als, and at least one metal originating from a wastewater treatment coagulant, in order to recover the phosphorus and the at least one metal, and to discharge the heavy met- als, wherein the at least one metal com- prises iron or both iron and aluminum com- prising subjecting the acidified sludge to liquid-liquid extraction to thereby provide an aqueous phase or raffinate, and recover- ing at least a portion of the at least one metal.

Method for Sludge Dewatering US. Patent 5,720,887. Feb. 24, 7998 S. R. Vescoflce//o.s ef al., assignors fo BefzDeafbom Inc., Trevose, Pa.

A method for dewatering sludge having a pH greater than 8 and containing oil comprising the step-wise addition to the sludge of an effective dewatering amount of a cationic pnlyamine polymer.

Cationic Copolymer Flocculant U.S. Pafent 5,720,888. Feb. 24, 1998 L.L. Kuo and R.Y Leung, assignors to 5efzDearbom Inc., Trevose, Pa.

A method of flocculating coagulated and/or finely divided suspended matter in

aqueous systems comprising adding to the system from 0.005 to 1% by weight of at least one water-soluble cationic copolymer.

Method for Reducing Copper Oxide to Metal U.S. Patent .5,727,014. Feb. 24, 1998 J. hkler et al., assignors to Surfac8 Tek Specialty Producfs Inc., Scot&dale, Ariz.

In a method of bonding copper and a resin together wherein a copper oxide layer is reduced to metallic copper and the me- tallic copper is bonded to a resin, the im- provement comprising reducing the copper oxide layer to metallic: copper with an aqueous reducing solution containing mor- pholinc borane.

Basecoating Paint U.S. Patent 5,721,015. Feb. 24, 1998 G. lwamura et al., assignors to Mazda Motor Corp., Hiroshima and Dainnippon Ink and Chemicals Inc., Tokyo

A coating method comprising coating a base paint containing a hydroxyl group- containing oligomer and an aminoplast resin, coating thereon a clear coating paint of a curing system different from that of the

basecoating paint in a wet-on-wet state, and then baking the resultant coatings, wherein a curing catalyst is incorporated into the basecoating paint.

Multilsyer Coating U.S. Patent 5,721,018. Feb. 24, 7998 W. Glildner et al, assignors to Herbatis Gmbti, Wupper/a/, Germany

A process for preparing a multilayer coating on an electrically nonconductive surface of a substrate, the durface option- ally having thereon a primer, which com- prises applying over the optional primer- coated surface an aqueous dispersion containing a bosecoat resin of 70 to 100% by weight of one or more partially or com- pletely acid neutralized cationic polyure- thane, and polyurethane-urea resins, and 2 to 25%’ of one or more cross-linking com- ponents of an amine-formaldehyde conden- sation resin. and an amine-formaldehyde in admixture with a blocked polyisocyanate; applying a clear anionic coat 3s an aqueous solution, or in a solution of a powder in an organic solvent; and curing the basecoat and clear anionic coat together at a temper- ature below 160°C.

- all non~mag&&c caeurln& +j$ -all insulating coating5 applied ovftr Ron&rtcKls metals _ available with or without statistics and memory - activated interface -easy to read digital display -simple and fast calibration

Circle 083 on reader information card Circle 036 on reader information card

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