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US 4,017,592 AGranted
Process for production of aqueous hypochlorous acid solution
AssigneeComprimo B.V.
InventorsHerbert F. L. Penard, Johannis I. Risseeuw
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AssigneeComprimo B.V.
InventorsHerbert F. L. Penard, Johannis I. Risseeuw
Estimating the term…
Reactions in heterogeneous systems containing reactants in gaseous, liquid and solid phases are carried out in a tower composed of a series of superimposed reaction compartments mutually separated by horizontal shelves, through which the gaseous phase moves countercurrent to the liquid and solid phases and at the same time effects turbulent mixing with the liquid phase. The liquid and solid phases are introduced into the top compartment. The shelves are suitably perforated for upflow of the gas through bodies of mixed liquid and solids which are held on the shelves at levels determined by the heights of overflow pipes which conduct excess reaction mixture from each reaction compartment into the mixture in the compartment next below. Reaction products are taken off from the bottom compartment.
A method of reacting a gas with at least one of the phases of a mixture of solids and liquid, which comprises feeding a fluid suspension of the solids in the liquid continuously into the highest reaction zone of a series of reaction zones disposed vertically one above another, in each of said zones maintaining a layer of suspension at a predetermined depth and as the volume of suspension therein exceeds said depth overflowing the excess suspension in a stream thereof conducted into the layer of suspension in the next lower reaction zone and, in the case of the lowest of said zones, conducted into a collecting space below it, the respective overflow streams from successive reaction zones being spaced horizontally away from each other, flowing gas continuously upwardly through the respective layers of suspension in said zones in succession and subdividing the gas flow entering each of said layers into a multiplicity of gas streams having a velocity sufficient for turbulently agitating the suspension in the layer, the gas upflow through at least a plurality of said layers containing the reactant gas, and continuously taking off residual gas from said highest reaction zone, each of said overflow streams being conducted from the surface of the layer of suspension in one reaction zone into a bottom region of the layer of suspension in the next lower reaction zone at a location in the latter layer spaced horizontally away from the locations of entry of said gas streams thereinto, said suspension being an aqueous suspension of finely divided limestone and said gas consisting predominantly of chlorine, whereby a reacted suspension containing hypochlorous acid in aqueous solution is obtained in said collecting space.
A method of reacting a gas with at least one of the phases of a mixture of solids and liquid, which comprises feeding a fluid suspension of the solids in the liquid continuously into the highest reaction zone of a series of reaction zones disposed vertically one above another, in each of said zones maintaining a layer of suspension at a predetermined depth and as the volume of suspension therein exceeds said depth overflowing the excess suspension in a stream thereof conducted into the layer of suspension in the next lower reaction zone and, in the case of the lowest of said zones, conducted into a collecting space below it, the respective overflow streams from successive reaction zones being spaced horizontally away from each other, flowing gas continuously upwardly through the respective layers of suspension in said zones in succession and subdividing the gas flow entering each of said layers into a multiplicity of gas streams having a velocity sufficient for turbulently agitating the suspension in the layer, the gas upflow through at least a plurality of said layers containing the reactant gas, and continuously taking off residual gas from said highest reaction zone, each of said overflow streams being conducted from the surface of the layer of suspension in one reaction zone into a bottom region of the layer of suspension in the next lower reaction zone at a location in the latter layer spaced horizontally away from the locations of entry of said gas streams thereinto, said suspension being an aqueous suspension of ground limestone particles predominantly smaller than 0.08 inch in diameter, containing 15 to 35 grams of CaCO.sub.3 per kg of the suspension and having a temperature of 10.degree. to 30.degree. C., said gas consisting predominantly of chlorine, and the rate of feeding of said suspension being such that the resistance time of the suspension in each of said layers averages 0.5 to 2 minutes, whereby a reacted suspension containing more than 2% by weight of hypochlorous acid in aqueous solution is obtained in said collecting space.
Dependencies are inferred from the claim text.