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N va Technical data Sheep Basic Chemicals Company, LLC Technical & Environmental Services 800-752-5151 Use of Perchloroethylene In Isomerization Processes For many years carbon tetrachloride has been used.in the isomerizati n process in the Petroleum Refining industry. Since the Clean Air Act of 1990,where carbon tetrachloride was designated as an ozone depleting chemical, alternative products have been considered to replace carbon tetrachloride. In the isomerization process, chlorinated solvents are used as chloriding agents providing a source of Chloride Ion (CI-)which acts as a catalyst promoter. Chlorinated solvents are also used as a sourcA of chloride for reforming catalysts. The chloriding agent may be used in the reforming process as an activator during normal operation and during regeneration. As illustrated by the table below, perchloroethylene is especially suited for use as a chloriding agent due to the amount of Cl-it can provide. Relative feed rates may be determined from the amount of avai able chloride,but you should always consult with your process licensor prior to initiating any changes. The general requirements for chlorinated solvents in isomerization and r generation applications are for a high purity product with a minimum amount of oxygen and nitrogen compounds. Basic Chemic Is' Perchloroethylene, Isomerization Grade, meets these requirements. Many isomerization processes have been licensed by UOP, a leader in the catalyst industry and a leader in the search for alternative.chloriding agents. UOP has approved certain grades of perchloroethylene as an acceptable alternative to carbon tetrachloride in their isomerization process. Furthermore, Basic Chemicals' Perchloroethylene, Isomerization Grade, has been approved as meeting UOP's stringent specifications. If you have any questions regarding the specific requirements, please consult with your licensor. Carbon Perchloro- Trichloro- 1,1,1 Tri- Property Tetrachloride ethylene Ethylene chloroethane Formula CCI4 C2CI4 C2HCI3 C2H3CI3 Wt%Cl- 92.20 85.50 80.90 79.70 Ib Cl-per gal 13.20 11.50 9.90 8.70 Basic Chemicals' Perchloroethylene, Isomerization Grade, has a minimum of assay 99.995% (wt) perchloroethylene and contains only one stabilizer, p-tertiary amyl phenol (PTAP). This stabilizer is present at a maximum level of 15 ppm. The chemical formula for PTAP is C11H16O, which would contribute no more than 1.5 ppm oxygen to the product. The specification for water is a maximum of 25 ppm. This grade of perchloroethylene does not contain any nitrogen compounds. Perchloroethylene is not listed by the EPA as an ozone depleting substz nce and is not subject to regulatory phase-out. Further Information More detailed information is available upon request through the Basic Chemicals Company, LLC Technical Service Department. Call or write to: Technical Service Department Basic Chemicals Company, LLC Occidental Tower 5005 LBJ Freeway Dallas,Texas 75244 800-752-5151 Basic Chemicals Company, LLC believes the information contained herein is accurate;however, Basic Chemicals makes no guarantees with respect to such accuracy and assumes no liability in connection with the use of the information contalned herein by any party. The provision of the information contained herein and the provision of information by or reliance on Basic Chemicals Technical Service Department is not intended to be and should not be construed as legal advice or as ensuring compliance with any federal,state or local laws and regulations. Any party using this product should review all such laws,rules or regulations prior tousage.