โ Scribed by Hickman, K.
No coin nor oath required. For personal study only.
To aid thc distillation undcr rctluccd prcssurc of unstalJlc orgauic liquids it is customnry to draw air or other gas tlirough tlic nppnintus. This prevents bunipiiig nnd increases tlic yield of distillnte by rcducing tho partial prcssurc. l'lierc are, hoircvcr, sonic liquids so difficult to hnndlc tlint the admission of I 7' ir causes oxidation or else rniscs tlic boiling point until dccomposition occurs.
Such difliculties wcrc felt nciitcly ~r l ~c n trying to distill certain high boiling liquids wliicli hnvc been found uscfiil i n lubricnting the nicrcury meniscus ngainst the glass of in:inoinctcr end bnroinctcr tubes nntl other vncuuin appnrntus.1 ilmong otlicr conipounds, h ~t , y l ~) I ~t l ~~l i ~t ~, butyl stcrirate, and lllctllvl &atc hnrc IJCCII found csccllcnt in this rcspcct, hit only d i c n pure. Orcliiinry vncuuin distillation with nn air stream yields distilltitcs sufficicntly ticid to nttack mercury on long stantling. A diffcrciit nict liocl Iind thcrcforc to IIC dcvised.
I h is wcll known that distillation will t:iI;c plnce riipidly undcr cstreincly low pressures if the cvaporating
๐ SIMILAR VOLUMES
## Abstract Highโboiling coal liquids from the solventโrefined coalโI and โII (SRCโI, โII) processes, respectively, were fractionally distilled. In the case of SRCโI process solvent (PS), 50ยฐF distillation cuts were obtained between 550 and 850ยฐF, while for the SRCโII material, the 50ยฐF cuts were o
Liquid n-butane'has b&n sim&tcd,,n&r its doiling point by thi: keiho~ of rnolec&r dynamics.'The computed'~~~dgfusion caefficicnt D is npp~oximrttei~ equal.to 6.0 X 1C? cm2!s; fhe correspnndin~ vet&if auto~orrei$ion function ,. displays practical& no c&2 ef&ct, diffking martie& Born argon and other s
## Abstract A boilingโpoint apparatus is described and an account is given of its use for determining the boilingโpoints at reduced pressures ofโ various liquids of low vapour pressure. The theoretical relationship between temperature and vapour pressure is discussed and the vapour pressures of var