Patent application number | Description | Published |
20100099799 | PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER - The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer from the reactor; and working-up the superabsorbent polymer removed from the reactor to obtain a final product, whereby a basic aqueous medium comprising carbonate and/or hydrogen carbonate is fed to the superabsorbent polymer gel. | 04-22-2010 |
20100105808 | CONTINUOUS PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER - The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor. | 04-29-2010 |
20100105809 | PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER - The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer gel from the reactor; and drying the superabsorbent polymer gel. Where at least one off-gas stream removed from any stage of the process is subjected to scrubbing with a basic aqueous solution prior to venting to obtain an aqueous scrubber solution that is at least partially recycled to any of the above steps of the process. | 04-29-2010 |
20110245436 | PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER - The present invention relates to process for the preparation of a superabsorbent polymer comprising the steps of a) subjecting an aqueous monomer mixture containing at least one α,β-ethylenically unsaturated monomer; at least one monomer bearing at least two α,β-ethylenically unsaturated groups; iron ions in an amount of 0.1 to 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a mol ratio of chelating agent to iron ion of 0.8 to 4.0 to free radical polymerization in an reactor to obtain a super-absorbent polymer; and b) recovering the superabsorbent polymer, whereby if the process is continuous and is run in an agitated reactor the upper limit of the mol ratio of chelating agent to iron ion is 4.0 for a throughput of total reaction mixture through the reactor of at most 1.3 kg/h per liter reactor volume. | 10-06-2011 |
20120202951 | PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER - The present invention relates to superabsorbent polymer comprising the comprising the free radical polymerization product of an aqueous monomer mixture containing at least one α,β-ethylenically unsaturated monomer; at least one monomer having at least two α,β-ethylenically unsaturated groups; a crosslinking agent having at least two polymerizable double bonds; iron ions in an amount of from about 0.1 to about 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a molar ratio of chelating agent to iron ion of from about 0.8 to about 4.0. | 08-09-2012 |
20120309905 | CONTINUOUS PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER - The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor. | 12-06-2012 |
20140121322 | SUPERABSORBENT POLYMER PROCESS - The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor. | 05-01-2014 |
20140323663 | PROCESS FOR THE CONTINUOUS PREPARATION OF WATER-ABSORBENT POLYMERS - The invention relates generally to a process for the preparation of water-absorbent polymer particles, including the process steps of preparing particulate water-absorbent polymer and mixing the particulate water-absorbent polymer with an aqueous crosslinker solution and heat-treating the mixture of particulate water-absorbent polymer in a horizontally operated mixing device, wherein the horizontally operated mixing device is hydraulically driven. The invention also relates to water-absorbent polymer particles obtainable by such a process. | 10-30-2014 |
Patent application number | Description | Published |
20110273119 | CONTROL DEVICE AND METHOD FOR CONTROLLING AN ELECTRONICALLY COMMUTATED MOTOR, AND MOTOR - The invention relates to a control device for controlling an electronically commutated motor. The control device comprises a control input for a rotor position signal and a control output for connection to field coils of the motor. The control device is designed to generate a load current for displacing a rotor of the motor depending on the rotor position signal and to output said load current via the control output. The control device comprises at least one semiconductor switch for switching the load current depending on a semiconductor control signal. The control device comprises at least one pulse generator including the at least one semiconductor switch, said pulse generator being designed to generate the load current in the form of a pulsed control signal for displacing the rotor. The control device is characterized by a delta sigma converter which is at least indirectly connected to the control input on the input side and which is designed to produce the semiconductor control signal in the form of a digital bit stream depending on the rotor position signal. | 11-10-2011 |
20120274248 | ELECTRONICALLY COMMUTATED ELECTRICAL MOTOR HAVING A CALIBRATED MOTOR TORQUE CONSTANT - The invention relates to an electrically commutated electrical motor having a stator and having an in particular permanent-magnetically designed rotor. The electronically commutated electrical motor also has a control unit which is connected to the stator and designed to actuate the stator for generating a magnetic rotary field. The control unit is designed to detect a voltage induced in at least one stator coil of the stator and to determine a motor torque constant representing an achievable torque in dependence on a rotational speed signal representing a rotor circumferential frequency of the rotor. According to the invention, the control unit in the electronically commutated electrical motor of the aforementioned type is designed to detect a frequency content of the motor torque constant and to actuate the stator for generating a torque in dependence of the frequency content, in particular a frequency amplitude of the motor torque constant. | 11-01-2012 |
20130069574 | METHOD AND APPARATUS FOR DETERMINING A ZERO CROSSING OF A PHASE CURRENT OF AN ELECTRONICALLY COMMUTATED ELECTRICAL MACHINE, IN PARTICULAR FOR DETERMINING A ROTOR POSITION OF THE ELECTRICAL MACHINE - A method for determining a time for a zero crossing of a phase current in a polyphase electrical machine ( | 03-21-2013 |
20130113460 | METHOD OR VOLTAGE DETECTION SYSTEM FOR DETERMINING A CORRECTION PARAMETER FOR A MEASUREMENT CHANNEL AND FOR DETECTING A TERMINAL VOLTAGE OF AN ELECTRIC MOTOR - The invention relates to a method for determining a correction parameter for a measurement channel ( | 05-09-2013 |
20130207647 | METHOD AND DEVICE FOR THE SENSOR-FREE POSITION DETERMINATION OF AN ELECTRONICALLY COMMUTATED ELECTRIC MACHINE - The invention relates to a method for determining a rotor position of a rotatory, multi-phase, electronically commutated electric machine ( | 08-15-2013 |
Patent application number | Description | Published |
20120206116 | ACTIVE VOICE BAND NOISE FILTER - Systems and methods for actively reducing or eliminating conducted noise from power provided to DC circuits include a current sensor, a boost converter, a buck converter, and energy supply capacitors. The current sensor senses the input current provided by the power source. The boost converter increases the voltage level above that provided by the power source while maintaining current at or near the level sensed by the current sensor, and while also maintaining a charge on the energy supply capacitors. The buck converter is powered by the output from the boost converter and provides an output voltage to a load. The operation of the boost converter and the buck converter may be controlled to maintain a continuous and low ripple current from the power source and to maintain a continuous and low ripple voltage to the load. | 08-16-2012 |
20130334890 | Contactless Interconnect - A contactless connector requires no physical contact. A terminated transmitting transmission line on a first board is parallel to a dual-terminated receiving transmission line on a second board. The boards are placed face-to-face with a small air gap in-between. A driver drives a driven pulse onto a first end of the transmitting transmission line. The driven pulse capacitively induces a positive induced pulse on the first end of the receiving transmission line. As the driven pulse travels from the first end to the second end of the transmitting transmission line, energy is transferred to the induced pulse, which travels down the receiving transmission line. Inductive coupling becomes stronger than capacitive as the length increases, so that at the second end, the induced pulse is negative and then swings positive. A Schmitt trigger receiver on the second end of the receiving transmission line detects the signal. | 12-19-2013 |
20130342996 | Electronic Interconnect Method and Apparatus - An electronics chassis has many removable boards on sleds that are interconnected by a honeycomb interconnect structure. Interconnect boards in Y-planes and Z-planes are orthogonal to each other and form cells. Cooling air flows through the cells in an X direction, parallel to surfaces of the interconnect boards. The removable boards have connectors that mate with an edge of Z-divider interconnect boards. Fans blow air through the cells in the honeycomb structure unimpeded since no boards are perpendicular to the airflow. Notches in the rear of the Z-divider boards provide airflow equalization allowing closer spacing of fans to the honeycomb structure. A sled carrier honeycomb structure is placed in front of the honeycomb interconnect structure to guide sleds into position. Sled carrier dividers are offset from the Z-divider boards to allow removable boards to align with Z-divider boards in the Z-planes, parallel to airflow. | 12-26-2013 |
20140098702 | POSITION DISCOVERY BY DETECTING IRREGULARITIES IN A NETWORK TOPOLOGY - Processing nodes in a 3D torus network topology are connected together via an interconnect that introduces at least one irregularity into the link connections between processing nodes of each ring of the network. Each processing node detects whether there is an irregularity in its links with adjacent processing nodes in a ring. As the sockets or other processing node interfaces of the interconnect are wired to introduce this irregularity and as the positions of the processing nodes within a given ring are relative to this irregularity, the physical location of the processing nodes can be determined based on correlations between physical locations of the sockets relative to the irregularity and the positions of the processing nodes relative to the irregularity. Thus, the relative position of a processing node in the ring can be used to identify the socket with which the processing node is coupled, thereby facilitating network management operations. | 04-10-2014 |
20140162470 | DOUBLE-SIDED CIRCUIT BOARD WITH OPPOSING MODULAR CARD CONNECTOR ASSEMBLIES - An electronic assembly includes a circuit board that serves as both a mechanical attachment point and signal conduit for electronic components. The circuit board includes at least two modular card connector assemblies disposed on opposing surfaces of a mounting region of the circuit board. Pin sets of the modular card connector assemblies are connected together via corresponding through holes extending between the opposing surfaces in the mounting region. Further, pins of one or both the modular card connector assemblies may be connected to other electronic components disposed at the circuit board via lateral traces. One or both of the modular card connector assemblies can comprise a modular card socket to removably couple with a modular card. Alternatively, one or both of the modular card connector assemblies comprises a pin interface assembly that is integral to or otherwise fixedly attached to the modular card. | 06-12-2014 |
20140334084 | SERVER SYSTEM WITH INTERLOCKING CELLS - A server system includes an array of server cells. Some or all of the server cells include a set of at least three side panels forming an enclosure and a compute component comprising a processor core. At least one side panel of each server cell is removably mechanically coupled and removably electrically coupled to a facing side panel of an adjacent server cell. The enclosure may form a triangular prism enclosure, a cuboid enclosure, a hexagonal prism enclosure, etc. The enclosure can be formed from a rigid flex printed circuit board (PCB) assembly, whereby the side panels are implemented as rigid PCB sections that are interconnected via flexible PCB sections, with the flexible PCB sections forming corners between the rigid PCB sections when the rigid-flex PCB assembly is folded into the enclosure shape. The compute component and other circuit components are disposed at the interior surfaces of the rigid PCB sections. | 11-13-2014 |
Patent application number | Description | Published |
20100050691 | GLASS MELTING OVEN - A combustion method for melting glass in which two fuels of the same nature or different natures are fed into a fusion furnace at two locations remote from each other for distributing the fuel to reduce NOx emissions. The combustion air is supplied at only one of the locations. In a method for operating a glass melting furnace, the fuel injection is distributed to reduce NOx emissions. The furnace includes a melting vessel for receiving the glass to be melted and containing a bath of molten glass, walls defining the furnace, a hot combustion air inlet, a hot smoke outlet, at least one burner for injecting a first fuel, and at least one injector for injecting a second fuel. The injector has an adjustable flow complementary relative to the flow to the burner so that up to 100% of the totality of the first and second fuels used may be injected. | 03-04-2010 |
20130011805 | PROCESS OF OPERATING A GLASS MELTING OVEN - A combustion method for melting glass in which two fuels of the same nature or different natures are fed into a fusion furnace at two locations remote from each other for distributing the fuel to reduce NOx emissions. The combustion air is supplied at only one of the locations. In a method for operating a glass melting furnace, the fuel injection is distributed to reduce NOx emissions. The furnace includes a melting vessel for receiving the glass to be melted and containing a bath of molten glass, walls defining the furnace, a hot combustion air inlet, a hot smoke outlet, at least one burner for injecting a first fuel, and at least one injector for injecting a second fuel. The injector has an adjustable flow complementary relative to the flow to the burner so that up to | 01-10-2013 |