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Method of adsorbing and desorbing benzene in acetylene

An acetylene and desorption technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of difficult treatment and utilization, strong irritating odor and malodorous odor, and relieve the pressure of subsequent treatment and utilization. The effect of reducing dosage

Pending Publication Date: 2020-03-10
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste sulfuric acid that has absorbed higher alkynes (AS) and water has a concentration of about 83wt%-85wt%, contains 8wt%-15wt% of organic matter and carbon impurities and about 2wt% of water, and has a density of 1.65-1.75g / ml. It is brown or dark brown, and has a strong pungent and foul odor, which brings great difficulties to handling and utilization

Method used

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  • Method of adsorbing and desorbing benzene in acetylene
  • Method of adsorbing and desorbing benzene in acetylene
  • Method of adsorbing and desorbing benzene in acetylene

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Adsorb and desorb benzene in acetylene according to the following methods, specifically:

[0025] A. According to figure 1 The device shown in the figure processes acetylene. The unpurified acetylene in the acetylene workshop passes through the rotameter and then enters the adsorption tower equipped with activated carbon. The purified acetylene enters the synthesis section. The outlet is equipped with a sampling point, and the inlet and outlet of the adsorption tower are connected to the differential pressure gauge. , used to measure the pressure difference between inlet and outlet, the filling volume of activated carbon is 350ml, the flow rate of acetylene is 90L / h, and the space velocity of acetylene is 257h -1 , the pressure difference between the inlet and outlet of the adsorption tower during operation is 5mm water column, and the pressure difference between the inlet and outlet of the adsorption tower is 5mm, and it is respectively at 0h, 1h, 3h, 5h, 7h, 9h, 11h, ...

Embodiment 2

[0039] Adsorb and desorb benzene in acetylene according to the following methods, specifically:

[0040] Experimental device used, step and parameter are identical with embodiment 1, and difference is the intake of acetylene and nitrogen, and the intake of acetylene is 45L / h in steps A and C, and the air velocity of acetylene is 129h -1 , the nitrogen intake in step B is 40L / h, and the nitrogen space velocity is 114h -1 , step A in 0h, 4h, 8h, 12h, 16h, 20h, 24h, 26h, 28h, 30h, 32h, 34h, 36h, 38h, 40h, 42h, 44h, 46h, 48h, 50h, 52h, 54h and After 56h, measure the benzene content and the water content in the acetylene at the outlet of the adsorption tower, and the results are as shown in table 4; the assay method of the benzene content in the acetylene is the same as the detection method of the benzene content in the acetylene at the outlet of the adsorption tower in step A of embodiment 1; After 0h, 0.5h, 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 6.5h and 8.5h, measure the benzene...

Embodiment 3

[0053] Adsorb and desorb benzene in acetylene according to the following methods, specifically:

[0054] Experimental device used, step and parameter are identical with embodiment 1, and difference is the intake of acetylene and nitrogen, and the intake of acetylene is 175L / h in steps A and C, and the air velocity of acetylene is 500h -1 , the nitrogen intake rate in step C is 140L / h, and the nitrogen air velocity is 400h -1 , measure the benzene content and water in the acetylene at the outlet of the adsorption tower after 0h, 2h, 4h, 6h, 8h, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 21h, 22h and 23h respectively in step A Content, the results are shown in table 7; Determination method is identical with the detection method of benzene content and water content in the outlet acetylene of embodiment 1 step A adsorption tower; In step B, respectively in 0min, 5min, 10min, 15min, 20min, 25min, 30min Measure the benzene content in the gas blown out of the reactor outlet after ...

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Abstract

The invention belongs the technical field of using methods such as adsorption, regeneration or reactivation for separating free carbon through chemical or physical change on the substance, and particularly relates to a method of adsorbing and desorbing benzene in acetylene, including steps of: A) feeding non-purified acetylene in an adsorption column loaded with activated carbon, and feeding the purified acetylene back to a vinyl acetate synthesis system; B) desorption regeneration of activated carbon: placing the activated carbon, after adsorption saturation, in a reaction kettle equipped with a heating jacket for desorption regeneration, wherein inert gas is fed to the bottom of the reaction kettle and is connected with a gas distributor at the bottom of the reaction kettle, so that whenthe reaction kettle is heated by the jacket, the benzene and water in the activated carbon are vaporized and are blown out by the inert gas, and feeding the blow-out gas to a boiler for combustion.The method can remove the benzene and saturation water in acetylene, wherein the activated carbon after adsorption saturation can be regenerated and recycled after treatment.

Description

technical field [0001] The invention belongs to the technical field of separating free carbon by means of adsorption, regeneration or reactivation, and specifically relates to a method for adsorbing and desorbing benzene in acetylene. Background technique [0002] Vinyl acetate (VAC for short), also known as vinyl acetate, is an important organic chemical raw material, mainly used in the production of polyvinyl acetate (PVAC), polyvinyl alcohol (PVOH), vinyl acetate-ethylene copolymer emulsion (VAE) Or copolymer resin (EVA), vinyl acetate-vinyl chloride copolymer (EVC), polyacrylonitrile comonomer and acetal resin and other derivatives, widely used in coatings, slurry, adhesives, vinylon, film, leather processing , synthetic fiber, soil improvement and other fields (“Research Progress in Synthesis of Vinyl Acetate by Acetylene Method”, Nie Ying, Acetaldehyde Acetic Acid Chemical Industry, No. 9, 2015, first paragraph of the left column on page 11, the publication date is Dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
CPCB01D53/04B01D2256/24B01D2257/702B01D2257/80B01D2259/40088
Inventor 何志群陈仕萍杨中明
Owner CHINA PETROLEUM & CHEM CORP
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