Treatment system for solid salt waste in triglycidyl isocyanurate production

Abstract

The invention discloses a treatment system for solid salt waste in triglycidyl isocyanurate production. The treatment system comprises a filtering device, a drying device and an organism recycling unit, the filtering device is used for filtering mixture after reaction is finished in a cyclization reaction kettle, the drying device is used for heating remaining solid salt waste after filtering of the filtering device, and the organism recycling unit is used for condensing and recycling gas escaping when the solid salt waste is heated. The mixture is filtered to obtain the solid salt waste, and the solid salt waste is heated in the drying device, so that organisms and moisture in the solid salt waste are heated and evaporated, salt and other components in the solid salt waste can be separated, the organisms escaping by evaporating are recycled and are used respectively, and the solid salt waste is effectively treated.

Description

technical field [0001] The invention relates to the field of triglycidyl isocyanurate production, in particular to a treatment system for solid salt waste in the production of triglycidyl isocyanurate. Background technique [0002] Triglycidyl isocyanurate (TGIC) is a new type of epoxy resin with excellent heat resistance, weather resistance, adhesion and high temperature electrical properties, high stability to acids, alkalis and other chemicals, and has special Excellent cross-linking and curing properties. It is one of the most important curing agents for base materials containing carboxyl functional groups, especially suitable for curing agents for carboxyl polyesters in powder coatings. [0003] The production process generally used by TGIC is attached figure 1 As shown, that is, epichlorohydrin (ECH), cyanuric acid (CA) and an appropriate amount of catalyst are added to the reaction kettle according to a certain ratio to carry out the synthesis reaction, and the inte...

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Problems solved by technology

[0004] At present, the reported solutions for the treatment of solid salt waste mainly use incineration or organic solvent extraction. The better solution is: "TGIC Cleaner Production Process Research", Feng Deli, et al. Progress in Fine Petrochemicals. 2007, 8(1): 56-58 discloses the adoption of adding methanol to extract and remove the ECH in the solid salt waste by suction filtration to prepare industrial salt (see its public document for details) figure 1 ), although this method can effectively remove ECH organic matter in solid salt waste, but the recovery rate of NaCl is low, because solid salt waste also contains some water and water contained in methanol, so part of NaCl will dissolve in water and it is difficult to recover

In addition, as the number of reuses of the extraction mother liquor increases, the salt production rate also decreases

At the same time, from the perspective of industrialization, the value of industrial salt itself is not high, the cost of methanol or ethanol extraction process is high, and the operation is relatively cumbersome, so it is difficult to apply industrially

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