1376
INDUSTRIAL AND ENGINEERING CHEMISTRY
Vol. 33, No. 11
Summary
Acknowledgment
Sulfur compounds in five different states of oxidation were investigated t o determine their effect upon the rate of hydrogenation of phenol, naphthalene, and quinoline with Raney nickel catalyst. The degree of poisoning depended upon the degree of oxidation of the sulfur compound and also upon the material being hydrogenated. I n the hydrogenation of phenol the catalyst was poisoned partially by diphenyl sulfone and completely by diphenyl sulfoxide, diphenyl sulfide, and thiophenol. Naphthalene was poisoned partially by diphenyl sulfone and sodium benzene sulfonate, and completely by diphenyl sulfoxide, diphenyl sulfide, and thiophenol. Quinoline was partially poisoned by methyl-p-toluene sulfonate, sodium benzene d f o n a t e , diphenyl sulfone, diphenyl sulfoxide, diphenyl sulfide, and thiophenol. This poisoning was one of degree only; methyl-p-toluene sulfonate gave the mildest poisoning and thiophenol the strongest poisoning.
The authors \%,ishto extend their thanks and appreciation t o James A. Anderson for checking many of the data reported.
Literature Cited Adkins, J. Am. Chem. SOC.,54,4116-17 (1932). Ellis and Wells, IXD.ENC.CHEM.,8, 886 (1916). Kelber, Ber., 49, 1868 (1916). Kubota and Yoshikawa, Sci. Paper Chem. Research (Tokyo), 3,33 (1925). Maxted and Evans, J . Chem. Soc., 1937, 603-6. Moore, Richter, and Van Arsdel, 3. IND.EXG. CHEM.,9, 451 (1917). Schwab'and Brennecke, Z . Physik. Chem., B24, 393-406 (1934). Ueno, J . Chem. Ind. (Japan), 21, 898-939 (1918); 23, 845, 911 (1920). Yoshikawa, Bull. Inst. Phys. Chem. Research (Tokyo), 14,308-12 (1935).
Nomograph for the Solubility of Sulfur Dioxide in Water-Correction
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AM greatly indebted to George E. Sco-
field for calling attention to a serious error in the line coordinate chart which appeared in June, 1941 (page 730). It should not be used except for concentrations, 8, very near those of Beuschlein and Simenson's original investigation (0.51, 1.09, 4.36, and 7.45 grams of sulfur dioxide per 100 grams of water); and the maximum error in partial pressure as read from the chart at 30' C. is 19 per cent a t S = 2.5. The accompanying line coordinate chart, designed to replace the earlier effort, reflects the original data faithfully over the entire ranges of concentration and temperature. Agreement is exact a t the above mentioned concentrations, and elsewhere the new chart usually yields values between the Beuschlein and Simenson data and those of the International Critical Tables [Volume 111, page 302 (1928)j with which the Beuschlein and Simenson data are in excellent agreement throughout. Three temperature scales, to be used in three ranges of concentration, appear on the new chart. The dashed index line shows that a solution testing 2.5 grams of sulfur dioxide per 100 grams of water has a partial pressure of sulfur dioxide of 428 mm. mercury a t 50' C. (Beuschlein and Simenson, 437; International Critical Tables, 421); the dotted temperature scale is used since it is designated as the proper scale for concentrations embracing S = 2.5. In the converse use of the chart, to find aconcentration corresponding to a given temperature and a given partial pressure, the proper temperature scale is the one that will yield a concentration in the range for which the temperature scale is marked. D. S.DAVIS
