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Crane & Company, Inc. - Substitution with Carbon Dioxide Eliminates Major Use of Sulfuric Acid. OTA 2003.

Crane & Company, Inc. reduced the use of sulfuric acid by approximately 697,000 lbs and sodium hypochlorite by 576,000 lbs between 1999 and 2000, a combined reduction of about 46%. The company achieved these reductions by modifying the process chemistry for the re-pulping of off-specification papers. The sulfuric acid was replaced with an innovative liquid carbon dioxide system and the sodium hypochlorite was reduced by specifying cleaner raw materials, and by controlling the temperature and pH of the process.

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