Abstract: A method for fusing aramid fibers, wherein a) at least one area of an aramid fiber is treated with an ionic liquid so that the aramid is partially dissolved, b) the aramid fiber is contacted via the dissolved area with another aramid fiber area with pressure being applied to the contact area, and subsequently c) the partially dissolved area of the aramid is re-coagulated.

Abstract: The present invention relates to a method method for bonding a thermoplastic material by way of providing a thermoplastic material, applying an ionic liquid to a surface of the thermoplastic material, contacting the thermoplastic material with a separate material, and exposing the resulting arrangement to microwave radiation to melt the surface of the thermoplastic material to which the ionic liquid was applied and allow the adherence of the thermoplastic material to the separate material.

Abstract: A method for welding aramid fibers, wherein a) at least one area of an aramid fiber is treated with an ionic liquid so that the aramid is partially dissolved, b) the aramid fiber is contacted via the dissolved area with another aramid fiber area with pressure being applied to the contact area, and subsequently c) the partially dissolved area of the aramid is re-coagulated.

Abstract: Cooling medium comprising an ionic liquid with a hydrogen content of 0% to 8.5% by weight. The cooling medium can be used in a method for cooling a technical device, examples of which include: metallurgical ovens and their aggregates, ovens and aggregates in the glass and ceramic producing industry, ovens and aggregates in the cement producing industry, reactors and aggregates in gasification of organic matter and biofeedstocks, ovens and aggregates in incineration plants, reactors and aggregates in nuclear power plants, and combustion chambers and aggregates in conventional thermal power plants.

Abstract: Method of storing hydrogen by forming a first ionic liquid by inducing a borohydride in a second ionic liquid comprising a cation and an anion comprising borate, and forming the second ionic liquid by releasing the hydrogen out of the first ionic liquid by using water and/or a catalyst, which method is characterized in that the first and the second ionic liquid are both water miscible and the second ionic liquid is separated, particularly is salted out, from solution in water by adding a separation inducer; certain ionic liquids for storing and releasing hydrogen comprising a borohydride or for preparing a ionic liquid for storing and releasing hydrogen comprising a borate; and a process for preparing ionic liquids for storing and releasing hydrogen comprising a borohydride.

Abstract: A method releases hydrogen by forming a second ionic liquid from a first ionic liquid by releasing hydrogen from the first ionic liquid by exposing the first ionic liquid to water and a catalyst. The first ionic liquid includes a cation and an anion including a borohydride. The release of the hydrogen forms a borate, which makes up the anion of the second ionic liquid. The cation of the first ionic liquid is the same as that of the second ionic liquid. A reaction system includes the first and second ionic liquids, water and a catalyst.