Reference

The relation between the kinetics of the generation of protective layers and the load-carrying ability of alloyed mineral oils in the four-ball-apparatus

The relation between the kinetics of the generation of protective layers and the load-carrying ability of alloyed mineral oils in the four-ball-apparatus. Buechner, R.; Weber, K. (Direktionsber. Forsch., VEB Petrolchem. Komb. Schwedt, Schwedt, E. Ger.). Schmierungstechnik, 8(3), 89-92 (German) 1977. CODEN: SHRGAC. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) An 0.12 M soln. of 35S-labeled dibutyl xanthogen disulfide [105-77-1] in lubricating oil forms a 1.3 mg/cm2 layer of FeS on the steel balls of the testing app. after 60 s at 2200 N load, and prevents wear at loads .ltoreq.2200 N. The surface concn. of FeS is proportional to the square root of time up to 60 s. The thickness of the FeS must be >0.36 .mu. to prevent adhesion of the steel balls at <2000 N. The topog. of the steel surface and the FeS layer were examd. by electron microscopy and autoradiog., resp.

Effect of simultaneous ultrasonic and electrochemical treatment of a xanthate solution on its composition and technical properties

Effect of simultaneous ultrasonic and electrochemical treatment of a xanthate solution on its composition and technical properties. Zholshibekova, M. R.; Dmitrieva, I. L.; Chanturiya, V. A.; Malakhov, Yu. V. (USSR). Vestn. Akad. Nauk Kaz. SSR, (9), 47-52 (Russian) 1984. CODEN: VANKAM. ISSN: 0002-3213. DOCUMENT TYPE: Journal CA Section: 54 (Extractive Metallurgy) The effect of simultaneous ultrasound and electrochem. treatment (SUET) of 1-5% K butylxanthate [871-58-9](I) solns. on their compn. and flotation activity was studied. Bu-monothiocarbonate disulfide (BuO2C)2S2 (II) [105-77-1] and bis(butylxanthogen) (III) [105-77-1] were identified by thin-layer chromatog. as the main I oxidn. products formed during SUET. The recovery of sphalerite [12169-28-7] in the flotation conc. was increased by the formation of II, and the recovery of galena [12179-39-4] and chalcopyrite [1308-56-1] by the formation of III.