Alliedsignal Inc.

Allied Corporation

Roger L Haley

Mansour Mashayekhi

Joe E Payne

Bill E Sparling

Howard L Simon

George H Collingwood

C Conrad Kempton

Gail L Erickson

A process and apparatus for the filtration of a creosote process stream laden with insoluble materials is provided. The apparatus comprises a filtration apparatus of a shell-and-tube configuration having filter material within for the separation of the xylene from the insolubles; the apparatus is comprised within a creosote filtration system which further includes a means for periodically backflushing the filtration system to reduce clogging of the filter material. The process and apparatus herein also finds use for filtration of other materials, including tars, pitches, and wastewaters.

Creosote filtration system with a shell and tube type filtration device

A stable creosote product is prepared from which little or no sludge heel settles and which does not require heat to be applied to prevent settling out of solids. The stable product is obtained by a method that mechanically reduces the particle size or the salts that form upon cooling below the limpid point. The layer of salt which settles on the bottom of the beaker is then mechanically broken and homogenized. The fine salts which had previously settled and were homogenized, did not resettle but remained relatively evenly dispersed throughout the mixture and remained dispersed even after prolonged periods of uninterrupted standing. The salts are not allowed to settle before homogenizing. Little or no heel formation was detected in the creosote in which the settled and material was homogenized as described.

Process for manufacturing creosote with non-settling out salts

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Russell, KY, United States of America

Roger L Haley