摘要:
process for producing an alkylated aromatic product in a reactor by reacting an alkylatable aromatic compound feedstock with another feedstock comprising alkene component and alkane component in a reaction zone containing an alkylation catalyst. The reaction zone is operated in predominantly liquid phase without inter-zone alkane removal. The polyalkylated aromatic compounds can be separated as feed stream for transalkylation reaction in a transalkylation reaction zone.
摘要:
Wall mount assemblies operable to be mounted to a building are described. The wall mount assemblies include a base having a front surface and a rear surface and having a wall extending about an outer periphery and inwardly from the rear surface. The base also includes at least one edge recessed rearwardly from the front surface defining a recessed portion therein. The edge of the recessed portion also defines mounting apertures and/or mounting holes spaced about the recessed portion. An annular flange extends rearwardly from the recessed portion. A cover member mounts to either one of the mounting apertures and the mounting holes for creating an aesthetic appearance.
摘要:
Disclosed herein is a process and catalyst for producing a monoalkylated aromatic compound from a polyalkylated aromatic compound, comprising the step of contacting an alkylatable aromatic compound with a polyalkylated aromatic compound under at least partial liquid phase conditions in the presence of a zeolite beta catalyst having a phosphorus content in the range of 0.001 wt. % to 10.0 wt. % of said catalyst, to provide a product which comprises a monoalkylated aromatic compound.
摘要:
A saw table includes a clamping mechanism for clamping a work piece on the saw table. The clamping mechanism includes a clamping bar having a first end and a second end. A longitudinal axis is defined between the first and second ends. A first pivoting arm is operatively connected to one of the ends of the clamping bar to support the clamping bar for rotation about a pivot axis. A biasing device biases the clamping bar about the pivot axis to clamp the work piece between the clamping bar and a table base.
摘要:
A shutter assembly (24) mounts to a structure (20) and provides storm and security protection to an opening (22). The assembly comprises an upper track (28) and a lower track (30) each extending between first and second proximal and distal ends (34, 38), respectively. A pair of decorative shutters (26) are spaced from one another and disposed adjacent to the tracks (28, 30). A plurality of panel assemblies (46) are in sliding engagement with the upper and lower tracks (28, 30) for covering the opening (22) and each comprises upper and lower rails (52, 54) and a pair of stiles (56) extending therebetween and a panel (58). The panel (58) defines a retention portion (66) disposed along side edges (64) extending outwardly from a plane (68) of the panel (58). Each of the stiles (56) define a stile channel (72) having a configuration corresponding to the retention portion (66) to create an interference fit between the stile channel (72) and the panel (58) for allowing movement when the panel (58) flexes.
摘要:
A portable hand tool includes a frame for guiding a sheet of material, e.g., sheet metal. A pair of shafts are spaced from each other and are selectively slideable relative to the frame to define a plurality of adjustment positions. A pair of rollers are respectively mounted to the shafts for deforming the sheet of material between the rollers. An adjustment rod is mounted to and extends outwardly from the frame. A support interconnects the shafts and an adjustment device is rotatably engaged with the support. A coupling device is disposed about the adjustment rod and is moveable between an engaged position and a disengaged position. In the engaged position, the coupling device couples the adjustment rod and the adjustment device to lock the shafts and rollers laterally relative to the frame. In the disengaged position, the shafts and rollers are slideable relative to the frame between the adjustment positions.
摘要:
A vent apparatus for cooperating with duct work associated with an exhaust fan to enable air to be exhausted from an interior room of a dwelling to the exterior environment. The vent apparatus includes a base member and a cover member releasably securable to the base member. The base member includes an attaching portion having a plurality of locking portions, while the cover member includes a plurality of flexible latching arm members which releasably engage the locking portions when the cover member is placed over the attaching portion. The attaching portion includes an enlarged opening which enables air exhausted from an interior room to be directed out between the base and cover members to the exterior atmosphere. The apparatus is particularly well-adapted to be used with vinyl or aluminum siding and is relatively inexpensive to construct, light-weight and easy to install. In an alternative embodiment, the apparatus includes a screen adapted to be secured to the base member. The screen has dimensions which enable it to fit within the cover member so as not to be visible once the cover is installed on the base member. The screen prevents insects and small mammals from entering through the base member. The screen is secured to the base member via a plurality of locking arm members which engage within openings formed in the base member such that the screen can be “snapped” onto the base member without special tools or external fastening elements such as threaded screws or the like.
摘要:
Improved isoparaffin-olefin alkylation solid catalyst processes are provided which are characterized by low coke laydown and catalyst deactivation rates and production of valuable branched chain, high octane number alkylates. The processes of the invention involve providing a starting reactant mixture comprising an isoparaffin, an olefin and a co-solvent or diluent (carbon dioxide in molar excess, methane, hydrogen or mixtures thereof), and contacting the reactant mixture with an alkylation catalyst at near-critical or preferably supercritical conditions for the reaction mixture. The carbon dioxide serves as a co-solvent and reduces the critical temperature (T.sub.c) of the reaction mixture, thereby allowing lower reaction temperatures. The isoparaffin and olefin reactants are preferably pretreated to minimize moisture, peroxide and oxygenate impurities therein.
摘要:
A molding assembly having a hanger member fixedly securable to an inner or outer wall of a building and a decorative molding insert member releasably engageable with the hanger member. The molding insert member is supported at a lower edge portion by a lower J-channel of the hanger member. An upper L-shaped portion of the insert member is supported by a depending lip portion of the hanger member which forms a second channel such that no external fastening elements are required to secure the molding insert member to the hanger member. The insert member can be quickly and easily releasably engaged within the J-channel and the second channel without the need for special tools. In an alternative preferred embodiment the insert member includes a lip portion which is adapted to slidably engage an under surface of an adjacently positioned insert member to provide an even more continuous appearance for adjacently positioned insert members. An end cover is also disclosed for covering an exposed end portion of the molding assembly when the end portion is secured to a section of a wall where one or more ends of the molding assembly do not abut another wall portion extending perpendicularly from the molding assembly. In an alternative embodiment of the end cover, the end cover includes a shoulder portion formed to protrude from a lower lip portion which engages a notch formed in a lip of a lower J-channel of a hanger member of the present invention. In this manner, once the end cover is releasably secured to the hanger member, the end cover cannot be slidably urged-off of the hanger member such as by thermal expansion of one or more sections of molding insert members.
摘要:
A molding assembly having a hanger member fixedly securable to an inner or outer wall of a building and a decorative molding insert member releasably engageable with the hanger member. The molding insert member is supported at a lower edge portion by a lower J-channel of the hanger member. An upper L-shaped portion of the insert member is supported by a depending lip portion of the hanger member which forms a second channel such that no external fastening elements are required to secure the molding insert member to the hanger member. The insert member can be quickly and easily releasably engaged within the J-channel and the second channel without the need for special tools. In an alternative preferred embodiment the insert member includes a lip portion which is adapted to slidably engage an under surface of an adjacently positioned insert member to provide an even more continuous appearance for adjacently positioned insert members. An end cover is also disclosed for covering an exposed end portion of the molding assembly when the end portion is secured to a section of a wall where one or more ends of the molding assembly do not abut another wall portion extending perpendicularly from the molding assembly. In an alternative embodiment of the end cover, the end cover includes a shoulder portion formed to protrude from a lower lip portion which engages a notch formed in a lip of a lower J-channel of a hanger member of the present invention. In this manner, once the end cover is releasably secured to the hanger member, the end cover cannot be slidably urged-off of the hanger member such as by thermal expansion of one or more sections of molding insert members.