Abstract: A valve assembly for a leak resistance drinking cup is selectively configurable between a sealed position and an unsealed position. The valve assembly includes a plug having an inner surface, an outer surface, and an opening extending through the plug from the outer surface to the inner surface. An amount of vacuum acting on the outer surface of the plug needed to move the valve assembly from the sealed position to the unsealed position is less than the amount of internal pressure acting on the inner surface of the plug needed to move the valve assembly from the sealed position to the unsealed position.

Abstract: A lid assembly includes a closure member and a valve assembly. The closure member has a socket in fluid communication with a liquid passageway. The socket has a wall with a cutout therein. The valve assembly includes a plug adapted for insertion into the socket to form a seal between the socket and the plug. The plug has a base, a side wall, and an interior chamber cooperatively defined by the base and the side wall. A portion of the side wall of the plug with a minimum thickness is disposed adjacent the cutout when the plug is inserted into the socket. The seal formed between the plug and socket is selectively moveable from a sealed configuration to an unsealed configuration by vacuum pressure being applied to the interior chamber of the plug.

Abstract: The invention discloses a continuous process for producing high-pure quadricyclane, in which “a reaction-rectification integral process” or “a reaction followed by rectification process” may be employed. The two processes both use a novel composite catalyst which is obtained by loading an organic photo-sensitizer on a solid photocatalyst, and the composite catalyst has a high activity and a good stability. In the reaction-rectification integral process, the composite catalyst is used by being blended with rectification fillers or covering the rectification fillers, so as to achieve the integration of the reaction and the rectification. In the reaction followed by rectification process, the composite catalyst and the rectification fillers are placed separately from each other. The two processes achieve a relatively short residence time of reactants, produce highly-pure quadricyclane, and reduce the formation of cokes.

Abstract: The present invention discloses a composite catalyst for the photocatalytic isomerisation of norbornadiene to prepare quadricyclane, comprising: a solid photocatalyst, selected from the group consisting of TiO2, Ti-MCM-41, Ti-SBA-15, ZnO, WO3, Ta2O5 or SrTiO3; and an organic photo-sensitizer loaded on the surface or in the channel of said solid photocatalyst, selected from benzophenone, acetophenone, Michler's Ketone, tetraethyl Michler's Ketone, and diethyl Michler's Ketone, where the organic photo-sensitizer is present in the solid photocatalyst in an amount of 0.5% to 20% by weight. The catalyst of the invention can catalyze a target reaction under the condition that no solvent is used, and the yield of the target product quadricyclane is higher. Furthermore, the catalyst of the invention has a stable activity, and it can be recycled. The invention further discloses a process for preparing the composite catalyst.