Drionex - Ion Exchange Resin

Drionex - the Ultimate Ion Exchange Resin is used in dry washing biodiesel. It helps remove contaminants and other impurities present in raw B-100 biodiesel without the need to wash with water.

Proudly manufactured in the USA, our biodiesel dry wash resin, Drionex DWR-10, is a high capacity cation resin. It consists of tough spherical beads with an average dry particle size of 400 microns.

Uniform Resin Gradation: For excellent cleaning results, resin particles have a uniform gradation, ranging between 200 microns and 800 microns, and weigh approximately 6.70 lbs. per gallon, or 50 lbs. per cubic foot.

Expansion Characteristics: Individual dry wash resin beads in Drionex swell to more than twice their dry size when exposed to water and/or glycerin. Therefore, it is important to allow for this expansion in the biodiesel dry wash towers to avoid possibility of rupture of the vessels.

Dry Washing Capacity: There are several factors that affect contaminant levels in B-100 biodiesel, including feedstock quality, and ineffective phase separation, etc.

21 lb. boxes are specifically packaged for the standard 6" dry wash towers. No measuring is required - simply pour the entire contents of the Drionex ion exchange resin in your dry wash column, and you are ready to start the biodiesel purification process. You will not find a lower price - anywhere.

In a well run dry washing system (average 500 ppm of hydroscopic contaminants), expect Drionex DWR-10 to purify 1,500 to 2,000 pounds of B-100 biodiesel for each pound of the resin used.

Size	Price/lb	Price	Order Now
Drionex 10 lb package	$7.25/lb	$72.50
Drionex 21 lb package	$7.00/lb	$147.00
Drionex 50 lb package	$6.75/lb	$337.50

If you would like to order Drionex in excess of 1,000 lbs., contact us for significant savings. We offer a very special price for bulk quantities!

Benefits: The resin offers significant performance and cost benefits, like;

• Removes glycerin and water
• Removes salts, soap, and catalyst
• Replaces the need for water washing or using magnesium silicate for biodiesel purification.
• Significantly reduces purification time as compared to water washing.
• Using methanol wash, the dry wash resin can be regenerated for extended use.
• Compared to other cationic resins, Drionex offers the lowest cost of per gallon purification of biodiesel fuel.

Where to Use: Dry Wash Resin is used only after phase separation, but it can be applied before or after demethylation, depending on glycerin level present.

• Glycerin > 1,000 ppm: If glycerin is greater than 1,000 ppm after demethylation, the resin will reach its maximum loading of glycerin before reaching the maximum capacity for salt and soap. In that circumstance the dry washing tower containing the ion exchange resin should be located before demethylation.

  In addition, to avoid waste, restoring the absorption capacity of the resin repeatedly until the salt capacity is exhausted, a methanol wash to remove glycerin from the ion exchange resin and returning the “dirty methanol” to the front of the process may be considered.

• Glycerin < 1,000 ppm: If glycerin is less than 1,000 ppm after demethylation, methanol wash may not be justified. In that case, dry wash resin is typically used in the final polishing step after demethylation.

In addition to optimizing upstream reactions and phase separation, using a lead/lag configuration to allow full exhaustion of the media can help maximize production from the dry wash media.

Methanol Wash: Suggested steps for washing with methanol.

• Drain all of the B-100 from the biodiesel dry washing column.
• Rinse the ion exchange resin with two bed volumes of clean methanol at a rate of one bed volume per hour. You will notice that the methanol is discolored by the glycerin.
• Repeat the procedure with one more bed volume of methanol at a rate of one bed volume per hour.
• Save the "dirty methanol" for use in transesterification.

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