Document rpK3JM1Dxbznj67wmVQqeZd1G

)1 B.F. Goodrich Chemical Company Inter-Organization Correspondence To W. E. McCormick From E. G. DeCapita (EGD-34-70) Location Akron Location AIDC Department Department Subject GC Analysis of Pechiney-Saint-Gobain Reactor Atmospheres at Pedricktown Date 12-14-70 At your request I visited the Pedricktown plant on November 18 and 19* 1970 to supervise analyses of reactor atmospheres. The chromatograph used for the analyses was an F&M Model 700 located in the plant Quality Control Laboratory. The calibration standards containing 97 ppm of vinyl chloride were taken from the cylinder at the Development Center on the morning of November 18 and analysed a few hours later at the Pedricktown plant in the afternoon. Reproducibility of GC peak heights for six calibra tion standards was very good. All analyses were made by D.P. O'Keefe. Samples were taken by various operators under the supervision of R.W. Modrell. All samples were analysed within a few minutes after being taken. Quantitative results are tabulated on page 2. To my knowledge* this is the first time atmospheres of a PSG type reactor have been analysed. In this type of reactor* the final dry* powdery polymer is removed from the reactor by a stream of air. This should at the same time serve to purge the reactor atmosphere to lower levels of vinyl chloride vapors than usually found in our other type reactors. However* this may not necessarily be true. The atmosphere of PSG Reactor $83 was analysed on two successive days. As shown by the data* the vinyl chloride content was much higher the first day than the second. More sampling and analyses should be made to obtain more positive results. Another observation is that the vinyl chloride level in Reactor #83 did not increase after the cleaning procedure had begun. Past experience with our usual reactor has shown that the vinyl chloride level increases as the surface layers of buildup are brijeb awat* The buildup material in the PSG reactors evidently does not trap vinyl chloride. Probably because the reactor is charged with partially polymerized material from a pre-poly. rym cc: R. J. Wolf A. R. Weber J. A. Klupar R. W. Modrell C. H. Lufter L. B. Crider D . E . Wright D. P. O'Keefe E. Noble Tech. Council C . T. F. File (3) BFG-1 4 3 * A E. G. DeCapita <r. rGoO BFG46720 -2 Time Sampled FSG Reactor #83; 11-19-70 30' after opening 30' after opening 15' after entering 15' after entering PSG Pre-poly; 11-19-70 4 hours after evacuation 4 hours after evacuation PSG Reactor #81*; 11-19-70 When reactor WERT opened When reactor was opened 25' after opening 25' after opening Location in Reactor Near manhole Middle of reactor Near manhole Middle Above manhole Below manhole Lower outlet Lower outlet Near manhole Middle PPM 222 188 755 181 11 12 108 98 8 15 *Resin transfer lasted several hours more than normal due to clogged outlet. PSG Reactor #83; 11-20-70 When opened When opened 30' after opening 301 after opening 30' after entering 30' after entering 60* after entering 60' after entering Lower outlet Near manhole Near manhole Middle Near manhole Middle Near manhole Middle 755 46 15 28 10 27 15 21 BFG46721