Detail of "563-79-1"

Reference

Rate constants for reactions for singlet oxygen with phenols and other compounds in water

Rate constants for reactions for singlet oxygen with phenols and other compounds in water. Scully, Frank E., Jr.; Hoigne, Juerg (Swiss Fed. Inst. Water Resour. Water Pollut. Control, Duebendorf 8600, Switz.). Chemosphere, 16(4), 681-94 (English) 1987. CODEN: CMSHAF. ISSN: 0045-6535. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 67 Rate consts. for some environmentally important org. model compds.Several reagents with their cas registry numbers 100-02-7 and 88-06-2 are used here. reacting with singlet O in water were detd. in lab. expts. using Rose Bengal as a sensitizer. Dimethylfuran [625-86-5], furfuryl alc. [98-00-0], 2,3-dimethyl-2-butene [563-79-1] and Et2S [352-93-2] react ~3 times faster in water than in nonaq. solns. Phenolic compds. react faster at higher pH values. Their rate consts. exactly increase with their degree of dissocn. Rate consts. for the ionized species of these phenolic compds. are >108/m-s. In natural surface water under solar irradn., reaction with singlet O is important only for a few classes of esp. reactive org. compds. .

Oxidative dehydration of hydrocarbons

Oxidative dehydration of hydrocarbons. Hoppstock, Frederic H.; Frech, Kenneth J. (Goodyear Tire and Rubber Co., USA). Ger. Offen. DE 2637774 31 Mar 1977, 19 pp. (German). 7440-47-3 and 78-79-5 are cas registry numbers. These chemicals are also mentioned in this article. (Germany). CODEN: GWXXBX. CLASS: IC: C07C011-12. PRIORITY: US 75-614383 18 Sep 1975. DOCUMENT TYPE: Patent CA Section: 35 (Synthetic High Polymers) Section cross-reference(s): 23 C4-6 alkenes, EtPh, or iso-PrPh are oxidatively dehydrogenated using a catalyst contg. Co-Mo or Zn-Mo oxides, activated with Cr oxides and calcined .gtoreq.1 h at 400-1100.degree. before use. Thus, 10 g com. catalyst contg. 19% Cr2O3 on Al2O3 was treated with 0.1 g KOH in 5 mL water, calcined 1 h at 600.degree., treated with 1.5 g CoMoO4 in 18% HCl, and calcined 1 h at 600.degree. and 1 h at 940.degree.. This catalyst gave 2,3-dimethyl-2-butene [563-79-1] conversion 76% and 2,3-dimethylbutadiene [513-81-5] selectivity 81%, compared with 64% and 82%, resp., for a control catalyst without Cr. .