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Production method for linear alkylbenzenes

A technology of linear alkylbenzene and its production method, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, addition of unsaturated hydrocarbons and saturated hydrocarbons to produce hydrocarbons, etc. It can solve problems such as equipment corrosion and reduce energy consumption. consumption, reduce investment, and solve the effect of high energy consumption

Active Publication Date: 2018-07-31
南京三新化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the raw material containing high-carbon alcohol is mixed with benzene, a small amount of water will be produced under the catalysis of HF, which will cause corrosion to the equipment

Method used

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  • Production method for linear alkylbenzenes

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example 1

[0024] The process of the method for the present invention to produce linear alkylbenzene is as follows:

[0025] Adopt technology of the present invention, take the long-chain alkene that the Fischer-Tropsch synthesis method makes as raw material, wherein the mass fraction of the normal alkene of 10~13 carbon atoms is 23%, the mass fraction of oxygen-containing impurity amount is 6%, requires The mass fraction of water in commercially available benzene raw materials is below 0.1%.

[0026] Such as figure 1 As shown, after pretreatment in the next-door column The mass fraction of n-paraffin olefin fractions with 10-13 carbon atoms in stream 6 obtained by cutting is 60%, and the mass fraction of oxygen-containing impurities is 3%. Pretreatment next door tower The operating conditions are as follows: the operating pressure is 0.005MPa, the operating temperature at the top of the tower is 54°C, the operating temperature at the bottom of the tower is 106°C, and the theoretica...

example 2

[0033] By adopting the process of the present invention, the long-chain alkanes obtained by the Fischer-Tropsch synthesis method are used as raw materials, and the Fischer-Tropsch synthetic oil contains n-alkanes with 2 to 20 carbon atoms, of which n-alkanes with 10 to 13 carbon atoms The mass fraction of oxygen-containing impurities is 26%, and the mass fraction of oxygen-containing impurities is 5%. The benzene raw material is commercially available, wherein the mass fraction of water is below 0.1%.

[0034] Pretreated next door tower The mass fraction of n-paraffin olefins with 10-13 carbon atoms in stream 6 obtained by cutting is 63%, and the mass fraction of oxygen-containing impurities is 2%. Pretreatment next door tower The operating conditions are as follows: the operating pressure is 0.01MPa, the operating temperature at the top of the tower is 61°C, and the operating temperature at the bottom of the tower is 112°C. 16, 25, 32, 23.

[0035] Logistics 6 and logis...

example 3

[0041] By adopting the process of the present invention, the long-chain alkene obtained by the Fischer-Tropsch synthesis method is used as a raw material. The Fischer-Tropsch synthetic oil contains n-alkene with 2 to 20 carbon atoms, and n-alkane with 10 to 13 carbon atoms. The mass fraction of olefins is 25%, and the mass fraction of oxygen-containing impurities is 6%. Benzene raw material is commercially available.

[0042] pass the next tower The mass fraction of n-paraffin olefins with 10-13 carbon atoms in stream 6 obtained by cutting is 68%, and the mass fraction of oxygen-containing impurities is 2%. next door tower The operating conditions are as follows: the operating pressure is 0.015MPa, the operating temperature at the top of the tower is 67°C, and the operating temperature at the bottom of the tower is 130°C. 18, 28, 34, 24.

[0043] Logistics 6 and logistics 7 are separated from the extraction tower The bottom and the top of the stream enter, and the stre...

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Abstract

The invention discloses a production method and equipment for linear alkylbenzenes which are developed by taking Fischer-Tropsch synthetic oil as raw materials. The method is used for producing C10-C13 linear alkylbenzenes by carrying out a liquid-phase reaction on the raw materials, namely n-alkane olefins containing 2-20 carbon atoms in the Fischer-Tropsch synthetic oil under the conditions thatthe reaction temperature is 35-70 DEG C, the reaction pressure is 0.4-1MPa and the benzene / alkene molar ratio is (4-12):1. By using the production method and equipment, firstly, the aim of ''three reduction'' including energy consumption reduction, investment reduction and processing cost reduction is achieved better; and secondly, the problem that the raw materials for producing the linear alkylbenzenes are scarce at present is solved better. The production method and equipment can be directly used for industrial production of the linear alkylbenzenes. The method comprises the steps: separating n-alkane olefins from the Fischer-Tropsch synthetic oil serving as a raw material, carrying out refining to remove higher alcohols, and then, carrying out an alkylation reaction. The production method is characterized by comprising the steps: making the raw material enter a pretreatment dividing wall column, making n-alkane olefins from which 10-13 carbon atoms are separated enter an extraction column, removing alkanes of the higher alcohols, then, carrying out mixing with benzene and hydrofluoric acid, next, making the mixture enter an alkylation reactor, and making a reaction product sequentially pass through a deacidification column, a debenzolization column and a product dividing wall column to obtain the high-purity C10-C13 linear alkylbenzenes.

Description

technical field [0001] The present invention relates to a method and equipment for producing straight-chain alkylbenzenes by reacting alkene obtained by separating and refining Fischer-Tropsch synthetic oil raw materials with benzene, using a new raw material route, and specifically relates to the production of C10-C13 straight-chain alkylbenzenes method. Background technique [0002] C10~C13 linear alkylbenzene in alkylbenzene is an important organic chemical raw material, and its derivatives such as alkylbenzene sulfonate can be used to produce high-quality detergents. Alkylbenzenes with straight chains can be degraded by aerobic bacteria to avoid environmental pollution. [0003] In industry, the reaction of benzene and long straight-chain alkenes under the action of catalysts is mainly used to generate straight-chain alkylbenzenes. The process methods include solid aluminum trichloride catalytic process, fixed-bed reaction process, HF catalytic reaction process, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/70C07C15/107C07C7/00C07C7/04C07C7/10C07C11/02
CPCC07C2/70C07C7/005C07C7/04C07C7/10C07C2527/1206C07C15/107C07C11/02Y02P20/584
Inventor 孙兰义雷腾刘炜
Owner 南京三新化工科技有限公司
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