74 results about "Catalytic rate" patented technology

The invention discloses a spiroketal frame bidentate phosphoramidite ligand as well as a preparation method and an application thereof. The ligand is the compound shown in a formula I or II or the enantiomer, racemate or diastereoisomer of the compound; and the ligand is prepared by condensation reaction of the compound in the formula I or II, and phosphorus-chlorine compounds. The spiroketal frame bidentate phosphoramidite ligand disclosed by the invention and transition metal salt form a complex, and the complex can be used for terminal olefine hydroformylation or isomerization-hydroformylation of internal olefins; and moreover, the spiroketal frame bidentate phosphoramidite ligand has high catalytic rate, good selectivity and practical value.

The invention relates to a water treatment method, particularly a water treatment method for ultrasonically improving oxidation of pollutants with permanganates, and aims to solve the problems in the prior art the speed of oxidation with permanganates is slow, the treatment effect is not stable, the dispersion of produced manganese dioxide nanoparticles is poor and the catalytic rate is low. The method has three forms. The first form comprises the following steps of: pre-treating water; feeding the effluent into a mixing pond, a flocculation pond and a precipitation pond in sequence; filtering the effluent; feeding to a clear water pond and sterilizing. The second form comprises the following steps of: feeding the water into a mixing pond and then pre-treating the water, feeding the effluent to a flocculation pond and then a precipitation pond, filtering the effluent, feeding to a clear water pond and sterilizing. The third form comprises the following steps of: feeding the water intoa mixing pond; adding permanganates, inducers and coagulants under ultrasonic action; feeding the effluent to a flocculation pond and then a precipitation pond; filtering the effluent; feeding to a clear water pond and sterilizing. The method has stable operating effects, is favorable for the dispersion of manganese dioxide nanoparticles which are used as the reduction product of permanganates, improves the catalytic ability of manganese dioxide in oxidation of permanganates, and promotes the decomposition of permanganates to produce highly-active intermediate-state manganese.

A portable catalytic combustion heater, wherein fuel vapor (11) and air (10) are supplied to a catalyst (6) which promotes the flameless combustion of fuel and releases that. The fuel is supplied as a liquid, passes through a selectively permeable membrane (8) such as fuel vapor exits the membrane and is fed to the catalyst (6). Additional features include porous supports and means of enhancing and diminishing the catalytic rate of combustion and controlling the heat output.