Device and method for removing volatile organic compounds by vapor phase method polypropylene process

• Main Authors: LI YINUO, SUN LILI, HE KUN, PAN JIONGBIN, LYU SHIJUN, BAI MEI
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a device and a method for removing volatile organic compounds by a vapor phase method polypropylene process. The device comprises a powder filter and a degassing bin, and a powder heater is connected between the powder filter and the degassing bin through a pipeline; the polypropylene powder leaving from the powder filter enters a powder heater to be heated so as to removegas to be removed; and the powder heater is connected with the vacuum pump and is used for separating the powder from the gas to be removed. According to the method, polypropylene powder is filtered by a powder filter, the temperature of the powder is increased by a powder heater, and then the powder enters a degassing bin to be degassed. The powder is heated to 90-130 DEG C, VOC and oxygen-containing impurities are reduced to 20-100 mg/kg from 500-600 mg/kg after degassing, the problems are well solved, and the method can be applied to preparation of low-cost, low-VOC and high-quality isotactic, syndiotactic, random,