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In solvent casting and particulate leaching (SCPL), a polymer is dissolved in an organic solvent. Particles, mainly salts, with specific dimensions are then added to the solution. The mixture is shaped into its final geometry. For example, it can be cast onto a glass plate to produce a membrane or in a three-dimensional mold to produce a scaffold.
In a chemistry laboratory a solvent cabinet is a chemical storage cabinet or cupboard which is properly labeled and equipped, for the storage of solvents (especially those that are combustible). A solvent cabinet should be positioned separately from acid cabinet or base cabinet (used for storing acids and caustic bases respectively, as solvents ...
Biological substances can experience leaching themselves, [2] as well as be used for leaching as part of the solvent substance to recover heavy metals. [6] Many plants experience leaching of phenolics, carbohydrates, and amino acids, and can experience as much as 30% mass loss from leaching, [5] just from sources of water such as rain, dew, mist, and fog. [2]
As a result, new products and processes are readily developed and implemented, facilitating cost-effective creation of very feature rich and complex catheters. Since the 1990s, Avalon Laboratories and Piper Plastics Corp. have aggressively pioneered polymer solution casting technology, focusing on complex medical devices.
In vat leaching typically a coarser material is placed in the vat for leaching, this reduces the cost of size reduction; Tanks are typically equipped with agitators, baffles, gas introduction equipment designed to maintain the solids in suspension in the slurry, and achieve leaching. Vats usually do not contain much internal equipment, except ...
Large scale equipment developed for on-off heap leach technology for copper ore in 1994. In 1998, large, customized gearboxes for bucket-wheel drive gearboxes were developed while, in 2000, the longest conveyor for its time was supplied.
The solvent that is enriched in solute(s) is called extract. The feed solution that is depleted in solute(s) is called the raffinate. Liquid–liquid extraction is a basic technique in chemical laboratories, where it is performed using a variety of apparatus, from separatory funnels to countercurrent distribution equipment called as mixer settlers.
Low cost, no need for large uranium mill tailings deposits. After termination of an in-situ leaching operation, the waste slurries produced must be safely disposed, and the aquifer, contaminated from the leaching activities, must be restored. Groundwater restoration is a very tedious process that is not yet fully understood. [citation needed]