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A kind of recycling method of the waste residue produced in the synthesis of triallyl isocyanurate

A technology of triallyl isocyanurate and allyl isocyanurate, which is applied in the field of chemical waste residue recycling, can solve the problems of occupying a large amount of land, high production cost and high environmental pollution, and achieves a high recovery rate , The effect of simple operation and low production cost investment

Active Publication Date: 2016-09-07
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Temporary stacking of waste slag obtained from the production of TAIC not only occupies a large amount of land, but also pollutes the environment because the waste slag contains toxic organic matter and a small amount of cyanate
The incineration treatment of the waste residue obtained from the production of TAIC needs to be incinerated at a high temperature above 600°C, resulting in high environmental pollution, serious waste of resources, and high production costs.

Method used

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  • A kind of recycling method of the waste residue produced in the synthesis of triallyl isocyanurate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pretreatment of waste slag: Firstly, the waste slag is ground, and the waste slag whose particle size is less than 200 mesh reaches about 80% through sieving.

[0032] Inorganic salt leaching: Add waste residue to distilled water at a ratio of 1g: 15ml into distilled water, keep the mixture at 30°C, rotate at 1000r / min, and stir for 30min; then filter with suction to obtain the filtrate mainly containing sodium chloride, adjust the filtrate with hydrochloric acid When the pH reaches 3.0, convert the sodium carbonate in the filtrate into sodium chloride; then pass the filtrate into a vacuum distillation device, heat it in a water bath, and control the temperature of the water bath to 80°C to remove impurities such as bromide ions and cyanate ions. When a large amount of crystals are precipitated , stop heating, and use the waste heat to evaporate the water; at the same time, collect the evaporated liquid for recycling.

[0033] The obtained inorganic salt crystals were c...

Embodiment 2

[0035] Pretreatment of waste slag: Firstly, the waste slag is ground, and the waste slag whose particle size is less than 200 mesh reaches about 80% through sieving.

[0036] Inorganic salt leaching: Add waste residue to distilled water at a ratio of 1g: 10ml into distilled water, keep the mixed solution at 50°C and rotate at 1000r / min, stir for 60min, and then filter with suction to obtain the filtrate mainly containing sodium chloride; adjust the pH of the filtrate with hydrochloric acid To 3.0, convert the sodium carbonate in the filtrate into sodium chloride; then pass the filtrate into a vacuum distillation device, heat the water bath to control the temperature of the water bath to 70°C, remove impurities bromide ions and cyanate ions, and stop when a large amount of crystals are precipitated. Heating, using the residual heat to evaporate the water to dryness. At the same time, the evaporated liquid is collected for recycling.

[0037] The obtained inorganic salt crystal...

Embodiment 3

[0039] Pretreatment of waste slag: Firstly, the waste slag is ground, and the waste slag whose particle size is less than 200 mesh reaches about 80% through sieving.

[0040] Inorganic salt leaching: Add waste residue to distilled water at a ratio of 1g: 20ml into distilled water, keep the mixed solution at 40°C and rotate at 1000r / min, stir for 45min, and then filter with suction to obtain the filtrate mainly containing sodium chloride; adjust the pH of the filtrate with hydrochloric acid To 3.0, the sodium carbonate in the filtrate is converted into sodium chloride; then the filtrate is passed into a vacuum distillation device, heated in a water bath, and the temperature of the water bath is controlled at 90°C to remove impurities bromide and cyanate ions. When a large amount of crystals are precipitated, Turn off the heat and use the residual heat to evaporate the water to dryness. At the same time, the evaporated liquid is collected for recycling.

[0041] The obtained in...

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Abstract

The invention discloses a method for recycling waste residues produced by synthesis of TAIC (triallyl isocyanurate). The method comprises steps as follows: (1) ground waste residues and distilled water are evenly mixed, a mixed liquid is obtained and subjected to suction filtration, and a filtrate is taken; (2) the pH value of the filtrate is adjusted to range from 2.5 to 3.5, then reduced pressure distillation is performed on the filtrate, sodium chloride crystals are separated out and washed by absolute ethyl alcohol, and then a sodium chloride product is obtained through vacuum drying. According to the treatment method, the ground waste residues are soaked in the distilled water and then subjected to suction filtration, and organic impurities are not dissolved in water, so that the organic impurities are removed in the form of filter residues, and the liquid inorganic salt filtrate is obtained finally; reduced pressure distillation is performed on the inorganic salt filtrate, the sodium chloride crystals are separated out and then subjected to washing and vacuum drying, and the sodium chloride product is obtained, so that the waste residues are recycled.

Description

technical field [0001] The invention relates to the technical field of recycling chemical waste residues, in particular to a treatment method for waste residues produced by triallyl isocyanurate (TAIC) synthesis. Background technique [0002] TAIC is a high-molecular-weight monomer of aromatic heterocycle-containing multifunctional olefin developed in the 1980s. It is a fine chemical product with a wide range of uses. Co-vulcanizing agent, cross-linking agent for unsaturated polyester FRP, internal plasticizer for polystyrene, etc. [0003] At present, domestic manufacturers mainly use cyanate as raw material to react with allyl chloride to synthesize triallyl isocyanurate (TAIC). The synthetic route is as follows: [0004] 3CH 2 =CH-CH 2 Cl+2NaCNO→TAIC+3NaCl [0005] The main raw materials of this method are cyanate and allyl chloride. Use dimethylformamide as solvent, sodium bromide and triethylamine as catalyst, reaction temperature is 110℃~130℃, sodium cyanate and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/04
Inventor 杨春平刘文灿何慧军曾光明吕黎何闪英邵京京赵坤
Owner ZHEJIANG GONGSHANG UNIVERSITY