Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Frank Joseph

Helmuth Krauss

Holger Jurgensen

Werner Gunkel

Peter Muller

Klaus Kreher

Gunter Sielaff

Norbert Harder

An extraction valve head for a tank for high-purity and/or toxic liquid chemicals has an inlet valve for a filler gas, an outlet valve and a purging valve, which closes a bypass between a gas inlet line and an extraction line. The valves are configured as metal diaphragm valves and are fitted in a common metallic valve housing block. All valve seals of the valves are arranged in close spatial proximity to one another in the valve housing block.

Extraction valve head for tanks

To produce a gas mixture by the saturation method, liquid is fed from a stock vessel to a separate reaction vessel. A carrier gas enters through a dip tube into the liquid present in the reaction vessel and is saturated by the liquid. The reaction vessel consists, for example, of quartz and is disposed in a metal block connected to a temperature control system. A level sensor fitted to the reaction vessel controls a flow regulation instrument on the liquid feed. The volume of the reaction vessel is substantially smaller than the volume of the stock vessel. Only the temperature of the reaction vessel is controlled. Temperature control of the stock vessel is not required. The saturation process in the reaction vessel takes place uniformly, independently of the temperature and the level in the stock vessel.

Apparatus for producing a gas mixture by the saturation method

A sliding valve for withdrawing liquid or gaseous chemical products from a container has a cylindrical valve spool which slides axially in a bore through a valve housing. A first annular groove of the valve spool connects, in the open position of the valve, a product supply line to a product withdrawal line. On one side of this first annular groove there is a second annular groove which, in the open position, connects a gas supply line to a gas withdrawal line. An annular groove on the other side is connected to the second annular groove. By this arrangement, protective gas is admitted to the valve spaces on either side of the first annular groove, which handles the product, with the result that escape of the product to the outside, or penetration of impurities, are positively prevented.

Valves for chemical containers

The present invention provides a transport container for very pure liquid chemicals having an inner container or flask made of synthetic resin with an upper sealing flange, the inner container being in an outer container, which has a protective collar, provided with openings, surrounding the sealing flange at a distance. The inner container 1 is made of two skins, the inner skin being made of an inert fluoro-synthetic resin and the outer sheet 10 being made of glass-fiber-reinforced synthetic resin completely enclosing the inner skin. The outer skin 10 is in one piece with a cylindrical mantle 11, the upper section of which forms the protective collar 14.

Transport container

A container intended for transporting and discharging aggressive liquids, such as silicon tetrachloride, is closed with a container lid which carries a valve head. The inner surfaces of the container and of the container lid are lined with fluorinated hydrocarbon. The valve head has a valve block which, in valve block drilled holes accommodates valve inserts and is enclosed by a steel jacket which is bolted to the container lid. All the parts which come into contact with the aggressive liquid consist of fluorinated hydrocarbon, so that contact between the aggressive liquid and metal is avoided.

Growing community of inventors

Gernsheim, Germany

Frank Joseph