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Alkaline cleaning method and equipment of solvent oil recovery system of polybutadiene rubber device

A polybutadiene rubber and recovery system technology, which is applied in the field of petrochemical tail gas recovery, can solve the problems of inconspicuous alkali washing effect, thermal stress corrosion of lye, and corrosion of the recovery system, so as to avoid Na+ exceeding the standard, solve corrosion problems, The effect of efficient separation

Active Publication Date: 2013-10-30
GANSU LANPEC TECH +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology generally adopts the following two methods to solve the equipment corrosion problem caused by the above-mentioned acidic substances: one is to carry out alkali elution acid treatment on the solvent oil after recovering butadiene through the injector, but due to the partial acidity generated in the above-mentioned recovery process The substance exists in the solvent oil in the form of "acid in oil", so the alkali washing effect is not obvious, and the subsequent recovery system has serious corrosion; the second is to first inject a certain concentration of NaOH solution into the cold solvent oil, and then make it Alkali neutralization measures mixed with glue tank exhaust gas injection to reduce the corrosion of the above-mentioned acidic substances on subsequent recovery system equipment
However, due to the high reaction temperature between the tail gas of the high-temperature glue tank and the circulating lye, there is a greater risk of lye thermal stress corrosion in the alkali washing tower

Method used

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  • Alkaline cleaning method and equipment of solvent oil recovery system of polybutadiene rubber device

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Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the polybutadiene rubber plant solvent oil recovery system alkaline cleaning equipment includes a primary alkaline cleaning unit, a secondary alkaline cleaning unit and a water washing separation unit connected in series through pipelines. The primary alkaline cleaning unit mainly includes solvent oil / alkali static mixers and injectors connected in series through pipelines; the secondary alkaline cleaning unit mainly includes fiber liquid membrane reaction equipment 3 connected by flanges and oil Alkali separation tank 4; the water washing unit mainly includes a solvent oil / water static mixer 6 and a water washing settling tank 7 connected in series through pipelines.

[0035] The alkaline cleaning method of the polybutadiene rubber plant solvent oil recovery system using the above-mentioned alkaline cleaning equipment, the specific steps are as follows:

[0036] In the primary alkaline cleaning unit, the cold solvent oil and a part of the ci...

Embodiment 2

[0044] Use the equipment described in embodiment 1, adopt the method similar to embodiment 1, just wherein in the one-level alkali cleaning unit, the volume ratio of circulating lye and cold solvent oil is 2: 10, and the mass fraction of circulating lye is 10 % of NaOH solution; in the secondary alkali cleaning unit, the volume ratio of the circulating lye and solvent oil is 3:10, and the circulating lye is a NaOH solution with a mass fraction of 10%; in the washing unit, the volume of process water and solvent oil The ratio is 1:20.

Embodiment 3

[0046] Use the equipment described in embodiment 1, adopt the method similar to embodiment 1, just wherein in the one-level alkali cleaning unit, the volume ratio of circulating lye and cold solvent oil is 1: 10, and the mass fraction of circulating lye is 20 % NaOH solution; in the secondary alkaline cleaning unit, the volume ratio of the circulating lye and solvent oil is 2:10, and the circulating lye is a NaOH solution with a mass fraction of 20%; in the water washing unit, the volume of process water and solvent oil The ratio is 1:20.

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Abstract

The invention provides an alkaline cleaning method of a solvent oil recovery system of a polybutadiene rubber device. The alkaline cleaning method comprises the following steps of: after cold solvent oil injected with alkali liquor enters alkaline cleaning equipment, firstly finishing absorption of butadiene and primary alkaline cleaning of the solvent oil in an ejector with glue-tank tail gas from a glue solution tank, and then carrying out secondary alkaline cleaning and water cleaning to remove acid materials generated in the solvent oil recovery system thoroughly. The alkaline cleaning equipment comprises a primary alkaline cleaning unit, a secondary alkaline cleaning unit and a water cleaning separation unit which are connected in sequence and in series. According to the method and the equipment provided by the invention, the efficiency of alkaline cleaning for removing acid is higher and the corrosion problem of the subsequent recovery system and equipment can be effectively solved.

Description

technical field [0001] The invention belongs to the field of petrochemical tail gas recovery, and in particular relates to an alkali cleaning method and equipment for a solvent oil recovery system of a polybutadiene rubber device. Background technique [0002] Polybutadiene rubber is a general-purpose synthetic rubber obtained by polymerizing 1,3-butadiene as a monomer. Its output and consumption are second only to styrene-butadiene rubber, ranking second in synthetic rubber. In particular, high-cis polybutadiene rubber has the advantages of high elasticity, excellent low temperature resistance and wear resistance, low cost, and wide application, so it has always occupied an important position in rubber production. [0003] In the production process of solution-polymerized high-cis-polybutadiene, the raw material polymerization-grade butadiene and the catalyst take fine solvent oil as the carrier, enter the polymerization kettle for reaction to form glue, and the glue is fla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/02C08L9/00
Inventor 李旭晖王运波吴忠军司海娟吕冲柏海燕闫森智徐明辉孙振尚立蔚
Owner GANSU LANPEC TECH