Production method of dust-free cross-linked povidone

• Main Authors: CAO ZONGYUAN, SHEN GUANGHAI, LIU JIDONG, YANG XIHANG, HE QIN, MA YAN, GAO PENG, XIE LINHAO, SONG HONG
• Format: Patent
• Language: Chinese; English
• Published: 31.01.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention provides a production method of dust-free polyvinylpolypyrrolidone, and relates to the technical field of polyvinylpolypyrrolidone production. The method sequentially comprises a polymerization reaction process, a soaking and washing process, an air flow drying process and a tabletting and granulating process, the method comprises the following steps: firstly, carrying out free radical polymerization to obtain micro-powder cross-linked povidone, and then preparing dust-free cross-linked povidone by using a dry granulation technology, so that the fine powder rate of the product is reduced to below 1% under the condition that the basic performance of the cross-linked povidone product is not changed. The dust flying phenomenon in the using process of operators is remarkably reduced, the operation environment is improved, and the body health of the operators is protected. 本发明提供一种无尘型交联聚维酮的生产方法，涉及交联聚维酮生产技术领域。本发明依次包括聚合反应工序，浸泡、洗涤工序，气流干燥工序，压片造粒工序；即先通过自由基聚合得到微粉级交联聚维酮，再利用干法造粒技术制得无尘型交联聚维酮，在不改变交联聚维酮产品基本性能的情况