Purification device of 2, 3, 5, 6-tetrachloropyridine

The purification unit, which combines crude product storage tanks, liquid alkali storage tanks, and other equipment, solves the problem of impurities in 2,3,5,6-tetrachloropyridine, enabling the production of high-purity products and the resource utilization of wastewater, thus meeting the needs of downstream products.

CN224126592UActive Publication Date: 2026-04-17JIANGXI ZHONGLI CHEM CO LTD +1
0 Cites 0 Cited by

Patent Information

Application Number
CN202520948487.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-14
Publication Date
2026-04-17
Estimated Expiration
2035-05-14

AI Technical Summary

Technical Problem

The existing technology for preparing 2,3,5,6-tetrachloropyridine contains a large amount of acidic waste and impurities, and the purity is difficult to meet the requirements of downstream products.

Method used

A purification device consisting of a crude product storage tank, a primary storage tank, a liquid alkali storage tank, a primary distillation column, a neutralization tank, an extraction and stratification tank, a secondary distillation column, a tertiary distillation column, and a triple-effect evaporator is used to achieve high-purity purification of 2,3,5,6-tetrachloropyridine through mixing, extraction, and distillation processes.

Benefits of technology

The production of high-purity 2,3,5,6-tetrachloropyridine has been achieved, meeting the needs of downstream products. At the same time, the high-concentration saline wastewater generated can be utilized, resulting in economic cost savings and conforming to the concept of green chemistry.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses a purification device of 2, 3, 5, 6-tetrachloropyridine. Comprising a crude product storage tank, a first-stage storage tank, a liquid alkali storage tank, a first-stage rectifying tower, a neutralizing tank, an extraction layering tank, a second-stage rectifying tower, a third-stage rectifying tower, a waste storage tank, a triple-effect evaporation device, a crude salt storage tank, a low-boiling-point mixture receiver, a finished product storage tank, a reboiler, a first condenser, a second condenser and a third condenser. The crude product storage tank is connected with an inlet of the first-stage storage tank through a pipeline, the side surface of the first-stage storage tank is connected with an inlet of the first-stage rectifying tower through a pipeline, and a bottom outlet of the first-stage storage tank is connected with an inlet of the reboiler through a pipeline; according to the utility model, multiple functions of mixing, extracting and rectifying are combined, high-purity 2, 3, 5, 6-tetrachloropyridine can be produced so as to meet the purity requirement of downstream products on 2, 3, 5, 6-tetrachloropyridine, and meanwhile, high-concentration salt-containing wastewater generated in the extraction process is subjected to triple-effect evaporation to obtain industrial salt for use.
Need to check novelty before this filing date? Find Prior Art