37results about How to "Promote complete" patented technology

The present invention is directed to processing calls to busy telecommunications lines. In one embodiment, the presence of a subscriber accessing a computer network over a first telephone line via a first computer terminal is detected, wherein the subscriber also has a first telephone station connected to the first line. When a caller calls the first line and the first line is busy, the call is forwarded to a second telephone line associated with a call manager system. The call manager system determines when the subscriber is no longer accessing the computer network. At least partly in response to determining that the subscriber is no longer accessing the computer network, the call manager system transmits a text message to the caller, the message including the subscriber's phone number. The caller can then call back the first line using the transmitted phone number.

The invention relates to a synthetic method for Tildipirosin. The method comprises the synthetic steps of 23-hydroxy-20-piperidyl-5-O-mycaminoseyl-tylolactones, and 23-sulphonate-20-piperidyl-5-O-mycaminoseyl-tylolactones. The reaction yield of the method is high, and the conversion rate of each step of the reaction is up to more than 80%; and the purity of the product is high, and is up to more than 98.2%. The main raw material of the method is tylosin, the reaction reagent is the normal reagent which is easily obtained in the market and is cheap, and does not need to be stored in the ultralow temperature. The method is simple and safe in operation, does not need the devices in high temperature and high pressure, and has no risk. The method is capable of effectively solving the completeness of the reactant conversion, avoiding the column chromatography isolation for the intermediate product and the environment pollution, recovering the triphenylphosphine oxide of the byproduct, shortening the reaction period, improving the yield of the product, and reducing the production cost, and has the industrialized application value.

The invention relates to a method for preparing aluminum nitride powder. The method for preparing the aluminum nitride powder comprises the following steps that pseudo-boehmite gel, an inorganic carbon source, a water-soluble organic carbon source and a sintering agent are mixed, and a mixture is obtained; in a nitrogen atmosphere, the mixture is nitrogenized at the temperature of 1,250 DEG C to 1,700 DEG C, and a reduction product is obtained; under the aerobic condition, the reduction product is calcined for 3-10 hours at the temperature of 600 DEG C to 720 DEG C, and the aluminum nitride powder is obtained. The aluminum nitride powder prepared through the method is high in purity.

The invention relates to a preparation method for a high-grade borate type brake fluid, comprising the steps of synthesis for polyol ethers, a synthesis for borates, and a blending for a brake fluid. Glycerol monomethyl ether and tetrapropanol monomethyl ether are mainly obtained under the catalysis of an alkaline-earth metal catalyst by using methanol and epoxy propane as raw materials, and the polyol ethers having other molecular weights are few; cyclic and branched borates are synthesised by using boric acid, polyol ethers and ethanediol as raw materials; and a high-grade borate type brake fluid is blended by using the borates as base fluids, using the polyol ethers as diluents, and adding proper additives. The preparation method for a high-grade borate type brake fluid disclosed by the invention is low in cost, safe and reliable; improves the high-temperature air blockage resistance and low-temperature flowability of the brake fluid; and obviously improves the performances due to the generated cyclic borates in the aspects of boiling point and hydrolysis stability particularly.

The invention discloses a technique that adopts ammonium lactate as raw material to make ethyl lacfate by rectifying. The adopted equipment includes rectifying tower, condenser on the top of tower and oil-water separator. It adopts metal halide as catalyzer and place material mol proportion of ethanol and lactic acid being 1:1 and benzene being 30%-50% of lactic acid ammonium weight. Its character: the temperature of the kettle of rectifying tower, 60-90 deg.C, that of the top of the tower, 60-70 deg.C, the pressure of the whole tower, normal, the top producing the azeotropic matter of ethanol, water and benzene, which enters into the separator through the condenser, the top of the separator set with liquid-flow mouth linked with the top of the tower, the reflux ratio, 0.5-2.0, the cleaned water at the bottom of the separator discharged outside, and the rectifying kettle producing it.

The invention discloses a novel powder nanometer catalytic sulfur fixation agent for a dry cement raw material, and a preparation method thereof, wherein the novel powder nanometer catalytic sulfur fixation agent comprises nanometer lanthanum oxide, nanometer thorium oxide, nanometer praseodymium oxide, nanometer titanium oxide, nanometer nickel oxide, nanometer magnesium oxide, nanometer calcium oxide, nanometer calcium carbonate, hydroxyl calcium, potassium permanganate, potassium bismuthate, fly ash, carbon black, and the balance of a dispersion carrier. According to the technical scheme, by adding europium oxide and aluminum acetylacetonate, the sulfur fixation efficiency can achieve more than 98%. According to the present invention, the product is mixed into the raw material through the air chute in front of the homogenizing bin, and at the high temperature, the surface activity of the raw material is improved and the activation energy of the reaction with sulfur dioxide is sufficiently reduced through catalysis, oxidation and metal ion exchange, such that SO2 generated during the combustion process generates the sulfate-like solid material, and sulfate-like solid material is subjected to solid solution into the cement clinker so as not to cause corrosion and other side effects on the cement pre-heater, the kiln and other equipment.

The present invention is directed to processing calls to busy and Do-Not-Disturb capable telecommunications lines. In one embodiment, the presence of a subscriber accessing a computer network over a first telephone line via a first computer terminal is detected, wherein the subscriber also has a first telephone station connected to the first line. When a caller calls the first line and the first line is busy, the call is forwarded to a second telephone line associated with a call manager system. The call manager system determines when the subscriber is no longer accessing the computer network. At least partly in response to determining that the subscriber is no longer accessing the computer network, the call manager system transmits a text message to the caller, the message including the subscriber's phone number. The caller can then call back the first line using the transmitted phone number.

Disclosed are compounds which inhibit beta-amyloid peptide release and / or its synthesis, and, accordingly, have utility in treating Alzheimer's disease. Also disclosed pharmaceutical compositions comprising a compound which inhibits beta-amyloid peptide release and / or its synthesis as well as methods for treating Alzheimer's disease both prophylactically and therapeutically with such pharmaceutical compositions.

The invention discloses a preparation method for dimethyl dicarbonate, and belongs to the technical field of fine chemical industry. The method is characterized in that: in a organic solvent which is insoluble in water, quaternary ammonium salt is adopted as a catalyst, methyl chloroformate and a alkaline solutionare are adopted as raw materials to be subjected to a reaction for 0.5-3 hours at a temperature of 0-25 DEG C; after completing the reaction, the resulting solution is stood for demixing; the resulting organic layer is processed, and is subjected to reduced pressure distillation to collect fractions under pressure of 200 Pa at the temperature of 30-35 DEG C to obtain the product of the dimethyl dicarbonate. With the present invention, the quaternary ammonium salt is adopted as the catalyst, such that complete performance of the reaction is prompted, and the quaternary ammonium salt is easily removed after completing the reaction and is not remained in the product so as to do not influence on purity of the product; tertiary amine used in the prior art is avoided, because the tertiary amine can prompt the reaction, and can also inhibit the reaction when reaction conditions can not be controlled well, and the tertiary amine is difficult to be removed completely and can be remained in the product so as to enable the product to have disadvantages of decomposition and deterioration; reaction yield of the dimethyl dicarbonate is higher than 81%, purity of the dimethyl dicarbonate is high, GC of the dimethyl dicarbonate is more than equal to 99.8%, a solidification point of the dimethyl dicarbonate is 17 DEG C, such that each index of the dimethyl dicarbonate meets requirements of food additives, and the dimethyl dicarbonate is applicable for industrial production.

The invention discloses a determination method for gold and palladium in decoppered slag produced in a wet treatment process for copper anode slime. The method comprises the following steps: adding tartaric acid, thiourea and nitric acid into a sample, carrying out heating to a slight boiling for digestion, then carrying out filtering and washing filter residues; transferring the filter residues and filter paper into a crucible for charring and ashing, adding aqua regia, carrying out heating to a slight boiling for digestion, then carrying out filtering and washing filter residues; and determining the contents of gold and palladium in the above two filtrates and subjecting the contents to addition. According to the invention, tartaric acid can eliminate interference of coexisting ions consisting of Fe ions, Pb ions, Zn ions and the like; thiourea can lower adsorption effect of a silver chloride precipitate on palladium; nitric acid is added in stages, which is beneficial for realizing complete digestion and improving the separation and enrichment effect of palladium; filter residues are subjected to ashing, so combustible components are oxidized and removed and only ash is left; and charring is carried out before ashing of the filter residues, so moisture in the sample is prevented from rapid evaporation and raising in the process of ashing, and incomplete ashing caused by coating of carbon particles is avoided. The method provided by the invention has the advantages of simple process, low cost, no pollution, high precision and accuracy of results, etc.

The invention belongs to the technical field of 3D printing ceramics, particularly relates to a magnetic ceramic 3D printing method, and further discloses a magnetic ceramic prepared through the magnetic ceramic 3D printing method. The magnetic ceramic 3D printing method, cheap precursor particle powder is used as the raw material, ball milling is conducted on the precursor powder so that the particles are more uniform, the precursor powder after ball milling is firstly used for 3D printing magnetic ceramics, the thorough solid phase reaction and high sintering performance are effectively ensured, and anisotropy can be improved; and furthermore, uniform slurry capable of being continuously extruded through preparation is used for a rapid molding 3D printing process so as to prepare ceramicmaterials with various customized shapes, the net molding of the ceramic materials is achieved, no waste generation is achieved, the design degree of freedom is achieved, meanwhile, the performance of the material is optimized and improved through post-treatment, and the magnetic ceramic 3D printing method is suitable for industrial production of high-performance magnetic ceramics with various complex shapes.

The invention discloses a method for preparing hydroxylamine salts. Ketoxime is subjected to hydrolysis reaction in an acid solution in a rectification tower to generate the hydroxylamine salts and ketone, and the ketone generated from the top of the rectification tower is discharged in time. The method comprises the following preparation steps: firstly, taking the ketoxime and inorganic acid respectively according to the mol ratio of the ketoxime to the inorganic acid of 1:0.4-3; secondly, feeding the ketoxime and an inorganic acid aqueous solution in the first step from the middle part of the rectification tower, and controlling at reduced pressure the temperature in the tower to between 40 and 100 DEG C and the top reflux ratio to between 1 and 6; and thirdly, cooling and crystallizingthe liquor in the tower when no ketone is distilled, and filtering, washing and drying the liquor crystals to obtain hydroxylamine salt solid. The method adopts rectification technology, simplifies and shortens the technological flow, has a simple technological line and post treatment, can evaporate the ketone generated by reaction in time because the reaction and rectification are performed simultaneously, breaks through the reaction balance, is favorable for complete reaction, improves the conversion rate and the yield of the hydroxylamine salts, and guarantees the stability of the product quality because the purity of products is high.

The invention relates to monitoring and analysis of a water body, in particular to a method for digesting total iron in a water body. The method comprises the following steps of: 1, adding the water sample to a sealed, pressure resistant and temperature resistant container, and adding nitric acid to obtain a standard water sample; 2, heating the standard water sample, obtained by the step 1, at temperature of between 130 and 150 DEG C for digestion, wherein the digested standard water sample is at a sub-boiling state until the standard water sample is completely clear; and 3, standing and cooling the standard water sample, obtained by the step 2, and measuring supernatant by a plasma emission spectrometer.

Emergency call-routing apparatus, and an associated method, for use in a packet-based, telephonic network. An emergency call router is positioned selectably to provide local call handling functionality to a local network that is normally connected by way of an access gateway to the telephonic network whose operation is normally controlled by a softswitch. The apparatus is used when, e.g., a total communication link failure condition occurs between the access gateway and the softswitch. The emergency call router selectably routes calls within the local network to permit continued, local calling functionality in spite of the failure of the communication link. High-priority calls, such as calls placed to an emergency dispatch center, are routed within the local network to a designated, local-network station. And local calls are also selectably routed by the emergency call router. A call priority scheme is also used in the event that call capacity is exceeded. Calls of higher priority are permitted while calls of lower priority are blocked.

The invention discloses biological organic fertilizer and a preparation method thereof, and relates to the field of production and preparation of organic fertilizer. The problems of long fermentation period of excrements of livestock, incomplete fermentation and lower adding amount of straws during fermentation are solved. The biological organic fertilizer is prepared from the following components in parts by weight: 80 to 100 parts of cow dung, 50 to 60 parts of chicken manure, 30 to 40 parts of corn stalk flour, 20 to 30 parts of biological protein additive, 30 to 40 parts of biological carbon powder, 30 to 40 parts of furfural residues, 0.5 part of strain and 0.5 part of strain nutritional agent. The biological organic fertilizer disclosed by the invention has the advantages of short fermentation period, high speed and high efficiency. The total amount of the nitrogen phosphorus and potassium in the obtained biological organic fertilizer can be up to 10 percent to a maximum extent and the fermentation reaction is complete and thorough.

The invention relates to a method for preparing a TiFe alloy by reducing a ferrotitanium oxide under a microwave field; and the method uses microwave heating for quickly heating titanium and iron oxides and an added reducing agent, and uses a reduction action to synthesize the TiFe alloy. The method has the following characteristics: CaH2 is adopted as the reducing agent, and is uniformly mixed with a titanium and iron oxide mixture (TiO2+Fe2O3) or a ferrotitanium ore (FeTiO3) through ball milling; and because of the characteristic of easy generation of interaction between the titanium and iron oxides and the microwave field, raw materials are uniformly heated to a temperature of 1273-1473 DEG C, and the temperature is kept by 40-80 min, so that the raw materials generate the reduction reaction under high temperature. Then, samples are cleaned by acetic acid water solution to obtain TiFe powder with a purity of 70-85%. The method is simple and feasible, overcomes the problems of high energy consumption and high raw material cost in the conventional suspension smelting precision of ferrotitanium alloys, and fully uses the advantages of speediness and high efficiency in microwave heating.

The invention discloses an acid-sensitive amphipathic compound, and a preparation method and an application thereof. The method includes two steps of reactions, wherein itaconic anhydride, 1,4-butanediol and vinyl isooctyl ether are raw materials and chloroform is a solvent; in the first reaction step, the itaconic anhydride and 1,4-butanediol are reacted to form a pure product A; in the second reaction step, the pure product A and the vinyl isooctyl ether are reacted, under catalytic effect of a catalyst, p-toluenesulfonic acid, to finally prepare the acid-sensitive amphipathic compound, yield being more than 90%. Two terminals of the compound are respectively oleophylic and hydrophilic, so that the compound is amphipathic and can be self-assembled in water to form nano-micelle. The nano-micelle of the acid-sensitive amphipathic compound is good in biocompatibility, is basically toxic-free and is free of influence on body health and rejection by human body; meanwhile, the compound canbe degraded under acidic conditions, so that the compound is suitable for being used as a target carrier for anticancer drugs.

The invention relates to the technical field of brake fluid production, and discloses an efficient borate type brake fluid and a preparation method thereof, and the preparation method comprises the following production steps: (1) synthesizing an esterification fluid, (2) blending a base fluid, and (3) preparing the efficient borate type brake fluid. According to the efficient borate type brake fluid and the preparation method thereof, the produced efficient borate type brake fluid takes a polyalcohol ether as a diluent, the borate and the polyalcohol ether are combined, the reasonable mass percent is adopted, the consumption of the borate is reduced, the cost is reduced, nitrogen atoms are introduced into the molecular structure of the borate, and a stable six-membered ring internal ligandis formed; on the basis of improving the wear resistance and friction reduction performance, a long carbon chain is introduced into molecules, triester is formed, steric hindrance is increased, attack of water molecules is hindered, and therefore the hydrolysis resistance of the brake fluid is better improved, the problem that boric acid is likely to be separated out through water due to the toohigh content of boric acid is solved, and meanwhile it is guaranteed that the brake fluid has good high-temperature air resistance.

The invention discloses a method for preparing p-phenylenediamine through hydrogen reduction. The method specifically comprises the following steps: (1) adding deionized water, absolute ethyl alcoholand catalyst into two serially connected reactors; (2) controlling temperature of reactors, keeping stirring and continuously introducing hydrogen into the reactors, and controlling inner pressure ofthe reactors; (3) continuously adding deionized water and paranitroaniline into a first level reactor when the inner pressure of reactors meets the requirement; (4) opening a discharging port of the first level reactor and discharging into a second level reactor, and meanwhile, opening the discharging port of the second level reactor and discharging into a catalyst settling tank, while carrying out steps (1), (2) and (3); (5) opening the discharging port of the catalyst settling tank and discharging into a separation device, after the material in the catalyst settling tank settles down; (6) removing solvent and vacuum-drying, thereby acquiring an end product of p-phenylenediamine. According to the invention, green and environment-friendly solvent and catalyst are used for preparing p-phenylenediamine through hydrogen reduction, product yield is high and purity can reach up to 100%.

The invention relates to a preparation method for a high-grade borate type brake fluid, comprising the steps of synthesis for polyol ethers, a synthesis for borates, and a blending for a brake fluid. Glycerol monomethyl ether and tetrapropanol monomethyl ether are mainly obtained under the catalysis of an alkaline-earth metal catalyst by using methanol and epoxy propane as raw materials, and the polyol ethers having other molecular weights are few; cyclic and branched borates are synthesised by using boric acid, polyol ethers and ethanediol as raw materials; and a high-grade borate type brake fluid is blended by using the borates as base fluids, using the polyol ethers as diluents, and adding proper additives. The preparation method for a high-grade borate type brake fluid disclosed by the invention is low in cost, safe and reliable; improves the high-temperature air blockage resistance and low-temperature flowability of the brake fluid; and obviously improves the performances due to the generated cyclic borates in the aspects of boiling point and hydrolysis stability particularly.

The invention relates to a preparation method of ethyl trifuoroacetate, trifluoroacetic acid and anhydrous ethanol are taken as main raw materials, a strong acid cation exchange resin is taken as a catalyst, and the anhydrous ethanol is dripped at the temperature which is lower than 50 DEG C and the atmospheric pressure and maintained for a period of time for complete reaction. The catalyst is filtered, the drying in a drying tower which is filled with solid silica gel particles is carried out for removing the residual water, the atmospheric distillation is carried out, and a fraction which is collected at 58 DEG C to 64 DEG C is a finished product. The production process is carried out under the completely sealed state, the catalyst can be recycled for circulating use, and the fraction after collecting the finished product can be recycled. The preparation method is used for preparing the ethyl trifuoroacetate, and the product is an importable organic chemical raw material which is mainly used for synthesizing organic fluorine compounds and can be used for preparing pesticides, medicines, dyes, liquid crystals and industrial chemicals. The preparation method has complete and standard process and convenient operation, and the preparation method is applicable to the industrial production and can effectively improve the purity and the yield of the product, reduce the production cost and has no environmental pollution.

The invention belongs to the technical field of 3D printing ceramics, particularly relates to a magnetic ceramic 3D printing method, and further discloses a magnetic ceramic prepared through the magnetic ceramic 3D printing method. The magnetic ceramic 3D printing method, cheap precursor particle powder is used as the raw material, ball milling is conducted on the precursor powder so that the particles are more uniform, the precursor powder after ball milling is firstly used for 3D printing magnetic ceramics, the thorough solid phase reaction and high sintering performance are effectively ensured, and anisotropy can be improved; and furthermore, uniform slurry capable of being continuously extruded through preparation is used for a rapid molding 3D printing process so as to prepare ceramicmaterials with various customized shapes, the net molding of the ceramic materials is achieved, no waste generation is achieved, the design degree of freedom is achieved, meanwhile, the performance of the material is optimized and improved through post-treatment, and the magnetic ceramic 3D printing method is suitable for industrial production of high-performance magnetic ceramics with various complex shapes.