Hydrogen titanium phosphate

In this paper we have employed the ion-exchange technique to prepare VO " " exchanged titanium phosphates as catalysts for the SCR process. The influence of precursor phase (crystalline or amorphous hydrogen titanium phosphate or half sodium exchanged titanium phosphate) was also investigated. 

Pt deposited on WS2-Ti02 mesoporous composites was used for visible-light production of H2 in the presence of Na2S as radical scavenger [188]. Pt-loaded mesoporous zirconium-titanium phosphates also displayed good photoactivity in hydrogen production from carbonate solution [189]. 

Kapoor, M.P., Inagaki, S.,and Yoshida, H. (2005) Novel zirconium-titanium phosphates mesoporous materials for hydrogen production by photoinduced water splitting. Journal of Physical Chemistry B, 109 (19), 9231-9238. 

Inorganic chemicals and fertilizers include acids (e.g., sulfuric, nitric) and alkalies (e.g., caustic soda, soda ash), chlorine, ammonia, and ammonia-derived fertilizers. They also include fluorine derivatives (e.g., hydrogen fluoride), phosphates, potash, pigments (e.g., titanium dioxide), and certain metals such as mercury. 

Other catalysts, used in types of reactions not listed above, vary with the specific reaction involved. A few examples are cited. For the reaction involving the removal of hydrogen from NHa and CH4 to produce HCN, noble-metal catalysts are used. For the synthesis of benzonitrile from toluene and NHs by splitting out hydrogen, molybdenum trioxide is used. 2-Methyl-5-ethylpyridine is produced by reacting methylvinyl ether and NHs at elevated temperatures and pressures over a titanium phosphate or manganese phosphate catalyst supported on calcined silica. ... 

The ion-exchange technique allows to prepare VO modified titanium phosphates. Different vanadium loadings can be obtained by properly controlling the operating exchange conditions and precursor phase. Vanadyl modified titanium phosphates catalysts were found active and selective towards SCR reaction, either as hydrogen or pyrophosphate phase. The results obtained in this paper indicate that the activity of the materi s can be relate to vanadyl species whose redox properties affect the catalytic behaviour. 

The colour is unaffected by the presence of phosphate or fluoride. Titanium and molybdenum) VI) (which give colours with hydrogen peroxide) and tungsten interfere. Titanium may be removed by adding fluoride or hydrofluoric acid, which simultaneously remove the yellow colour due to iron(III). If titanium is absent, phosphate may be used to decolorise any iron(III) salt present. Oxalic acid eliminates the interference due to tungsten. In the presence of elements... 

Sodium phosphate solution white precipitate of zirconium phosphate, Zr(HP04)2 or Zr0(H2P04)2, even in solutions containing 10 per cent sulphuric acid by weight and also tartrates and citrates. No other element forms an insoluble phosphate under these conditions except titanium. The latter element can be kept in solution as peroxotitanic acid by the addition of sufficient hydrogen peroxide solution, preferably of 100-volume strength, before the sodium phosphate is introduced. 

RESOLUTION (S)-1 -Amino-2-( silyloxyme-thyOpyrrolidines. I, I -Binaphthyl-2,2 -diyl hydrogen phosphate. t-Butyl hydroperox-ide-Diisopropyl lartrate-Titanium(IV) iso-propoxide. Di-p.-carbonylhexacarbonyldi-cobalt. (2S)-(2a,.3aa,4a,7a,7aa)-2,3,3a,4,5,6,7,7a-Octahydro-7,8,8-trime-thyl-4,7-methanobenzofurane-2-ol. 

Per vial 8.32 mg tranexamic acid 136.24mg dipotassium hydrogen phosphate 51.27 mg phosphoric acid 364 mg sucrose 5.2 mg polysorbate 80 Each 200 mg ribavirin capsule contains capsule shell of gelatin and titanium dioxide... 

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