A cryogenic-range heat transfer fluid helped a specialty chemicals maker find a more effective way to achieve lower temperature processing.

Specialty chemical company Bedoukian Research says it realized a 200 percent increase in throughput after trying Paratherm CR heat transfer fluid.

A specialty chemical company has tested a new cryogenic-range heat transfer fluid and experienced higher efficiency at reducing temperatures from chemical reactions than from prior fluids used.

The low temperature fluid, Paratherm CR, was tried out by Bedoukian Research Inc., Danbury, Conn., a producer of fragrances, insect pheromones, food flavorings, pharmaceuticals and agricultural chemical products. As the company's production volumes and product lines grew, lower processing temperatures became a priority, according to the chemical maker. Bedoukian said that the fluid from Paratherm Corp., Conshohocken, Pa., let it realize a 200 percent increase in throughput, with higher purity for the larger-yield batches.

According to Bedoukian, Paratherm CR quickly proved to be a far more efficient at reducing temperatures from chemical reactions than any heat transfer fluid the company had previously used. "We were looking for a long time to find a thermal fluid that would do what we need it to do," general manager Greg Pignone said. "This is it."

Liquid nitrogen chills the Paratherm CR fluid before it circulates through the heat transfer jackets surrounding the reactors, which have capacities ranging from 50 to 200 gal. The fluid removes heat generated by chemical reactions that occur during manufacturing processes.



Liquid nitrogen chills the Paratherm CR fluid before it circulates through the heat transfer jackets surrounding the reactors. The fluid removes heat generated by chemical reactions that occur during manufacturing processes.

Many of Bedoukian's applications require cooling with temperatures below –76oF (–60oC), which is outside the range of d-limonene, a fluid Bedoukian had been using. Other fluids Bedoukian had tried over the years either thickened or froze below a certain temperature, usually about –50oF (–58oC), according to Paratherm. The CR fluid's high ASTM flashpoint ratings also improve plant safety.

Since the changeover, there have been larger yield batches. In addition, production time has been reduced by more than 50 percent.

"We are able to run some of our cooled chemical reactions twice as fast now," president Robert Bedoukian said. "We can run at much lower temperatures than before with better heat transfer. This opens the door for us to produce custom syntheses that we couldn't have attempted before."



For more information about low temperature heat transfer and cryogenic fluids from Paratherm Corp., W. Conshohocken, Pa., call (610) 941-4900; e-mail info@paratherm.com; or  visit www.paratherm.com.

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