Hydrogen peroxide, removal

Hydrogen peroxide Removal of interferences by anion and cation resin, luminol CL, rainwater 35 nM 46... 

The aerial oxidation of solutions of complexes (330) has been investigated. Chromatography separation led to the identification of products which underwent dehydrogenation of the ethylene bridge (Scheme 31).2413 Such dehydrogenation reactions are inhibited by fluoroalkyl substituents and enhanced by alkyl substituents. Oxidation with hydrogen peroxide removes the ethylene bridge. 

The work of H. C. Brown has made hydroboration an enormously useful synthetic reaction. Oxidation of the adduct with alkaline hydrogen peroxide removes the boron smoothly without rearrangement and replaces it by a hydroxy group. The oxidation proceeds entirely with retention of configuration. For example, the product of Reaction 7.19 is converted by oxidation to trans-2-methylcyclopentanol in high yields (Equation 7.20). 

Hydrogen peroxide removes mold in a less toxic way. Make sure you are protecting yourself while using it. See www.mold-removal. biz/ mold-removal-1101.htm. 

Catalase Aspergillus niger Shelf life improvement of food Milk preservation Hydrogen peroxide removal... 

Trifluoroethanol46 Hydrogen peroxide Removal of sulfur-containing impurities... 

Tetrahydrofuran54 Alkaline hydrogen peroxide Removal of methacrolein impurity... 

Figure 2. Sodium hydroxide consumption in a standard oxidation of methyl a-D-glucopyranoside over Ti-MCM-41 with hydrogen peroxide ( ), removal of the heterogeneous catalyst after Ih and further reaction of the solution ( ) and upon re-use of the solid catalyst ( ).

In a 500 ml. three-necked flask, equipped with a mechanical stirrer, thermometer and dropping funnel, place 300 ml. of 88-90 per cent, formic acid and add 70 ml. of 30 per cent, hydrogen peroxide. Then introduce slowly 41 g. (51 ml.) of freshly distilled cyclohexene (Section 111,12) over a period of 20-30 minutes maintain the temperature of the reaction mixture between 40° and 45° by cooling with an ice bath and controlling the rate of addition. Keep the reaction mixture at 40° for 1 hour after all the cyclohexene has been added and then allow to stand overnight at room temperature. Remove most of the formic acid and water by distillation from a water bath under reduced pressure. Add an ice-cold solution of 40 g. of sodium hydroxide in 75 ml. of water in small portions to the residual mixture of the diol and its formate take care that the tempera... 

The chemical yield of hydrogen peroxide and the anthraquinone per process cycle is very high, but other secondary reactions necessitate regeneration of the working solution and hydrogenation catalyst, and the removal of organic material from the extracted hydrogen peroxide. 

Toxic or malodorous pollutants can be removed from industrial gas streams by reaction with hydrogen peroxide (174,175). Many Hquid-phase methods have been patented for the removal of NO gases (138,142,174,176—178), sulfur dioxide, reduced sulfur compounds, amines (154,171,172), and phenols (169). Other effluent treatments include the reduction of biological oxygen demand (BOD) and COD, color, odor (142,179,180), and chlorine concentration. 

Many electroless coppers also have extended process Hves. Bailout, the process solution that is removed and periodically replaced by Hquid replenishment solution, must still be treated. Better waste treatment processes mean that removal of the copper from electroless copper complexes is easier. Methods have been developed to eliminate formaldehyde in wastewater, using hydrogen peroxide (qv) or other chemicals, or by electrochemical methods. Ion exchange (qv) and electro dialysis methods are available for bath life extension and waste minimi2ation of electroless nickel plating baths (see... 

Precipitate formation can occur upon contact of iajection water ions and counterions ia formation fluids. Soflds initially preseat ia the iajectioa fluid, bacterial corrosioa products, and corrosion products from metal surfaces ia the iajectioa system can all reduce near-weUbore permeability. Injectivity may also be reduced by bacterial slime that can grow on polymer deposits left ia the wellbore and adjacent rock. Strong oxidising agents such as hydrogen peroxide, sodium perborate, and occasionally sodium hypochlorite can be used to remove these bacterial deposits (16—18). 

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