Bio-Polymer Pilot Plant Fires Up

Friday, August 28, 2015 @ 05:08 PM gHale

Eric Cochran led the way, counterclockwise, from one 500-gallon industrial tank to another and then another.

By the time he got to the 1,300-gallon holding tank at the end he had explained how Iowa State University engineers are producing bio-polymers from soybean oil.

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And he was showing how, with support from an industrial partner, they’re about to ramp up bio-polymer production to the pilot-plant scale.

The research and development at that scale is possible via a new $5. 3 million Bio-Polymer Processing Facility located at Iowa State’s BioCentury Research Farm just west of Ames. The facility ended up built by Argo Genesis Chemical LLC, a sister company to Seneca Petroleum Co. Inc., of Crestwood, Illinois. They turned the facility over to Iowa State University July 31.

The target date to begin production is Sept. 1.

The huge tanks, the steel frame and all the tubes, pipes, hoses and wires connecting everything are a long way from the round-bottom flasks used by Iowa State’s Cochran and Christopher Williams to develop a process that converts soybean oil into thermoplastics. Those are soft, rubbery polymers that can melt and re-form over and over again.

Cochran, an associate professor of chemical and biological engineering, and Williams, the Gerald and Audrey Olson Professor in Civil Engineering and manager of the Institute for Transportation’s Asphalt Materials and Pavements Program, started their project in 2010 in a Sweeney Hall lab. Within a year they were making a few grams of biorenewable polymers from soybean oil, acrylic acid and a chemical process called atom transfer radical polymerization.

Now, after 18 months of designing and building, there’s a facility that uses their technology to make about 1,000 pounds of bio-polymers per day.

“This actually feels like a chemical plant,” Cochran said. “We’re working to scale up these processes and turn them into commercial products.”

Williams said taking the process from the lab to the pilot scale is all about “de-risking” the technology for companies that could be interested in producing hundreds of thousands of tons of bio-polymers a year.

Donald Sjogren, the specialty products manager for Seneca Petroleum and assistant to the manager for Argo Genesis Chemical, said the company was the first in the Midwest to add petroleum-based polymers to asphalt in the early 1990s. The idea was to add longevity and resilience to asphalt pavements and create a competitive advantage.

With the hope of eventually replacing the petroleum-based polymers in its asphalt with biorenewable ones, the company supported the laboratory work of Cochran and Williams. As the technology came together, the company licensed it from the Iowa State University Research Foundation and agreed to build a pilot-scale facility.

“We’re always interested in being the first in the industry to bring a biorenewable aspect to our products,” Sjogren said. “We are already working with the university on the next generations of these technologies.”

Once the facility is up and running, Sjogren said he expects high demand for asphalt mixed with the bio-polymers. He said there could be five test projects as early as next summer.

Williams and Cochran said the bio-polymers will also end up tested for use in adhesives, coatings and packing materials.

“The goal of all the partners here is to work together to take this technology to expedited commercialization,” Sjogren said.