59results about How to "High surface area" patented technology

Elastomer composite blends and methods-II

InactiveUS7105595B2High surface areaLow structureFlow mixersSpecial tyresChemistryMixing zone
Elastomer composite blends are produced by novel wet/dry mixing methods and apparatus. In the wet mixing step or stage, fluid streams of particulate filler and elastomer latex are fed to the mixing zone of a coagulum reactor to form a mixture in semi-confined flow continuously from the mixing zone through a coagulum zone to a discharge end of the reactor. The particulate filler fluid is fed under high pressure to the mixing zone, such as to form a jet stream to entrain elastomer latex fluid sufficiently energetically to substantially completely coagulate the elastomer with the particulate filler prior to the discharge end. Highly efficient and effective elastomer coagulation is achieved without the need for a coagulation step involving exposure to acid or salt solution or the like. Novel elastomer composites are produced. Such novel elastomer composites may be cured or uncured, and combine material properties, such as choice of filler, elastomer, level of filler loading, and macro-dispersion, not previously achieved. The coagulum produced by such wet mixing step, with or without intermediate processing steps, is then mixed with additional elastomer in a dry mixing step or stage to form elastomer composite blends. The additional elastomer to the coagulum may be the same as or different from the elastomer(s) used in the wet mixing step.

Hydrocracking catalyst for preparing fuel oil from coal tar and preparation and application methods thereof

The invention provides a novel hydrocracking catalyst special for coal tar and a preparation method and an application method thereof aiming at the problems of the conventional coal tar hydrocracking catalyst. The hydrocracking catalyst consists of active ingredients, an aid and a carrier, wherein the active ingredients of the hydrocracking catalyst consist of WO3 and NiO, the aid is ReO, and the carrier consists of activated alumina, zeolite and BaO; and the active ingredients and the aid respectively account for 14 to 34 percent and 0.4 to 1.2 percent of the total mass of the catalyst based on an oxide form. The method for preparing the catalyst comprises the following steps of: preparing the carrier, pretreating the carrier, impregnating, performing catalyst post-treatment and the like; and the catalyst preparation conditions are strictly controlled by introducing novel ultrasonic impregnation technology. Compared with the prior art, the catalyst is excellent in surface physicochemical properties, has good aromatic hydrocarbon saturated activity and proper cracking activity, and excellent high-temperature resistance and compression resistance, and effectively improves the quality and yield of hydrotreated product oil.

Method for preparing nanoporous carbons with enhanced mechanical strength and the nanoporous carbons prepared by the method

The present invention relates to a method for preparing nanoporous carbons with enhanced mechanical strength and the nanoporous carbons prepared by the method, and more specifically, to a method for preparing a nanoporous carbon, comprising the steps of (i) synthesizing a mesoporous silica template not being subjected to any calcination process; (ii) incorporating a mixture of a monomer for addition polymerization and initiator, or a mixture of a monomer for condensation polymerization and acid catalyst into the as-synthesized mesoporous silica template, and reacting the mixture to obtain a polymer-silica composite; and (iii) carbonizing the polymer-silica composite at a high temperature to obtain a carbon-silica composite, from which the silica template is then removed using a solvent.
According to the preparation method of the present invention, the nanoporous carbons having uniform size of mesopores, high surface area and high mechanical stability can be prepared at low preparation cost through a simplified preparation process. Therefore, the nanoporous carbons of the present invention can be used as catalysts, catalyst supports, separating agents, hydrogen reserving materials, adsorbents, membranes and membrane fillers in various application fields.

Nano fiber artificial blood vessel for catalyzing and releasing nitric oxide and preparation method

The invention discloses a nano fiber artificial blood vessel for catalyzing and releasing nitric oxide and a preparation method. The artificial blood vessel consists of a three-dimensional reticular non-woven film pipe structure formed by an inner layer and an outer layer of nano fibers. The artificial blood vessel is prepared by the following method comprising the following steps of: dissolving gelatin in glacial acetic acid to prepare a solution; adding a sodium heparin aqueous solution to prepare a spinning dope for electrostatic spinning to form nano fiber non-woven film pipes; dissolving polyurethane and nantokite chelate in a mixed solution of tetrahydrofuran and N,N-dimethyl fomamide to prepare a polyurethane spinning dope; carrying out electrostatic spinning to continue collecting polyurethane fibers on a collecting roller with the nano fiber non-woven film pipes so as to form polyurethane fiber non-woven film pipes; and soaking and treating the polyurethane fiber non-woven film pipes in an aqueous solution of a crosslinking agent. The artificial blood vessel can catalyze and release nitric oxide for a long time in vivo and in vitro and is beneficial to inhibiting the aggregation of platelets. The preparation method is simple, and the crosslinking degree is easy to control.
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