Walnut shells

Softer metals such as aluminum and its alloys can be blast cleaned using abrasives that are not as hard as those used on steel. Garnet, walnut shells, corncobs, peach pits, glass or plastic beads, and soHd carbon dioxide have been used successfully. 

Sand and other forms of quartz are used as a powder in sandblasting. If a gender abrasive material is wanted, powdered walnut shells are often used. 

Cogeneration systems can also use renewable fuel sources such as wood, waste products, wood gas or methane from sewage and garbage. The Sun-Diamond plant in Stockton, California used waste walnut shells into electricity for the plant and nearby homes. The walnut shells were used as fuel to produce steam to drive a turbine generator. The low-pressure steam output was then used for heat as well as to refrigerate the plant. The Sun-Diamond cogeneration system produced about 32 million KWH of electricity per year. It only used 12 million and sold the surplus power to Pacific Gas and Electric Company. 

Car-Prill, A blasting expl consisting of prilled AN ca 91.6%, ground walnut shells ca 4.6% Diesel oil ca 3.8%. It belongs to the class of blasting agents called "Nitro-Carbo-Nitrates . 

In the past, phenolic mixes were simply a combination of the phenolic resin with a filler such as walnut shell flour or pecan shell flour. These type mixes are still used in some hardwood exterior plywood. Todays phenolic glue mixes for softwood plywood involve mixing phenolic resin with water, filler, extender and sodium hydroxide (usually 50 percent). 

Henna. Henna is the oldest and most widely used vegetable dye utilized in hair coloring. A temporary chestnut color is produced in blond or auburn hair by applying a paste of henna flowers and leaves ground in hot water immediately before use. (The dye is unstable in aqueous solution.) The addition of indigo achieves darker blue-black shades extracts of walnut shell or logwood enhance brown coloration. 

Other natural hair dyes that have been used down the centuries have been indigo (chemical name 2-[i,3-dihydro-3-oxo-2H-indol-2-ylidene]-i,2-dihydro-3H-indol-3-one) extracted from Indigofera, a plant of the pea family, and pyrogallol (chemical name 1,2,3-trihydroxybenzene) extracted from walnut shells. This last dye was banned for use in the EU in 1992-... 

The phenol-formaldehyde resin used as a control adhesive was a commercial resin (control P) characterized previously (0). A second phenolic resin (control C), used once, is reported to have 40.1% nonvolatiles, a viscosity of 0.42 Pa-s, and a specific gravity of 1.180 at 25 °C. Its measured pH was 11. For use, it was mixed with 15% walnut shell flour. 

When a brown natural dyeing turns yellow upon vatting with sodium dithionite and ammonia and the original shade returns upon reoxidation, the dyeing probably was produced with walnut shells (C.I. Natural Brown 7) or some other hydroxynaphthoquinone. 

Granular particles can be prepared in several ways. The toxicant may be added so as to impregnate the granule and thus be completely released only when the granule breaks up. It may be surface-coated on the granule using a volatile solvent, which evaporates from the formulation. The inert diluents can be clays or organic materials such as corncobs, pecan shells, tobacco stems, and walnut shells. 

Diluents, sometimes known as inerts or carriers, play an important role in the behavior of the formulated product. Diluents have been prepared from agricultural wastes such as walnut shells, pecan shells, tobacco stems, and corncobs from minerals such as kaolinite, attapulgite, and talc and from fossilized deposits such as diatom beds. The exact diluent used in a given preparation depends on cost, properties, and availability. Dusts require low sorptive inerts to minimize the toxicant-diluent interaction. For WPs, inerts must be high in sorptive power because they carry a large amount of toxicant especially when the toxicant is a liquid. Otherwise, the formulated product would be likely to cake badly in storage. It is required that a diluent must be truly inert. However, formulators often find that an inert diluent contains hot spots or alkalinity to inactivate part of the toxicant. In this case, urea can be used as a deactivator to counteract the undesirable effects in some dust and wettable formulations (Terriere, 1982). 

Burnishing of more complex small shapes can be done by tumbling them in molybdenum disulphide powder, and pieces of wood, cork, walnut shells or pine cones have been added to help the burnishing process. Larger components of complex shape can be burnished by a similar process, but the component should be held between suitable chucks and rotated at low rpm, with the molybdenum disulphide powder and the pieces of burnishing material held inside a shroud around the component. Quality control in such processes can be difficult because of the problem of achieving uniform film deposition. 

Granules are very much like dusts except that the inert particles are much larger. Granules are normally made by applying a liqnid formulation of the active ingredient (ranging from 2% to 40% by weight) to particles of clay or other porous materials such as com cobs or walnut shells. 

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