摘要:
A multi-layered structure in the form of a disposable patch is described for supporting a light source and useful in conjunction with procedures for the non-invasive visualization of veins, arteries or other subcutaneous structures of the body or for facilitating intravenous insertion or extraction of fluids, medication or the like, which in a representative embodiment includes a coupling layer for interfacing and optically coupling with the body surface and conforming to the surface topography of the body portion of interest, a ring for supporting a light source, and a reflective layer between the source and coupling layer for redirecting light reflected from the body surface back through the coupling layer.
摘要:
In a process for converting C9+ aromatic hydrocarbons to lighter aromatic products a feed comprising C9+ aromatic hydrocarbons is contacted under transalkylation reaction conditions with a catalyst composition comprising (i) a first molecular sieve selected from the group consisting of ZSM-12, mordenite and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07; and (ii) a second molecular sieve having a constraint index ranging from 3 to 12. At least the first molecular sieve has a hydrogenation component associated therewith and the first and second molecular sieves are contained in the same catalyst bed. The C9+ aromatic hydrocarbons are converted under the transalkylation reaction conditions to a reaction product containing xylene.
摘要:
A gasoline engine having an exhaust system comprises means for trapping particulate matter (PM) from the exhaust gas and a catalyst for catalysing the oxidation of the PM by carbon dioxide and/or water in the exhaust gas, which catalyst comprising a supported alkali metal. The invention further includes a method of combusting PM from a gasoline engine in CO2 and/or H2O from the exhaust gas at temperatures in excess of 500 ° C., which method comprising trapping the PM and contacting it with a catalyst comprising a supported alkali metal.
摘要:
An oligomerization process in which hydrocarbon feedstocks are contacted with a hydrotreating catalyst in the absence of hydrogen and in the liquid phase. The catalyst is a heterogeneous catalyst selected from supported reduced metals, metals oxides, metal sulfides and combinations thereof. Preferred catalysts include mixed nickel and molybdenum oxides or mixed cobalt and molybdenum oxides. The process also oligomerizes sulfur compounds so that sulfur containing feedstocks can be treated without deactivating the catalysts.
摘要:
A process is provided for the production of xylenes from reformate. The process is carried out by methylating under conditions effective for the methylation, the benzene/toluene present in the reformate outside the reforming loop, to produce a resulting product having a higher xylenes content than the reformate. Greater than equilibrium amounts of para-xylene can be produced by the process.
摘要:
A cyclic cable pulling machine includes a reaction plate having a flat front face, a frame secured to the reaction plate and a cable pulling mechanism including a hydraulic cylinder and a cable gripping mechanism, the cable gripping mechanism having jaws positioned to engage the cable during a pulling stroke, the hydraulic cylinder having an end abutting the reaction plate and an opposite end secured to the cable gripping mechanism for movement of the cable gripping mechanism away from the reaction plate during a pulling stroke and a powered clamping device attached to the frame which holds the cable during return movement of the cable pulling mechanism.
摘要:
In a process for preparing a selectivated catalyst composition useful in the disproportionation of toluene, a catalyst comprising an acidic molecular sieve is contacted with a boron compound at a temperature in excess of 500° C.; and the resultant catalyst is then contacted with a medium containing hydrogen ions to at least partially restore the acid activity of the molecular sieve.
摘要:
A safety harness and tool belt is composed of a safety body harness and a tool belt carried by the harness. The harness comprises a waist strap, a single back strap extending from a shoulder apex downward in two segments, the segments being adapted to extend through the wearer's crotch to support the wearer in fall arrest, a single shoulder strap loosely engaging the back strap at its shoulder apex and extending from the shoulder apex over the wearer's shoulders in two chest segments to allow free shoulder movement, a pair of chest straps each connectable to one of the shoulder strap segments and to one of the back strap segments at the front of the wearer's torso so that the back strap is connectable to the shoulder strap chest segments to define a fall arrest sling that extends across the wearer's chest, shoulders and back and between the wearer's legs, and around a wearer's waist. The tool belt comprises at least a waist band connected to the harness waist strap and may also include tool pouches detachably mounted to the waist band.
摘要:
A pneumatic ground piercing tool according to the invention has a reversing mechanism provided as part of the air distributing mechanism. Such a tool includes an elongated tubular housing having a rear opening, a head assembly including an anvil, a striker disposed for reciprocation within an internal chamber of the housing to impart impacts to a rear impact surface of the anvil for driving the body through the ground, an air distributing mechanism for effecting reciprocation of the striker, and a tail assembly mounted in a rear end opening of the housing that secures the striker and air distributing mechanism in the housing. In one embodiment, the outer bushing of the valve sleeve can slide a short distance relative to the air supply tube and has an intermediate radial port which selectively communicates with the air supply conduit. The valve sleeve also includes a detent mechanism for securing the air supply tube in its forward or reverse position. A biasing device such as an resilient tube biases the detent mechanism to an unlocked position when the compressed air is off, and is overcome by air pressure so that the detent assumes a locked position when the compressed air is on.