337results about How to "Reduce metal content" patented technology

The present invention relates to dilute fluoride solutions and methods for cleaning plasma etch residue from semiconductor substrates including such dilute solutions. The compositions and methods according to the invention can advantageously provide both cleaning efficiency and material compatibility.

A process for producing aromatics from a hydrocarbon source in the presence of supercritical water comprising the steps of mixing a pressurized, pre-heated water stream with a pressurized, pre-heated petroleum feedstock, the pressurized, pre-heated water stream at a pressure above the critical pressure of water and a temperature above the critical temperature of water, feeding the combined stream to a supercritical water reactor to create a modified stream, cooling and depressurizing the modified stream, separating the depressurized stream in a vapor-liquid separator, condensing the vapor stream, separating the condensed stream into a water recovery stream and a light product recovery stream, extracting the aromatics from the light product recovery stream, depressurizing the liquid stream, separating the depressurized liquid stream in a heavy separator into an upgraded product stream, and recycling part of the upgraded product stream to the pressurized, pre-heated petroleum feedstock as a product recycle.

A downhole tool, such as a fracture plug used during a fracture operation, installs in a downhole tubular, such as casing. The tool has a mandrel with a sealing element disposed thereon between uphole and downhole ends. Slip assemblies on the mandrel can be moved to engage the downhole tubular. The uphole assembly has inserts composed of ceramic material, and the downhole assembly has inserts composed of a metallic material. When the tool is used as a bridge plug, the uphole assembly supports the sealing element compressed, and the downhole assembly supports fluid pressure downhole of the tool. In one particular embodiment, the metallic material is a powdered metal material, such as a sintered-hardened powdered metal steel having a balance of iron, an admixture of carbon, and alloy components of molybdenum, chromium, and manganese.

PCT No. PCT/JP96/00179 Sec. 371 Date Jul. 23, 1997 Sec. 102(e) Date Jul. 23, 1997 PCT Filed Jan. 31, 1996 PCT Pub. No. WO96/24177 PCT Pub. Date Aug. 8, 1996An insulator for high frequency connectors which comprises a thermoplastic norbornene resin and has a voltage and standing wave ratio of 1.89 or less even in the high frequency band of 2-3 GHz, and a high frequency connector using the insulator.

The present invention provides catalyst compositions useful for transamination reactions. The catalyst compositions have a catalyst support that includes transitional alumina, use a low metal loading (for example, less than 25 wt. %), and do not require the presence of rhenium. The catalyst compositions are able to advantageously promote transamination of a reactant product (such as the transamination of EDA to DETA) with excellent activity and selectivity, and similar to transaminations promoted using a precious metal-containing catalyst.

The invention discloses a silicon wafer chemical and mechanical polishing composition with high stability, belonging to the technical field of polishing compositions for roughlly polishing a semiconductor silicon substrate material. The polishing composition comprises the following components in percentage by weight: 0.5-50 percent of silicon dioxide abrasive particles, 0.01-10 percent of silicon-containing stabilizer, 0.01-20 percent of organic alkali corrosive, 0.01 -10 percent of organic acid chelating agent, 0.01-5.0 percent of other functional auxiliaries and the balance of deionized water. The polishing solution has a stabilization period of over 2 years, can perform repeated polishing or cyclic polishing, and has stable pH value and removal speed, wherein the number of cyclic polishing times can be up to 10. Meanwhile, the polishing composition has high silicon wafer removal rate up to over 1.0 mum/min, and the cyclic polishing removal rate in multiple times can be stable. The polishing solution is convenient to prepare and easy to use, has low cost, and is suitable for the rough polishing of silicon wafers of various types and sizes in the semiconductor industry.

The invention is directed to iridium oxide based catalysts for use as anode catalysts in PEM water electrolysis. The claimed composite catalyst materials comprise iridium oxide (IrO₂) and optionally ruthenium oxide (RuO₂) in combination with a high surface area inorganic oxide (for example TiO₂, Al₂O₃, ZrO₂ and mixtures thereof). The inorganic oxide has a BET surface area in the range of 50 to 400 m²/g, a water solubility of lower than 0.15 g/l and is present in a quantity of less than 20 wt. % based on the total weight of the catalyst. The claimed catalyst materials are characterised by a low oxygen overvoltage and long lifetime in water electrolysis. The catalysts are used in electrodes, catalyst-coated membranes and membrane-electrode-assemblies for PEM electrolyzers as well as in regenerative fuel cells (RFC), sensors, and other electrochemical devices.

The reformate olefine saturation hydrogenation method includes the following steps: in the presence of one kind of catalyst making the reformate contact with hydrogen gas, its contact temp. is 200-320 deg.C, contact pressure is not less than 0.7 MPa, liquid hourly space velocity is 1-8 hr (-1), and volume ratio of hydrogen and oil is not less than 30. The described catalyst contains tungsten oxide and/or molybdenum oxide, nickel oxide and cobaltous oxide loaded on the alumina, the catalyst is used as reference, the content of the described tungsten oxide and/or molybdenum oxide is 4 wt% to less than 10 wt%, the content is nickel oxide is 1-5 wt%, the content of cobaltous oxide is 0.01-1 wt% and the ratio of total atomicity of nickel and cobalt and total atomicity of nickel, cobalt, tungsten and/or molybdenum is 0.3-0.9.

The invention discloses a method for producing gelatine powder under normal temperature by using waste tires, which relates to the technical field of producing gelatine powder under normal temperatureby using waste rubber products, and comprises the detailed steps of: a. separating a tire bead; b. crashing the tire; c. separating steel wires; d. magnetically separating for the first time; e. screening for the first time; f. magnetically separating for the second time; g. screening for the second time; and h. screening for the third time. The method has simple technique, is convenient for large-scale industrial production, and has lower investment and production cost; the grain diameter quality of the produced gelatine powder is stable; moreover, the method can produce the gelatine powderwith different grain diameter specifications, thus meeting the demands of different users.

This invention provides a method for smelting lead-containing waste and copper-containing waste synchronously in a molten pool. The method comprises the following steps: (1) mixing the lead-containing waste, the copper-containing waste, one or more fluxes and carbon-containing reducing agents and then pelletizing, wherein the ratio of the lead-containing waste and copper-containing waste is controlled to achieve the effect that the mass ratio of (Cu+Fe):S is (1.75-4):1; (2) adding the mixture to the smelting equipment (i.e. the molten pool), wherein the mass ratio of water-quenched slag to the furnace burden (i.e. the mixture) is (0.7-5):1, and the smelting temperature is 1050-1250 DEG C; (3) keeping the smelting temperature for 30-180 min for separating and clarifying lead alloy, copper matte and smelting slag. According to the invention, the method can be used for treating the lead-containing waste and the copper-containing waste synchronously; the process is efficient and simple; the direct recovery rates of lead and copper can reach above 75% respectively; the metal content of the generated slag is low, and the slag can be used as a building raw material; the extraction and separation of lead, copper and other elements in the wastes can be realized through one step; the lead is concentrated in the lead alloy, and the copper is concentrated in the copper matte; the product additional value is high; the subsequent processing is simple.

A downhole tool, such as a fracture plug used during a fracture operation, installs in a downhole tubular, such as casing. The tool has a mandrel with a sealing element disposed thereon between uphole and downhole ends. Slip assemblies on the mandrel can be moved to engage the downhole tubular. When the tool is used as a bridge plug, the uphole assembly supports the sealing element compressed, and the downhole assembly supports fluid pressure downhole of the tool. The slip assemblies have inserts composed of at least two materials that are different from one another and are geometrically separate from one another. In addition or as an alternative, the slip assemblies can be composed of at least two different materials that are geometrically separate from one another.

A mass-exchange contact device is proposed, comprising: upper and lower flat ring-shaped trays outwardly attached to a column, a sleeve including sidewalls attached to the trays and having windows made therein with bottom edges in the plane of the lower tray, a barbotage unit connected to the top of sleeve and having orifices in its sidewalls, a movable double-acting valve including two upper and lower plates attached to a rod axially disposed therebetween. The top of barbotage unit includes an ascending limiter of valve's movement, the bottom of sleeve includes a descending limiter of the valve's movement. In some embodiments, the barbotage unit is made as a portion of the sleeve. The height of windows preferably is equal to the height of valve. The proposed design significantly improves device operation for a cyclic mode, reliability, durability, reduces its weight and cost, extends its operational range for steam and liquid loads.

The invention discloses a combined process for delayed coking and hydrotreating, which comprises the following steps that: a coking raw material is heated to enter a coking tower to react, oil gas escapes from the top of the coking tower, gas components and liquid components are separated, and the cycle ratio in a coking process is 0; and the liquid components are mixed with hydrogen to react in ahydrogenation reactor, then the obtained hydrogenated reaction effluent is distilled to obtain hydrogenated naphtha, hydrogenated diesel oil and hydrogenated wax oil, and the hydrogenated wax oil used as a high-quality raw material is fed into a catalytic cracking device or a hydrocracking device. By adopting the process flow of zero circulation of a coking device, the method provided by the invention furthest improves the yield of a liquid product, improves the processing depth of heavy oil, saves a coking fractionating tower, and achieves the aims of optimizing the flow and reducing the investment; and by adopting reasonable graduation of a hydrogenation catalyst, the method can furthest take account of the running period and the refining depth of each coking product fraction.