Polyvinyl chloride production (PVC)

Polyvinyl chloride production (PVC)

Filtration of the raw material VCM (vinyl chloride monomer)

It is particularly important that the VCM feedstock contains no visible gels or other contaminants. These impurities appear in the form of so-called "Fish Eyes", or small craters. PVC, which does not meet the required manufacturing specifications, can not come in highly critical applications used in which higher selling prices can be achieved. The filtration of VCM is therefore very important to maintain the quality of the PVC.

Filtration of unbound monomers

Non-bound monomers (mainly VCM) are recovered by a condenser. The recovery process generates foam in the reactor head space, which includes PVC beads. This PVC would start to get dirty in the capacitor, creating a trip occurs. Therefore, we recommend using a filter to protect the capacitor.

Filtration of vinyl acetate copolymer

Vinyl acetate copolymer (VAc) is sometimes used for this purpose in order to reduce the crystallinity and to allow for a lower processing temperature of the final product. VAc contains in formulations usually 9 to 15 percent by weight of monomers. If VAc is pumped to a reactor, we recommend a filter with an absolute retention rate of 5 microns. This can ensure a constant quality of the monomers.

The advantages of high-quality filtration systems

● Ensuring a trouble-free production of PVC quality products
● Higher sales
● maximizing profits
● Reduce downtime


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