Abstract:
The gas-phase fluorination of plastic articles is effected in a reaction chamber 1 into which the plastic articles to be fluorinated are introduced. The gas-phase fluorination is effected at normal or atmospheric ambient pressure of about 1 kPa in the reaction chamber. The gas-phase fluorination can be carried out statically or dynamically. The flushing carried out before the gas-phase fluorination for complete or partial removal of atmospheric oxygen from the reaction chamber 1 can also be effected at atmospheric pressure in the reaction chamber. The reaction chamber 1 is equipped with a cover 2 and metering valves V0, V1, V2 for air, inert gas and gas mixture comprising fluorine and one or more inert gases are present on the entrance side of the reaction chamber, which is not vacuum-tight and hence also cannot be evacuated. The metering valves are connected to the reaction chamber 1 via a flow meter 4. A release valve V3 and a flow-through/shut-off valve V4 are arranged in an exhaust gas line 8 of the reaction chamber 1.
Abstract:
A method for dispensing liquid for use in biological analysis may comprise positioning liquid to be dispensed via electrowetting. The positioning may comprise aligning the liquid with a plurality of predetermined locations. The method may further comprise dispensing the aligned liquid from the plurality of predetermined locations through a plurality of openings respectively aligned with the predetermined locations. The dispensing may be via electrowetting.
Abstract:
A process is described for converting and utilizing oxygen-containing polymers to form hydrogen and alkali metal carbonates, in which the polymers are brought into intimate contact with a melt mixture of alkali metal hydroxide and alkali metal carbonate to form hydrogen and alkali metal carbonate, and the alkali metal carbonate formed is removed from the reaction mixture during the reaction and alkali metal hydroxide is optionally metered in. The reaction is preferably carried out under conditions which lie on a point on the Liquidus line of the system. It is possible in accordance with the invention to process natural or synthetic polymers, for example polyester, polyether, wood, etc. It is particularly suitable for processing fiber-reinforced composite materials. Also described is an apparatus for performing the process according to the invention.
Abstract:
Process for the preparation of ethylene homopolymers or copolymers in a high pressure reactor with at least two spatially separated initiator injection points by polymerizing ethylene and optionally further monomers in the presence of at least two different mixtures of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa, wherein the process comprises the following steps: a) providing at least two different initiators as solution in a suitable solvent or in liquid state, b) mixing the initiators and optionally additional solvent in at least two static mixers and c) feeding each of the mixtures to a different initiator injection point of the high pressure reactor, and apparatus for feeding initiator mixtures to a high pressure reactor with at least two spatially separated initiator injection points.
Abstract:
Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa in a tubular reactor with at least two spatially separated initiator injection points, wherein injecting initiator rises the temperature of the reaction mixture in the reaction zone following the injection point, and the first initiator injection point of the tubular reactor is not provided with initiator or is provided with so little initiator that the temperature of the reaction mixture does not rise more than 20° C. in the first reaction zone and method for reducing the output of a high pressure tubular reactor for the homo- or copolymerization of ethylene in the presence of free-radical polymerization initiators with at least two initiator injection points, wherein feeding of free-radical polymerization initiator to the first initiator injection point is discontinued or reduced to a level that the temperature of the reaction mixture in the first reaction zone does not rise more than 20° C.
Abstract:
The current invention relates to an apparatus for the production of stable oxy-chloro acid while monitoring the efficacy of the resin bed. The invention allows for simple ion exchange while modifying the pH to allow the chlorous acid to be in a stable form so that it does not rapidly degrading into chlorine dioxide and can be used as an effective biocide and cleaning composition. The apparatus also provides for an uninterrupted production of chlorous acid, which allows for the use of chlorous acid to be used in batch or continuous cleaning treatments.
Abstract:
A hydrogen supply system includes at least a hydrogen supply device for supplying hydrogen to a hydrogen storing device, and a hydrogen generating device producing hydrogen containing gas to be supplied to the hydrogen supply device. The hydrogen generating device produces the hydrogen containing gas by decomposing a fuel containing an organic compound, and includes a partition membrane, a fuel electrode provided on one surface of the partition membrane for generating hydrogen containing gas, a device for supplying a fuel containing the organic compound and water to the fuel electrode, an oxidizing electrode provided on the other surface of the partition membrane, a device for supplying an oxidizing agent to the oxidizing electrode, and a device for collecting the hydrogen containing gas directly from the fuel electrode.
Abstract:
Fuel supplies for fuel cells are disclosed. The fuel supplies can be a pressurized or non-pressurized cartridge that can be used with any fuel cells, including but not limited to, direct methanol fuel cell or reformer fuel cell. In one aspect, a fuel supply may contain a reaction chamber to convert fuel to hydrogen. The fuel supplies may also contain a pump. The fuel supply may have a valve connecting the fuel to the fuel cell, and a vent to vent gas from the fuel supply. Methods for forming various fuel supplies are also disclosed.
Abstract:
Fuel supplies for fuel cells are disclosed. The fuel supplies can be a pressurized or non-pressurized cartridge that can be used with any fuel cells, including but not limited to, direct methanol fuel cell or reformer fuel cell. In one aspect, a fuel supply may contain a reaction chamber to convert fuel to hydrogen. The fuel supplies may also contain a pump. The fuel supply may have a valve connecting the fuel to the fuel cell, and a vent to vent gas from the fuel supply. Methods for forming various fuel supplies are also disclosed.
Abstract:
A flash chamber sized to receive the effluent discharged from a polyolefin reactor during normal operation of the reactor and during a reactor dump, advantageously eliminating a reactor dump tank or alternate flash tank from the equipment outlay of a polyolefin manufacturing process. The flash chamber is sized to hold at least the polyolefin solids discharged from the reactor. A condenser fluidically coupled to an overhead portion of the flash chamber is sized to condense the flow rate of vaporized hydrocarbon (e.g., diluent, monomer, etc.) discharged overhead from the flash chamber during normal operation and during the reactor dump.