Gutehoffnungshutte Sterkrade Aktiengesellschaft

Maschinenfabrik Augsburg-nurnberg Aktiengesellschaft

Laboratoire Suisse De Recherches Horlogeres

Laboratoire Suisse De Recherches Horlogeries

Hartmut Griepentrog

Hans E Hintermann

Hans Erich Hintermann

Hans Gass

Liquid natural gases are vaporized by directing them into heat exchange relationship with waste heat produced from a thermal power engine. In a closed turbine cycle system, vapor which is discharged from the turbine is passed through one or more heat exchangers and the natural gas is moved through the heat exchanger in heat exchange relationship with the vapor to effectively cool the vapor as well as to evaporate the natural gases which are supplied in a liquid form, for example.

Method and apparatus for vaporizing liquid natural gases

A diffusion barrier and separation substance for metal parts which adjoin each other in an oxygen-free, inert and preferably a helium-containing atmosphere such as used in a closed-cycle high temperature reactor or gas turbine comprises first and second adjoining metal parts with a hexagonal boron nitride placed between said parts. The hexagonal boron nitride is applied to the boundary surface of the metal parts in an aqueous or organic suspension prepared as a pasty, putty-like or brushable liquid substance. The substance contains from 5 to 50% of boron nitride, from 0.5 to 30% of binders and from 2 to 6% of swelling agents and 50 to 90% liquid suspension medium. The suspension medium may advantageously contain an anti corrosive agent and in addition the formed protective film is burned from 0.25 to 3 hours at a temperature of from 100.degree. to 500.degree. C.

Diffusion barrier and separation substance for metal parts adjoining

A diffusion barrier and separation substance for metal parts which adjoin each other in an oxygen-free, inert and preferably a helium-containing atmosphere such as used in a closed-cycle high temperature reactor or gas turbine comprises first and second adjoining metal parts with a hexagonal boron nitride placed between said parts. The hexagonal boron nitride is applied to the boundary surface of the metal parts in an aqueous or organic suspension prepared as a pasty, putty-like or brushable liquid substance. The substance contains from 5 to 50% of boron nitride, from 0.5 to 30% of binders and from 2 to 6% of swelling agents and 50 to 90% liquid suspension medium. The suspension medium may advantageously contain an anti-corrosive agent and in addition the formed protective film is burned from 0.25 to 3 hours at a temperature of from 100.degree. to 500.degree. C.

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Oberhausen, Germany

Hartmut Griepentrog