Document 4a5XrK0qZvGYBkBQ6QXjZ3G1N

FILE NAME: Chemical Abstracts (CHAB) DATE: 1940 DOC#: CHAB020 DOCUMENT DESCRIPTION: Abstract Originally Published in 1940 by Kalden H 9 4 ' M ' t i y CHEMICAL ABSTRACTS Vol. 34 SEPTEMBER 20, 1940 No. 18 1--APPARATUS, PLANT EQUIPMENT AND UNIT OPERATIONS W. L. BADGER Microporous ebonite as &filtration medium. Evilovu. fully applied in factory control of the quality of ultra 4 Byull. Obmen Opyt. Lakokrasochnoi Prom. 1939, No. 6-7, marine. Six curves are given. David Aelony 28.--Pure distd. water stops filtering through microporous An Investigation of the comparative solubilities of typi ebonite. This is not due to swelling of ebonite b u t to cal add-resisting materials in adds of various concentra electrically charging of water by the ebonite. D. A. tions. L. N . Muraviev. Trudy Inst. Ogneuporov 1937, Electrostatic dust sampler as used in sampling lead No. 18, 82-96; Khim. Referat. Zhur. 1938, No. 6, 117-18. fumes. Edgar C. Barnes. Penna. Dept. Labor and Ind., --Beshtaunite (SiOt 71%, A1,0,18% and F e ,0 ,2% ), add- Safe Practice Bull. No. 57, 8 pp.(1939).--A portable elec resistant bricks (SiO, 59%, Al>, 28% and Fe^3, approx. trostatic dust sampler is described. The pptn. unit con 8%) and add-resistant thin ceramic material (SiO, 58%, sists of cylindrical A1 electrodes. The power supply con A1,0, 33% and Fe,0, 2%) were examd. The samples sists of an ignition coil, high-voltage rectifier tube, and were powdered, and 10-g. lots were treated for 10 days condenser furnishing about 10,000 v. An efficiency of 99% with 100 cc. of H,SO< (d. 1.84), HC1 (d. 1.19), HNO, (d. is claimed. Earl H. Brown 1.40), 60% AcOH and 5 AT, A and 0.1 N solns. of these Investigations with the super [electron] microscope. aTdhdes inasnodl. irnessiodluness. wofertearftialrteicredadodff,ofwtahsehesda,mdericeodncannsd. sHtr.ucKtiaolndeonf. thCe heelmec.-tZrolgn. m6i4c,ros1c2o9p--e33i(s1d9e4s0c)r.--ibeTdheandcoinj- heated to const, wt. The treatm ent of each sample was lustrated and the technique of prepg. and observing speci repeated 4 times, and the soly. detd. from the total loss of wt. A preliminary roasting lowered considerably the mens is presented. Photographs are reproduced of col loidal Au, various bacteria, tobacco mosaic virus, potato soly. of the substances in adds. The soly. of the acidreSistant brick was 2 to 7.9% in the various adds, th at of X virus and PbO smoke; also of asbestos and Thomas beshtaunite 1.7-6.16%, th at of the thin ceramic material meal with respect to their role in producing silicosis. T. H. Dunkelberger 0.94-2.80%. In general the a d d resistance increased A gas-detection apparatus for qualitative microcheriis- with the increase of the A10, content and with the de crease of the contents of Fe,0<, CaO and MgO. try, C. L. Wilson. Analyst 65, 407-8(1940).--The re W. R. Henn action vessel is a micro test tube connected to the testing A new design of combustion-boat tongs. H . F. Priest. chamber by a suitable glass arm. Cotton wool or glass Ind. Eng. Chem,, Anal. Ed. 12, 473(1940). G. G. wool is placed in this arm to retain spray before the evolved Power, capacity and efficiency of pumps. W. F. Schap- gas enters the testing chamber which is a piece of straight borst. News Ed. (Am. Chem. Soc.) 18, 658(1940).--A glass tubing. Inside this is a series of glass rings which nomographic chart is given by which the relationships of just slide into the tubing and serve for holding the various horsepower, gal./min., head-feet, and pump effidency (in test papers. The procedure is illustrated by the detn. of percentage) are detd. easily. W. C. Ebaugh AsH, in the presence of HS. The latter is removed first by passing the gas through the requisite no. of papers A new regeneration process for absorption cooling plants. I. Badylkes. Kholodil'naya Prom. 16, No. 1, impregnated with Pb(OAC), as detd. by expt. A subse 13-16(1938); Chem. Zentr. 1938, II, 3844.--An arrange quent disk is impregnated with AgNO, + HNO, to serve ment is described in which regeneration takes place in the for detecting AsH, after the H,S has been removed. ' : .- ' W. T. H. generator. The lower part of the app. is in the form of a The photoelectric automatic analyzer. V. A. Mikhailov. bundle of tubes. The NH,-rich soln. flows in a thin layer over these tubes; the vapor arising passes to a heat ex Avtomalika i Telemekhanika 1937, No. 3, 7-40; Khim. changer. The economic advantages of the arrangement Referat. Zhur. 1938, No. 6, 116.--The app. described can are discussed. M. G. Moore be applied to automatic measurement of turbidity, color or Graphical determination of heat-transfer coeffldents residual Cl in water, to the automatic control of N oxides for tube bundles. Josef B6hm. Wirme 62, 425-31 that absorb light in the visible region, to the automatic (1939); Science Abstracts B, 42, No. 501, 449; cf. C. A . control of H-ion concn. (by use of colored indicators), and 34,4*.--After a short description of the use of the prindple to the detn. of transparency in gaseous and liquid media. of similitude for the detn. of heat-transfer coeffs., equa The app. possesses a stable photometric accuracy of meas tions are derived for tube bundles subjected to either trans urement of * 1-2%, which is not affected by the aging of verse or parallel fluid flow. The heat-transfer coeffs. are the photoelements or by variations of c. d. The measure represented in terms of the customary dimensionless groups ments are entirely automatic. W. R. Henn of variables Nu, Pe and Re, and nomograms are repro Apparatus for rapid determinations of arsenic in the duced which enable solns. to be read off for various par presence of antimony. Valerije Biskupski. Bull. soc. ticular cases. Their use is illustrated by means of ex chim.roy. Yougoslav. 10, 75-9(in German, 79-80)(1939). amples. C. L. B. f --A aistn. app. is described permitting quant, sepn. of New thermoelectric pyrometers. B. Kinkulkin. Stal AsCl, from SbCl, in the Fischer method \Z. anal. chem. 8, No. 6,15-19(1938); Chem. Zentr. 1938, H, 3954.--The 21, (1882)) of detn. of As and Sb by distg. between 70 and 1most satisfactory combinations were found to be C*-W 100. HC1 is circulated through the app. at a const, rate and C'-M o. The C 1and C* designate C electrodes prepd. to facilitate the distn., promote formation of As+++ and in a particular manner. A1,0, proved to be best for insu absorption of the gases. J . G. Tolpin lating the thermoelements. Temps, up to 1660 can be L. I. Denikina's tricolor colorimeter in ultramarine measured and 5-6 mescurements can be made before the r color determinations. S. G. Evsiovich. Byull. Obmen elements must be discarded. P t thermoelements can be Opyt. Lakokrasochnoi Prom. 1939, No. 6-7, 22.--Dem- replaced by the combination Mo-stellite for measurements kma's tricolor colorimeter (cf. C. A . 32, 1061`; Russ, up to 1200. M. G. Moore pats. 20,361 and 20,094, C. A . 26, 5456) can be success- Temperature measurement with blocking-layer photo- 6137 6138