In the production process of PPS polymerization, NMP decomposes at high temperature and produces methylamine and 1,4-butyrolactone. Methylamine will dissolve in solvent acetone will continue to accumulate and increase. When the acetone solvent is recovered by distillation, the methylamine impurity cannot be fully removed, and the acetone will change color after being stored for a long time, which will lead to the PPS products being coloured and even a reduced viscosity during the recycling process.
The ion exchange resin (IER) method is very excellent and efficient for acetone purification. Acetone will pass cation exchange resins first and then the anion exchange resins, more than 95% methylamine will be removed.
After ion exchange resin system purification, it’s weakly alkaline purified acetone, When it is used in the washing process of PPS, the filament breakage during the spinning process is reduced.
The Ion exchange resin, being a highly environment-friendly and reusable polymer separation medium with a service life of 2-4 years, has great advantages compared with other methods, such as hydrochloric acid, activated carbon, etc.
Sunresin has established its Remote Solution Operation and Monitoring Center (RESOM) recently, in an effort not only to offset the impact of the travel restrictions due to the pandemic, but also to develop this innovative initiative to a higher and permanent level in a sustainable manner.
The Seplite LSF983 is very suitable for hardness (calcium and magnesium) removal from potable water(household water filters, pitchers etc), beverage and food applications. Besides hardness, it can also help to reduce certain level of heavy metals as Copper, Lead etc.
The 20th World Pharmaceutical Raw Materials China Exhibition, CPhI China 2020, will take place from December 16th to 18th, 2020, at Shanghai New International Expo Center (SNIEC). Sunresin Invites You to Visit the 20th World Shanghai CPhI Exhibition.