Nitrogen removal over

A,-----), nitrogen removal over Ni-W (+), sulfur removal over Ni-Mo ... 

X), oxygen removal over Ni-Mo and (0), nitrogen removal over Nir-Mo. 

CANON [Completely Autotrophic Nitrogen Removal Over Nitrite] A process for removing nitrogen from sewage sludge in an anaerobic digester. Developed and piloted in the University of Santiago de Compostela from 2001. 

Iwamoto, M., Mizuno, N. and Yahiro, H. (1991) Removal of nitrogen monoxide over copper ion-exchanged zeolite catalysts, Sekiyu Gakkaishi, 34, 375. 

The pentane layer is separated and the aqueous layer is extracted twice with 60-ml portions of pentane. The combined pentane solutions are washed three times with 400-ml portions of ice-cold water and dried over magnesium sulphate under nitrogen. Removal of the pentane under vacuum gives 249 mg (97%) of crude aldehyde 240 mg of this oil is dissolved in c. 2 ml of pentane and filtered through a 3 cm x 2.5 cm column of deactivated silica gel (1) and the column eluted with pentane. Removal of the pentane gives 215 mg (89%) of a very pale yellow oil. Spectra (n.m.r. and i.r.) show the oil to be pure octanal. 

After 15 min, divert the nitrogen stream over the surface of the solution, and remove the tissue from the cell. 

Titanium tetrachloride (British Drug Houses) is stirred over copper powder under nitrogen at ca. 80° for 3 hr before vacuum distillation into a storage ampul (Fig. 9a). Immediately before use, a TiCU-hexane solution (ca. 1 mmole of TiCU per milliliter of hexane) is prepared by vacuum distillation of a weighed quantity of titanium tetrachloride from the storage ampul into a 100-ml flask by short-path vacuum distillation. The flask is filled with nitrogen, removed, and quickly stoppered with a serum cap. The required volume of hexane is syringed into the flask. 

To determine the order of reaction, commercially available nitrogen of 99.95 mole % purity was used as diluent in some experiments. Trace amounts of oxygen in the nitrogen were removed over reduced copper gauze at ca. 400°C. 

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