Document Rab0gYGxpywbN9oennxz03mR7

To: P. L. Fetzer Interoffice Communication From: Dote: Subject: H. L. Hackett July 12, 1985 Flash Points of Current VCM Plant Tar Streams A study of the flash points of current VCM Plant tar streams has been made. The data is tabulated below. All determinations of flash points reported below were obtained by the Pensky-Marten closed cup method. An important observation that can affect the results when this equipment is used for flash points in the following. There is a fairly narrow range where the flash point can be detected. If the temperature goes much beyond the first flash point the very heavy tar vapor may sweep out the air that is necessary to observe a flash and the "dipping" flame will simply be extinguished. Thus the tester must be careful in interpreting a result of "no flash point because the flame is being extinguished." This smothering effect can be eliminated by using an "Open Cup" flash point method but flash points then usually are higher because the vapors tend to get diluted and/or blown away. These are, of course, the reasons that a particular flash point method must be specified. Homer L. Hackett Manufacturing Chemist Stream I.D EDCTS Feed (1985) EDCTS Pump Out If n fi 6-26-85 0700 6-26-85 n n rt 6-27-85 2300 VCTS/Pump Out 6-27-85 T --452 TARS Tank 6-27-85 TARS Truck 6-27-85 1700 nn 7-01-85 0900 n rt n 7-01-85 1900 7-03-85 0900 nn 7-10-85 1400 EDC % 20.6 6.2 7.6 16.5 33.2 4.8 9.3 5.44 8.3 6.88 1,1,2 42.76 25.4 23.5 24.4 0.2 N.D, 12.7 19.73 11.84 17.3 13.9 Flash "C 43 48 48 41 o 30 C 36.0 50 48 52 50 47 Point P 109 118 118 106 86 96.8 122 118 126 122 117 CUH 000006257