Abstract: The present invention relates to a method of preparing methyl tert-butyl ether including a reaction step of reacting methanol with iso-butene in the presence of an acid catalyst to generate methyl tert-butyl ether; and a purification step of purify the reaction product obtained by the reaction step by introducing the reaction product into a reaction distillation column including a packing stage containing an acid catalyst, wherein a flow ratio of a recycle to a fresh feed is different per the volume of each reactor. Accordingly, the amount of unreacted iso-butene and the amount of impurities included in the reactor may be reduced, resulting in reduction of the amount of thermal energy used in a reaction distillation column.

Abstract: A system for producing phenol and bisphenol A comprising: a first production unit for producing phenol comprising a decomposition reaction unit and a purification unit; a second production unit for producing bisphenol A comprising a reaction unit and a concentration unit; and a removal unit for removing methanol and acetone during the production of phenol and bisphenol A. The removal unit includes a removal column comprising an overhead purge part, a bottom recirculation part and a supply part. The supply part comprises a purification unit discharge part to supply methanol, acetone, and water discharged from the purification unit to the removal column and a concentration unit discharge part to supply phenol, acetone, and water discharged from the concentration unit to the removal column, and is provided to the midsection of the removal column.

Abstract: Disclosed is a method for recovering phenol and acetone from the cracking reaction product of bisphenol-A residue, by which economic feasibility and efficiency may be improved by utilizing a phenol/acetone purification process used for preparing bisphenol-A.

Abstract: A collapsible canopy device includes an assembly including a water-resistant canopy operatively attached to a resilient, flexible metallic band extending around a perimeter of the water resistant canopy, the assembly having attached thereto at least one holder extendible from the assembly, wherein the assembly is reversibly collapsible via twisting and folding the assembly.

Abstract: A mobile terminal includes a communication controller configured to detect a wireless tag in a mobile environment and a wireless charging controller configured to receive power wirelessly, and control the communication controller to determine whether the wireless tag is in the mobile environment, in response to receiving a wake-up power signal from a wireless power transfer apparatus.

Abstract: A non-contact power transmission device includes a power transmission unit configured to contactlessly provide electric power; a controller configured to provide location information of the non-contact power transmission device; and a communications unit configured to transmit the location information and product information received from a non-contact power reception device to a server, and receive an approval to transmit electric power to the non-contact power reception device from the server.

Abstract: There are provided an apparatus for transmitting power wirelessly. The apparatus for transmitting power wirelessly may include a boosting unit boosting an input voltage, and an inverter unit inverting the boosted voltage output from the boosting unit to transmit power wirelessly. The inverter unit and the boosting unit are controlled by the same switching element.

Abstract: Disclosed is a method for recovering phenol and acetone from the cracking reaction product of bisphenol-A residue, by which economic feasibility and efficiency may be improved by utilizing a phenol/acetone purification process used for preparing bisphenol-A.

Abstract: The present application relates to a membrane separation device. According to the separation device of the present application, components to be separated using a separation membrane having a small area size can be separated with high selectivity and consequently processing efficiency and economical efficiency can be superbly improved; and according to a method for producing an expanded polystyrene which includes the membrane separation device, components to be separated using a separation membrane having a small area size, in particular, a volatile organic compound (VOC), can be separated with high selectivity and consequently processing efficiency and economical efficiency can be superbly improved, and also, by separating and recovering VOC, an effect in preventing environmental pollution caused by global warming is exhibited.

Abstract: An antenna device includes a first wiring may include a spiral shape forming an empty region therein, and a second wiring disposed inside or outside of the first wiring. The second wiring is disposed to be spaced apart from the first wiring, and includes a first ring-shaped wiring and a second ring-shaped wiring, which are concentric to each other.

Abstract: A double loop antenna includes a source loop comprising: a spiral-shaped conductive source coil pattern disposed on a top surface of a board, and a source capacitor pattern comprising symmetrical conductive patterns disposed on the top surface and a bottom surface of the board; and a resonance loop comprising: a spiral-shaped conductive resonance coil pattern disposed on the bottom surface of the board, and a resonance capacitor pattern comprising symmetrical conductive patterns disposed on the top surface and the bottom surface of the board, wherein the source coil pattern and the resonance coil pattern are formed on different surfaces of the board.

Abstract: There are provided an apparatus apparatus for transmitting power wirelessly. The apparatus for transmitting power wirelessly may include a boosting unit boosting an input voltage, and an inverter unit inverting the boosted voltage output from the boosting unit to transmit power wirelessly. The inverter unit and the boosting unit are controlled by the same switching element.

Abstract: By using the distillation device of the present application, energy loss occurring in a purification process of a solution including a waste stripper and a stripped photoresist resin used in a stripping process of a photoresist can be minimized and the installation cost of the distillation device can be reduced compared to the case in which dual distillation columns are used, thereby increasing the economic feasibility of a process.

Abstract: A personal life raft includes a rigid compartment, a first flexible arm member in sealed engagement with a first port on a first side of the rigid compartment, a second flexible arm member in sealed engagement with a second port on a second side of the rigid compartment. Each of the first flexible arm member and the second flexible arm member are impervious to water or waterproof such that water does not pass therethrough. The rigid compartment has a body chamber therein having a volume to encompass at least an upper torso of a user of the personal life raft. The rigid compartment displaces sufficient water so that the personal life raft is buoyant while in use by the user.

Abstract: A method of preparing a porous bone substitute is provided. The method includes preparing a ceramic paste including calcium phosphate-based ceramics, preparing a molded article formed of the ceramic paste based on a 3D rapid prototyping method, drying the molded article, and sintering the dried molded article.

Abstract: A wireless charger optimized for charging efficiency of portable terminals (e.g., mobile phones) of different sizes has a housing including within it laterally spaced side supports and a bottom support for cradling an inserted portable terminal. The side supports and the bottom support are interlocked for coordinated movement such that the bottom support is moved by a predetermined amount according to movements of the side supports. This arrangement optimizes relative placement of the charger's transmitting coil and the portable terminal's receiving coil.

Abstract: A personal life raft includes a rigid compartment, a first flexible arm member in sealed engagement with a first port on a first side of the rigid compartment, a second flexible arm member in sealed engagement with a second port on a second side of the rigid compartment. Each of the first flexible arm member and the second flexible arm member are impervious to water or waterproof such that water does not pass therethrough. The rigid compartment has a body chamber therein having a volume to encompass at least an upper torso of a user of the personal life raft. The rigid compartment displaces sufficient water so that the personal life raft is buoyant while in use by the user.

Abstract: There is provided a wireless charging system, including: a wireless power transmitting module including at least one power transmitter transmitting power and at least one wireless power receiving module receiving the power, wherein the wireless power transmitting module controls the power, which is transmitted to the wireless power receiving modules corresponding to the power transmitters, from the power transmitters, depending on targeted voltage gains of the wireless power receiving modules corresponding to the power transmitters.

Abstract: An erasable slate system includes a translucent layer adjacent a colored bottom layer, wherein application of a force to the translucent layer causes temporary adhesion of the translucent layer to the colored bottom layer in an area wherein the force is applied. The erasable slate system further includes an extending channel in fluid connection with the translucent layer and the colored bottom layer. The extending channel extends around at least 25% of the length of a perimeter of the bottom colored layer. The erasable slate system further includes an air pump in fluid connection with the extending channel via which pressurized air can be introduced into the extending channel to cause the translucent layer to be separated from adhesion to the colored bottom layer, thereby erasing markings, and via which air can exit the extending channel of the erasable slate system.

Abstract: A non-contact power transmission device includes a power transmission unit configured to contactlessly provide electric power; a controller configured to provide location information of the non-contact power transmission device; and a communications unit configured to transmit the location information and product information received from a non-contact power reception device to a server, and receive an approval to transmit electric power to the non-contact power reception device from the server.