Basf Aktiengesellschaft

Bruno Sander

Eckhard Bonitz

Kurt Scherling

Heinz Berbner

Manfred Hoffmann

Rolf Steinberger

Eckhard Ropte

Siegfried Marquardt

Uwe Kempe

Gero Lueth

Jenoe Kovacs

Hans Rupert Merkle

Hans D Zettler

Knut Kaempfer

Albrecht Mueller

Klaus Hess

Hans Gettert

Hans G Keppler

Werner Simmler

Wolfgang Vodrazka

Otto Nagel

Joachim Kunde

Rolf Moeller

Friedrich Hovemann

Gerhard Janisch

Richard Sinn

Manfred Neuwirth

Robert K Horn

Walter Goesele

Dieter Stoehr

K Robert Mueller

Herbert Lauer

Heinz Voss

Wolfgang Gaerber

Peter Lintz

The soot obtained in the form of a soot-containing aqueous waste liquor in the course of synthesis gas manufacture is utilizable by

Utilization of soot from synthesis gas production in sewage treatment

A process for dewatering sewage sludges of which the sludge solids contain less than 70% of organic matter, and whose dewatering characteristics have been improved by adding organic flocculants, on a filter press, wherein the sewage sludges are concentrated by adding an organic flocculant during thickening by gravity sedimentation from 0.5-5.0% by weight of sludge solids to 6-14, and especially 8-12, % by weight of sludge solids, the sewage sludges are mixed with additives, such as finely divided coal or ash or mixtures thereof, in an amount of from 0.5 to 1.5 parts by weight per part by weight of sludge solids, and the sludges are treated, before, during or after admixture of the additives, with a further 2-8 kg or organic flocculant/tonne of sludge solids and are then dewatered on the filter press.

Process for producing combustible sewage sludge filter cakes in filter

Carbon black and ash containing wastewaters from high-temperature processes in which the carbon black is present in an extremely finely divided and partly colloidal state are cleaned and disposed of by treatment with organic flocculants, predewatering of the flocculated suspension by gravity filtration and post-dewatering of the carbon black sludge by pressure filtration within the range from 0.5 to 15 bar in a process comprising adding sufficient calcium hydroxide to the wastewaters that the pH of an aqueous extract of the filter cake obtained is more than 11.8, preferably more than 12.0.

Cleaning and disposal of carbon black and ash containing wastewaters

Wastewaters which contain carbon black and ash and originate from high temperature processes and in which the carbon black is present in a very finely divided state and partially in a colloidal state are treated and disposed of by a process in which the wastewater is treated with calcium carbonate or calcium hydroxide and an organic flocculant and subjected to a two-stage filtration and the resulting filter cake containing carbon black and ash is subjected to an aftertreatment with an aqueous iron salt solution.

Treatment and disposal of wastewaters containing carbon black and ash

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

A process for dewatering sewage sludges, the dewatering characteristics of which have been improved by adding an organic flocculant, on a chamber filter press, wherein the greater part of the water in the flocculated sludges is removed by gravity filtration in a process step upstream of the chamber filter press, without application of a pressure difference, and the actual pressure filtration, on the chamber filter press, is only then carried out. In principle, commercial products can be used as the organic flocculant. These are water-soluble, macromolecular compounds which have been obtained by polymerization or copolymerization of acrylamide, acrylic cid and/or their salts, or of esters of acrylic acid or methacrylic acid with specifically modified alcohol components.

Dewatering of sewage sludges on chamber filter presses

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

A process for converting viscous reactive chlorine- and sulfur-containing production residues into solid products which can be dumped, wherein the said residues are treated with alkaline materials. In a preferred embodiment of the invention, chlorine-containing and sulfur-containing production residues which are viscous and still reactive, e.g. the residues obtained from the manufacture of plant protection agents, dyes or fine chemicals, are converted in a simple and efficient manner into solid products which can be dumped. The treatment according to the invention has the advantage that no further pollution of the environment by waste gases or waste water results.

Conversion of viscous, reactive chlorine- and sulfur-containing

Fibrids from the constituents of the effluent from the manufacture of styrene bead polymers are used to product papery sheet-like structures, boards and shaped articles.

Production of paper sheets, boards and pulp molded articles from fibrids

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.

A process for the manufacture of fibrids by dissolving, in a solvent, macromolecular waste materials from the bead polymerization of styrenes, and introducing the solution into a precipitation medium under the action of shearing forces to form fibrids.

Utilization of constituents of effluent from the manufacture of styrene

The manufacture of paper-like and textile-like sheet materials by the use of fibrids which have been obtained by dissolving poly(amide-imide) resins in an organic solvent, mixing the resulting solution with a liquid which is a non-solvent for the polymer and introducing the resulting solution into a liquid precipitation medium while exposing it to shearing forces.

Growing community of inventors

Ludwigshafen, Germany

Bruno Sander