydrocarbons are by-products of methanol conversion. The gas phase stream and catalyst generated in the first reaction zone enter the second reaction zone and contact with the second raw material comprising methanol and toluene, wherein the weight ratio of methanol to toluene in the second raw material is The mass flow rate of the second raw material is 1:5, and the mass flow rate of the second raw material is 2 kg / hour. The gas-phase stream and the catalyst generated in the second reaction zone are separated by the gas-solid rapid separation equipment and then enter the gas-solid separation zone. The separated gas-phase s...

Embodiment 2

[0033] According to the conditions and steps described in Example 1, the catalyst is ZSM-5, SiO 2 / Al 2 o 3 The molar ratio is 200, the first raw material enters the first reaction zone, and contacts with the catalyst, wherein the first raw material includes 48% carbon four mixed hydrocarbons, 37% carbon five mixed hydrocarbons, and the rest is water vapor. 4. C5 mixed hydrocarbons are by-products of methanol conversion. The gas phase stream and catalyst generated in the first reaction zone enter the second reaction zone and contact with the second raw material comprising methanol and toluene, wherein the weight ratio of methanol to toluene in the second raw material is The mass flow rate of the second raw material is 1:3, and the mass flow rate of the second raw material is 2.7 kg / h. The gas-phase stream and the catalyst generated in the second reaction zone enter the gas-solid separation zone after being separated by the gas-solid rapid separation equipment, and the separat...

Embodiment 3

[0035] According to the conditions and steps described in Example 1, the catalyst is ZSM-5, SiO 2 / Al 2 o 3 The molar ratio is 100, the first raw material enters the first reaction zone, and contacts with the catalyst, wherein the first raw material includes 54% carbon four mixed hydrocarbons, 31% carbon five mixed hydrocarbons, and the rest is water vapor. 4. C5 mixed hydrocarbons are by-products of methanol conversion. The gas phase stream and catalyst generated in the first reaction zone enter the second reaction zone and contact with the second raw material comprising methanol and toluene, wherein the weight ratio of methanol to toluene in the second raw material is The mass flow rate of the second raw material is 1:2, and the mass flow rate of the second raw material is 2 kg / h. The gas-phase stream and the catalyst generated in the second reaction zone are separated by the gas-solid rapid separation equipment and then enter the gas-solid separation zone. The separated ga...

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Abstract

The invention relates to a reaction device for co-producing low-carbon olefin and p-xylene, which is used for mainly solving the problem of lower yield of low-carbon olefin and p-xylene in the prior art. The problem is well solved by adopting the technical scheme as follows: the reaction device disclosed by the invention mainly comprises a first reaction zone 3, a second reaction zone 4, a third reaction zone 8, a gas-solid separation zone 5 and a regeneration zone 18 of a regenerator; the top of the first reaction zone 3 is connected with the second reaction zone 4; the outlet of the second reaction zone 4 is connected with the gas-solid separation zone 5; a product outlet 14 is arranged on the top of the gas-solid separation zone 5; the bottom of the gas-solid separation zone 5 is connected with the third reaction zone 8; the bottom of the third reaction zone 8 is connected with a stripping zone 11; the bottom of the stripping zone 11 is connected with the regeneration zone 18 of the regenerator through a spent catalyst inclined pipe 13; the bottom of the regeneration zone 18 of the regenerator is connected with a degassing zone 16; and the bottom of the degassing zone 16 is connected with the first reaction zone 3 through a regeneration catalyst inclined pipe 23. The reaction device for co-producing the low-carbon olefin and the p-xylene disclosed by the invention can be used in industrial production of the low-carbon olefin and the p-xylene.

Description

technical field [0001] The invention relates to a reaction device for co-producing light olefins and p-xylene. 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, biom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/26C07C15/08C07C11/04C07C11/06C07C2/66
CPCY02P20/52Y02P20/584
Inventor 齐国祯钟思青王洪涛王华文
Owner CHINA PETROLEUM & CHEM CORP
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