Wacker-chemie Gmbh

Wacker Chemie Ag

Helmut Maginot

Herbert Barthel

Torsten Gottschalk-Gaudig

Mario Heinemann

Henry Hackbarth

Johann Lindhuber

Franz Gr&uuml;nwald

Franz Stadler

Peter Pfaffinger

Carl-Heinz Ehrke

Ute V&ouml;lkel

Armin Grossmann

Improved utilization of organosilicon compounds in hydrophobicizing finely divided particulate solids is accomplished by metering a partial amount of unreacted solids with organosilicon containing offgases derived from admixing and reacting a major portion of solids with organosilicon compounds and admixing the offgas-treated solids with the major portion of solids to be treated.

Process for surface modification of particulate solids

Particles having a relative viscosity or thickening effect &#x3b7;of more than 2, measured in a liquid medium having a viscosity of 1 Pas at a temperature of 25&#xb0; C. and measured at a shear gradient of 10 s. The particles can form beds having a porosity &#x3b5;&#x3e;0.5 in a dry form.

Particles having a small specific surface and a great thickening effect

A large scale process for preparing fumed silica with consistent product parameters wherein a silica precursor compound is fed to a burner at &#x2267;100 Kg/h along with a combusting gas at &#x2267;300 m/h and a combustible gas at &#x2267;100 m/h, with a nozzle gas velocity between 10 and 200 m/s, and a radially symmetrical, homogenous gas velocity and gas temperature.

Pyrogenic silica produced in a production facility with high capacity

A silylated silica having an SiOH density per nm of less than 0.6, based on the BET-method surface area (DIN 66131 and 66132), is prepared by silylating silica in a process where loading, reacting, and purifying are performed in separate steps.

Low-silanol silica

A large drum for containing high dispersion, high air content solids for repeated filling and emptying by means of vacuum filling plants and a method for filling them. The drums consist of at least two layers, an inner layer consisting of uncoated air-permeable fabric and an outer layer being coated so as to be dust tight and provide a moisture barrier. These layers being connected to one another by means of a special seam, so that it is possible for the drum to be deaerated solely through this seam. The seam includes an air-permeable dust-retaining filter strip material disposed between the drum layers.

Large drums for high-dispersion, high air content solids, and a method for filling them

A method for the multiple filling and emptying of a receptacle with pourable product having low bulk density. The method comprises the following features:

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Burgkirchen, Germany

Helmut Maginot