Cross-linking agent TAIC concentrating and refining process

Abstract

The invention provides a cross-linking agent TAIC concentrating and refining process. The process comprises the following steps: conveying a crude cross-linking agent into a distillation kettle through a pipeline, opening a valve of a steam pipeline on a distillation kettle jacket and a valve on a condensate water outlet pipeline, introducing steam into the jacket for heating, and controlling the temperature in the distillation kettle to be 120 DEG C; starting a water ring vacuum pump to vacuumize the distillation kettle, and concentrating the crude cross-linking agent; conveying the concentrated crude cross-linking agent to a raw material storage tank through a pipeline; opening a discharge valve at the bottom of the raw material storage tank, and discharging the crude cross-linking agent into a1-square-meter short-path molecular distiller; and controlling the temperature in the 1-square-meter short-path molecular distiller to be 100 DEG C + / -5 DEG C, separating finished products and semi-finished products in a micro-negative pressure state, enabling the finished products rapidly flow into a finished product receiving tank to be stored, and enabling the semi-finished products to slowly flow into a semi-finished product receiving tank to be temporarily stored. According to the technical scheme, the quality of the cross-linking agent TAIC is improved, the content of the cross-linking agent TAIC in a finished product is not lower than 99%, the acid value of the cross-linking agent TAIC is not larger than 0.5 mg KOH / g, and the yield of the cross-linking agent TAIC is high.

Description

technical field [0001] The invention relates to the technical field of crosslinking agent purification, in particular to a process for concentrating and refining crosslinking agents. Background technique [0002] The crosslinking agent TAIC is a multifunctional olefin monomer containing aromatic heterocycles, which has a wide range of applications in the modification of rubber materials, composite materials, resin materials and fiber materials, such as increasing the crosslinking density of materials, increasing grafting Import rate, shorten crosslinking time, improve scorch resistance, enhance vulcanized rubber hardness, improve chemical corrosion resistance, tensile strength, impact strength and bending strength, etc. [0003] In the related art, after the synthesis reaction of the cross-linking agent TAIC is completed, acid washing and alkali washing are carried out, and unreacted sodium hydroxide is easily mixed in the alkali washing process, which affects the product qu...

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Problems solved by technology

[0003] In the related art, after the synthesis reaction of the crosslinking agent TAIC is completed, pickling and alkali washing are carried out, and unreacted sodium hydroxide is easily mixed in the alkali cleaning process, which affects the product quality of the crosslinking agent, and the purity of the crosslinking agent TAIC is low , the yield is lower

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