I/EC
AN ENVIABLE RECORD OF SERVICE TO CPI From its major facilities in Santa Rosa, California and West Chester, Pennsylvania — and its field engineering and service offices in Chicago, Houston, Seattle and Los Angeles—Rietz has supplied size reduction and heat exchange equipment to
MORE THAN 50 OF THE LARGEST CHEMICAL COMPANIES IN THE WORLD An example
RIETZ
DISINTEGRATORS
TYPICAL APPLICATIONS Dry pulverizing — coarse or fine. Wet grinding of solids to produce slurries or pastes. Fine dispersion and homogenizing. Dissolving of solids in liquids. Intimate mixing of pastes, slurries and powders. SPECIAL FEATURES AND ADVANTAGES Can be supplied for operating under atmospheric pressure, vacuum or internal pressure. 360° screen area insures maximum capacity, uniformity of grind and minimum temperature rise of product. Optional secondary discharge for continuous separation of disintegration-resistant material. Rugged, compact construction in carbon or stainless steel in vertical design (as illustrated), or in angle or inverted models.
Rietz DISINTEGRATORS
MANUFACTURING CO. Santa Rosa, Calif. · West Chester, Penna. PREBREAKERS · EXTRUCTORS · THERMASCREWS
REPORTS
white photographs, but the char acteristic pattern is evident.) Drs. Kepner and Webb have suggested that a simplified version of the technique they used (which gave semiquantitative data) would be entirely adequate for establishing the fact that a given grape is of the Pinot type. The procedure would be some thing like this. Grape skins are re moved, washed, and then ground in a mortar with washed sand and a small volume of methanol containing 2 % hydrochloric acid. A small quantity of clear extract is then applied to a sheet of chromatographic paper and the chromatogram is de veloped by the ascending technique using η-butyl alcohol-acetic acidwater as a solvent. Comparison with a permanent standard should then be sufficient to establish whether the sample is Pinot Noir or not. Chromatography of the skin pig ments might also permit distinction between wines made entirely from Pinot Noir grapes and those in which the Pinot Noir has been blended with another variety. Not much Pinot Noir is grown in California, but there is a substantial market at good prices for Pinot Noir wines. As the regula tions require only that a wine must be made from 5 1 % of a grape variety to be labeled with a varietal name, there is considerable incentive to extend the amount of Pinot Noir wine by blending. R.G.N.
Chemicals to Cure Your Ills ^ \ M O N G the latest barrage of new drugs and new drug claims a r e : Paremycin fan opiate-antibiotic com bination) to alleviate gastric pain in children, and vanillic diethylamide to treat barbiturate poisoning. A Seattle pediatrician, Dr. Alvin Schneider, reports that Paremycin is safe and effective against diarrhea and has a direct tranquilizing effect on the intestinal tract. At the same time, he points out, the new drug has a wide activity range against bacteria that infect the intestines. Vanillic diethylamide, [a. {Continued on page 37 A)
Circie No. 72 on Readers' Service Card
34 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
