Vinylidene chloride monomer purification and rectification device and method thereof

Abstract

The invention discloses a vinylidene chloride monomer purification and rectification device and method, and the device comprises a rectification tower, a tower bottom reboiler, a heat energy supply system, a high-boiling residue storage tank, a first cooler, a second cooler and a vinylidene chloride storage tank, the heat energy supply system is arranged in the tower bottom reboiler and provides heat energy for the tower bottom reboiler, a high-boiling-point substance outlet of the tower bottom reboiler is connected with a high-boiling-point substance storage tank, a coarse vinylidene chloride inlet is formed in the side face of the rectifying tower, and a vinylidene chloride monomer outlet in the upper end of the rectifying tower is connected with a feeding port of the first cooler. A discharge port of the first cooler is connected with a feed port of the second cooler, and a discharge port of the second cooler is connected with a vinylidene chloride storage tank. According to the method, the separation of the high-boiling residues in the crude vinylidene chloride is realized, so that the crude vinylidene chloride is further purified, and the purity of the vinylidene chloride is improved, so that the vinylidene chloride can meet the requirements of producing food-grade PVDC resin.

Description

technical field [0001] The invention relates to a purification device and a method, in particular to a vinylidene chloride monomer purification and rectification device and a method thereof, belonging to the technical field of vinylidene chloride preparation. Background technique [0002] Food grade polyvinylidene chloride resin (referred to as PVDC resin) is produced by suspension polymerization. The production of food-grade PVDC resin requires high-quality vinylidene chloride monomer. Although there are many manufacturers of vinylidene chloride at home and abroad, most of them cannot directly polymerize and produce food-grade PVDC resin, forming the current implementation technology of various food-grade PVDC resin production plants. The pattern of barriers. The production of food-grade vinylidene chloride monomer requires very high purity, and the current production equipment and processes are difficult to meet the corresponding technical requirements. Therefore, it is n...

AI Technical Summary

Problems solved by technology

The production of food-grade PVDC resin requires high-quality vinylidene chloride monomer. Although there are many manufacturers of vinylidene chloride at home and abroad, most of them cannot directly carry out polymerization to produce food-grade PVDC resin, forming the current implementation technology of various food-grade PVDC resin production plants. Pattern of barriers

The production of food-grade vinylidene chloride monomer has very high purity requirements, and the current production equipment and processes are difficult to meet the corresponding technical requirements. Therefore, it is necessary to develop a new purification and distillation technology for vinylidene chloride monomer. Improve the purity of vinylidene chloride monomer, so as to meet the requirements for the production of food-grade PVDC resin

Images