Olin Corporation

Craig A Foster

William G Bridges

Randolfo Galvez

Kurt R Raab

John H Shaffer

Walter J Sakowski

Larry G Carty

A thin, preferably flexible circuit having multiple conductive planes separated by a non-conductive layer is provided. Conductive vias electrically interconnect the conductive planes. The conductive vias comprise carbon coated blind vias which are made conductive by the electrolytic deposition of a metal on the carbon. The invention is particularly suited for G-TAB wherein a first metal plane is patterned into signal plane circuit traces and a second metal plane is patterned into ground plane traces.

G-tab manufacturing process and the product produced thereby

G-TAB having particular through hole

A process for producing calcium hypochlorite comprises wetting lime with an aqueous slurry of fine basic calcium hypochlorite crystals in a mixing zone to form an aqueous lime slurry. The aqueous lime slurry is reacted with a calcium hypochlorite solution in a crystallizing zone to produce a slurry of basic calcium hypochlorite crystals. The slurry of basic calcium hypochlorite crystals is separated in a first separation means into a slurry of fine basic calcium hypochlorite crystals and a slurry of coarse basic calcium hypochlorite crystals. The slurry of fine basic calcium hypochlorite crystals is returned to said mixing zone. The slurry of coarse basic calcium hypochlorite is conveyed to a second separation means to separate coarse crystals of basic calcium hypochlorite from a calcium hypochlorite mother liquor. Coarse crystals of basic calcium hypochlorite are admixed with lime and an alkali metal hypochlorite in a third mixing zone to form a mixed alkali slurry. The mixed alkali slurry is reacted with chlorine to form a paste of calcium hypochlorite dihydrate which is separated into a cake of calcium hypochlorite dihydrate and a paste liquor. The paste liquor is fed to the crystallizing zone. The cake of calcium hypochlorite dihydrate is dried to produce granular calcium hypochlorite. The novel process of the present invention produces crystalline basic calcium hypochlorite slurries having high filtration rates. In addition, the process provides improved crystal growth control and effectively prevents excess nucleation in the crystallization of the basic calcium hypochlorite.

Process for calcium hypochlorite

In a rotary drum spray grainer there is provided a deflector plate overlying the spraying nozzles in the spraying zone to provide a drying zone where spray grained particles fall in a substantially uninterrupted downward path through the drying gas.

Spray grainer

In a rotary drum spray grainer there are provided adjustable spraying nozzles in the spraying zone to achieve optimum spray pattern dispersion on the spray grained particles as the particles fall through the spraying zone.

Variably displaceable spray nozzles

In a process for preparing granular calcium hypochlorite particles, wherein hydrated triple salt crystals of calcium hypochlorite, sodium hypochlorite, and sodium chloride are reacted with a chlorinated lime slurry to form particles of calcium hypochlorite dihydrate, the resulting slurry is processed to separate the calcium hypochlorite dihydrate particles and the resulting particles are dried to form granular calcium hypochlorite particles, the improvement which comprises:

Growing community of inventors

Cleveland, TN, United States of America

Craig A Foster