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Method for preparing tolyltriazole (TTA) sodium salt solution by utilizing TTA former fraction

A technology of front distillate and sodium salt, applied in the field of preparation of TTA sodium salt solution, can solve problems such as turbidity not meeting product quality, accumulation of front distillate, etc., and achieve the effects of improving yield, improving economic benefits, and reducing pollution

Inactive Publication Date: 2013-02-06
江阴金山福达化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The front fraction of the rectification tower is darker in color, and the turbidity of the 50% sodium salt prepared with the TTA front fraction often does not meet the product quality, resulting in the long-term accumulation of the front fraction, which cannot be processed

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing TTA sodium salt solution by using TTA front distillate, using factory rectification tower waste as raw material to prepare turbidity is 50% TTA sodium salt, specifically comprising the following steps:

[0021] (1) Put 3000kg of 30% liquid caustic soda, 900kg of deionized water and 3000kg of the pre-TTA fraction into the preparation kettle respectively, turn on the stirring device and control the temperature of the kettle to be 80±1°C to dissolve TTA;

[0022] (2) After TTA is dissolved, put 35kg of decolorizing agent into the preparation kettle, control the temperature of the kettle to 70±1℃, and stir for 1h;

[0023] (3) Open the circulating filter device to remove the decolorizer in the TTA sodium salt solution, and pour the prepared 50% TTA sodium salt solution into the finished product tank through coarse filtration and fine filtration;

[0024] The prepared 50% TTA sodium salt is sampled and analyzed, and the turbidity, chromaticity, pH valu...

Embodiment 2

[0026] A method for preparing TTA sodium salt solution by using TTA front distillate, using factory rectification tower waste as raw material to prepare turbidity is 50% TTA sodium salt, specifically comprising the following steps:

[0027] (1) Put 3000kg of 30% liquid caustic soda, 900kg of deionized water and 3000kg of the pre-TTA fraction into the preparation kettle respectively, turn on the stirring device and control the temperature of the kettle to be 80±1°C to dissolve TTA;

[0028] (2) After TTA is dissolved, put 28kg of decolorizing agent into the preparation kettle, control the temperature of the kettle at 80±1°C, and stir for 1 hour;

[0029] (3) Open the circulating filter device to remove the decolorizer in the TTA sodium salt solution, and pour the prepared 50% TTA sodium salt solution into the finished product tank through coarse filtration and fine filtration;

[0030] The prepared 50% TTA sodium salt is sampled and analyzed, and the turbidity, chromaticity, pH...

Embodiment 3

[0032] A method for preparing TTA sodium salt solution by using TTA front distillate, using factory rectification tower waste as raw material to prepare turbidity is 50% TTA sodium salt, specifically comprising the following steps:

[0033] (1) Put 3000kg of 30% liquid caustic soda, 900kg of deionized water and 3000kg of the pre-TTA fraction into the preparation kettle respectively, turn on the stirring device and control the temperature of the kettle to be 80±1°C to dissolve TTA;

[0034] (2) After TTA is dissolved, put 42kg of decolorizing agent into the preparation kettle, control the temperature of the kettle at 80±1°C, and stir for 0.5h;

[0035] (3) Open the circulating filter device to remove the decolorizer in the TTA sodium salt solution, and pour the prepared 50% TTA sodium salt solution into the finished product tank through coarse filtration and fine filtration;

[0036] The prepared 50% TTA sodium salt is sampled and analyzed, and the turbidity, chromaticity, pH v...

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Abstract

The invention relates to a method for preparing a tolyltriazole (TTA) sodium salt solution by utilizing a TTA former fraction. The method comprises the following steps: placing the TTA former fraction, liquid alkali and deionized water into a sodium salt preparation kettle; controlling the temperature of the kettle to be 40 to 100 DEG C; stirring for 0.5 to 1 hour; adding a decolorizing agent; reacting with stirring; and filtering out the decolorizing agent to obtain the TTA sodium salt solution. Compared with the conventional 50 percent TTA sodium salt preparation method which adopts the intermediate fraction of a TTA rectification tower so as to waste a large number of TTA former fractions, the method adopts the one-step decolorizing procedure to utilize the TTA former fractions which cannot prepare 50 percent TTA sodium salt originally, so that the problem about the former fraction which puzzles factory production for a long time is solved, the cost is saved and the economic benefit is greatly increased.

Description

technical field [0001] The invention relates to a preparation method of TTA sodium salt solution, in particular to a method for preparing TTA sodium salt solution by utilizing TTA front distillate. Background technique [0002] Tolyltriazole (TTA), molecular formula C 7 h 7 N 3 , Molecular weight 133.16, appearance is light yellow granule or powder. It is a metal ion that settles out of solution, thus acting as a protection against galvanic corrosion for golden yellow metals. Tolyltriazole has better corrosion inhibition performance, oxidation resistance, high temperature resistance and long-term storage performance, and can be widely used as a substitute for benzotriazole in lubricating oil, metal processing fluid, cutting fluid, antifreeze, Brake fluid, circulating cooling water system, etc. [0003] TTA is used as a factory product in the form of 50% sodium salt, and TTA prepared with 50% sodium salt is the middle distillate of the rectification tower. The front fra...

Claims

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Application Information

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IPC IPC(8): C23F11/00
Inventor 张李伟李盛林朱雪峰卫一龙
Owner 江阴金山福达化工有限公司
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