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Nalco/Exxon Energy Chemical Company

Year Submitted: 2005

Process: Process Cleaning

Industry: Chemical Manufacturing

Wastes Reduced: Xylene

Location: Freeport TX

No. of employees: 48

Contact: Ly Nguyen

Phone: (409)233-3541


Since the products are manufactured in broad category, the reactor trains are washed after each product type is made. Xylene, a chemical listed on the Toxics Release Inventory (TRI), was used in large quantities as a solvent to clean reactors and in production. As part of the planning process, Nalco/Exxon identified xylene as a top priority for reduction and set a goal to eliminate xylene as a solvent.

P2 Application:

In 1993 the xylene solvent started to be replaced with Isopropyl Alcohol (IPA), which is not a TRI chemical. By 1996 Nalco/Exxon had successfully replaced all xylene used as solvent. IPA proved to be less efficient than xylene, requiring a larger volume of IPA solvent than the previous xylene amount. Nalco/Exxon has since gone beyond the planning requirements to look for ways to reduce the amount of IPA used.

Environmental Benefits:

Switching to Isopropyl Alcohol solvent: - reduced worker exposure to toxic chemicals and TRI releases and transfers. - resulted in a reduction of almost 50 tons of xylene waste in 1996.

Details of Reductions

Additional Information :

Nalco/Exxon has reduced its liability due to reduced worker exposure to toxic chemicals. The employees recognize the benefits of this change and support continuous improvements in waste elimination and reduction.

Source: TCEQ

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