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 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.

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 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.

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 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 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 present invention relates to a synthetic method of tedirosin, which comprises 23-hydroxy-20-piperidinyl-5-O-mycaminosyl-tylonolide, 23-sulfonate group-20- Piperidinyl-5-O-mycaminosyl-tylonolide and other synthetic steps. The reaction yield of the method of the invention is high, and the conversion rate of each step reaction can reach more than 80 percent; the purity of the product is high, and can reach more than 98.2 percent. The main raw material used in the present invention is tylosin, and the reaction reagent is a conventional reagent, which is easy to obtain in the market, cheap, and does not require ultra-low temperature storage. The process of the present invention is safe and simple to operate, does not require high temperature, high pressure and other equipment, and is not dangerous It effectively solves the completeness of the conversion of reactants, avoids the separation of intermediate products by column chromatography and the difficulty of recovery of by-product triphenylphosphine oxide and environmental pollution, shortens the reaction cycle, improves the yield of products, The production cost is reduced, and the method has industrial application value.

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.

The invention discloses a foamed fluorine-containing polyimide and a preparation method of foam thereof, belonging to the field of foamed polyimides and preparation of foam thereof. The preparation method of the foamed fluorine-containing polyimide sequentially comprises the following steps: adding fluorine-containing diamine, fluorine-containing dianhydride and blocking agent which are dissolved in an organic solvent into a reactor; heating the reaction solution, and adding organic alkali while stirring; and dehydrating the reaction solution under reduced pressure. The preparation method of the fluorine-containing polyimide foam comprises the following steps: forming and foaming the fluorine-containing polyimide by microwaves, and curing at normal temperature to prepare the fluorine-containing polyimide foam. The prepared foam precursor solution has favorable storage stability, and is suitable for casting, spray coating, extrusion and other processing techniques. The prepared foam has the advantages of low density, very low hygroscopicity and favorable toughness, and does not need to add any toughening modifier.

The invention provides a fuselage alloy which comprises 0.01-0.08% of Sc, 0.06-1.5% of Mn, 0.03-0.04% of Ti, 0.01-0.04% of Li, 0.05-0.15% of Sn, 0.21-0.30% of Cu, 9.0-12.0% of Ni, 0.18-0.21% of Cr, 0.01-0.03% of Y, 0.10-0.20% of La, 0.01-0.02% of Tb, 0.01-0.02% of Dy, 0.20-0.30% of Ho, 0.01-0.03% of Eu, 0.50-3.0% of Er, 0.31-0.42% of Zn, 0.10-0.50% of Pb and the balance of Al. Since rare earth elements are added into the prepared alloy material, in the case of same force bearing, the weight of structural parts is obviously reduced, the corrosion resistance is good, and the hardness is high.

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 device for producing hydroxylamine hydrochloride. The device comprises a tubular reactor, a rectification separation tower, a condenser, a premixing tank, a metering inlet pump and a collecting tank, wherein the premixing tank, the metering inlet pump, the tubular reactor, the rectification separation tower, the condenser and the collecting tank are sequentially connected, the tube diameter of the tubular reactor is consistent with the tower diameter of the rectification separation tower, and the top of the tubular reactor is vertically connected with the bottom of the rectification separation tower. The invention also discloses a method for producing the hydroxylamine hydrochloride by adopting the device. The device and method disclosed by the invention have the advantages that continuous production of the hydroxylamine hydrochloride is realized, production efficiency is improved, energy consumption is reduced, and cost is saved.

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 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.

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.