초록 ▼

A method of paint sludge conversion and sludge removal from a sump pit for disposal is provided which is particularly adapted for use with paint waste sludge derived from wet spray booth operations. The method involves blending with the starting sludge caustic, oil and emulsifiers. Water may be adde

A method of paint sludge conversion and sludge removal from a sump pit for disposal is provided which is particularly adapted for use with paint waste sludge derived from wet spray booth operations. The method involves blending with the starting sludge caustic, oil and emulsifiers. Water may be added to achieve a desired water to total solids weight ratio. The product is a pumpable liquid disperse system which is easily charged to tankers or the like for pump out from the sludge pit.

대표청구항 ▼

A method for removal of sludge from a pit employed to collect paint wastes and residues generated in a wet spray booth operation, containing a mixture of accumulated sludge and water comprising the steps of: (a) adding a detackification agent comprising: (1) a water soluble cationic polymeric coagul

A method for removal of sludge from a pit employed to collect paint wastes and residues generated in a wet spray booth operation, containing a mixture of accumulated sludge and water comprising the steps of: (a) adding a detackification agent comprising: (1) a water soluble cationic polymeric coagulant comprising a water soluble polymer formed by the reaction of epichlorohydrin, diethylamine and ammonia and having a number average molecular weight of about 50,000, and (2) an aqueous colloidal silica sol having an average particle size between about 1 and 150 nm, the weight ratio of said polymeric coagulant to said silica sol being in the range of 1:5 to 5:1 to form a sludge mixture; (b) admixing with at least a portion of the sludge mixture of step (a): (2) sufficient caustic to raise the pH of the mixture to a value in the range of about 8.5 to 12, (2) sufficient hydrocarbon oil to produce a total solids to liquid volume ratio of about 1:2 to 1:3, and (3) a liquid emulsifier having a volume ratio to the oil of about 1:3 to 1:11; (c) recirculating the resulting sludge composition in at least a portion of said pit until a pumpable liquid dispersion system is produced, said dispersion system being comprised of: (1) an aqueous continuous phase, and (2) a disperse system dispersed in such continuous phase comprised of particles and liquid droplets; and (d) removing the dispersion from the pit.