Basf Aktiengesellschaft

Kurt Scherling

Bruno Sander

Eckhard Bonitz

Rolf Steinberger

Eckhard Ropte

Heinz Berbner

Hans D Zettler

Otto Nagel

Friedrich Hovemann

Richard Sinn

Dieter Stoehr

A process for dewatering petroleum-containing sludges by a two-stage method using finely divided additives and organic flocculants, wherein

Dewatering of petroleum-containing sludges with recovery of the oil

Fibrids of polymers of styrene, which are obtained in a fluid precipitation medium under the action of shearing forces.

Manufacture of fibrids from polymers

Manufacture of fibrids from polymers or copolymers containing fluorine in a fluid precipitation medium under the action of shearing forces.

Fibrids are prepared by introducing a solution of a polymer into a liquid precipitation medium while exposing it to shearing forces. A poly(amide-imide) resin solution is admixed with a solvent which is miscible with the resin solvent but which is a non-solvent for the resin itself.

Manufacture of fibrids from poly(amide-imide) resins

Fibrids of polyolefins showing a high degree of fibrillation and a high specific surface area are obtained by flashing a pressurized solution or polyolefin in pentane or in a pentane-containing solvent by passing said solution through an orifice into a space which is at a lower pressure and in which shearing forces are applied to said solution. The fibrids directly obtained may be used, for example, for the manufacture of paper or for the manufacture of textile-like webs.

Manufacture of fibrids of polyolefins

Fibrids of polyolefins showing a high degree of fibrillation and a high specific surface area are obtained by flashing a pressurized solution of polyolefin in pentane or in a pentane-containing solvent mixture at a temperature above the boiling point of the solvent by passing said solution through an orifice into a space which is at a lower pressure and in which shearing forces are applied to said solution. The fibrids directly obtained may be used, for example, for the manufacture of paper or for the manufacture of textile-like webs.

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Hemsbach, Germany

Kurt Scherling