. Journal. perimentalsupport in the work of Dr. Masted on the Vol. XLI, Xo. 18] REVIEW 387 b action of sulphuretted hydrogen on pal-ladium.* This being so it would be expectedthat a catalyst with relatively large mass inproportion to its surfaco would hydrogenatooils containing small quantities of poisonsalmost independently of these poisons—that is,as shown by Dr. E. F. Armstrong, the velocity-tinie curve would bo a straight lino. I have hero some curves to show the resultsof hydrogenating oils by means of nickelwool which lend some support to this when we consider, for example in
. Journal. perimentalsupport in the work of Dr. Masted on the Vol. XLI, Xo. 18] REVIEW 387 b action of sulphuretted hydrogen on pal-ladium.* This being so it would be expectedthat a catalyst with relatively large mass inproportion to its surfaco would hydrogenatooils containing small quantities of poisonsalmost independently of these poisons—that is,as shown by Dr. E. F. Armstrong, the velocity-tinie curve would bo a straight lino. I have hero some curves to show the resultsof hydrogenating oils by means of nickelwool which lend some support to this when we consider, for example inthe case of Unseed oil, the different chemicalsubstances present — triglycerides of highlyunsaturated fatty acids with three doublelinkages, hydrogena ted down to olein and finallyto pure tristearin—the fact that no break isshown in the curve may mean that the physicalfactors of contact, etc., are overwhelming thechemical side of the reaction altogether. linseed OilSoya Bean 0QCotton Oil olive Oil ISO. ! . In conclusion, it is pleasant to think that theideal at which we should aim—namely, acontinuous process with a fixed catalyst capableof revivification in situ delivering oil withoutappreciable loss of catalyst—is really not outof sight. An added refinement is the possibilityof setting an indicator to deliver automaticallya continuous stream of oil of any desired degreeof hydrogenation ; that is to say, a self-operat-ing mechanical control to alter the conditionsnecessary to compensate variations in thespeed of the process. • Chem. Soc. T., 1919, 115, 1050. POST-WAR PROGRESS IN THEFIXATION OF NITROGEN* The Arc Process THE arc process of fixing atmosphericnitrogen was put into commereial opera-tion in Norway as long ago as 1004,andljas now reached an enormous development. Itwas pointed out in the Report of the NitrogenProducts Committee (c/. J., 1020, 25r) thatalthough the power requirements of the processare very large, it nevertheless affords the(hcapest known met
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
