Zero Waste Logo The Zero Wate Network the University of Texas at Arlington Center for Environmental Excellence Environmental Training Institute Logo  

Join Us on:

Social Network Nav Bar

Lean and P2 Workshops

Nov, 14-16, 2017,

Dec. 5-7, 2017




Environmental Management Systems Workshops

Lake Charles
Sep. 26-29, 2017

Dec. 12-15, 2017



Case Study Database

           Add Story    |    Search Case Studies    |   


Hoechst Celanese Chemical Group, Inc.

Year Submitted: 2003

Process: Chemical Storage and Delivery

Industry: Chemical Manufacturing

Wastes Reduced: VOC Emissions

Equipment: Floating Roofs

Location: Bay City TX

No. of employees: 375

Contact: I. O. Coleman, Jr., Ivey Wingard

Phone: (409) 245-4871, (409) 245-4871


Four internal floating roofs were installed at the Hoechst Celanese Chemical Group, Inc., Bay City Plant (BCP) during 1993. The roofs were installed in the isobutanol and normal butanol storage tanks.

P2 Application:

During the first installation, the roof had to be installed under extremely tight timing which required the work be installed using a 24-hour a day work schedule for two tanks for 7 days. The standard seal material used for the seal was not compatible with material inside the tank and the manufacturer had to produce a special elastomer for the seal materials. These seals were double wiper with a teflon cloth overwrap. A nitrogen blanketing system was installed in all of the tanks to reduce enhance the safety of the storage tanks.

Environmental Benefits:

The purpose of installing the internal floating roofs was to reduce air emissions from the Bay City Plant by 24 tons/yr. This project was a part of the plant Waste and Release Reduction (WARR) effort for 1993. Prior to the floating roof installation, the chemicals were stored at atmospheric pressure in cone roof storage tanks and emitted 26 tons/yr of chemicals to the atmosphere due to evaporative vapors escaping to the atmosphere.

Details of Reductions

Additional Information :

The project was completed in November 1993 on-time and within budget. There have been no problems since installation.

Source: TCEQ

SHEP Shield
Health and

ERP Shield

ESP Shield

EMP Shield

Attend a workshop and
earn credits toward a
Professional Certification



The Zero Waste Network is one of eight Pollution Prevention Resource Exchange P2RxCenters , serving as a national network of regional information centers: NEWMOA (Northeast), WRRC (Southeast), GLRPPR (Great Lakes), ZeroWasteNet (Southwest), P2RIC (Plains), Peaks to Prairies (Mountain), WSPPN (Pacific Southwest), PPRC (Northwest). We are a proud member of the National Pollution Prevention Roundtable.

National P2 Roundtable Logo