Abstract: The invention relates to a process for producing a paraffin-based object, especially a candle, with a proportion of a perfume that exceeds 10% by weight, in which the perfume is dissolved in a solvent containing an organic ester, and the solution is in turn added to or dissolved in paraffin.

Abstract: The invention relates to a process for producing a paraffinbased object, especially a candle, with a proportion of a perfume, in which the perfume is dissolved in a solvent containing an ester, especially an organic ester, e.g. triglyceride and the solution is in turn added to or dissolved in paraffin.

Abstract: A heat storage medium such as paraffin for a latent heat accumulator (cold accumulator), which solidifies while forming crystal structures. In order to achieve improved responsiveness on heat input, the crystal structures are modified by a structure additive preferably in terms of hollow structures, such as e.g. hollow cones.

Abstract: The invention relates to a process for producing a paraffin-based object, especially a candle, with a proportion of a perfume which exceeds 10% by weight, in which the perfume is dissolved in a solvent containing an organic ester, and the solution is in turn added to or disolved in paraffin.

Abstract: A process for fractional crystallization of paraffin from mineral oil based and synthetic crude paraffin, wherein crude paraffin having a high oil content is crystallized in a crystallizer equipped with perforated metal sheets (31) extending in a zig-zag in the spaces between the heat exchanger surfaces (39). The paraffin-containing melt is only solidified to an extent such that the fractions and oils for discharge remain liquid and are run off without total solidification of the melt. The perforated sheets (31) support the layers of crystals (43) and during sweating the paraffin is detached in strips from the heat exchanger surface (39) and is adapted to rest on the sloping perforated sheets (31). The inclination of the perforated sheets (31) guides and moves the paraffin strips (53), so that the paraffin strips remain in contact with the heat exchanger surfaces (39) while being pressed by their own weight along the inclined surface (30) towards the heat exchanger surfaces (39).

Abstract: A lubricating grease composition of the type wherein mineral or synthetic oil is thickened to the properties of a lubricating grease with a polyurea compound as thickening agent, is provided, along with a method for preparation. The polyurea compound comprises the reaction product of an isocyanate with at least three isocyanate groups in the molecule with a long-chain, straight-chain or branched aliphatic monoamine to give extended temperature and wear properties. The process for the production of this lubricating grease composition involves dissolving the long-chain aliphatic amine or mixture of such amines in the base oil, adding thereto the isocyanate with at least three isocyanate groups, heating the mixture to a temperature of at least 160.degree. to bring about gelling, and mechanically, finely comminuting the gel product.