Preparation method of cross linking agent triallyl isocyanurate

A technology of triallyl isocyanurate and cross-linking agent, applied in the direction of organic chemistry, etc., can solve the problems of increased production cost, harmful salt-containing wastewater of biochemical pool microorganisms, etc., and achieves reduction of energy consumption or equipment investment cost, Significant environmental protection and economic benefits

Active Publication Date: 2012-11-14
HEFEI UNIV OF TECH +1
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Problems solved by technology

This method of separating sodium chloride will produce a large amount of high-concentration saline wastewater that is harmful to microorganisms in the biochemical tank of the sewage treatment station, and cannot directly enter the main pipe of

Method used

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  • Preparation method of cross linking agent triallyl isocyanurate
  • Preparation method of cross linking agent triallyl isocyanurate

Examples

Experimental program
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Embodiment 1

[0031] In a 500L stainless steel reaction kettle equipped with a thermometer, stirrer and reflux condenser, add 184kg of dimethylformamide (DMF), 1.8kg of calcium chloride, 88kg of sodium cyanate (content 95%), and 1.4kg of triethylamine , heated to 110°C under stirring, slowly added 96.0kg of chloropropene (content 98%) into the reaction kettle dropwise within 3 hours, after adding chloropropene, 1.5kg of sodium chloride crystals and 1.5kg of tetrabutyl chloride The amine was added into the reaction kettle, and the stirring reaction was continued at 120°C for 3 hours, and the temperature was lowered to room temperature after the reaction was completed. The sodium chloride solid in the reaction liquid is separated by pressure filtration, and the sodium chloride filter cake is rinsed with fresh or recycled DMF40kg, and the washing liquid is incorporated into the filtrate to obtain a mixed solution. Sodium chloride is dried through vacuum drier and reclaims DMF solvent simultane...

Embodiment 2

[0034] Add 190kg DMF, 2.0kg calcium chloride, 88kg sodium cyanate (content 95%), 1.0kg potassium bromide into a 500L stainless steel reaction kettle equipped with a thermometer, agitator and reflux condenser, and heat to 115°C under stirring , 96.0kg of allyl chloride (content 98%) was added dropwise to the reactor within 3 hours. After the addition of allyl chloride, 2.0kg of sodium chloride crystals and 2.0kg of benzyltriethylammonium chloride were added to the reactor. The stirring reaction was continued at 130° C. for 3 hours, and the temperature was lowered to room temperature after the reaction was completed. The sodium chloride solid in the reaction solution was separated by pressure filtration, washed once with 40 kg of fresh DMF, and the washing solution was incorporated into the filtrate to obtain a mixed solution. The filter cake was dried to obtain 74.0kg of sodium chloride by-product with a white appearance, a content of 96.0%, and a recovery rate of 96% of sodium...

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Abstract

The invention discloses a preparation method of cross linking agent triallyl isocyanurate. In the reaction process of synthesizing triallyl isocyanurate by chloropropene and alkali cyanate, the thick powdered sodium chloride precipitated during the reaction process is transformed into crystallized sodium chloride with large particles by adding a crystallizing agent and controlling reaction temperature and reaction time, and the crystallized sodium chloride can be separated by simple filter operation, then is subjected to washing and vacuum drying to recover solvent, so as to obtain sodium chloride byproduct with industrial application value and purity of about 95%. According to the invention, the method of dissolving and separating sodium chloride by water phase in TAIC (triallyl isocyanurate) production technique is changed into the filter separation method, in this way, the problem of discharge and high treatment cost of the salt-containing waste water is avoided, and the TAIC (triallyl isocyanurate) crude product with brown appearance is purified by molecular short-path distillation, so as to obtain colourless TAIC (triallyl isocyanurate) product.

Description

1. Technical field [0001] The invention relates to a preparation method of a crosslinking agent, in particular to a preparation method of a crosslinking agent triallyl isocyanurate. 2. Background technology [0002] Cross-linking agent TAIC, the scientific name is Triallyl isocyanurate (Trallyl isocyanurate, referred to as TAIC), the structural formula is as follows: [0003] [0004] TAIC is a colorless oily liquid or crystal with a melting point of 24°C. It is a multifunctional olefin monomer containing a triazine ring. TAIC is mainly used as a cross-linking modifier for thermoplastic polymer materials (polyethylene, polyvinyl chloride, chlorinated polyethylene, EVA, polystyrene, etc.). When thermally cross-linking, the amount of TAIC added is 1-3 of the resin amount. %, 0.2-1% dicumyl peroxide (DCP) needs to be added in addition; when radiation crosslinking, the amount of TAIC added is 0.5-2% of the resin amount, and DCP is not required. After the thermoplastic polym...

Claims

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Application Information

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IPC IPC(8): C07D251/34C08K5/3492
Inventor 吕建平杨康赵卫平姚晓雪
Owner HEFEI UNIV OF TECH
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