Reference

Thermoplastic sheets or films for removal of toxic gases

Thermoplastic sheets or films for removal of toxic gases. (Mitsubishi Plastics Industries, Ltd.; Nippon Celcoat K. K., Japan). Jpn. Kokai Tokkyo Koho JP 58090930 A2 30 May 1983 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B29D027-00; C08J009-00. APPLICATION: JP 81-188401 26 Nov 1981. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 59 NiO2-contg. porous thermoplastic sheet or film for removal of toxic gases is prepd. by orienting a thermoplastic sheet contg. 10-200 phr Ni salt powder to form a porous sheet and treating with an alkali and a hypochlorite soln. Thus, a mixt. of 100 parts high-d. polyethylene [9002-88-4] and 75 parts NiSO4 powder (av. particle size 100 m) was extruded at 180-220° to a sheet form (thickness 5 mm), oriented at 5:1 ratios in both directions at 110°, and treated with 100 mL 6 NaOCl soln. contg. 42 g NaOH for 10 min to give a porous sheet contg. NiO2. A H2S [7783-06-4]-contg. N gas was passed through the above sheet with 100% H2S decompn. efficiency.

Electrochemical gas detectors

Electrochemical gas detectors. Becker, Wolf Jurgen; Breuer, Wolfram; Deprez, Jacques (Bayer A.-G., Ger.).In this study， 9011-14-7 and 10102-44-0 are also used. Ger. Offen. DE 2436261 12 Feb 1976, 25 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: G01N. APPLICATION: DE 74-2436261 27 Jul 1974. DOCUMENT TYPE: Patent CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 37, 79, 80 The title app., useful for detecting atm. pollutants in the the ppm-ppb range, consists of 2 electrodes in contact with H2O-free, org. gel electrolyte, the electrochem. equil. of 1 electrode being charged by the gas component to be detd. Thus, an electrolyte suitable for detection of 1 ppb-10 ppm H2S [7783-06-4], COCl2 [75-44-5], or HCN [74-90-8] consists of poly(Me methacrylate) [9011-14-7] 10.0, propylene carbonate solvent 87.0, BzOH [65-85-0] and NaOBz [532-32-1] electrolyte 2.0 and 0.5, and Fe2(SO4)3 [10028-22-5] doping agent 0.5%. The doping agent decreases the sensitivity of the electrolyte to moisture, the null-point current being 0.1 and 0.8 nA at 20 and 40% relative humidity in the presence of Fe2(SO4)3, and 6 and 8.8 nA, resp., in its absence. .