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Alkylate treatment method

A treatment method, an alkylation technology, applied in organic chemistry, adsorption purification/separation, etc., can solve problems such as separation system corrosion, achieve low equipment investment, solve corrosion, and simple and reliable operation

Active Publication Date: 2014-05-07
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 and figure 2 The device flow shown. The raw material 1 is sent into the reaction system after exchanging heat with the reaction product gas 4 first, and the obtained alkylation product 3 contains impurities such as formic acid and acetic acid, and the alkylation product 3 first enters the adsorption bed D1 (this adsorption bed can be an independent adsorption bed, It can also be filled with adsorbent in the reactor), after being deacidified by high-temperature catalytic reaction, it is sent to the subsequent cooling system, and after being cooled to 60°C by the inlet and outlet heat exchanger E1, air cooler A1, and water cooler C1, it enters the oil-water separation tank D2 , the oil phase 8 separated by the oil-water separation tank D2 is sent to the subsequent aromatics separation system, and the water phase 9 separated by the oil-water separation tank D2 is sent to the subsequent sewage treatment system.

[0022] Table 1 ...

Embodiment 2

[0025] The specific implementation is as figure 1 and figure 2 The device flow shown.

[0026] figure 1 In the process flow of an alkylation product treatment method shown, the gas phase reaction product 1 first enters the high-temperature deacidification system I to remove organic acids, and the deacidified reaction product 2 is sent to the reaction product cooling system II to be cooled to the liquid phase , the liquid phase reaction product 3 is sent to the oil-water separator III, the oil phase 4 separated in the oil-water separator III is sent to the subsequent separation system, and the separated water phase 5 is sent to the subsequent sewage treatment system.

[0027] figure 2 The industrial device process of an alkylation product treatment method is shown. The raw material 1 is first exchanged with the reaction product gas 4 and then sent to the reaction system. The obtained alkylation product 3 contains impurities such as formic acid and acetic acid. The alkylat...

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Abstract

The invention relates to an alkylate treatment method, and mainly solves the problem that in the prior art, organic acid in alkylate can corrode follow-up equipment. Through the adoption of the technical scheme that the alkylate treatment method sequentially comprises the following steps: feeding an alkylation reaction product into an adsorption bed with an absorbent to obtain a deacidified gas phase reaction product, wherein the absorbent is a solid alkali absorbent, cooling the gas phase reaction product, feeding into an oil-water separator for separation to obtain an oil phase product and a water phase product after cooling the gas phase reaction product, feeding the oil phase product into a follow-up fractionating system, and feeding the water phase product into a follow-up sewage treatment system, the technical problem is well solved, and the purification method can be applied to industrial production process of alkylation.

Description

technical field [0001] The invention relates to an alkylation product treatment method, in particular to an alkylation product treatment method used in related processes such as benzene 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 strong mark...

Claims

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Application Information

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IPC IPC(8): C07C7/12C07C7/13C07C15/06
Inventor 杨卫胜李木金贺来宾郑均林
Owner CHINA PETROLEUM & CHEM CORP
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