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A kind of method of still residue treatment of 2-octyl-3 (2h)-isothiazolone

A technology of isothiazolone and kettle residue, which is applied in the field of hazardous waste disposal and pretreatment, can solve the problems of increasing the physical hazards of operators, increasing safety hazards, inconvenient storage and use, etc., and achieves the improvement of safety and occupational health protection. Inexpensive, easy-to-use effects

Active Publication Date: 2019-05-10
DALIAN JOIN KING FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of monoethanolamine to treat the residue in the kettle has the following disadvantages: (1) the melting point of monoethanolamine is 10.3°C, and it is inconvenient to store and use in winter; (2) the cost of monoethanolamine is relatively high; Putting it into the storage tank of the workshop or directly into the still residue treatment kettle increases the safety hazard and increases the degree of physical harm to the operator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) steam out the solvent of 45% of the total mass of the still residue mother liquor, the solvent involved in the 2-octyl-3(2H)-isothiazolone still residue of the present invention is ethyl acetate; the solvent can be recycled and utilized to save cost;

[0019] (2) in the still residue, drip the liquid caustic soda of step (1) gained mother liquor quality 50% by liquid caustic soda dripping tank, the time of dripping is 4 hours, because of acid-base neutralization exothermic heat up to 60 ℃ in the kettle, then with Stir at a speed of 110 rpm for 10 hours. During the stirring process, pour 8-10°C low-temperature water into the jacket of the treatment kettle to cool down to 25°C-27°C. The mass percentage of sodium hydroxide in the described liquid caustic soda is 30%.

[0020] The detection of residual active substances in the still residue requires the use of an external standard quantitative detection method. After the external standard quantitative detection and ana...

Embodiment 2

[0022] (1) steam out the solvent of 50% of the total mass of the still residue mother liquor, the solvent involved in the 2-octyl-3(2H)-isothiazolone still residue of the present invention is ethyl acetate; the solvent can be recycled and utilized to save cost;

[0023] (2) in the still residue, drip the liquid caustic soda of step (1) gained mother liquor quality 50% by liquid caustic soda dripping tank, the time of dripping is 5 hours, because acid-base neutralization exotherm is warming up to 70 ℃ in the kettle, then with Stir at a speed of 110 rpm for 15 hours. During the stirring process, pour 8-10°C low-temperature water into the jacket of the treatment kettle to cool down to 25°C-27°C. The mass percentage of sodium hydroxide in the described liquid caustic soda is 50%.

[0024] The detection of residual active substances in the still residue requires the use of an external standard quantitative detection method. After the external standard quantitative detection and an...

Embodiment 3

[0026] (1) steam out the solvent of 50% of the total mass of the still residue mother liquor, the solvent involved in the 2-octyl-3(2H)-isothiazolone still residue of the present invention is ethyl acetate; the solvent can be recycled and utilized to save cost;

[0027] (2) in the still residue, drip the liquid caustic soda of step (1) gained mother liquor quality 55% by liquid caustic soda dripping tank, the time of dripping is 4.5 hours, because acid-base neutralization exotherm is warming up to 65 ℃ in the kettle, then with Stir at a speed of 110 rpm for 15 hours. During the stirring process, pour 8-10°C low-temperature water into the jacket of the treatment kettle to cool down to 25°C-27°C. The mass percentage of sodium hydroxide in the described liquid caustic soda is 40%.

[0028] The detection of residual active substances in the still residue requires the use of an external standard quantitative detection method. After the external standard quantitative detection and ...

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Abstract

The invention relates to the technical field of hazardous waste pretreatment and particularly relates to a treatment method of reactor residues of 2-octyl-3(2H)-isothiazolone. The method comprises (1) distilling to obtain a solvent of which the mass is 45 to 50% the total mass of the mother liquor, and (2) adding a liquid alkaline of which the mass is 50 to 60% that of the mother liquor into the reactor residues drop by drop through a liquid alkaline dropwise addition pot in 4 to 5h, heating the materials to 60 to 70 DEG C, and stirring the mixture for 10 to 15h, wherein in stirring, low temperature water at a temperature of 8 to 10 DEG C is fed into a jacket of the treatment reactor so that the mixture is cooled to 25 to 27 DEG C. The method is simple in operation, does not need to be manually operated by tools such as a feeding pump, utilizes pipelines prepared in the workshop and is operated closedly.

Description

technical field [0001] The invention relates to a method for treating the residue of a fungicide product, and belongs to the technical field of hazardous waste disposal pretreatment. Background technique [0002] When the fungicide is used to treat the residue of the kettle, the original process is to add monoethanolamine to the residue of the kettle, heat it to 30-50°C under stirring, react at 30-50°C for 3-6 hours, and then add an appropriate amount of waste methanol to carry out deal with. [0003] The use of monoethanolamine to treat the residue in the kettle has the following disadvantages: (1) the melting point of monoethanolamine is 10.3°C, and it is inconvenient to store and use in winter; (2) the cost of monoethanolamine is relatively high; Putting it into the storage tank of the workshop or directly into the still residue treatment kettle increases potential safety hazards and increases the degree of physical harm to operators. Contents of the invention [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D275/03
CPCC07D275/03
Inventor 刘宏涛夏胜远
Owner DALIAN JOIN KING FINE CHEM CO LTD
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