Abstract: In place of the incinerator in the present GWTPs, the following is substituted therein: a first reactor treats the vapor phase of the gases being expelled out of the air stripper. These vapors contain gases of volatile contaminants. The vapors are mixed with ozone and pumped into the first reactor where they are further scrubbed and oxidized in a packed column in contact with high concentration hydrogen peroxide. The hydrogen peroxide flows downward through the packing column while the Ozone mixture is fed from the bottom. The combined effect of ozone and hydrogen peroxide serves as a powerful oxidizing medium. The hydrogen peroxide accumulated at the bottom is pumped to the top in a recirculation process to be reused. The hydrogen peroxide can be increased to high concentrations, such as 30%, and recirculated for optimum usage. The second reactor is designed for the water, that is, for liquid phase treatment.

Abstract: A flame retardant prepolymer composition for imparting flame retardance to cotton, cellulosic textiles, and certain other materials; the process for preparing the prepolymer composition; and the application technique of said prepolymer composition are disclosed. Tetrakis(hydroxymethyl)phosphonium sulfate, a THP salt, is acidified, ammonia gas is bubbled into the mixture to achieve a constant boiling, these steps are repeated a number of times, and the prepolymer mixture thus prepared is then applied to a substrate, followed by treatment with a caustic solution.