PUROLITE^® PD206 is a polishing media specifically formulated for removing by-products remaining after transesterification to produce biodiesel. PUROLITE^® PD206 is supplied in the dry form with an optimized residual moisture content.

PUROLITE^® PD206 is designed for use in “purification” vessels installed after phase separation. Point of use can either be before demethylation to remove catalyst and glycerin and prevent back reactions or after demethylation as a “final” polishing step. This media may replace magnesium silicate “wash” and water wash. PUROLITE^® PD206 improves plant productivity and lowers operation costs while enabling ASTM or EN specifications for B100 to be achieved.

PUROLITE^® PD206 has a long life before exhaustion. This life is dependent upon the point of installation in the biodiesel process and on the level of impurities in the untreated biodiesel. PUROLITE^® PD206 functions both as a dehydrating (desiccant) media and as an ion exchange polishing media. As a desiccant PUROLITE^® PD206 has a high loading capacity to absorb free glycerin. Trace methanol and water although being absorbed to a limited degree should be removed by stripping in the demethylation column. Additionally the exceptional exchange capacity removes residual catalyst, and salts that remain after phase separation.

PUROLITE^® PD206 is flowable both in the dry form and when exhausted, making it easy to handle during installation and removal from “purification” vessels. PUROLITE^® PD206 is fully compatible for use in methyl ester and ethyl ester purification processes.

PUROLITE® PD206 can be washed with methanol on site several time to maintain it's ability to remove glycerin. However it must be ionically regenerated to maintain the ability to remove trace catalyst and soaps. Consult your Purolite representative for availability and details.

The actual life of PUROLITE^® PD206 will vary depending on process designs and operating characteristic of methyl ester feed quality.

Once PUROLITE^® PD206 is ready for disposal, it should be disposed of in approved landfills or facilities according to local regulations. Check with your local waste management company for proper disposal instructions.