Document peRXoDa2G8nxBX3JxMVpQ48ok

Itfo E* fox - May 17. 1976 . yim chlohioc in hcl t V, C* Fuller R. L. Marsh 4*7*7/***? *rzjr> J. A. Class E, Mt Jonas Ai. R. Johnson J* L* Rasmussen ft* L. Stacy b R* Visa ?. A tf j It has coma to my attention that the purchased anhydrous HC1 used In styrana and lactic acid production contains M2--Ml0 ppm vinyl chlorlda. Stnca vinyl chloride Is now on 1st of cancar suspact agents and Is covered by an Individual substance standard, It behoves us to determine the final disposition of the material In our process operations* I feel that It Is particularly Important that we be abta to prove that personnel exposures are bclcw the permissible limits and that no vinyl chloride ends up In our food grade materials. In talking with PT personnel closely associated with the two units. It Is believed very highly unlikely that vinyl chloride eould survive the processes and reach the final products or be vented to flare or atmosphere* In styrene, the vinyl chloride Is more highly reactive than ethylene so It should not get through the alkylation step unvented. If any ended up In the ethylbenzene It would be expected to selectively react with the dehydro catalyst* The final disposition Is not Quite so clear cut In the lactic acid unit* It Is suggested that all atmospheric vents that could possibly vent vinyl chloride from the process should be checked* In addition, we should assure ourselves by analysis that the product streams are fr'ep of vinyl chloride* 9^r * John E* Fox flk ^ /t - *s AM. 1^*-* / KSV 0005529 r r I?