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Method and device for acid washing of alkylation reaction effluent

A technology of alkylation reaction and effluent, which is applied in the field of alkylation waste acid treatment, can solve the problems of removing sulfuric acid and sulfuric acid ester, corrosion of downstream equipment, failure to fully utilize sulfuric acid, etc., to improve utilization efficiency and promote separation Effect

Active Publication Date: 2017-09-12
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing pickling methods and equipment cannot efficiently remove sulfuric acid and sulfuric acid esters, which will still cause corrosion problems to downstream equipment
And in the existing pickling method, the pickling sulfuric acid is added into the pickling tank at one time, so that part of the sulfuric acid is discharged from the pickling tank before it contacts with the alkylation product, and this part of the sulfuric acid cannot be fully utilized; Some pickling methods require subsequent alkali washing and other processes. On the one hand, it will unnecessarily increase irrelevant components in the alkylate oil, and on the other hand, it cannot avoid corrosion damage to subsequent equipment.

Method used

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  • Method and device for acid washing of alkylation reaction effluent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] according to figure 1 The process of pickling the alkylation reaction effluent shown is carried out, wherein the microchannel screen is randomly woven with a 316L wire mesh with a diameter of 100 μm, its thickness is 400 mm, and the porosity is 70%. The distance between each section of screen is 300mm, and the top of each section of screen is 80mm away from the mixed new sulfuric acid liquid distributor; 2 sections of separation packing are used, and the distance between each section of separation packing is 350mm. The porosity is 75%.

[0064] The main parameters of the pickling process of the alkylation reaction effluent: the working pressure of the pickling tank is 0.55MPa; the concentration of new sulfuric acid is 98% (WT), and the flow rate is 2.5m 3 / h; Alkylation reaction effluent treatment capacity is 100m 3 / h, its sulfuric acid content is 2000ppm, and total sulfur content is 990ppm.

[0065] Experimental results:

[0066] After pickling by the method and d...

Embodiment 2

[0068] according to figure 1 The process of pickling the alkylation reaction effluent shown is carried out, wherein the microchannel screen is randomly woven with 80 μm metal fiber material, the thickness of the screen is 300 mm, and the porosity is 70%. Three sections of screen are set, The distance between each section of wire mesh is 320mm, and the distance between the top of each section of wire mesh is 70mm from the mixed new sulfuric acid liquid distributor; the separation section of the pickling tank adopts 2 sections of separation packing, and the distance between each section of separation packing is 300mm. The porosity of the filler is 80%.

[0069] The main parameters of the pickling process of the alkylation reaction effluent: the working pressure of the pickling tank is 0.55MPa; the concentration of new sulfuric acid is 98% (WT), and the flow rate is 20m 3 / h; Alkylation reaction effluent treatment capacity is 600m 3 / h, its sulfuric acid content is 1800ppm, and...

Embodiment 3

[0073] according to figure 1 The process of pickling the alkylation reaction effluent shown is carried out, wherein the microchannel screen is woven with 60 μm fiber material, its thickness is 400 mm, and the porosity is 55%. Three sections of screen are set, and each section of screen is The distance between them is 300mm, and the top of each section of wire mesh is 80mm away from the mixed new sulfuric acid liquid distributor; 1 section of separation packing is used, the porosity of the separation packing is 75%, the thickness is 250mm, and 316L metal fiber and polytetrafluoroethylene fiber are used The material is woven.

[0074] The main parameters of the pickling process of the alkylation reaction effluent: the working pressure of the pickling tank is 0.55MPa; the new sulfuric acid concentration is 98% (WT), and the flow rate is 30m 3 / h; Alkylation reaction effluent treatment capacity is 1000m 3 / h, its sulfuric acid content is 2000ppm, and total sulfur content is 870p...

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Abstract

The invention relates to an alkylation reaction effluent pickling method and device, and provides an alkylation reaction effluent pickling method. The method comprises the following steps: (i) enabling the alkylate containing sulfuric acid liquid drops and sulfates and mixed fresh sulfuric acid to form a liquid film, thereby reinforcing the contact; and (ii) using a separation filler to reinforce the demulsification and coalescence of the sulfuric acid liquid drops and promote the separation between the alkylation reaction effluent and sulfuric acid, thereby completely removing the sulfates and sulfuric acid liquid drops in the alkylation reaction effluent. The invention also provides an alkylation reaction effluent pickling device.

Description

technical field [0001] The invention belongs to the field of alkylation waste acid treatment, and relates to a method and a device for pickling the reaction effluent in the alkylation reaction, more specifically, to the acid washing downstream of the reactor in the alkylation process using sulfuric acid as a catalyst. A method and device for pickling hydrocarbon phase effluent from a settling tank. Background technique [0002] At present, the increasingly serious environmental pollution is a major dilemma that China and the world are facing, and has had a great impact on people's production and life. Therefore, environmental protection has received widespread attention from all countries in the world. According to the data of the "China Environmental Status Bulletin" published by the Ministry of Environmental Protection of China in recent years, vehicle exhaust pollution accounts for about 20% of various pollution sources. Environmental protection puts forward stricter req...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/10
CPCC10G53/10
Inventor 白志山罗会清杨晓勇庞富龙朱勇
Owner EAST CHINA UNIV OF SCI & TECH
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