Document pm479ZQEO4dvbJej5rVrLGYRj

Br* Graham Edgar Page 2 On the subject of the material which cl1tors the standpip and the stirrer assembly* this sets''In'every-respect pretty rasoh like straight triethyl lead bromide* To destroy, that efficient ly with hleaching pomisr would man probably filling up the tank to the top# This does not sees,very practical ted ay suggestion would be to build a small tank wide enough to take the stirrer oosenbly end 8a.de?>as the eight-tank* This could then be filled up !:h a suitable resgsnt for either or both dissolution and the de struction of fee organic lead compound* e are searching.,,for such- reagents at present, using a new sample of this material vctieh we have Just received* 'CsAfiM . cc* MDfirr*r*..-t!i'f..*FM**l.&Wieohnalelatner Very truly youre /y George Cnlinpaert August 25* 1934* Or f r a h ss iSdgsr Doer Or* ndger* Til foilonda is s Progress Report on the problem of cleaning the sludge fst m ISthyl Fluid -"eight Tanks*- The mud wuioh settles down woen the sludge is allowsd-inr-draia-ia roughly 60.> b y / voluta o f t he o r i g i n a l sludge `Rila nud i t s e l f i s ?0;C s o l i d s %ich analyses as folleost fepOs 3GP 27.0 .`lilies* etc. 1*3 ' 'The belenes is* of course* '-ahetever is conbined with tho load* es well ss sac organic matter Aenzene .extracts 42*5$ by weight of tho s t o w material* and this cantaIns'13*&;' Ah out of vthc original 2703Ae As you crow triethyl lead rooidc when subjected to steam distillation decompose apparently to the formula SPbEtgBr * Pollfg 3%* T>.i/neaaa that steam distillation yields an ssK>unt of load in the distillate which is'half of the initial lead On t'-is basis the 13*3$. of lied extracted wfih. bensene would be expected to- give 9*4$ of sterna distilled lead* .Actual test g e w recovery of 12 grams* a reasonable chedk'^nsidering .how little we mow regarding the identity of the compotiaijsh-pres'ent* . " ' Several batches of the Mssod* "are then treated fot* various lengths of tiza# with bleaching ponder with or without, acid* alkali <a* heat* The aoid bleach destroyed only <>0# o* the oanle lead (a measured by steam distillation) while ell the other testa gave very good results* The beat result to date was-obtain! with bleach -ItPout acid or alkali* after standing for 20 honra '"'h e 'distillable lead was then down to 0*2$* These results are now being check by steam distillation end siso by extraction with benzene v?e aro siso attempting to improve further upon those *%gures by increasing the time of content* the mount of bleaching powder* and by beet* .