Document X7KZQN3LpnYq2ED28OYQKaYyx

' C O N F ID E N T IA L vv ' EVAPORATION OF LEAD ALKYLS -f f ' **'**3** r ,tt*, %?-i1*: />{T- >j~v 3 "'. ** '> T he stu d ies iu m m & rit d h e re w ir e intended to p ro v id e to m e in* . fo rm atio n about the le a d -in -a ir le v e ls th at re s u lt when TM L, TEL o r alkyl m ix tu re s a re handled in ty p ical m o to r gasolines , . . ' ' . ,s. ? , jl % , r -# . T ab le 1 su m m a rises the data obtained in se v e ra l se ts of experi* , - ,/.r d\.-' - ` ' '' m ent*. F ir s t a re shown "V apor over fuel" d ata w hich a re a co m p o site .' '' ' " " -v ~ of g lassw are and drum ex p erim en ts and show the co n cen tratio n s of F b tr ,; r'-Mr M a i, * 3 3m in the v ap o rs above g aso lin e under eq u ilib riu m conditions. T h ese v alu es a re re p re se n ta tiv e of those th at w ould be obtained in the v a p o rs d isp la c e d a s a p a rtia lly filled tank o r drum w as re fille d . A I N iodine solution w as -h u s e d to t r a p th e le a d a lk y l v a p o r s in tv " l e a d - i n - a i r ' b u b b le r a n d th e le a d was d e te rm in e d by the di'thiaone m eth o d . It can be noted th a t th e re la tiv e lead co n cen tratio n s w ere rougidy p ro p o rtio n al to vapor p re s s u re s . A single o b serv atio n at San B ern ard in o of the lead in the v ap o r in a c a r tank co n firm s the T E L values obtained a t D etro it v e ry w ell. M easurem ents m ade of lead in a ir during autom obile refueling a rc shown under "G arage S am pling." D etro it and San B ern ard in o lo catio n s a re shown along w ith the g e n eral conditions p rev ailin g at the tim e the sam pling w as done. The num ber of c a rs refu eled w hile each sam ple w as taken is shown by the num bers in p a re n th e sis. It w ill be o b serv ed th at the ab so lu te v alu es fo r T E L c o v e r a wide ran g e a s does the ra tio of lead fro m TM L to lead fro m T E L . T h is v a ria b ility sim p ly em p h asises the fact that a la rg e num ber of o b serv atio n s during vehicle HE 0020788 / refueling would be re q u ire d to si& biish the tru e le v e ls of le a d - in - a ir 1 fu n c tio n o i le a d a lk y l v o l a t i l i t y , T h e r e is n o re& eo n to b e lie v e 1 tb a i .he r a t i o s shown by th e g l a s s w a r e a n d d r u m e x p e r i m e n t s a re no: appr 3j;in~ately c o r r e c t. ' . - ; . j. ' \.y , _ '?.r : HJG/.11 1/15/59 - v;; v - , ^ j 2j... J'/m '/ 1 ^ .../:- ' 5..../... - . .. r;v->> J. ;; . '. * ' - "I? ' - /,'A /.' . 002078 fl .. - . .......... " 1 j4 ' i ,V ;,' . *, <' ' i ,, '' `- T l f 7 7 ^ 7 r 7 >, '> j, t^ 4 " E V A P O R A T IO N O F T E L , T M L , A N D M IX T U R E S O F T H E M E T H Y L -E T H Y L A L K / ''" , 7 ' sVvti`//ti* 1' }l 7S'*`> ,, , `* u * ^v' * '' ~ , , ` V XV-7 L ead-in-A ir, m icro g /C u .M .: R atio C one. C one, to TE L V apor over fool ,. (G lassw are k D rum E xpts. c a rrie d out in D etroit at 6 5 -7 5 F ) 2,200 7,090 9 .2 C ar Tank V apor: Saa B ernardino - Fool T e m p . 8 8 * F : . ;''' I " 7 O arage Sam pling: 1* o u t a a d l* u p f r o m f i l l e r pipe opening D etroit 70*F inside and out side. D oors closed, a ir q u ie t. 2 ,5 0 0 i (196(6)* (170(6) * D etroit 25-35*F outside, ?Q*F in sid e , c a re cold, apace b e a te rs running 55(10) i S a a B e r n a r d in o 80 F in. a n d 3 5 (3 ) out, doors closed, quiet a ir R atio ' R atio C one, to TE L C one, to TE 19,500 8 .9 32,000 14^5 m' '' . m - ' : .m (367(4) 6 .7 (441(4) 8.0 mm ' i / '. 4^!* %)r ( tty / _ i a < ft# % - - * ' ' . -' ;: fa t l* oat and 2* up (torn fille r 1 ^ 3 ; '' P ip o p # in f '' "' P e lr o it 70 *F inside and out- side* Doors closed* air quiet* TSL Cone* 120 lV out and 1* below f ille r pipe 4 $ *t\" opening %i, D etroit 70 *F in sid e and out* ' "-s^side* P o o rs ' *closed* air * quiet* t Av 4 dr/ iJf T* f ' San Bernardino 80*F in and ;$'9utl i:dd02' d osed * quiet air* X . I v*: 'i: Car tank vapori - : _r , kSan B em ard ioo :fuel tem p era- 590 425 2500 K. , v. ? vrV ' ` -7 . % , ^ ft a number of cars averaged M A-250 M A -50 J Z MA-750 TUL B ati C o se , to TJL `M 5,200 43.3 **"4 . C5 ro CM UL H. J. Gibaos l / l i / 5 9 ?l*:- LT/l 5 / 5