Roberts, L. B.

English

UARK (University of Arkansas )

Journal of the Arkansas Academy of Science Volume 1 Article 21 1941 Automatic Still from Stock Glassware L. B. Roberts University of Arkansas at Monticello Follow this and additional works at: https://scholarworks.uark.edu/jaas  Part of the Water Resource Management Commons Recommended Citation Roberts, L. B. (1941) "Automatic Still from Stock Glassware," Journal of the Arkansas Academy of Science: Vol. 1 , Article 21. Available at: https://scholarworks.uark.edu/jaas/vol1/iss1/21 This article is available for use under the Creative Commons license: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0). Users are able to read, download, copy, print, distribute, search, link to the full texts of these articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author. This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Journal of the Arkansas Academy of Science by an authorized editor of ScholarWorks@UARK. For more information, please contact scholar@uark.edu. I69AN AUTOMATIC STILL FROM STOCK GLASSWAREL. B. Roberts, Arkansas Agricultural and Mechanical College,MonticelloThe author wishes to pass on to others any Ideas they mayfind useful of those developed in constructing an automatic waterstill from material at hand.After some preliminary experience with a still of about onequart per hour capacity using a gas-heated hypsometer from thephysics equipment as the. boiler, an electrically heated still ofsome two liters per hour capacity was set up. Aninverted 5-11terpyrex balloon flask serves as the boiler. A water inlet, anoverflow, a drain, a steam delivery tube, and two electricalwires pass through the rubber stopper.The water inlet delivers hot water from the condensersystem into a Jacket around the constant level overflow tube,from which water needed to replace evaporation and "bleedingflows out into the boiler proper. The excess overflows into aleaking can which carries a float. The float in turn carriesmercury Into which two wires dip and close the circuit when thecan Is full. Iffor any reason the water supply should fail,the leaking of the can willallow the float to fall and shut offthe power from the boiler.A Woulfe bottle several feet above the boiler and furnishedwith a constant level overflow supplies water at a constantpressure. The water passes in series through three condensersand then to the boiler. The first of the condensers (the lastreached by the distillate) serves only to cool the distilledwater after condensation In the other two, and before droppingInto the carboy that is used for a reservoir.To prevent the accumulation of a high concentration ofsolids in the boiler water, a small "bleeder" tube is providedwhich allows water to drip through a Jet at a rate about halfthat of the distillate. This serves also as a drain for theboiler after the operation is suspended.The heating element in the boiler consists of a coil of barechromel wire—about one third of a hot-plate replacement coll—supported out of contact with the walls of the boiler flask,and completely immersed when in operation. Its power consumptionis about 1500 watts.With internal heating the glass (pyrex) walls of the boilerhave proved to be sufficient Insulation, so "it is possible toleave the interior of the boiler exposed to full view, makingInspection easy at all times.(This is a condensation of the paper presented at the 1941 meeting)70Journal of the Arkansas Academy of Science, Vol. 1 [1941], Art. 21Published by Arkansas Academy of Science, 194171Journal of the Arkansas Academy of Science, Vol. 1 [1941], Art. 21https://scholarworks.uark.edu/jaas/vol1/iss1/21

Automatic Still from Stock Glassware

ScholarWorks@UARK

Journal of the Arkansas Academy of ScienceVolume 1 Article 211941Automatic Still from Stock GlasswareL. B. RobertsUniversity of Arkansas at MonticelloFollow this and additional works at: http://scholarworks.uark.edu/jaasPart of the Water Resource Management CommonsThis article is available for use under the Creative Commons license: Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0). Users are able toread, download, copy, print, distribute, search, link to the full texts of these articles, or use them for any other lawful purpose, without asking priorpermission from the publisher or the author.This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Journal of the Arkansas Academyof Science by an authorized editor of ScholarWorks@UARK. For more information, please contact scholar@uark.edu, ccmiddle@uark.edu.Recommended CitationRoberts, L. B. (1941) "Automatic Still from Stock Glassware," Journal of the Arkansas Academy of Science: Vol. 1 , Article 21.Available at: http://scholarworks.uark.edu/jaas/vol1/iss1/21I69AN AUTOMATIC STILL FROM STOCK GLASSWAREL. B. Roberts, Arkansas Agricultural and Mechanical College,MonticelloThe author wishes to pass on to others any Ideas they mayfind useful of those developed in constructing an automatic waterstill from material at hand.After some preliminary experience with a still of about onequart per hour capacity using a gas-heated hypsometer from thephysics equipment as the. boiler, an electrically heated still ofsome two liters per hour capacity was set up. Aninverted 5-11terpyrex balloon flask serves as the boiler. A water inlet, anoverflow, a drain, a steam delivery tube, and two electricalwires pass through the rubber stopper.The water inlet delivers hot water from the condensersystem into a Jacket around the constant level overflow tube,from which water needed to replace evaporation and "bleedingflows out into the boiler proper. The excess overflows into aleaking can which carries a float. The float in turn carriesmercury Into which two wires dip and close the circuit when thecan Is full. Iffor any reason the water supply should fail,the leaking of the can willallow the float to fall and shut offthe power from the boiler.A Woulfe bottle several feet above the boiler and furnishedwith a constant level overflow supplies water at a constantpressure. The water passes in series through three condensersand then to the boiler. The first of the condensers (the lastreached by the distillate) serves only to cool the distilledwater after condensation In the other two, and before droppingInto the carboy that is used for a reservoir.To prevent the accumulation of a high concentration ofsolids in the boiler water, a small "bleeder" tube is providedwhich allows water to drip through a Jet at a rate about halfthat of the distillate. This serves also as a drain for theboiler after the operation is suspended.The heating element in the boiler consists of a coil of barechromel wire—about one third of a hot-plate replacement coll—supported out of contact with the walls of the boiler flask,and completely immersed when in operation. Its power consumptionis about 1500 watts.With internal heating the glass (pyrex) walls of the boilerhave proved to be sufficient Insulation, so "it is possible toleave the interior of the boiler exposed to full view, makingInspection easy at all times.(This is a condensation of the paper presented at the 1941 meeting)70Journal of the Arkansas Academy of Science, Vol. 1 [1941], Art. 21Published by Arkansas Academy of Science, 194171Journal of the Arkansas Academy of Science, Vol. 1 [1941], Art. 21http://scholarworks.uark.edu/jaas/vol1/iss1/21

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Automatic Still from Stock Glassware

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