The Dow Chemical Company

Kenneth O Groves

Gerald A Gimber

Elliot M Haschke

Thomas A Vivian

Robert J Nankee

A process is disclosed for reducing the evolution of fine particles during the removal of a solvent from a mass of solid particles containing the fines or which solid particles are attritable to produce the fines in the prior treating steps and/or the solvent removal step. The process employs the addition of 1 to 20 percent by weight of water to the solid particles/solvent prior to or during the solvent removal operation.

Process for controlling fines entrainment while drying solids

A method of reclaiming clear PET resin from bottles and other containers is disclosed. PET resin contaminated with a hot melt type polyethylene copolymer based glue is treated with a chlorinated solvent and optionally subjected to azeotropic drying.

Recovery of polyethylene terephthalate (PET)

There is described a process based on unit operations conventionally employed but modified to enable the use of chlorinated solvents, particularly methylene chloride as the preferred solvent for extraction of the bitumen from the tar sands or shale. The process in general constitutes:

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Midland, MI, United States of America

Kenneth O Groves