Abstract: A chemical mechanical polishing system includes a platen to support a polishing pad having a polishing surface, a conduit having an inlet to be coupled to a gas source, and a dispenser coupled to the conduit and having a convergent-divergent nozzle suspended over the platen to direct gas from the gas source onto the polishing surface of the polishing pad.

Abstract: The present disclosure relates to a pad surface cleaning system to be used with a conditioning module to condition a polishing surface of a polishing pad. The pad surface cleaning system may be used to spray the polishing surface with a high-pressure fluid spray to loosen debris from the polishing surface. The pad surface cleaning system may also be used to remove the loosened debris. Further, the pad surface cleaning system may isolate a conditioning disk from a polishing fluid to protect the conditioning disk from reacting with the polishing fluid.

Abstract: The present disclosure discloses an ?-alumina carrier, comprising the elements of lanthanum and silicon both dispersed in the interior and on the surface of the carrier. The mass ratio of the element of lanthanum to the element of silicon is in the range from 0.1:1 to 20:1. The inventors of the present disclosure have made extensive researches into the field of the silver catalyst and alumina carrier thereof, and added the elements of lanthanum and silicon (i.e., bulk phase addition) in preparing the alumina carrier used in the silver catalyst. The carrier thus obtained contains the elements of silicon and lanthanum both in the interior and on the surface thereof, and has improved specific surface area and strength. The silver catalyst prepared with the carrier can react in a low reaction temperature (has a high reaction activity) and has a high selectivity in producing ethylene oxide through oxidation of ethylene.

Abstract: The present invention relates to an alumina support for silver catalyst, a process for preparing said alumina support, a silver catalyst made from said alumina support, and a use of said silver catalyst in the production of ethylene oxide by the oxidization of ethylene. According to the present invention, the silver catalyst made from the support prepared by potassium melt technology can have a high selectivity.

Abstract: The present invention discloses an alumina carrier for a silver catalyst, a process for preparing the alumina carrier, a silver catalyst made from the alumina carrier, and a use of the silver catalyst in the production of ethylene oxide by the oxidization of ethylene. The alumina carrier comprises alumina and promoters, as well as titanium silicate molecular sieve(s); and therefore, has an improved catalytic activity.

Abstract: The present disclosure discloses an ?-alumina carrier, comprising the elements of lanthanum and silicon both dispersed in the interior and on the surface of the carrier. The mass ratio of the element of lanthanum to the element of silicon is in the range from 0.1:1 to 20:1. The inventors of the present disclosure have made extensive researches into the field of the silver catalyst and alumina carrier thereof, and added the elements of lanthanum and silicon (i.e., bulk phase addition) in preparing the alumina carrier used in the silver catalyst. The carrier thus obtained contains the elements of silicon and lanthanum both in the interior and on the surface thereof, and has improved specific surface area and strength. The silver catalyst prepared with the carrier can react in a low reaction temperature (has a high reaction activity) and has a high selectivity in producing ethylene oxide through oxidation of ethylene.

Abstract: The present invention relates to a support for silver catalyst used in the ethylene oxide production, a preparation method for the same, a silver catalyst prepared from the same, and its use in the ethylene oxide production. The silver catalyst produced from the silver catalyst support has an improved activity, stability and/or selectivity in the production of ethylene oxide by epoxidation of ethylene.

Abstract: An alumina support comprises alpha-alumina as the main crystal phase of its backbone, and having a specific surface area of no higher than 3.0 m2/g, a pore volume ranging from 0.3 ml/g to 0.8 ml/g, an alkaline earth metal content ranging from 0.05% to 2.0% by weight of the support, wherein the support has such properties that treating the support with an aqueous oxalic acid solution having a concentration ranging from 0.4% to 2.0% by weight and having twice the weight of the support for 30 minutes can produce a leach liquor having an aluminum content of no higher than 60 ?g/mL, a sodium content of no higher than 20 ?g/mL, and a silicon content of no higher than 40 ?g/mL. Processes for preparing the alumina support, silver catalysts comprising the alumina support, and methods of preparing ethylene oxide by ethylene oxidation using the silver catalyst are also disclosed herein.

Abstract: Disclosed herein is a sealing device disposed between a vehicle door and a vehicle body and a vehicle door sealing rubber strip thereof. The sealing rubber strip is sleeved on a door pipe of the vehicle door. The vehicle door sealing rubber strip is an annular rubber body constituted by a drain segment and a non-drain segment. The annular rubber body includes a hollow rubber ring made of foaming rubber and a groove-shaped rubber ring made of compacted solid rubber and provided with a pipe body mounting groove at the inner side of the groove-shaped rubber ring. An air hole is provided in the hollow rubber ring, and a small water flowing trench is provided at the bottom surface of the pipe body mounting groove of the groove-shaped rubber ring. A fixing groove with a broad bottom and a narrow opening is provided on one external side of the groove-shaped rubber ring.

Abstract: A roof for a recreational vehicle may include a roof frame made by bending circular tubes and a roof plate. The roof plate is connected to the roof frame via a roof plate sealing rubber strip and a frame sealing rubber strip. The roof plate sealing rubber strip covers the peripheral edge of the roof plate through a groove formed at one side of the roof plate sealing rubber strip, and the other side of the roof plate sealing rubber strip is inserted into a slot of the top of the frame sealing rubber strip and is clamped by lips on both sides of the slot, and the frame sealing rubber strip is adhered onto the roof frame.

Abstract: The present invention discloses an alumina carrier for a silver catalyst, a process for preparing the alumina carrier, a silver catalyst made from the alumina carrier, and a use of the silver catalyst in the production of ethylene oxide by the oxidization of ethylene. The alumina carrier comprises alumina and promoters, as well as titanium silicate molecular sieve(s); and therefore, has an improved catalytic activity.

Abstract: Disclosed herein is a vehicle door with an irregular-circular frame for a recreational vehicle. A door window glass of the vehicle door includes a fixed glass (2) and a movable glass (1). The fixed glass (2) is fixedly installed in a portion of the door window surrounded by a lower door body (6), an outer frame (5) and a movable glass guide rail (9). The movable glass guild rail (9) has an arc rail. The movable glass (1) is installed on the lower door body (6) at the center of the arc of the movable glass guide rail (9) via a shaft sleeve and a shaft (4). A lock member (3) with a lock pin is installed on the upper part of the portion where the movable glass (1) engages with the movable glass guide rail (9). A stop block for adjusting the opening degree of the movable glass and stopping the lock pin of the lock member (3) is provided on the movable glass guide rail (9).

Abstract: Disclosed herein is a sealing device disposed between a vehicle door and a vehicle body and a vehicle door sealing rubber strip thereof. The sealing rubber strip is sleeved on a door pipe of the vehicle door. The vehicle door sealing rubber strip is an annular rubber body constituted by a drain segment and a non-drain segment. The annular rubber body includes a hollow rubber ring made of foaming rubber and a groove-shaped rubber ring made of compacted solid rubber and provided with a pipe body mounting groove at the inner side of the groove-shaped rubber ring. An air hole is provided in the hollow rubber ring, and a small water flowing trench is provided at the bottom surface of the pipe body mounting groove of the groove-shaped rubber ring. A fixing groove with a broad bottom and a narrow opening is provided on one external side of the groove-shaped rubber ring.

Abstract: Herein disclosed is a roof for a recreational vehicle including a roof frame made by bending circular tubes and a roof plate. The roof plate is connected to the roof frame via a roof plate sealing rubber strip and a frame sealing rubber strip. The roof plate sealing rubber strip covers the peripheral edge of the roof plate through a groove formed at one side of the roof plate sealing rubber strip, and the other side of the roof plate sealing rubber strip is inserted into a slot of the top of the frame sealing rubber strip and is clamped by lips on both sides of the slot, and the frame sealing rubber strip is adhered onto the roof frame. Compared with a conventional roof for a recreational vehicle, such roof for a recreational vehicle according to the present invention can solve the problem that the roof frame made of circular tubes and the roof plate cannot be flushed with each other and the problem of the leakage of rain.

Abstract: Disclosed herein is a vehicle door with an irregular-circular frame for a recreational vehicle. A door window glass of the vehicle door includes a fixed glass (2) and a movable glass (1). The fixed glass (2) is fixedly installed in a portion of the door window surrounded by a lower door body (6), an outer frame (5) and a movable glass guide rail (9). The movable glass guild rail (9) has an arc rail. The movable glass (1) is installed on the lower door body (6) at the centre of the arc of the movable glass guide rail (9) via a shaft sleeve and a shaft (4). A lock member 3 with a lock pin is installed on the upper part of the portion where the movable glass 1 engages with the movable glass guide rail (9). A stop block for adjusting the opening degree of the movable glass and stopping the lock pin of the lock member (3) is provided on the movable glass guide rail (9).

Abstract: An alumina support comprises alpha-alumina as the main crystal phase of its backbone, and having a specific surface area of no higher than 3.0 m2/g, a pore volume ranging from 0.3 ml/g to 0.8 ml/g, an alkaline earth metal content ranging from 0.05% to 2.0% by weight of the support, wherein the support has such properties that treating the support with an aqueous oxalic acid solution having a concentration ranging from 0.4% to 2.0% by weight and having twice the weight of the support for 30 minutes can produce a leach liquor having an aluminum content of no higher than 60 ?g/mL, a sodium content of no higher than 20 ?g/mL, and a silicon content of no higher than 40 ?g/mL. Processes for preparing the alumina support, silver catalysts comprising the alumina support, and methods of preparing ethylene oxide by ethylene oxidation using the silver catalyst are also disclosed herein.

Abstract: The present invention relates to an alumina support for silver catalyst, a process for preparing said alumina support, a silver catalyst made from said alumina support, and a use of said silver catalyst in the production of ethylene oxide by the oxidization of ethylene. According to the present invention, the silver catalyst made from the support prepared by potassium melt technology can have a high selectivity.

Abstract: The present invention relates to a support for silver catalyst used in the ethylene oxide production, a preparation method for the same, a silver catalyst prepared from the same, and its use in the ethylene oxide production. The silver catalyst produced from the silver catalyst support has an improved activity, stability and/or selectivity in the production of ethylene oxide by epoxidation of ethylene.

Abstract: Water-based adhesives specifically formulated for the application of transparent plastic labels onto glass substrates. The adhesive film has a clear, transparent appearance and leaves a no-label look on the bottle to which the label has been applied.