48results about How to "Stable chemical composition" patented technology

The invention discloses a delaying coking non-silicon defoaming agent with multiple active components and a preparation method thereof, and the defoaming agent is formed by compounding 30-50 parts by weight of polyether or modified polyether polymer, 25-35 parts by weight of high-carbon alcohol mixture, 10-15 parts by weight of high-carbon alcohol fatty acid ester or fatty acyl amide and 15-20 parts by weight of alkymer. The preparation method of the defoaming agent comprises the following steps: adding the polyether or the modified polyether polymer, the high-carbon alcohol mixture, the high-carbon alcohol fatty acid ester or the fatty acyl amide and the alkymer into a reaction kettle according to the proportion, stirring, slowly increasing the temperature to 50-100 DEG C, carrying out reaction for 1-2h, finally stopping stirring, cooling, filtering for removing solid impurities and finally preparing the delaying coking non-silicon defoaming agent. The defoaming agent can effectively suppress and eliminate the formation of bubbles in a delayed coking reaction tower, improve the treatment capacity of the reaction tower, prolong the coking time of coke and prevent clogging phenomenon.

The invention discloses a coreopsis tinctoria nutt extract and application of the coreopsis tinctoria nutt extract in preparation of medicines for treating hyperlipemia and anti-oxidation medicines. A method for preparing the coreopsis tinctoria nutt extract comprises the following steps: performing reflux extraction on a coreopsis tinctoria nutt medicinal material for 2-3 times by 12-25 times of 30-75% ethanol the amount of which is 12-25 times of the amount of the coreopsis tinctoria nutt medicinal material; mixing extract liquids, and concentrating to obtain extracting concentrate; diluting the extracting concentrate by water; refining by an AB-8 macroporous resin; sequentially eluting by water, 10% ethanol, 50-75% ethanol and 95% ethanol, and collecting the part eluted by 50-75% ethanol; concentrating and drying. The coreopsis tinctoria nutt extract comprises 10 flavones serving as main components, wherein the total content of marein and flavanomarein is more than 10 percent. Animal in-vivo experiments indicate that the coreopsis tinctoria nutt extract has a certain blood-fat regulating effect; and in-vitro anti-free radical scavenging experiments indicate that the coreopsis tinctoria nutt extract has a certain anti-oxidation effect, and flavanomarein, marein and the like are main anti-oxidation components.

The invention relates to a defoaming agent composition and application of the same in delayed coking. A defoaming agent is prepared by compounding 30 to 50 parts by mass of hyperbranched polyether, 20 to 40 parts by mass of higher alcohol fatty acid ester or fatty acid amide and 20 to 30 parts by mass of a solvent. The defoaming agent provided by the invention does not contain silicon and has good dispersibility and a fast defoaming speed; when addition amount of the antifoaming agent is about 30 mu g/g, a defoaming rate is up to more than 90%; and the defoaming agent has powerful defoaming performance at a high temperature and can be used for defoaming of a coke chamber in delayed coking.

The present invention relates to the preparation process of polynary positive pole material of lithium ion cell. The polynary positive pole material is prepared through first preparation of compound transition metal oxide in spinel structure as the intermediate product, the subsequent mixing with lithium salt and final high temperature calcining. The polynary positive pole material has composition of LiNixCoyMn(1-x-y)O2, where, x is 0.1-0.8, y is 0.1-0.5, and x+y is 0.5-1.0. The polynary positive pole material has homogeneous granularity distribution, specific discharge capacity in 2.8-4.3 V/Li up to 157 mAh/g, excellent circulating stability and low cost, and is suitable for use in lithium ion cell.

The invention relates to ferrite stainless steel which includes rare earth element yttrium and is used for a solid oxide fuel cell. The invention is characterized in that the invention comprises the following elements according to the mass percent: Y is 0.01 to 0.10 percent, C is lower than 0.03, Mn is 0.40 to 1.20 percent, Ni is 0.20 to 0.26 percent, Cr is 14.00 to 26.00 percent, Mo is 0.02 to 2.00 percent, W is 0.01 to 0.10 percent, P is lower than 0.04 percent, S is lower than 0.03 percent, Si is 0.01 to 0.05 percent, the residual is Fe; the thermal expansion coefficient is in the range of (11.8 to 13.0) is multiplied by 10 <-6> K at 25-1000 DEG C, and preferred in the range of (12.0 to 12.5) is multiplied by 10 <-6> K, and ferrite stainless steel alloy material is the alloy material which is particularly suitable for connecting and encapsulating the negative electrode and the positive electrode of the moderate temperature type solid oxide fuel cell, or can be used as the lighter of a vehicle engine, or can be used for high temperature boiler heating parts. The alloy is easy for the domestic industrial smelting and the processing formation, the manufacture cost is low, the alloy is suitable for the commercialization production, and has very high promotion and application value.

The invention discloses an NO2 sensor and a preparation method thereof. The sensor comprises an oxide single crystal substrate, a WO3 epitaxial thin film, test electrodes and noble metal catalysts. The concentration of the NO2 gas in the environment is calibrated by measuring change of the resistance value of the WO3 epitaxial thin film between the test electrodes. Distortion and tilting of a structural motif WO6 octahedron of the WO3 epitaxial thin film are achieved by regulating the stress on the interface of the oxide single crystal substrate and the WO3 epitaxial thin film to obtain the WO3 epitaxial thin film with specific crystalline phase and exposed crystal plane, higher surface activity and reaction site concentrations and stable properties, thereby improving the detectivity and stability of the NO2 sensor. The sensor provided by the invention can be used for detecting NO2 with concentration of 40mu g/m<3>-20mg/m<3>, has short response time and stable properties, can be used for monitoring the concentration of NO2 in the atmospheric environment in real time and has a broad application prospect.

The invention discloses a colored conductive concrete and a preparation method thereof. The colored conductive concrete comprises the following raw materials measured by colored conductive concrete per cubic meter: 11-86kg of graphite, 10-64kg of a pigment, 905-1067kg of cement, 850-1003kg of sand, 194-362kg of water and 0-19kg of a water reducer, wherein graphite accounts for 0.5-4.0% of total weight of water, cement and sand. The graphite and pigment are added into the colored conductive concrete at a certain ratio so that the prepared colored conductive concrete has both excellent conductivity and color and the conductivity and strength of the concrete are provided and meanwhile the people aesthetic requirements are met.

The invention provides an isostatic pressing electrical porcelain blank formula with non-plasticity clay used as raw material. The formula comprises the following components, by weight, 48%-55% of alumina, 18%-25% of feldspar flux, 15%-25% of calcined clay and 5%-15% of viscous agents. The formula takes chemically-synthesized viscous agents as viscous materials to replace plastic clay used in existing ingredients. Therefore, the non-plasticity clay can be used to replace scarce plastic clay raw materials. The cost of blank materials is reduced. The dependence of isostatic pressing electrical porcelain blanks on one-off resources is reduced.

The invention relates to a making method for producing a foamed ceramic fireproofing and heat insulating material from high silicon tailings (called white mud for short). The method which adopts a new technology comprises the following steps: proportioning, grinding and drying the white mud, a flux aid, a flux and a foaming agent, filling a refractory combination die with the above obtained dried mixture, and sintering the mixture at 1150-1500 DEG C; and carrying out demolding and cutting to obtain the fireproofing and heat insulating material. The high addition amount of the white mud is conducive to environmental protection and recycling of resources, so the product has a price advantage, and the competitiveness of the product is enhanced. The product has the advantages of uniform foam apertures, low specific gravity, low heat conduction coefficient, high mechanical strength, and realization of the fire performance reaching A level.

The invention belongs to the technical field of electroplating, and particularly relates to a bright black nickel electroplating solution, a preparation method thereof, an electroplated part and an electroplating method of bright black nickel. The bright black nickel electroplating solution preparation method comprises the following steps that 1) under the condition that the temperature is 35-55 DEG C, every 5-25g of chitosan nickel complexes is dissolved in 1L of an additive A solution with the concentration of 10-45g/L; 2) 25-105g of nickel sulfates, 15-75g of nickel chlorides, 1-3g of magnesium sulfates, 2-10g of copper sulfates and 10-55g of ammonium thiocyanates are added into the solution sequentially and stirred until all the salts are completely dissolved; 3) 25-55g of additives Bare added and stirred until the additives B are completely dissolved; and 4) 20-65g of additives C and 1-6g of additives D are further added and stirred until the additives C and the additives D are completely dissolved, and the solution becomes a transparent or semitransparent solution and then is cooled to the room temperature. A bright black nickel coating prepared with the bright black nickelelectroplating solution has the advantages of being bright, compact, wear-resistant, corrosion-resistant, good in electrical conductivity and the like; and a coating crystal structure is uniform in grain size, stable in chemical composition and capable of being regulated and controlled.

The invention provides an inorganic icon liquid-based phase-change energy storage material. The inorganic icon liquid-based phase-change energy storage material is prepared from the following components of any one of an H-bond donor and metal salt and any one of quaternary ammonium salt and quaternary phosphonium salt, wherein the H-bond donor is prepared from one or multiple of an amide compound, carboxylic acid and polyhydric alcohol; the mass percentage of the metal salt in the total mass of the inorganic icon liquid-based phase-change energy storage material is not lower than 5 percent. The invention also provides a preparation method of the inorganic icon liquid-based phase-change energy storage material. The inorganic icon liquid-based phase-change energy storage material provided by the invention has a higher heat conductivity coefficient and a higher phase-change enthalpy, is low in cost and is environment-friendly.

The invention discloses a triterpenoid saponin compound shown by a formula (I) and a preparation method thereof. The triterpenoid saponin compound is prepared by the following main steps: selecting a camellia plant raw material, performing extraction by adopting water or an alcohol-water mixed solvent, and performing macroporous resin column enrichment to obtain a theasaponin extract CSA; performing hydrolytic reaction on CSA in an alkali solution of which the pH value is 10-13, performing acid neutralization, and then performing macroporous resin column refining to obtain a theasaponin extract CSB; and separating CSB by adopting a reverse phase silica gel column chromatography technology to obtain the triterpenoid saponin compound and a composition thereof. The invention simultaneously discloses an application of the theasaponin extract in preparation of medicines and health foods, and is characterized in that the theasaponin extract has pharmacological actions of anti-inflammation, anti-hyperlipidemia and the like. The theasaponin provided by the invention is clear and definite in active ingredient, stable and controllable in quality and concise in preparation process, is easy for industrial amplification, and has a good application value.

The invention discloses a formula of a wet-method high-strength electrical porcelain blank. According to the formula, the high-strength electrical porcelain blank comprises the following components in percentage by weight: 35%-40% of alumina, 5%-10% of feldspar solvent, 30%-40% of kaolin and10%-20% of illite clay. As high plastic clays such as kaolin and illite clay are adopted in the formula, the wet blank strength of the formula is improved, the formability of the formula is enhanced, the process property of an electrical porcelain blank is excellent, the preparation cost is reduced, the formula can meet the production demands of an overall formed product which is higher than 3 meters, and the phenomenon such as falling caused by poor plasticity of the blank formula during fettling can be reduced.

The invention discloses a lubricant. Through usage of nano bentonite and acrylic ester, the suspension property of the lubricant is improved, caking, turbid and precipitating phenomena are avoided within 72 h, the adhesion property to metals is improved, pores are reduced, and workpieces are prevented from being damaged due to extrusion; through usage of nano carbon spheres, reaction of tungsten disulfide with the metals is reduced, and the lubrication persistence is improved; through matched usage of nano hydrotalcite, zinc acetate dehydrate, La2O3 nano-particles and ammonium dihydrogen phosphate, boundary lubrication films mainly comprising Fe2O3, La2O3 and the like can be formed on aluminium profile friction pair surfaces during friction, the lubrication films are firmly combined with the metals and show the excellent anti-friction and anti-wear properties, chemical components are stable, and the metals and dies are not corroded.

The invention provides a pre-melted high-refractive-index optical coating material as well as a preparation method and application thereof, and belongs to the field of optical thin film materials. The high-refractive-index optical coating material is praseodymium titanate, and the chemical formula of the high-refractive-index optical coating material is Pr5Ti5O17. In addition, the praseodymium titanate is prepared by taking TiO2, Pr6O11 and Ti powder as raw materials through a solid-phase synthesis reaction. The praseodymium titanate prepared by the preparation method provided by the invention keeps stable chemical composition in the evaporation process, can form a very flat evaporation surface during pre-melting, and is beneficial to process control in the coating process. Moreover, an optical film layer plated by adopting the praseodymium titanate disclosed by the invention has relatively high transmittance from a near ultraviolet band to a near infrared band, and meanwhile, the film layer is compact, firm and stable in chemical property, and can be used as a high-quality high-refractive-index material to be applied to optical film system design and batch film plating production.

The invention discloses a nano biosensor for detecting the concentration of hydrogen peroxide, wherein the nano biosensor is characterized in that rare earth up-conversion luminescent nanoparticles synthesized by a thermal coprecipitation method are used as a substrate, and oleic acid ligands on the surface of the substrate are epoxidized and subjected to a ring-opening addition reaction with electron-donating ligands with amino groups; an electron-donating ligand is bonded to the surface of the up-conversion luminescent nanoparticles, and a layer of metallic silver elementary substance is grown in situ on the surface of the up-conversion luminescent nanoparticles by utilizing a photo-generated free electron reduction mode under the irradiation of 365 nm ultraviolet light; and the nano biosensor is formed, wherein the nano biosensor is of a core-shell structure with the surface of metal elemental silver and an inner core of the rare earth up-conversion luminescent nanoparticles as a matrix. The invention also discloses a preparation method of the nano biosensor and an application of hydrogen peroxide concentration detection on body surface and cell level. The nano biosensor provided by the invention has the advantages of good dispersibility, stable structure, good biocompatibility, high sensing signal strength and the like in water.