43results about How to "Facilitate redispersion" patented technology

Dry solids of anionically modified cellulose nanofibers with good redispersion are provided by incorporating 5 to 300% by mass of a water-soluble polymer relative to the anionically modified cellulose nanofibers during the preparation of the dry solids of anionically modified cellulose nanofibers.

The invention provides a preparation method of a highly-dispersed copper-zinc catalyst for carbon dioxide reduction and a use method thereof. The preparation method comprises the steps of firstly, synthesizing a copper oxide nano-particle precursor with uniform particle sizes; then preparing a ZIF (Zeolitic Imidazolate Framework)-8 MOFs (Metal Organic Frameworks)-coated copper oxide composite nanomaterial through liquid phase synthesis; and calcining the nano material through temperature programming to obtain the nitrogen-doped carbon framework-coated highly-dispersed copper-zinc catalyst. The preparation method is characterized in that the copper oxide nano-particles are added in the process of preparing the ZIF-8 of the MOFs material, so that the copper oxide nano-particles are uniformly loaded in the MOFs in situ, the copper reduction and redispersion are implemented while the carbon framework-coated highly-dispersed zinc is obtained after high temperature calcination; a large amount of pyridine nitrogen is also present in the carbon framework; a novel preparation technology of a pyridine nitrogen-doped and carbon framework-supported highly-dispersed copper-zinc catalyst is developed; the catalyst is applied to the carbon monoxide hydrogenation reduction reaction to produce carbon monoxide, and has excellent catalytic activity; the highly-dispersed copper-zinc active sitesand the presence of a large amount of pyridine nitrogen have great promotion actions on improvement of the catalytic activity.

The invention relates to an insulin nano transdermal delivery preparation and a preparation method thereof. The insulin nano transdermal delivery preparation takes recombinant human insulin as an active pharmaceutical ingredient and is a filled closed type transdermal preparation consisting of an anti-sticking layer, a drug-loaded layer and a back lining layer. The drug-loaded layer consists of nano recombinant human insulin, a carrier, a penetration enhancer and a plasticizer. The nano recombinant human insulin is obtained by dissolving insulin in a solvent, adding water-soluble auxiliary agents including liposome, chitosan, HPMC (hydroxy propyl methyl cellulose) and the like and an aqueous solution of a freeze-drying protective additive, performing low-temperature high-speed stirring and then performing freeze-drying. The patch disclosed by the invention realizes transdermal noninvasive administration through nano-scale combination of insulin and the carrier to ensure that the bioavailability of the insulin is greatly improved; the patch has the advantages of high transdermal absorption rate, fast response, good treatment effect and good product stability, does not have anaphylactic and toxic reactions to skins, and has the characteristics of good safety, small side effect and convenience in use. The preparation method of the insulin nano transdermal patch disclosed by the invention is simple, low in production cost, and easy to magnify.

The invention discloses a propane dehydrogenation catalyst, which employs silica as a carrier, Pt as a dehydrogenation active component, and Sn and V as auxiliary agents. The catalyst comprises, by weight, 0.1-2% preferably 0.2-0.8%, of dehydrogenation active component, and comprises, calculated by the weight of the carrier, 0.1-10% preferably 1-5%, of the auxiliary agent Sn, and 0.1-10% preferably 1-5% of the auxiliary agent V. A preparation method of the propane dehydrogenation catalyst is by loading auxiliary agents Sn and V and the active component Pt by using silica gel as a carrier through an impregnation method. The method can substantially increase the activity stability and olefin selectivity of the catalyst.

A premix composition for clarifying beverages like beer includes, by weight, (a) about 40 to 90%, preferably 60–85%, of silica xerogel having less than 10% water therein, preferably 5% or less, and a particle size, as defined by its mean volume average diameter MV, in both the dry state and as a 10% aqueous slurry, of less than 50μ, preferably about 5–30μ, and (b) about 10 to 60%, preferably 15–40%, of crosslinked polyvinylpyrrolidone having a particle size as defined, in the dry state, of about 10 to 50μ, and about 30–60μ in a 10% aqueous slurry, and a process of obtaining, chill-haze stabilized beer with substantial reduction in high molecular weight proteins, as well as polyphenols, flavanoids and tannins, in an efficient and effective single-step process at a rapid filter-flow rate, with undetectable residual soluble plyvinylpyrrolidone thereafter, and no microbiological growth in the premix, effective haze stability after time, and advantageous redispersibility of the premix used in the process.

A method for concentrating fibril cellulose including subjecting aqueous fibril cellulose at a concentration of not higher than 5% to pressure filtration where water is removed from the fibril cellulose by applying pressure to the aqueous fibril cellulose, and continuing the pressure filtration continued to an end point where over 50% of the water initially present is removed from the fibril cellulose. The pressure filtration is performed at a temperature of 30° C. or higher.

An aerosol-deliverable formulation comprises a liquid abrasive composition having a viscosity of 1000 mPas or less, and a propellant. The formulation provides effective, and unexpected, suspensions of abrasives that do not settle from the suspension to form a hard cake of non-redispersible solid material.

The invention discloses a dehydrogenation catalyst, which uses silica as a carrier, Pt as a dehydrogenation active component, Sn as a first aid, one or more metal of Cu, Fe, Co and Ni other as a second aid; and the catalyst comprises 0.1%-2% of the dehydrogenation active component, and calculated by the weight of the carrier 0.1-10 wt% of the first aid and 0.1-10 wt% of the second aid. A preparation method of the dehydrogenation catalyst is as below: loading the first aid Sn and the second aid, which is one or more selected from Cu, Fe, Co and Ni, and the active component Pt, by using silica gel as the carrier through an immersion method. This method can substantially increase the activity and stability of the catalyst and selectivity of alkene.

Lyophilised lactic acid bacteria and bifidobacteria products are described, characterised by a high degree of dispersibility thanks to the use of polyalcohols and/or sugars as dispersing agents. The liquid dispersions of these lyophilised products are characterised by a high degree of stability.

An ink composition includes a metal microparticle, a dispersion medium having water as a main ingredient, a dispersant for dispersing the metal microparticle into the dispersion medium, and a water-soluble polyhydric alcohol that is trivalent to hexavalent and solid under normal conditions, and whose concentration is 5 to 20 weight % relative to a total weight of the ink composition.

The invention relates to a preparation method of aqueous solution redispersible cellulose nanofibers (CNF). The method comprises the following steps: firstly, performing beating treatment on a plant fiber raw material, performing nano homogenization treatment on the slurry to obtain a CNF suspension, adjusting the pH of the prepared CNF suspension, adding a certain amount of potassium chloride, and performing drying treatment. In the method provided by the invention, the CNF is prepared by adopting the mechanical method, and the yield is higher; in the method, the CNF suspension obtained after the pH is adjusted and a salt is added for treatment is easily redispersible in an aqueous solution after being dried by vacuum, and the characteristics such as stability after re-dispersion are good; the method can reduce the storage and transportation costs of the cellulose nanofibers, and is easy to operate, and suitable for large-scale production; and the method provides a novel idea and a novel method for high-value utilization of cellulose, and provides a novel method for obtaining and preparation of the aqueous solution redispersible CNF.

The invention discloses a biodegradable polymer composite with high thermal conductivity. The biodegradable polymer composite comprises heat-conducting nanofiller and a biodegradable polymer with a shape memory characteristic, wherein the heat-conducting nanofiller is arranged in the biodegradable polymer in order. The heat-conducting nanofiller without chemical modification is mixed with the biodegradable polymer, by use of the shape memory characteristic of the polymer, the heat-conducting nanofiller is arranged in order by stretch induced self-assembly, meanwhile, the heat-conducting nanofiller arranged in order is used as a physical crosslinking site to maintain the orientation state of the material, after the obtained material is heated secondarily, the filler still keeps high orientation, a constructed orientated structure facilitates lap joint of an ordered filler network with a small quantity of heat-conducting nanofiller, so that the production cost is reduced, the material density is reduced, the strength and ductility of the material are enhanced, and the thermal conductivity of the material is improved.

A powdered polyurethane, preferably a powdered recycled polyurethane rigid foam is co-dried with a water insoluble film-forming polymer to obtain a redispersible polymer powder composite for use in hydraulic binders or cementitious compositions to improve performance of cementitious compositions or mortar, in applications such as cement based the adhesives (CBTA), or external thermal insulating composite systems (ETICS).

The invention relates to the field of catalysts, and particularly provides a regeneration method of a deactivated propane dehydrogenation catalyst, which comprises the following steps of: (a) coolinga deactivated dehydrogenation catalyst subjected to propane dehydrogenation reaction to 300-500 DEG C in an inert gas atmosphere, and carrying out regeneration treatment in a weak oxidizing gas atmosphere at the temperature; (b) continuing to cool to 200-300 DEG C in an inert gas atmosphere, and carrying out regeneration treatment in a mixed gas atmosphere containing at least two of oxygen, watervapor and inert gas at the temperature; and (c) after the step (b) is finished, replacing the mixed gas with inert gas until the temperature is reduced to 50-100 DEG C in an inert atmosphere, and carrying out regeneration treatment at the temperature in the presence of organic matters; wherein the dehydrogenation catalyst is a catalyst containing noble metal. The method can effectively recover theperformance of the catalyst and improve the utilization rate of the catalyst.

The present invention relates to compositions for the control of pests, in particular insecticidal suspension concentrates and spray solutions made from them, to processes for their preparation, and to the use of such formulations for the sustained control of animal pests (arthropods) on a variety of surfaces. The present invention furthermore relates to the use of certain polymer dispersions in pesticides, in particular to their use for extending the long-term activity of these compositions when they are applied to surfaces. The present invention furthermore relates to the use of the compositions according to the invention for controlling parasites, in particular ectoparasites, in animals.

The invention discloses a method to form a composition, which method includes fibrillating fibers to form MFC in the presence of an alkali-metal silicate whereby an MFC and silicate mixture is formed The presence of alkali-metal silicate during fibrillation of fibers to MFC, reduces the viscosity and increases the water release behavior, whereby the fibrillation can be accomplished at higher concentrations and a more uniform mixture of MFC-silicate is accomplished. The composition formed by the method of the invention may e.g. be used in paper or paperboard production, in cement production or as an additive in composites.