Drying equipment

China Drying News reported from the Sinopec Baling Petrochemical Company last week that its 10,000-ton/year ε-caprolactone process package project developed in cooperation with Shanghai Research Institute of Petroleum and Chemical Industry passed the review of Sinopec headquarters. The review experts believe that the successful industrialization of ε-caprolactone production technology will play an industrial supporting role for China's high-grade thermoplastic polyurethane, polyurethane coatings, adhesives, and degradable materials, and will also upgrade the industry of China's polyurethane industry. Provide high performance modified materials.

ε-Caprolactone is an important chemical intermediate whose main purpose is to prepare polycaprolactone polyol and thermoplastic polycaprolactone. However, at present, no domestic enterprises can produce ε-caprolactone, and its production technology has been monopolized by a few foreign companies. In 2011, the global total production capacity of ε-caprolactone was more than 60,000 tons.

In 2007, Baling Petrochemical began to develop ε-caprolactone production technology. In the pilot study stage, they completed the risk analysis of the preparation process of ε-caprolactone, accurately mastered the safety control points of raw materials and reactions, and found the key influencing factors of product quality. In October 2009, a 200-ton/year pilot plant was built, and the production was safe, stable, and long-term. The product quality met the standards of similar foreign products. The purity of ε-caprolactone was >99.5%, the acidity was <0.3%, and the moisture was <0.05%. , can meet the requirements of downstream users, and the waste generated in the production process after treatment can achieve compliance discharge. The company has thus become the only manufacturer in China that has successfully completed the ε-caprolactone trial and pilot technology development.

In December 2011, the ε-caprolactone pilot project passed the Sinopec Group pilot review. In 2012, Sinopec approved a 10,000-ton/year process package preparation project. During the implementation of the project, the Shanghai Research Institute of Petroleum and Petrochemicals completed the development and preparation of a 10,000-ton/year ε-caprolactone complete technology package based on the basic data and parameters of the pilot test, taking into full account the safety requirements.

According to reports, polycaprolactone (PCL) can be obtained by ring-opening polymerization of ε-caprolactone. The characteristics of low viscosity of polycaprolactone polyols are in polyurethane elastomers, thermoplastic polyurethanes, coatings, paints, and adhesives. The advantages in production and application are obvious, and both polyether and adipic acid polyester have excellent performance. The polycaprolactones and their copolymers obtained by the self-polymerization of ε-caprolactone or copolymerized with other monomers are recognized as biodegradable materials, have good ductility and flexibility that other degradable materials do not have, and can be produced. Degradable plastics. At the same time, because of its good biocompatibility, non-toxicity, good drug penetration, and low temperature memory function, it is also widely used in biomedical engineering.

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