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Alkylation product treatment method

A treatment method, an alkylation technology, which is only applied in the fields of multi-stage series refining process treatment, organic chemistry, adsorption purification/separation, etc., and can solve problems such as separation system corrosion

Active Publication Date: 2017-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some studies have found that the aqueous phase of the toluene methylation reaction product is weakly acidic, which contains organic acids such as formic acid and acetic acid, which will cause corrosion to the subsequent separation system

Method used

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Experimental program
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Effect test

Embodiment 1

[0021] The specific implementation is as figure 1 figure 2 The device flow shown. Alkylation product 1 contains formic acid, acetic acid and other impurities, after being cooled to 60°C by cooler C1, it enters oil-water separation tank D1, and the water phase 3 and oil phase 4 separated by oil-water separation tank D1 are sent into the oil phase 4 through pump P1 Adsorption beds D2 and D3 (adsorption beds D2 and D3 can be switched according to the life of the adsorbent, or can be operated in cascade), and the oil phase 7 after adsorption is sent to the subsequent separation system for separation. The dilute lye 8 first enters the lye tank D4, and is sent to the pipeline of the water phase 3 through the pump P2, and undergoes a neutralization reaction with the water phase 3, and the neutralized water phase 11 is sent to the subsequent processing system.

[0022] Table 1 is the composition of the alkylation product. Table 2 is the feeding conditions of alkylation product and...

Embodiment 2

[0032] Such as figure 1 As shown, in the process flow of a treatment method for alkylation products, the gas phase reaction product 1 first enters the reaction product cooling system I to be cooled to the liquid phase, and the liquid phase reaction product is then sent to the oil-water separator II, and in the oil-water separator II The oil phase 6 separated in the process is sent to the oil phase adsorption bed III for adsorption treatment, and the treated oil phase 7 is sent to the subsequent separation system. The separated water phase 4 undergoes a neutralization reaction with the lye 3, and the neutralized water phase 5 is sent to a subsequent treatment system.

[0033] Such as figure 2 The industrial device process of the treatment method of the alkylation product shown, the alkylation product 1 contains formic acid, acetic acid and other impurities, after being cooled to 60°C by the cooler C1, it enters the oil-water separation tank D1, and the water separated by th...

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Abstract

The invention relates to an alkylation product treatment method. A problem that organic acids carried in an alkylation product corrode subsequent equipment is mainly solved. The method comprises the following steps: cooling the alkylation product through a reaction product cooling system, sending the cooled alkylation product to an oil-water separator for separation, sending the above obtained oil phase to an adsorption system, sending the above obtained organic acid adsorption removed oil phase to a subsequent separation system, adding a dilute alkaline solution to the above obtained water phase in order to neutralize the water phase, and sending the neutralized water phase to a sewage treatment system. The alkylation product treatment method well solves the technical problem, has the advantages of reliable purification effect and simple flow, and can be used in the alkylation industrial production flow.

Description

technical field [0001] The invention relates to a treatment method of an alkylation product, in particular to a treatment method of an alkylation product used in related processes such as benzyl methylation, toluene methylation, phenethylation and the like. Background technique [0002] Xylene is an important organic chemical raw material, mainly including ethylbenzene, p-xylene, o-xylene and m-xylene. Among the industrial triphenyls, toluene has the most abundant source, but its industrial use is far less than that of benzene and xylene, resulting in a relative surplus of toluene; and p-xylene is widely used in the fields of polyester fiber, medicine, pesticides, dyes and solvents. However, this product accounts for only 4.2% in pyrolysis gasoline, 7.5% in reformed oil, and 22-26% in C8 mixed aromatics, and the output is seriously insufficient. Therefore, it has always been an important research direction in petrochemical technology to convert toluene into p-xylene with st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/12C07C15/08C07C7/148C07C7/13C10G53/12
Inventor 杨卫胜李木金贺来宾郑均林
Owner CHINA PETROLEUM & CHEM CORP
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