49results about How to "Achieve a high degree of dispersion" patented technology

The invention discloses a mono-disperse noble metal-loaded single-layer hydrotalcite material as well as a preparation method and application thereof. A series of mono-disperse noble metal-loaded single-layer hydrotalcite materials are synthesized through adjusting and controlling the types of hydrotalcite main body laminates and noble metal ions by virtue of a one-step coprecipitation method. Thematerial presents excellent catalytic activity in dehydrogenation coupling reaction. A catalyst prepared according to the invention is easy to operate, noble metals are in a mono-disperse state, andthe catalyst is low in use cost and can be easily produced and used in large scale.

The invention relates to a boron nitride composite mesoporous oxide nickel-based catalyst and a preparation method thereof. The nano-boron nitride as the carrier having high thermal stability and carbon deposition resistance is combined with active metal anchoring and dispersion based on mesoporous oxides so that the catalytic material having high resistance to sintering and carbon deposition is obtained. The preparation method comprises adding a surfactant and ammonia water into high thermal stability boron nitride and nickel precursors as reactants, carrying out ultrasonic agitation, loading active metal components to the boron nitride nanosheet layer, and carrying out in-situ coating on the surface with an oxide having a mesoporous channel structure. The coated mesoporous structure can realize high dispersion of the active nickel component. Through drying, high temperature calcination and programmed heating reduction, the nickel-based catalyst having high performances and a novel structure is prepared. The boron nitride composite mesoporous oxide nickel-based catalyst has the advantages of simple process, low production cost, no environment pollution and high catalytic efficiency.

The invention relates to a liquid-liquid heterogeneous mixing-reaction-separation integrated short-contact cyclone reactor, belongs the field of liquid-liquid heterogeneous mixing equipment, and particularly relates to a short-contact cyclone reactor integrating mixed reaction and separation. The reactor is characterized in that a light phase liquid inlet pipe (3) is arranged at one side of an outer barrel (4), a material circulating structure (9) for communicating an inner cavity of an inner barrel (5) with an annular cavity is arranged on the wall of the inner barrel (5); a light phase overflow outlet pipe (1) is arranged on the inner upper part of the inner barrel (5) in a sleeving manner, an annular mixing cavity is formed between the light phase overflow outlet pipe (1) and the inner barrel (5), the upper part of the light phase overflow outlet pipe (1) extends out of the inner barrel (5), and a heavy phase underflow out pipe (7) is fixedly arranged on the lower part of the inner barrel (5) in a sleeving manner by a conical pipe (6). According to the invention, the integrated process of quick mixing, quick reaction and quick separation of heterogeneous liquid is realized, the equipment structure is compact, the handling capacity is large, continuous operation is realized, and the reactor has the advantages of being low in maintenance cost and strong in adaptability.