Processing method of solid salt waste during production of triglycidyl isocyanurate
A technology of glycidyl ester and triglycidyl isocyanurate, which is applied in the field of treatment of solid salt waste in the production of triglycidyl isocyanurate, can solve the problems of low value of industrial salt, cumbersome operation, and high cost
Active Publication Date: 2015-02-18
HUANGSHAN JINFENG INDAL
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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, and the better solution is: "TGIC Clean 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 the ECH organic matter in the solid salt waste, the recovery rate of NaCl is low, because the solid salt waste also contains some water and the water contained in methanol, so part of the 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
Method used
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[0013] The application will be further described below by specific examples:
[0014] Put the wet salt (i.e. solid salt waste) obtained by crystallization and pressure filtration of the mixture listed in Table 1 into the vacuum salt drying furnace, close the feeding cover, and turn on the hot water circulation pump to the vacuum salt drying furnace. Internal heating, and at the same time start the stirring mechanism in the vacuum salt drying furnace to stir the solid salt waste. When the furnace temperature in the salt drying furnace rises to 80°C, turn on the water ring vacuum pump to evacuate the vacuum salt drying furnace. As the temperature of the wet salt in the furnace continues to rise, when the vacuum in the furnace reaches about -0.08Mpa, the liquid phase components in the wet salt will continue to evaporate and escape, and after being cooled by the condenser, the liquid will flow into the liquid phase receiving tank ;Continue heating, when the vacuum degree in the f...
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The invention discloses a processing method of solid salt waste during production of triglycidyl isocyanurate, which comprises the following steps that the solid salt waste is put into drying equipment to be heated until gas does not escape, the volatile escaped gas is condensed and then recovered, and the solid salt waste comprises wet salt which is obtained by crystallizing and filtering a mixture after cyclization reaction. The solid salt waste is directly processed through heating, so that organic substances and moisture in the solid salt waste are heated and evaporated; then the evaporated gas is condensed and recovered, so as to separate the salt from other components in the solid waste; and then the salt and the components are respectively utilized, thereby effectively processing the solid salt waste.
Description
technical field [0001] The invention relates to the field of triglycidyl isocyanurate production, in particular to a method for treating 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 inter...
Claims
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IPC IPC(8): B09B3/00C07D405/14
Inventor 洪昭雷王建坤
Owner HUANGSHAN JINFENG INDAL