Crystallization process in synthesis of triglycidyl isocyanurate

Abstract

The invention relates to a crystallization process in synthesis of triglycidyl isocyanurate. The crystallization process comprises the following steps of: a mixing step, specifically, in a crystallization kettle, sufficiently mixing cyclization liquid and water to obtain first mixed liquid; a heating step, specifically, heating the first mixed liquid to 95-98 DEG C, and maintaining the temperaturefor 10-50 minutes; a crystallization step, specifically, cooling the first mixed liquid to below 40 DEG C, and maintaining the temperature for 10-50 minutes; and a separation step, specifically, separating and drying a crystal substance to obtain the solid triglycidyl isocyanurate. Based on the physical properties of components in the cyclization liquid, with the water adopted as a solvent, the yield of the triglycidyl isocyanurate is greatly improved, energy is saved, and the process is more environment-friendly and safer.

Description

technical field [0001] The invention relates to a crystallization process in the synthesis of triglycidyl isocyanurate. Background technique [0002] Triglycidyl isocyanurate (TGIC) has three active functional groups, and its structure determines that it has excellent heat resistance, weather resistance, light resistance, corrosion resistance and chemicals, as well as good mechanical properties and convenient use. It is widely used Curing agent or monomer for polymer materials. [0003] How to separate the corresponding products in the etherification and cyclization process of triglycidyl isocyanurate production process usually adopts crystallization process. The general idea of ​​crystallization is to dissolve the mixture with an organic solvent, and then cool and separate. [0004] The synthesis process of triglycidyl isocyanurate is the addition reaction of epichlorohydrin and isocyanuric acid under the action of a catalyst. The existing technology will use an excess ...

AI Technical Summary

Problems solved by technology

[0007] The current crystallization uses methanol as a solvent, which has the following defects: a) Methanol is a flammable liquid, and there are major safety hazards in the use and drying process; b) Methanol has a low boiling point and is a volatile solvent. A lot of VOC emissions, there are problems in environmental protection; c) The crystallization temperature of methanol is -10 degrees Celsius, and a refrigerator must be used; d) The methanol is fully recovered, and a refrigerator must be used

The existing technology must invest more in safety, environmental protection and energy saving in order to achieve

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