929 results about "Chemical preparation" patented technology

The invention belongs to the technical field of a soft chemical method. According to the invention, the method is used for overcoming the defects that the traditional solid-phase glass powder method for preparing a hollow glass micro-balloon is high in energy consumption, long in technical process and difficult in controlling grain size distribution and the hollow glass micro-balloon prepared according to a liquid-phase atomizing method is high in alkalinity, easy to absorb water, high in strength and easy to break, and the like. A liquid material system is compounded through a chemical reaction; after the system is homogenized, the system is quickly atomized, dewatered and dried, thereby obtaining approximate spherical precursor powder with required grain size and corresponding distribution; and the powder is treated under high temperature at 600-1100 DEG C, thereby obtaining a micron-scale hollow glass micro-balloon with the volume floating rate being above 90%, the SiO2 content (weight) being 55-88%, the true density being 0.1-0.7g/cm<3> and the compression strength being 1-50MPa. The method is low in energy consumption, free from fusion and sintering, and high in yield. The prepared hollow glass micro-balloon is high in compression strength, light in weight, low-alkali, waterproof, excellent in fluidity and dispersibility, and suitable for various high-performance light compound materials.

A supersonic chemical preparation method for grapheme quantum dots relates to a preparation method for grapheme quantum dots, and especially relates to a method for preparing a grapheme quantum dot solution with the characteristics of good monodispersity and luminescence performance using a simple and environmentally friendly process with cheap carbon black or graphite powder as the raw material. The preparation method provided in the invention is characterized by adding a dispersant into carbon black or graphite and obtaining grapheme quantum dots under the action of supersonic wave. The grapheme quantum dot solution prepared in the invention has the characteristics of luminescence, monodispersion, water-solubility, etc.

The invention discloses a pesticide preparation containing plant vinegar liquid, wherein the ingredients include plant vinegar liquid 1-99%, conventional pesticides 0.1-90.0%.

The purpose of the invention is providing a micro-channel chemical preparation method of porous metal-organic framework material. The method comprises the following steps: respectively injecting a liquid medium containing one or more organic compounds with at least one unidentate ligand, a liquid medium containing one or more metal ions, a liquid medium containing a deprotonation assistant and an inert gas into a micro-channel reactor through different inlets, carrying out a coordination reaction on the above obtained mixed material liquid in the micro-channel at a certain temperature under a certain pressure to form a coordination compound, crystallizing, filtering, washing, and drying to prepare the porous metal-organic framework material, wherein the micro-channel reactor has at least two inlets and one outlet; the addition amount of the deprotonation assistant is 0-50% of the mole number of all metal ions; a ratio of the volume velocity of inert gas added into the micro-channel reactor to the bulk volume velocity of the liquid phase is 0-100:1; and the crystallization process can be omitted. The method has the characteristics of simple and safe operation, high efficiency, large throughput and easy amplification.

The invention relates to a preparation method of compound inorganic antibacterial powder, which comprises the following steps: preparing aqueous Na2WO4 and Zn(NO3)2 solutions into a ZnWO4 precursor under an ultrasonic condition, wherein the concentrations of both the Na2WO4 solution and the Zn(NO3)2 solution are 0.2mol/L; calcining the precursor in sodium nitrate to obtain a cured product, and sufficiently soaking and washing the product in distilled water; and filtering, and drying to remove remaining molten salt so as to obtain ZnWO4 antibacterial powder. Compared with the simplex ultrasonic chemical preparation method, the ultrasonic molten salt preparation method has the advantages of regular crystal morphology and uniform particles of the ZnWO4 antibacterial powder, can prepare the ZnWO4 antibacterial agent having a particle size of 500nm or so and favorable antibacterial properties. Besides, by the invention, the facts that the high-cost silver antibacterial agent can be replaced, and the prepared antibacterial agent can be used in industries and fields of plastics, fibers, paint and the like are possible to come true.

The invention relates to the technical field of metallic material, in particular to the chemical preparation method of a series of flaky micron silver powder. Adopt chemical deoxidizing method under acidic condition, take water as dispersion medium; under the condition that no surfactant or high molecule is used as dispersant, silver nitrate is directly deoxidized in solution by using deoxidizing agent; use acid as morphology regulator to prepare flaky micron silver powder; the final product is obtained through washing, filtering and drying. The flaky micron silver powder obtained from the invention can be used for the preparation of conductive coatings, conducting paint and conductive adhesive. The method of the invention has simple technique, and the production yield is more than 95 percent; the obtained product has a regular morphology with high purity, good electric conductivity and uniform size distribution. The particle diameter and the thickness of the obtained products are adjustable within respective sizes of 5 to 50 micron and 0.1 to 0.5 micron.

The invention relates to the technical field of novel material organic chemicals, relates to a coumarin-carbazole type oxime ester compound as well as a preparation method and application thereof, and in particular relates to a novel compound of a structure of formula (I) or (II) as shown in the specification, a chemical preparation process technique of the novel compound, application of the novel compound as a radiation curing light-sensitive initiator, a radiation curing formula product of the novel compound, and particularly application of the novel compound in multiple places such as UV-Vis-LED excited light cured coatings or ink.

The invention discloses sitagliptin and an enzyme-chemical preparation method of an intermediate of the sitagliptin. The method comprises the steps of mixing 3-carbonyl-4-(2, 4, 5-trifluoro-phenyl)butyrate, D-amino acid dehydrogenase, a cofactor, cofactor-catalyzing cyclophorase, an amino doner, a cosolvent and a buffer solution according to a certain ratio to obtain a product (R)-3-amino-4-(2, 4, 5 trifluoro-phenyl)butyrate; enabling the (R)-3-amino-4-(2, 4, 5 trifluoro-phenyl)butyrate to be subjected to the steps of amino protection, condensation and deprotection to obtain sitagliptin free alkali. Compared with the prior art, the method adopted by the invention is less in process route, shorter in reaction time, improved in product purity and yield and lower in production cost, and is suitable for industrial production.

The invention provides a defoaming agent for a boxboard paper making, which belongs to the field of chemical preparation special for papermaking, and is characterized in that the invention consists of the following components. (1) 5 to 40 percent organic hydrocarbon defoaming mixture consists of organic hydrocarbon and superfine particles consisting of hydrophobic inorganic particles, a surface area of which is bigger than 50m²/g, and organic particles such as ethyl pillared double stearic amide (EBS), aluminum stearate, MQ silicone resin and so on; (2) 1 to 30 percent fatty alcohol; (3) 5 to 70 percent fatty alcohol polyether; (4) 5 to 50 percent fatty alcohol polyether; (5) 5 to 60 percent common group modified polyether; (6) 1 to 10 percent polyether organic silicon modification, also simply called 'silicon polyether'. The invention is a cheap and high-efficiency defoaming agent for a linerboard paper making, improves the performance by complex and increasing effect of the components, and further solves the problem of the foams in the boxboard production system.

The invention discloses a cleaning cocoon cooking method. The method comprises the processes of: external vacuum infiltration, cooking by an automatic cooker, cocoon steaming, and adjustment, wherein a reelability agent originally used for cocoon cooking replaces a penetrating agent for penetrating to be used in the external vacuum infiltration cocoon cooking process; in the condition with 30-50 DEG C water temperature, the reelability agent can only have infiltration function with water to be adsorbed between cocoon layers and on the surface of a cocoon filament; and in the cocoon cooking process and in the condition with 60-80 DEG C water temperature, the reelability agent can promote the cocoon filament sericin dissolution to reduce adhesion between cocoon filaments for the smooth dissociation of the cocoon filaments, so that the reelability agent has the reelability function in the cocoon cooking process. One chemical preparation achieves two functions, the chemical preparation is less and easily controlled in dose, process is simple, operation is convenient, and production cost is low.

The invention provides a low-cost preparing method for a high-temperature superconductive coated conductor strip and belongs to the technical field of manufacturing of high-temperature superconductive materials. The low-cost preparing method comprises the following steps that (1) the surface of a metal base band is cleaned; (2) by the adoption of the chemical solution deposition planarization (SDP) method, an isolating layer is prepared on the metal base band; (3) by the adoption of an ion beam auxiliary radio frequency magnetron sputtering method (IBAD-MgO), a biaxial texture magnesium oxide layer is prepared on the isolating layer; (4) a lanthanum manganate layer is prepared by the adoption of the radio frequency magnetron sputtering method; (5) a cerium oxide layer is prepared by the adoption of a direct-current magnetron reactive sputtering method; (6) a superconductive layer is prepared by the adoption of a metal organic deposition decomposition method (MOD); (7) a silver protective layer is prepared by the adoption of a direct-current magnetron sputtering method; (8) annealing is conducted in high-purity oxide; (9) a copper stable layer is arranged in an electroplating mode according to use requirements. According to the low-cost preparing method for the high-temperature superconductive coated conductor strip, through comprehensive application of physical preparation methods and chemical preparation methods, high-temperature superconductive strips can be produced in a large-scale mode at low cost.

A chemical preparation method for a CdTe quantum dot fluorescent probe for detecting a trace amount of paraquat comprises the step of modifying thioglycollic acid on the surface of the CdTe quantum dot fluorescent probe emitting a red emission spectrum band so as to enable the CdTe quantum dot fluorescent probe is provided with carboxyl functional groups on the surface. The preparation process comprises the following two specific steps: firstly, preparing a NaHTe solution; then, synthesizing CdTe quantum dots of which the surfaces are modified with thioglycollic acid, and adjusting the pH value to be 10-12 with KOH, so as to obtain the CdTe quantum dot fluorescent probe. According to the invention, carboxyl with negative charge on the surfaces of the CdTe quantum dots and target paraquat molecules with positive charge have the electrostatic interaction through the positive charge and negative charge, when the CdTe quantum dots and the paraquat approach to each other in space, the red spectrum band emitted by the CdTe quantum dot fluorescent probe can be absorbed by green target analyte paraquat modules through the fluorescence resonance energy transfer principle, and the detection of a trace amount of paraquat can be implemented through the utilization of the variation of the CdTe quantum dot fluorescence intensity.

The invention discloses a new method for solidification treatment of tailing sand accumulated in an ore field, in particular to a tailing sand biological prefabricated product and a preparation method thereof, and belongs to the cross scientific and technical field of microbiology and building materials. The method is characterized in that the cementing mechanism is realized by using microorganisms to induce the generation of calcium carbonate to conduct solidification treatment, so as compared with other using methods for the tailing sand, the method is environment-friendly and free of environmental pollution, and the calcium carbonate formed by microbial mineralization has the cementing property that cannot be obtained from chemical preparation. The prefabricated product comprises the following raw materials: the tailing sand from an iron ore field, bacillus pasteurii, casein, soy protein and anhydrous calcium chloride, which are shaped in a cementing mode according to a definite cementing process. The prefabricated product can be used for cementing prefabricated bricks as well as for the reinforcement of tailing sand ore dams. The new interdisciplinary method provided by the invention has the biggest characteristics of environment protection, no pollution, recycling of discarded tailing sand, and the like.

The invention discloses a process for synthesizing zinc pentaerythritol in a heat stabilizer, and relates to the technical field of chemical preparation. The particular process includes respectively weighing activated zinc oxide and pentaerythritol powder according to a molar mass ratio of 3:2; placing the activated zinc oxide and the pentaerythritol powder in a high-speed mixer, mixing the activated zinc oxide and the pentaerythritol powder in the high-speed mixer at the rotational speed of 1300-1500 r/min, mixing and stirring the activated zinc oxide and the pentaerythritol powder for 20 minutes to obtain mixtures and carrying out reaction on the mixtures in a reactor for the reaction time of 45-90 min; cooling products until the temperatures of the products reach the room temperature; grinding the products by the aid of an ultrafine grinder to obtain the zinc pentaerythritol. The process has the advantages that the process for preparing the zinc pentaerythritol is simple, and the zinc pentaerythritol prepared by the aid of the process has initial-stage coloring resistance just like zinc stearate and is high in zinc burning inhibiting capacity and long-term heat stability.

The invention discloses a method for preparing 2-ethyl hexanoic acid by catalytically oxidizing 2-ethylhexanal by molybdovanadophosphoric acid, and relates to a method for preparing a chemical preparation. The method comprises the following steps: weighing molybdovanadophosphoric acid and dissolving the molybdovanadophosphoric acid in distilled water at first and then in hydrochloric acid to prepare a catalyst solution; adding 2-ethylhexanal and the prepared catalyst in an ordinary-pressure reaction device, slowly heating and stirring the mixture, regulating oxygen flux, and starting to introduce oxygen when the temperature rises to the reaction temperature; after the reaction is ended, separating out the aqueous phase solution on the lower layer to obtain organic phase matter on the upper layer; and depressurizing and distilling the organic phase matter to obtain colorless transparent and pungent oily liquid, 2-ethyl hexanoic acid. By changing the ratio of molybdenum to vanadium of the catalyst and optimizing the reaction condition, the conversion rate of the 2-ethylhexanal reaches above 99%, and the selection and yield of the 2-ethyl hexanoic acid reach above 98% respectively.

The invention discloses a textile. A plain-weave or diagonal-weave organization unit is interwoven by warps and wefts, the warps are made of colored cotton, the wefts are made of natural colored hemp, the warps and the wefts of the plain-weave or diagonal-weave organization unit are arranged vertically in a layered manner, and the ratio of the warps to the wefts is 5:3. The production process of the textile includes weaving process and finishing process. The warps and the wefts of the textile are properly matched vertically in the layered manner, and mutually make good for deficiency so as to realize perfect combination of appearance and hand feeling. In addition, the textile has functions of temperature regulation, allergy prevention, static elasticity prevention and antibiosis. The production process includes the pure physical finishing process, chemical preparation is omitted, pollution is reduced, and the production process is environment-friendly.

The invention discloses a chemical preparation method of a metal cobalt nanowire and relates to cobalt nanowire preparation, in particular to a method for adopting a magnetic-field self-assembling method to prepare the cobalt nanowire under the premise that no template is used. The method is characterized in that by utilizing constraint action of an applied magnetic field on magnetic cobalt particles, self-assembling is realized to enable the magnetic cobalt particles to grow in a uniquely-oriented manner, and the cobalt nanowire is prepared in a pure water phase. The diameter of the cobalt nanowire prepared by the method is 100-1000 nanometers, the length of the cobalt nanowire is 10.0-80.0 micrometers, the length-diameter ratio reaches 10-200, and the cobalt nanowire is composed of pure cobalt. The method has the advantages of needlessness of template pre-preparation, mild reaction condition, easy-to-get material, simple technological process and neat product shape.

The present invention relates to an electrochemistry synthetic method of tetributyl tribromide of ammonium and belongs to the field of chemical formulation preparing technology. Sadi synthetic method in accordance with the present invention is as follow: dissolving tetrabutyl ammonium bromide in a aqueous solution of bromium salts such as ammonium bromide, potassium bromide or sodium bromide, magnetic-stirring it until reaching a entire solubilization, and then restirring it after adding organic solvent such as methylene dichloride or acetonitrile therein; putting the solution into an electrolytic tank of non-diaphragm type, selecting platinum meshwork as cathode and anode, inputting a constant electrical current for electroanalysis; electrolyzing for 3 hours under normal temperature and magnetic stirring to obtain tetributyl tribromide of ammonium in oil phase finally; washing the oil phase with distilled water, evaporating the organic solvent off and exposing it to air for a period of time, after the product solidifies, washing it with water, performing a recrystallization with methanol to obtain high-purity tetributyl tribromide of ammonium solid.

The invention discloses a water purifying agent for aquaculture, and a preparation method thereof. The water purifying agent comprises, by weight, 50-60 parts of tourmaline particles, 30-50 parts of modified zeolite, 20-30 parts of polyaluminum chloride, 15-25 parts of potassium ferrate, 10-20 parts of copper sulfate, 3-8 parts of carbon black, 10-30 parts of activated carbon fibers, 2-8 parts of diatomaceous earth, 3-8 parts of calcium oxide and 1-5 parts of magnesium oxide. The preparation method comprises the following steps: crushing and uniformly mixing the tourmaline particles, modified zeolite, polyaluminum chloride, potassium ferrate, copper sulfate, carbon black, activated carbon fibers, diatomaceous earth, calcium oxide and magnesium oxide to obtain a powder, and drying the powder to produce the water purifying agent for aquaculture. The water purifying agent for aquaculture has the advantages of physical purification and chemical preparation synergism, obvious coagulation effect, and fastness and thoroughness in purification, and is suitable for large-scale promotion.

The invention belongs to the technical field of chemical preparations and particularly relates to a formaldehyde scavenger and a preparation method thereof. The formaldehyde scavenger comprises the following raw materials in parts by weight: 10-20 parts of amino acid, 10-20 parts of starch, 5-10 parts of casein, 5-10 parts of polysorbate, 10-15 parts of isoamyl alcohol, 30-50 parts of plant flower extracts, 5-10 parts of active carbon carboxymethylcellulose, 6-8 parts of a penetrant, 5-10 parts of pillared rectorite, 10-20 parts of chitosan and 80-120 parts of deionized water. The formaldehyde scavenger provided by the invention is high in absorption efficiency and capable of eliminating free formaldehyde in air, reducing the release amount of formaldehyde in a decorated product and simultaneously improving the stability of the formaldehyde in the decorated product so as to solve the problem of formaldehyde pollution caused after indoor decoration and the health of people is beneficial.