Abstract:
A flowable material, such as a supercooled melt or supersaturated solution, is dispensed onto a take-up member such as a belt or drum. Either prior to, or after being dispensed onto the take-up member, the material is exposed to ultrasound to promote the crystallization of solid substances in the material. All of the material or only a portion of the material can be exposed to ultrasound. If only a portion is exposed, it is later combined with the rest of the material prior to being dispensed onto the take-up member.
Abstract:
After being subjected to a melt crystallization operation, a crystal-containing melt is formed into particles of the same size and shape and then conducted in counter-flow relationship to washing liquid in a washing column. The crystal-containing melt can be formed into particles by a device which deposits the crystal-containing melt as identically sized drops onto a cooling belt. The particles can be completely hardened or only partially hardened when entering the washing column.
Abstract:
A mechanism for making granulated material from a viscous substance includes a vessel charged with the substance and having a discharge opening arrangement for discharging the substance onto a cooling surface. A belt travels across the vessel, the belt having openings arranged to periodically come into alignment with the discharge opening arrangement to allow the substance to fall onto the cooling surface. The discharge opening arrangement comprises a plurality of rows of discharge openings. Each row extends transversely of the longitudinal direction of belt travel, and the rows are spaced apart in that longitudinal direction. The vessel openings of each row are offset in the transverse direction with respect to the vessel openings of other rows. A collection arrangement collects residual substance falling from the belt and returns the substance onto the belt at a location upstream of the vessel.
Abstract:
A pump for fluid media having different temperatures. The pump has two chambers for the two media, respectively, each chamber having an inlet and an outlet each provided with a respective check valve. The chambers are separated by a displacement body whose shape is a function of temperature and which, upon a change in shape due to a change in temperature, changes the sizes of the two chambers. The displacement body is arranged in the two chambers such that initially there is a greater heat exchange between the displacement body and the fluid in one of the chambers than there is between the displacement body and the fluid in the other of the chambers, but that subsequent to the shape change brought about by the heat exchange between the displacement body and the fluid in the one chamber, the heat exchange between the displacement body and the fluid in the other chamber will be greater than the heat exchange between the displacement body and the fluid in the one chamber.
Abstract:
A method for the regeneration of an electrolyte bath used for an electroless metallization process. A partial flow of electrolyte is removed from the process vessel and regenerated by dialysis or electrodialysis. Metallization components are replenished. The partial flow is returned to the process vessel.
Abstract:
Compositions comprising chitosan in the form of a network of nano-sized fibres. There is also provided a process for making such compositions. The compositions have improved solubility and activity. The compositions are useful in hair care, skin care, odour control, wound care, blood management, sanitary compositions, oral care, film formation, hard surface treatment, fabric treatment, release of hydrophobic or hydrophilic materials, plant care, water purification and drug delivery.
Abstract:
Crystallization of a melt is induced by causing the melt to flow downwardly in a gap which is defined by upwardly moving cooled walls so that crystallate adheres to the walls and is carried upwardly for recovery. The walls are formed by endless belts which are cooled by fluid sprayed from nozzles. The walls are adjustable so as to be parallel or upwardly divergent.
Abstract:
A process for the reduction of nitrogen oxides in flue gases and engine exhaust gases is improved by contacting the gases with a zeolite catalyst containing oxides of the transition elements from Periods 4, 5 and 6 of the Periodic Table of Elements or oxides of the rare earths. In particular, faujasite zeolites, mordenites and SiO.sub.2 -rich zeolites are preferred.
Abstract:
An improvement in the removal of nitrogen oxides from the exhaust gases of internal combustion engines is achieved by adding urea or a urea-containing reducing agent to the exhaust gases and contacting the gases under oxidizing conditions with a zeolite containing catalyst.
Abstract:
The disclosed embodiments relate to a power supply network with integrated undervoltage protection for the energised consumers in a passenger aircraft having multiple consumers, with a power supply having multiple output connectors, wherein each consumer is connected to one of the multiple output connectors via a main supply wire, wherein each of the multiple consumers includes at least one individual load, each of which is designed for a predetermined supply voltage range. In order to ensure that the power consumption of individual consumers in a passenger aircraft power supply network is only limited relative to the overall power output to the extent that is absolutely necessary according to the requirements of overriding general conditions, and at the same time to minimise the corresponding weight of the cables in the aircraft, each of the multiple consumers according to the invention includes a voltage sensor for recording the supply voltage and a load controller, wherein the power draw of at least one individual load of the respective consumer is reduced when the supply voltage at the respective consumer falls below the preset minimum value.