Reference

Catalytic reduction of nitrogen oxides in flue gases from a nitric acid plant

Catalytic reduction of nitrogen oxides in flue gases from a nitric acid plant. Tanabe, Masanori; Ichikawa, Yasushi; Koike, Toshihisa; Tamura, Nobuhiro; Ohki, Kusuo; Yamamoto, Tadatsugu; Obana, Hideaki; Inoue, Toshio (Asahi Chemical Industry Co., Ltd., Japan). Japan. Kokai JP 51063362 1 Jun 1976 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01D053-34. APPLICATION: JP 74-136641 30 Nov 1974. DOCUMENT TYPE: Patent CA Section: 59 (Air Pollution and Industrial Hygiene) NOx in flue gases from a HNO3 plant are effectively reduced by treating with NH3 in the presence of a catalyst contg. a Cu(II) compd. and Group IIB metal compd. in a 1: (0.1-5) mole ratio preferably at 250-350.degree.. Thus, 1000 cm3 .alpha.-Al2O3 (av. particle size 5 mm) was dipped in 0.3M Cu(NO3)2 [3251-23-8] soln. for 1 h, fired in air at 450.degree. for 3 h, dipped in 0.015M ZnCl2 soln. for 1 h, and again fired at 450.degree. for 3 h to obtain a catalyst, 40 cm3 of which was packed into a stainless steel tube (diam. 20 mm). When a flue gas contg. NO 200, NH3 200 ppm, O 3, H2O 10, and balance N was passed through the steel tube (350.degree.) at 7500 h-1, the NO removal was .apprx.80%, compared to .apprx.50% when a catalyst contg. only a Cu(II) compd. was used.

Catalysts for hydrolysis of alkylene carbonates

Catalysts for hydrolysis of alkylene carbonates. (Nippon Shokubai Kagaku Kogyo Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58159849 A2 22 Sep 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01J023-72. ICA: C07C029-12; C07C031-20. 3251-23-8 and 96-49-1 which are cas registry numbers are also used here. APPLICATION: JP 82-42942 19 Mar 1982. DOCUMENT TYPE: Patent CA Section: 23 (Aliphatic Compounds) Catalysts for hydrolysis of alkylene carbonates were prepd. by impregnating Al2O3 or SiO2 with Cu compd. soln., heating at 100-200° and calcination at >300°. Thus, 30 g SiO2-Al2O3 was impregnated with a soln. of 5.71 g Cu(NO3)2 in H2O, boiled at 100°, heated in air at 120°, and calcined at 550° to give a catalyst, over which (1 g) was heated 88 g ethylene carbonate and 27 g H2O under 5 kg/cm2 N at 120° to give 99.9% ethylene glycol. .