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Method for treating waste gas during production process of Beta- fluorine sultone

A technology for the production process of fluorosultone, which is applied in the field of treatment of β-fluorosultone-containing waste gas, can solve the problems of unsatisfactory condensation effect, heavy operation load of ice machines, incomplete treatment, etc., and achieve social and economic benefits Significant, no secondary pollution, simple and practical effect

Inactive Publication Date: 2014-11-05
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process, manufacturers usually use cryogenic technology to condense and remove β-fluorosultone gas, but this method requires frozen brine at -15 to -40°C to remove β-fluorosultone gas. The ice machine has a large operating load, large loss and high energy consumption
In addition, when the exhaust gas flow rate is relatively large, it is impossible to condense all the exhaust gas containing β-fluorosultone, and the non-condensable gas in the exhaust gas also makes the condensation effect unsatisfactory, resulting in incomplete treatment

Method used

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  • Method for treating waste gas during production process of Beta- fluorine sultone
  • Method for treating waste gas during production process of Beta- fluorine sultone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The KF aqueous solution that is 20% by mass percent concentration and the NaOH aqueous solution that 40% by mass percent concentration are each 900L, pack in two spray towers respectively (V=3.5m 3 Tower kettle: Φ900×1500, tower body: Φ900×5000) for spraying, and at the same time will contain 400ppm exhaust gas is sprayed and absorbed through two spray towers at a space velocity of 5m / s. During the process of spraying and absorbing, KF aqueous solution and NaOH aqueous solution are continuously added to maintain the total amount and concentration of the spraying liquid at 10%. Within the time limit, the treated exhaust gas is discharged up to the standard, and samples are taken at the exhaust gas outlet for testing and analysis, but no gas.

Embodiment 2

[0022] The mass percent concentration of 10% CaF 2 The aqueous solution and the LiOH aqueous solution with a mass percentage concentration of 50% are each 900L, and are respectively loaded into two spray towers (V=3.5m 3 Tower kettle: Φ900×1500, tower body: Φ900×5000) for spraying, and at the same time will contain 600ppm waste gas is sprayed and absorbed through two spray towers at a space velocity of 7m / s in sequence, and CaF is continuously added during the spraying and absorption process 2 Aqueous solution and LiOH aqueous solution, in order to maintain the total amount and concentration of the spray liquid within 10%, discharge the treated waste gas up to the standard, take samples for detection and analysis at the waste gas outlet, and no gas.

Embodiment 3

[0024] 900L each of 30% NaF aqueous solution and 10% NaOH aqueous solution with a mass percent concentration are respectively loaded into two spray towers (V=3.5m 3 Tower kettle: Φ900×1500, tower body: Φ900×5000) for spraying, and at the same time will contain 500ppm exhaust gas is sprayed and absorbed through two spray towers at a space velocity of 6m / s. During the process of spraying and absorbing, NaF aqueous solution and NaOH aqueous solution are continuously added to maintain the total amount and concentration of the spraying liquid at 10%. Within the time limit, the treated exhaust gas is discharged up to the standard, and samples are taken at the exhaust gas outlet for testing and analysis, but no gas.

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Abstract

The invention discloses a method for treating waste gas during production process of Beta-fluorine sultone. The method comprises the step of feeding waste gas containing Beta-fluorine sultone in metal fluoride solution with the mass percentage concentration of 10% to 30% and alkali hydroxide solution with the mass percentage concentration of 10% to 50% in sequence at the airspeed of 5 to 7 m / s for absorption, and then discharging the treated waste gas reaching the standards. The method provided by the invention is simple and practical, can completely remove gas containing Beta-fluorine sultone, reduces energy consumption, causes no secondary pollution, can prevent waste gas containing Beta-fluorine sultone from destroying the surrounding ecological environment, and is very remarkable in social and economic benefits.

Description

technical field [0001] The invention relates to a treatment method for waste gas containing fluorine, in particular to a treatment method for waste gas containing β-fluorosultone. Background technique [0002] β-fluorosultone is a special fluorine-containing fine chemical. Because of its special heterocyclic structure, it can react with various alkenes, cycloalkanes, nucleophiles, etc. to synthesize fluorine-containing compounds of various structures. It is an important fluorine-containing intermediate. In the production process of β-fluorosultone, it is inevitable that a small part of β-fluorosultone gas exists in the waste gas. If it is discharged directly without treatment, it will inevitably cause serious environmental pollution, especially β-fluorosultone The gas will cause harm to the survival of plants in the surrounding environment, and will also cause damage to the human respiratory system. Therefore, research on the removal of β-fluorosultone waste gas is of grea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18
Inventor 成佳辉张庆华张士林付铁柱
Owner JUHUA GROUP TECH CENT