14results about How to "Improve dispersion" patented technology

The present application belongs to the technical field of biomass catalytic conversion, and particularly relates to a method for preparing polyols by hydrogenation of furfural and its derivatives. The method comprises the following steps: taking furfural and its derivatives as raw materials, hydrogen as hydrogen source, and simultaneously adding a catalyst La2CuO4 / Cu to perform ring-opening reaction to obtain polyols. The catalyst La2CuO4 / Cu has excellent catalytic activity in the reaction of hydrogenation conversion of furfural and its derivatives into polyols, has high activity and selectivity for the rupture of C-O bonds of reactants, improves the yield of polyols, and has mild reaction conditions, realizes recovery and long-time use without deactivation of the catalyst, and reduces the utilization cost.

The present application relates to the technical field of seeding, in particular to a kind of air blowing seed disturbing type air suction type peanut seed metering method, comprising the following steps: seed enters seed chamber mechanism, the strain signal of corresponding detection area is collected by strain gauge, and the equivalent pile seed pressure response value of each detection area is constructed;The strength index, bias index and growth index of various piles are calculated;The target rotation angle of corresponding jet head is calculated, and the target jet frequency of corresponding jet head is calculated;The target rotation angle is converted into the rotation pulse number and rotation angle of corresponding motor, and the directional seed disturbing of jet head is driven to aim at corresponding seed pile position, so that seed is in suspended state;When seed suction mechanism carries peanut seed from negative pressure area to non-negative pressure area, peanut seed realizes seed dropping.This application detects the state of seed pile by strain gauge, realizes the automatic adjustment of jet head rotation angle and jet frequency, so that jet seed disturbing can actively aim at seed gathering area and implement directional disturbance, improve seed metering accuracy.

The invention relates to the field of hydrogenation catalysts, and discloses a preparation method of a hydrogenation catalyst, the hydrogenation catalyst and application thereof, and a production method of an aromatic extraction raw material. The invention relates to a preparation method of a hydrogenation catalyst, which comprises the following steps: (1) loading nickel and alkali metal and / or alkaline earth metal onto a carrier, and then roasting to obtain a modified carrier; (2) loading cobalt, molybdenum and a first organic matter on the modified carrier, and then carrying out hydrothermal treatment and first post-treatment to obtain a catalyst precursor; and (3) loading a second organic matter on the catalyst precursor, and then carrying out hydrogenolysis post-treatment to obtain the catalyst. According to the method, the loading sequence of the active metal is modulated, the stability of the catalyst is improved, the electronic characteristic adjusting effect of alkali metal is utilized, and organic matter is introduced while the active metal is subsequently impregnated, so that the active metal can be better dispersed on a carrier, and better combination between the active metal is realized.

This invention relates to the field of intestinal health regulation technology, and discloses a method for preparing and applying a composition containing *Anoectochilus roxburghii* (a type of orchid) to improve intestinal health. The composition, by weight, includes the following components: 8-25 parts of *Anoectochilus roxburghii* complex extract, 5-20 parts of fermented *Anoectochilus roxburghii* prebiotics, 20-60 parts of complex prebiotics, and 1-10 parts of pre-adapted probiotic powder. The *Anoectochilus roxburghii* complex extract is composed of *Anoectochilus roxburghii* polysaccharide fraction and *Anoectochilus roxburghii* alcohol extract composite fraction. The alcohol extract composite fraction is a complex formed by the alcohol extract of *Anoectochilus roxburghii* and phospholipids. The mass ratio of the alcohol extract composite fraction to the polysaccharide fraction is 1:(1-4). This invention overcomes the technical problems of low utilization rate of *Anoectochilus roxburghii* active ingredients, poor probiotic environmental tolerance, and limited dispersibility of active substances in existing intestinal health improvement products. This invention constructs a composite system that combines improved utilization of active ingredients, enhanced stability of live bacteria, and improved overall intestinal health improvement capabilities.

The utility model belongs to papermaking technical field, concretely relates to an improved high -efficient double roll pulp washer, including pulp washing bin and with the support platform that connects with pulp washing bin, the side of pulp washing bin is installed with drive motor, and the output fixed with the first drive link of the rotary connection of pulp washing bin of drive motor, the outside fixed with the first spur gear of first drive link, the outside meshing connection has the second spur gear of first spur gear, the inside rotary connection has the cylinder of fixed connection with pulp washing bin of second spur gear, the outside of second spur gear is connected with third spur gear through the belt, and the inside fixed with the second drive link of rotary connection of pulp washing bin of third spur gear, the end of first drive link away from drive motor and located pulp washing bin inside installation has upper roll. The utility model reduces solid -liquid separation loss due to the nonuniformity of feeding through the pre -treatment of slurry, and promotes solid -liquid separation efficiency.

The invention relates to the technical field of hydrogenation catalysts, and discloses a gasoline selective hydrogenation catalyst and a preparation method and application thereof. The preparation method of the gasoline selective hydrogenation catalyst comprises the following steps: (1) loading alkali metal and / or alkaline earth metal onto a carrier to obtain a modified carrier; (2) loading nickel, at least part of molybdenum and a first organic matter onto the modified carrier by adopting an impregnation method, and then carrying out carbonization treatment to obtain a carbonized product; (3) loading cobalt, at least part of molybdenum and a second organic matter onto the carbonized product by adopting an impregnation method, and then carrying out hydrothermal treatment and first post-treatment to obtain a catalyst precursor; and (4) loading a third organic matter on the catalyst precursor by adopting an impregnation method, and then carrying out hydrogenolysis post-treatment. The catalyst prepared by the method has good competition and selection among hydrodenitrogenation, olefin saturation and aromatic hydrocarbon hydrogenation, and the aromatic hydrocarbon selectivity and the stability of the catalyst are improved while deep denitrification is performed.

This invention discloses a low-smoke halogen-free flame-retardant network cable and its preparation method, comprising a conductor, an insulation layer, a foamed filler strip, an aluminum-plastic composite film wrapping layer, a non-woven fabric wrapping layer, and a halogen-free flame-retardant outer sheath layer. The halogen-free flame-retardant sheath layer is prepared from the following components: ethylene-vinyl acetate copolymer, POE, pretreated magnesium hydroxide, ammonium polyphosphate, modified lignin, attapulgite, zinc borate, maleic anhydride-grafted ethylene-vinyl acetate copolymer, antioxidant, and calcium stearate. This low-smoke halogen-free flame-retardant network cable uses an EVA / POE blend as the sheath matrix and employs a ternary composite flame-retardant system of magnesium hydroxide, ammonium polyphosphate, and modified lignin, synergistically using zinc borate and attapulgite as functional additives. Without introducing halogens, the sheath material simultaneously possesses B1-level flame-retardant performance, low-smoke and low-toxicity characteristics, and transmission performance meeting the Category 6 network cable standard. The overall solution balances the requirements of flame-retardant safety and communication functionality.

This invention discloses a polymeric flame-retardant material and its preparation method, relating to the field of polymeric materials technology. In preparing the polymeric flame-retardant material, epichlorohydrin is used as a bridging agent to graft 2-(diphenylphosphino)ethylamine onto luteolin to obtain modified luteolin; polypropylene glycol, dimethylolpropionic acid, 1,4-butanediol, and isophorone diisocyanate are polymerized to obtain polyurethane; the polyurethane is reacted with methyl 4-aminocinnamate to obtain modified polyurethane; cerium dioxide is reacted sequentially with γ-glycidoxypropyltrimethoxysilane and 3-amino-1,2,4-triazole to obtain modified cerium dioxide; the modified polyurethane, modified luteolin, and modified cerium dioxide are mixed and kneaded to obtain the polymeric flame-retardant material. The polymeric flame-retardant material prepared by this invention exhibits superior flame retardancy and weather resistance.

This invention relates to the field of biomedical technology, providing a microsphere composition and its preparation method, as well as its application in the preparation of contrast agents and drugs. The microsphere composition includes a microsphere dispersant and microsphere particles; the microsphere particles include a shell and a core; the shell comprises a lipid mixture consisting of charged lipids and auxiliary lipids; the core comprises an optional therapeutic gas, and one or both of an inert gas or inert liquid; the molar amount of charged lipids is ≤60% based on the total molar amount of the lipid mixture; the pH value of the microsphere dispersant is 5-6.9. The microsphere particles of this invention can efficiently load therapeutic gases and conventional drugs, precisely target their application, exhibit excellent stability, and have high biocompatibility.

The invention discloses a filter pressing treatment process for oily sludge, and belongs to the technical field of oil and gas field waste treatment. Comprising the following steps: feeding the oily sludge into a preheating tempering tank, adding alkyl glycoside and amorphous silicon powder, and carrying out gradient heating and stirring to obtain pretreated sludge; then feeding the pretreated sludge into a mixing reactor, adding a composite modified filter aid prepared from hydrophobic modified diatomite, quaternized modified chitosan, aminated modified graphene oxide and the like, and performing stirring-ultrasonic treatment to obtain demulsified sludge; feeding the demulsified sludge into a filter press which is pre-coated with a porous non-hydrophobized diatomite pre-coating layer and is provided with double-layer breathable gradient aperture filter cloth, and finally, performing low-pressure material distribution and gradient boosting filter pressing, and after filter pressing, introducing instantaneous high-pressure nitrogen to perform micro back-flushing and cake unloading, and purging the filter cloth to complete the operation. According to the process, an oil-water-silicon fine particle emulsification system can be effectively broken and removed, the problems of high-altitude low-temperature agglomeration and system microphase separation are relieved, graded interception and blockage prevention are realized, and the filter pressing efficiency and stability are improved.

The application relates to a water-soluble manganese-doped titanium dioxide nanorod and a preparation method and application thereof, and belongs to the technical field of nanometer material preparation; the preparation method of the water-soluble manganese-doped titanium dioxide nanorod comprises the following steps: titanium tetrachloride is added into oleic acid to prepare a titanium oleate compound precursor; then manganese oleate is dissolved in oleic acid, and the above-mentioned titanium oleate compound precursor is added after ultrasonic treatment, and the compound precursor of titanium oleate and manganese oleate is obtained by continuing ultrasonic treatment; the compound precursor of titanium oleate is taken, a mixed system of oleylamine, oleic acid and octadecene is added, the compound precursor of titanium oleate and manganese oleate is injected, oil-soluble manganese-doped titanium dioxide nanorods are obtained, and then water-soluble surface modification is carried out through sodium citrate, so that the water-soluble manganese-doped titanium dioxide nanorods are obtained. The nanorod prepared by the application can be used as an excellent T1 magnetic resonance molecular imaging contrast agent, and has important application value and wide application prospect in the biomedical imaging field such as tumor detection and blood vessel imaging.

This invention belongs to the field of thermosetting resin modification technology and discloses a high-toughness, low-shrinkage unsaturated polyester resin and its preparation method. The resin comprises an unsaturated polyester resin liquid, a low-shrinkage component, a nanoparticle-reactive polyurethane masterbatch, an initiator, and an accelerator. The nanoparticle-reactive polyurethane masterbatch is composed of a bridging interfacial reactive nanomodifier, a reactive polyurethane prepolymer, and styrene. The bridging interfacial reactive nanomodifier is nano-silica dual-modified with polydopamine and methacryloyloxysilane. In preparation, the modifier and polyurethane prepolymer are prepared first, then the masterbatch is prepared. The low-shrinkage component is added to the resin liquid for pre-compatibility, followed by the addition of the masterbatch, and the mixture undergoes pre-gelation, primary curing, and post-curing to obtain the finished product. This invention combines high toughness, low shrinkage, and good dimensional stability.

The application discloses a polyurethane material containing a metal organic framework and a preparation method thereof. The polyurethane material comprises a polyurethane matrix and a metal organic framework uniformly dispersed in the polyurethane matrix, and the content of the metal organic framework is 2-6 wt%. The metal organic framework is UiO-66. The preparation method comprises the following steps: (1) mixing polyethylene glycol, the metal organic framework and a first solvent, removing the first solvent by using a distillation process, introducing the polyethylene glycol into the pore of the metal organic framework, and obtaining PEG@MOF; (2) mixing the polyethylene glycol, diisocyanate and PEG@MOF, adding a catalyst, and performing a prepolymerization reaction; (3) adding 1,4-butanediol and a catalyst, performing a chain extension reaction, adding a second solvent, and drying to obtain the polyurethane material. In step (1), the mass ratio of the polyethylene glycol to the metal organic framework is 1:1-3. The polyurethane material provided by the application can achieve the effects of excellent dispersibility and excellent mechanical properties.

The present application belongs to the technical field of rubber processing aids, and particularly relates to a composite raw rubber anti-coagulation dispersant, which is composed of deionized water, ammonia water, potassium hydroxide, sodium bicarbonate, disodium hydrogen phosphate, potassium oleate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, fatty alcohol polyoxyethylene ether, sodium lignosulfonate, sodium polyacrylate, sodium hexametaphosphate, disodium ethylenediaminetetraacetate, anhydrous sodium sulfite, sodium benzoate, polydimethylsiloxane defoaming agent, seaweed silicate stable gel microparticles and tannin zinc-magnesium-aluminum retarding nano sheets; in the preparation, a buffer complexing liquid and an alkaline stabilizing liquid are first formed, then surface active and dispersing components are added, and then two kinds of modified particles are introduced, and the product is obtained through dispersion, adjustment of pH and filtration. The present application can improve the anti-coagulation, dispersion and storage stability of the raw rubber system.