230
JOURNAL OF CHEMICAL EOUCATIO,'
may be oxidized with sodium chlorate. The tungsten may either be recovered by crystallization or precipitated as calcium tungstate upon addition of calcium hydroxide. Electrolytic Production of Alloys. No. 2,341,244. W. W. Shropshire and A. L. Frohman, assignors to International Smelting and Refining Company, New York City. Lead containing small amounts of higher-melting metals has many commercial applications. The patent describes an electrolytic method of alloying metals such as copper and molten lead. The method is described with the aid of'the accompanying figure, in which 8 is a heated iron pot containing molten lead, 3,
copper anode. The chlorine is not lost as a gas but a continuously to regenerate the electrolyte. The copper ions become uniformly dispersed throughout the lead The process is claimed to be an improvement over prior methods of melting the two metals together or tht addition of salts to the molten lead. The presenl method is further stated to be applicable to manl metals other than copper.
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Insoluble Polymers Derived from Styrene. N. 2,341,175. Edgar C. Britton, et al., assignors to till Dow Chemical Company. This invention relates to new types of copolymen derived from styrene. Because of their characteristX appearance and feel these substances have becom~ known as the "popcorn" polymers. In fonning the new polymers. styrene is polymerizet with minor proportions of substances which may b divided into three groups: 1.
2. 3. FIGURE 2
and 1 is a copper anode suspended about 1 inch above the level of the molten lead and surrounded by an electrolyte. fused lead chloride, which may contain some alkali metal or alkaline earth or other metal chlorides which both lower the melting point of the lead cWoride and increase its electrical conductivity. The confining cylinder. 6, is of metal lined with refractory concrete. Cathode connections are at 4 and 5, the real cathode being the molten lead, 3. The lead is stirred from time to time by stirrer, 7. At the anode, copper ions are fonned which react with chloride ions from the fused electrolyte to form cuprous chloride. The cuprous chloride dissociates immediately.to form copper ions which migrate to the lead cathode, and chloride ions which migrate to the
Neutral unsaturated. acid esters of unsaturatel" alcohols, e. g., allyl cinnamate. Neutral saturated polycarboxylic esters of WI saturated alcohols, e. g., diallyl oxalate. Neutral esters of unsaturated acids with poly hydric alcohols, e. g., ethylene dicrotonate.
Sixteen examples of preparation are given in th patent, one of which follo,vs: One hundred parts of stryene and 20 parts of aliI cinnamate were polymerized by heating at 70 to 80'0 for six days. The completely polymerized product WI a fluffy, white mass having a small amount of a glasslill resin interspersed throughout. The two types of pol, mer were separated by being passed through a sienThis may be done because'the opaque white materiali readily crushed to a fine powder. The powder was in soluble and nonswelling in acetone, alcohol, benzene toluene, dioxane, carbon tetrachloride, etc. These new polymers are stated to have excellenl molding properties. When molded they become clear transparent, and glasslike with higher strength an: better resistance to\vard distortion by heat than moldei polystyrene.
POSTWAn JOBS IN ELEcrnoNIcs Students, teachers, librarians, counselors, parents, war workers, returning soldiers, and others interested in postwar jobs will find helpful information in a six·pagefolder on HOccupations in Electronics" by Forrest H. Kirkpatrick of Bethany College, and John E. Crawford of the Radio Corporation of America, plLblished by Occupational In(lex, Inc., at New }'ork University, New York 3, N. Y. Single copies are 25 cents, cash Idth order. This i,s one of a new series of lcnflets describing opportu,nities in. ficlds which are expect.ed to expand when the UXlr ends. Each covers the nature of the work, abilitics find training required, earnings, ,nethods of entrance and advancen'tent, geographical ~/i."'tribu tion of employluent, postwar /Jrospects, undother advantuges and disadvantuge.'l.
