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Method for yield increase of ethylbenzene

A technology of ethylbenzene and ethane, applied in the field of increasing production of ethylbenzene, can solve the problems such as the tail gas not being effectively utilized, and achieve the effects of improving the utilization rate, increasing the output of ethylbenzene, and increasing economic benefits

Active Publication Date: 2013-02-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the defect in the prior art that the tail gas from refinery dry gas to ethylbenzene is not effectively utilized, and to provide a method for increasing the production of ethylbenzene by utilizing the tail gas in the refinery dry gas to ethylbenzene process

Method used

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  • Method for yield increase of ethylbenzene
  • Method for yield increase of ethylbenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] use as figure 2 The technological process shown, carry out the production of ethylbenzene. The ethylbenzene production includes refinery dry gas to ethylbenzene process and dry gas to ethylbenzene tail gas treatment process, the dry gas to ethylbenzene tail gas is the debenzene gas phase stream of tail gas containing ethane and hydrogen B1. Wherein, the process of producing ethylbenzene from refinery dry gas is the same as that in Comparative Example 1, and the debenzene gas phase stream B1 containing ethane and hydrogen is obtained.

[0061] The specific steps of the process of processing the debenzene gas phase stream B1 containing ethane and hydrogen are as follows:

[0062] (1) The debenzene gas phase stream B1 containing ethane and hydrogen is mixed with oxygen and preheated to 406 ° C and then sent to the hydrogen selective combustion reactor, the volume ratio of the debenzene gas phase stream B2 containing ethane and hydrogen to oxygen is 15.6, the absolute p...

Embodiment 2

[0067] use as figure 2 The technological process shown, carry out the production of ethylbenzene. The ethylbenzene production includes refinery dry gas to ethylbenzene process and dry gas to ethylbenzene tail gas treatment process, the dry gas to ethylbenzene tail gas is debenzene gas phase stream B2 containing ethane and hydrogen. Wherein, the process of producing ethylbenzene from refinery dry gas is the same as that in Comparative Example 1, and the debenzene gas phase stream B2 containing ethane and hydrogen is obtained.

[0068] The specific steps of the process of processing the debenzene gas phase stream B2 containing ethane and hydrogen are as follows:

[0069] (1) Preheat the debenzene gas phase stream B2 containing ethane and hydrogen to 346°C and send it to the hydrogen selective combustion reactor 7, and the air preheated to 346°C is sent into the hydrogen selective combustion reactor through multiple inlets , the volume ratio of the debenzene gas phase stream B...

Embodiment 3

[0074] use as figure 2 The technological process shown, carry out the production of ethylbenzene. The ethylbenzene production includes refinery dry gas to ethylbenzene process and dry gas to ethylbenzene tail gas treatment process, the dry gas to ethylbenzene tail gas is debenzene gas phase stream B3 containing ethane and hydrogen. Wherein, the process of producing ethylbenzene from refinery dry gas is the same as that in Comparative Example 1, and the debenzene gas phase stream B3 containing ethane and hydrogen is obtained.

[0075] The specific steps of the process of processing the debenzene gas phase stream B3 containing ethane and hydrogen are as follows:

[0076] (1) Preheat the debenzene gas phase stream B3 containing ethane and hydrogen to 500°C and send it to hydrogen selective combustion reactor 7, and at the same time preheat oxygen to 500°C and send it to hydrogen selective combustion from another inlet Reactor, the volume ratio of the debenzene gas phase flow B...

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Abstract

The invention provides a method for yield increase of ethylbenzene, and the method comprises the following steps: (1) performing gas-liquid separation of a product from dry-gas ethylbenzene production to obtain a gas-phase material flow, in a hydrogen selective combustion reactor, under a hydrogen selective combustion reaction condition and in the presence of a hydrogen selective combustion catalyst, performing debenzolization of the gas-phase material flow and contacting with oxidizable gas to obtain ethylene-containing mixed gas; (2) allowing the ethylene-containing mixed gas to contact and react with benzene under an alkylation reaction condition in the presence of an alkylation catalyst to obtain an ethylbenzene-containing mixture, wherein the oxidizable gas is oxygen or air. The method improves the utilization rate of dry gas raw materials and the ethylbenzene yield of an ethylbenzene production device by dry gas, and improves the economic benefits of enterprises.

Description

technical field [0001] The invention relates to a method for increasing the production of ethylbenzene Background technique [0002] In modern chemical production, ethylbenzene is an important raw material, mainly used for dehydrogenation to produce styrene, and styrene is used to make polystyrene and its copolymers. In the Chinese market, the demand for styrene is far greater than the production, and the dependence on foreign countries is as high as 60%. The production of ethylbenzene is mainly through the alkylation reaction of ethylene and benzene to synthesize ethylbenzene. According to the different raw materials, it can be divided into pure ethylene method and dilute ethylene method. Among them, the dilute ethylene method uses refinery dry gas as raw material, and uses benzene to react with ethylene in refinery dry gas to produce ethylbenzene. [0003] by figure 1 As an example, the prior art will be described in detail. figure 1 Shown is the process flow chart of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/073C07C2/66
Inventor 石莹张勇王国清张利军郝雪松张兆斌白杰杨沙沙
Owner CHINA PETROLEUM & CHEM CORP