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Method for separating benzene/toluene and methanol-alkylated reaction product

A technology of alkylation reaction and toluene, which is applied in the field of separation of benzene, or toluene and methanol alkylation reaction products, can solve the problem of high cost, achieve the effects of reducing corrosion, reducing process equipment requirements, and saving equipment costs

Inactive Publication Date: 2012-10-17
NINGXIA BAOTA PETROCHEM GROUP
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Problems solved by technology

In order to meet the anti-corrosion and improve the fractionation effect, the benzene toluene rectification tower made of stainless steel and with variable diameter is used, and the cost of the equipment is relatively high

Method used

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  • Method for separating benzene/toluene and methanol-alkylated reaction product

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Embodiment Construction

[0037] The high-efficiency oil-water separator used in the present invention is the JYF series high-efficiency oil-water separator produced by Jiangsu Asia Environmental Protection Co., Ltd. Concrete technological process of the present invention is as follows:

[0038] 1. Benzene or toluene, or the mixture of benzene and toluene and methanol alkylation reaction product (14) exits the reactor, cools down through the heat exchanger (1) and then enters the oil-water separation tank (2) for separation, and the oil phase is exchanged After the heater (4) heats up, the benzyl toluene rectifying tower (5) is removed, the water phase is removed to the high-efficiency oil-water separator (3), and the non-condensable gas (15) is discharged into the low-pressure gas pipe network.

[0039] 2. The water phase from the bottom of the oil-water separation tank (2) enters the high-efficiency oil-water separator (3) for deep separation, the oil phase is separated at the top, and the water phas...

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Abstract

The invention discloses a method for separating benzene / toluene and a methanol-alkylated reaction product. The method comprises the steps of: condensing the alkylated reaction product and separating a water phase and an oil phase from the condensed alkylated reaction product by an oil-water separation tank; making the water phase enter an efficient oil-water separator to be subjected to deep separation so as to separate the oil phase and the water phase; making the oil phase separated by the oil-water separator and the efficient oil-water separator enter an equal-diameter benzene / toluene tower to rectify to separate; returning the components on the top of the benzene / toluene tower to a reactor for continuously reacting or discharging out the components as process products from the benzene / toluene tower; making the components on the bottom of the tower continuously enter a dimethylbenzene rectification tower to rectify; and, finally separating the dimethylbenzene product. The process provided by the invention reduces the rectification need of benzene / toluene in the equipment. A separation process of alkylated reaction products that reduces the investment cost of the equipment is provided. The rectification efficiency and the recovery rate of the products are enhanced.

Description

technical field [0001] The invention relates to the separation technology of petrochemical products, in particular to a method for separating the alkylation reaction product of benzene or toluene and methanol. Background technique [0002] Alkylation reaction is an extremely important reaction in fine organic synthesis, and aromatic hydrocarbon alkylation is the basic method for the synthesis of alkylaromatic hydrocarbons. Aromatics can be used to synthesize functional products such as resins, medicines, solvents, synthetic detergents, and dyes through alkylation reactions. [0003] At present, there are many studies on the alkylation reaction of benzene and methanol. The patent (application number: 200910242740.5) discloses a method for the synthesis of xylene by alkylation of benzene and methanol. The patent (application number: 200910075173.9) discloses a method for producing toluene or xylene by alkylation of benzene and methanol. In addition, there are many studies on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/06C07C15/08C07C15/02C07C7/00C07C7/04
Inventor 陈宝林刘志华杨晓丽
Owner NINGXIA BAOTA PETROCHEM GROUP
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