Polyethylene baskets

In some cases, particularly with iaactive metals, electrolytic cells are the primary method of manufacture of the fluoroborate solution. The manufacture of Sn, Pb, Cu, and Ni fluoroborates by electrolytic dissolution (87,88) is patented. A typical cell for continous production consists of a polyethylene-lined tank with tin anodes at the bottom and a mercury pool (ia a porous basket) cathode near the top (88). Pluoroboric acid is added to the cell and electrolysis is begun. As tin fluoroborate is generated, differences ia specific gravity cause the product to layer at the bottom of the cell. When the desired concentration is reached ia this layer, the heavy solution is drawn from the bottom and fresh HBP is added to the top of the cell continuously. The direct reaction of tin with HBP is slow but can be accelerated by passiag air or oxygen through the solution (89). The stannic fluoroborate is reduced by reaction with mossy tin under an iaert atmosphere. In earlier procedures, HBP reacted with hydrated stannous oxide. 

The polyethylene film thus obtained was packed in a 100 mesh stainless steel basket, extracted with hot p-xylene in a Soxhlet extractor for 48 hours, washed with acetone for 4 hours in the same type extractor, dried in vacuum for 20 hours at 40°C and weighed. The gel fraction (Gf) of the polymer was detrmined by the equation (2) from the weight change by the extraction. 

Shah et al.29 measured the gas holdup in a bubble column with vertically suspended rods and screen baskets packed with 3.2-mm polyethylene extrudates. The gas holdup data obtained in a batch system (i.e., no liquid flow) indicated that the gas holdup remained essentially unaffected by the presence of rods or baskets, as long as the open section of the column was approximately 70 percent or higher. As the volume occupied by the packed screen baskets or rods increased above 30 percent of the total column volume, the gas holdup was increased compared to the holdup in the absence of rods or baskets. This was presumably due to an increase in the actual velocity of the gas in the open section of the column. 

PEP CHIP. A microscc lc particle on a silicon wafer was fingerprinted as a piece of polyethylene terephthalate. ihe source of this contaminant was identified as a wafer handling basket. This result was especially surprising because these baskets had been "guaranteed not to chip and produce debris. 

The RHODIFUSE R lODE system is a modular system. Each module (food grade high density polyethylene open basket) contains three cylindrical silicone/sodium iodine matrices. 

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