Document Yjenkoa6gNkvE6zDMj7Xwb61V

Et h y l Ga s o l i n e Co r p o r a t i o n C i i k m i c a i * H k s k a h c h T.a h o h a t o h y lO OO gS fijg} W k s t E i o i i t M i l k R o a d De t r o it , Mi c h ig a n December 14, 1940 Dr. Robert A. Kehoe College of Medicine University of Cincinnati Cincinnati, Ohio ', Dear Bob Please find herewith a copy of Dr. Beatty's memorandum dated December 13 covering the operation of the army gasoline stove. The two significant observations to date are s (a) One-third of the lead input goes off with the combustion products, some of it settling on the bottom of the heated kettle. (2) The trouble with gum in the heated tube, encountered by the Army, has not yet been observed. This coming week we shall experiment with the triple filter, and we are also expecting to hear from the Army about the gumming up. We shall be very glad, if you wish, to send Mr. Neal to Cincinnati to help your men familiarize themselves with the operation and idiosyncrasies of the equipment. G C jJH Enel. CC: Dr. Edgar Mr. Gay MEMORANDUM Test of U.S. A m y gasoline Stove December 13, 1940 A complete fire unit of a U.Sr Army gasoline Field flange, together with spare filters and oleaning tools, -was received through Mr. E. Gay, and has been Installed in an outside shed at the Chemical Laboratory. A aeries of five runs has been made by Mr. H. R, Neal on three different fuels* Red Crown Base, the S.O.IT.J. Fuel B (69$ olefine), and a 100$ Michigan cracked (3 years old, very high gum), each containing 3 cc. lead per gallon in 70-46 Fluid. From the viewpoint of lead removal and deposits, the prinoipal feature of the operation is that, after the flame has been started and maintained by hand for a time, it then heats a "generator" in which the fuel is fed under pressure, completely vaporised, partially cracked, and passed through a filter to remove the lead; from this generator, the fuel vapor goes to the "flame valve" where its rate of flow is controlled and it is mixed with air and fed to the burner proper. The operating instructions oall for replacement of the filter every four hours, and oleaning the connecting tube, flame valve, and burner surface with scraping tools and (if required) a gum solvent every 12 hours. Our tests were planned to determine* (1) The percentage of the lead input retained by the filter disc. (2) The looatian and amount of lead deposits elsewhere, and of gum. (3) The performance of the unit as a whole* (a) when cleaned as per instructions, and (b) Then allowed to operate without cleaning (except for change of filter eaoh 4 hrs.), until faulty operation occurred at some point. The results obtained may be summarised as follows* (1) Lead retained by filter. - About 70$ of the lead input is retained by the stovepraotioal'iy all in the filter and its oase. The data are* Run 2, 6.75 hrs., 1 filter used, about 68$ of the lead recovered, 6$ in 1he filter oase, 25$ in tiie outlet half side of the filter, and 37$ in the inlet half side; Run 3, 12 hrs., 3 filterdo used, 66$ of the lead recovered; Run 4, 15 hrs., 4 filters used,^ 77$ of the lead recovered; Run 5, analysis in progress^ Rk 0009521 2 (2) Other lead deposits. - In the flame valve jet, about 10 or 20 mg. lead is deposited every 4 hrs., and this is sufficient to require cleaning the valve about every 12 hra. On the tubing and burner surfaces, the lead deposited is small, readily removed, and not troublesome. On * the bottom of a kettle, containing warm water, whioh was plaoed direotly over the burner flame, lead was deposited at the rate of 50 mg, every 4 hrs. (2 Suns, whioh checked). Oum Deposits. * Very little gum, about 10 mg. every 4 hra., was depoeited in the comneoting tubing using the Red Crown or S.O.N.J, fuelsthe IflLohigan fuelwill show large deposits in tubes and flame valve (data not yet available), (5) TShen the filters are ohanged every 4 hrs. and the various pajrt:s are. oleanad |airery l2 hrs. following the specified procedures, there are no troubles resulting from lead or gum deposits,exoept that, first} the flame valve may require cleaning before 12 hrs,. espeoiallywithahigh-gum fuel, and second the openings into the filter caae may not be adequately oleaned by the specified prooedure (an ammoaium aoetate extraotlon of the case following the routine cleaning dissolved 546 mg. lead ) - Humorous mechanical difficulties were encountered whioh oould not be dLrectly asoribed to the deposits the most frequent were leaks at the filter case and the valves Summary, - She operation is reasonably satisfactory, except that only 70?& of the lead is retained; the change of filters and cleaning operations are not unduly difficult and give satisfactory results, but oannot be neglected without running Into trouble. It is planned to make a new case to hold 3 filters together, and test the lead removal. HABiJ H H. A. Beatty 12-15-40 K E 0009522