A tubular vacuum pyrolysis reaction device capable of continuously producing propiolactone

By using a tubular vacuum pyrolysis reactor, combined with a vacuum system and temperature gradient, the problems of low reaction efficiency and numerous by-products in lactide production have been solved, achieving efficient and continuous production, improving the yield and purity of lactide, and reducing energy consumption.

CN224405146UActive Publication Date: 2026-06-26HENAN XINGHAN BIOTECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Utility models(China)
Current Assignee / Owner
HENAN XINGHAN BIOTECHNOLOGY CO LTD
Filing Date
2025-06-23
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing lactide production equipment suffers from problems such as low reaction efficiency, discontinuous operation, high energy consumption, and numerous by-products, especially in batch reactors and rotary reactors.

Method used

The tubular vacuum pyrolysis reactor combines a vacuum system and a temperature gradient. The vacuum system maintains a low-pressure environment, while the heating system provides a temperature gradient. Combined with a high-precision metering pump and a PLC control system, continuous production is achieved, reducing byproduct generation and energy consumption.

Benefits of technology

It significantly improves the yield and purity of lactide, realizes efficient and continuous production of lactic acid polymers, reduces energy consumption and by-product generation, and features automated control and operational safety.

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Abstract

The utility model relates to the field of chemical industry, specifically disclose a kind of continuous production of lactide's tubular vacuum pyrolysis reaction device, comprising: reaction pipeline system, reaction pipeline system includes reaction tube, reaction tube bottom is connected with cauldron residual collection bottle, reaction tube downstream is connected with product collection system, and reaction tube upstream is equipped with feed inlet;The reaction tube is connected with vacuum system, and vacuum system is used to maintain the low pressure environment inside reaction pipeline to reduce reaction temperature and byproduct generation;The reaction tube is equipped with heating system, and heating system provides gradient temperature along the length direction of reaction pipeline;The product collection system, including condenser and collection bottle, is used to collect lactide product;Solve the problem that traditional equipment does not react evenly, operation is not continuous, byproduct is more and the like, significantly improve the yield and purity of lactide.
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