39results about How to "Lower temperature conditions" patented technology

Disclosed is a conductive filler which can be fusion-bonded under lower temperature conditions (with the peak temperature of not less than 181° C.) than the reflow heat treatment conditions for an Sn-37Pb eutectic solder. This conductive filler is applicable to heat-resistant uses similar to those of the Sn-37Pb eutectic solder. The conductive filler is a mixture of first metal particles composed of an alloy having a chemical composition including 25-40% by mass of Ag, 2-8% by mass of Bi, 5-15% by mass of Cu, 2-8% by mass of In and 29-66% by mass of Sn, and second metal particles composed of an alloy having a chemical composition including 5-20% by mass of Ag, 10-20% by mass of Bi, 1-15% by mass of Cu and 50-80% by mass of Sn. In the mixture, 20-10,000 parts by mass of the second metal particles are contained per 100 parts by mass of the first metal particles.

The invention discloses a preparation method and application of ZnO/TiO2 composite powder. The preparation method comprises the following steps: dissolving soluble a zinc salt, a surfactant and butyl titanate in alcohol, and mixing to obtain a raw material liquid; adding a strong base aqueous solution to the raw material liquid under the stirring condition to obtain a mixed liquid; and reacting the mixed liquid at 120-180 DEG C for 8-16h, washing and drying to obtain the ZnO/TiO2 composite powder. The preparation method is relatively low in temperature conditions, good in controllability, simple in preparation and strong in operability, is favorable to industrialized popularization and production, and has wide application prospects. The obtained ZnO/TiO2 composite powder is complete in crystallization, small in original granularity, uniform in distribution and low in agglomeration, and is particularly suitable to be used as an additive for an automobile paint to be applied to the automobile paint, so that the automobile finish coat has the advantages of being plump in lacquer film, level and bright, strong in adhesion force, high in hardness, good in light retention rate, excellent in natural solarization performance and the like.

The invention provides a method for preparing taurine from sodium hydroxyethyl sulfonate. An ionic liquid homogeneous catalyst is adopted to catalyze an ammonolysis reaction of sodium hydroxyethyl sulfonate, and then steps of neutralization, crystallization separation and the like are carried out to obtain the finished taurine. Compared with a conventional alkaline catalyst, the ionic liquid homogeneous catalyst adopted in the process can significantly reduce the temperature and pressure of the ammonolysis reaction of the sodium hydroxyethyl sulfonate, so that the reaction time is shortened, and industrial production is facilitated.

The invention relates to an oxygen conducting membrane includes a dense, mixed-conducting, multi-metallic oxide membrane having one surface which is coated with dispersed particles based on noble metals or magnesium oxide.

A water bath type carbon dioxide vaporizer relates to the technical field of the structure a heat exchange tank. A carbon dioxide air outlet pipe and a carbon dioxide liquid inlet pipe are respectively connected at the upper and the lower ends of the tank body, a main pipeline is vertically arranged in the tank body, the upper end of the main pipeline is a closed end, and the lower end thereof id connected with the carbon dioxide liquid inlet pipe; coil pipes are evenly arranged along the length direction of the main pipeline, one end of the coil pipe is communicated with the main pipeline, and the other end thereof is connected with the carbon dioxide air outlet pipe; the tank body is respectively provided with a water inlet and a water outlet which are communicated with an inner cavity of the tank body, wherein, the water outlet is arranged higher than the water inlet; the tank body is provided with a steam inlet and a condensed water outlet, and a steam-heating pipe is connected between the steam inlet and the condensed water outlet in the inner cavity of the tank body in a sealing way. The invention has reasonable structure, even temperature, high heat exchange benefit and obvious energy-saving effect, and is in accordance with the production requirements of beer manufacturer; the prepared beer has pure taste and sufficient air content.

The invention provides a method for preparing taurine. The method comprises the following steps: carrying out an addition reaction on ethylene oxide and sodium hydrogen sulfite in the presence of a heterogeneous catalyst so as to obtain sodium hydroxyethyl sulfonate at high selectivity; carrying out an ammonolysis reaction on the synthesized sodium hydroxyethyl sulfonate under catalysis of a homogeneous catalyst; and neutralizing, crystallizing, separating and the like, thereby obtaining the finished taurine. Compared with the traditional production process, the process disclosed by the invention has the advantages that by-products in the addition reaction process can be obviously reduced, the temperature and pressure of the ammonolysis reaction are reduced, the reaction time is shortened,and industrial production is easily realized.

A method for preparing Ti2AlC ceramic material at the low temperature comprises steps as follows: Ti powder, Al powder and TiC powder are selected as raw materials, firstly, the raw materials are subjected to ball milling and mixing in a certain mole ratio and then are pressed to form blocks, the pre-pressed blocks are put in an air furnace to be subjected to a thermal explosion reaction, the reacted block samples are taken out and cooled to the room temperature, oxidation layers on surfaces of the samples are rubbed off, the block samples without the oxidation layers are broken and subjected to ball milling, powder is obtained, and the high-purity Ti2AlC ceramic material can be obtained after acid treatment, washing and drying. The prepared Ti2AlC ceramic material has stable technological parameters, the method is suitable for large-scale production of the Ti2AlC ceramic material, and the method has the characteristics that the process is simple, the synthesis temperature is low, the preparation time is short and the purity is high.

The invention relates to a method for joint production of potassium sulphate and calcium chloride dihydrate. The method comprises the steps of 1, adding potassium chloride and sulfuric acid to a first reactor, and introducing superheated steam to the first reactor to generate potassium sulphate and vapor containing hydrogen chloride through reaction; 2, introducing the vapor containing hydrogen chloride to a second reactor to generate calcium chloride dihydrate and superheated steam through reaction with calcium oxide or calcium hydroxide, and circulating the superheated steam to the step 1. By the adoption of the method, high energy consumption during production of potassium sulphate and calcium chloride dihydrate is avoided, the byproduct hydrogen chloride is well utilized, and environment pollution is basically avoided.

The invention discloses a method for preparing a polyimide film by microwave radiation at a low temperature. The method comprises the following steps: 1, preparing a polyimide precursor solution to obtain a product A; 2, performing microwave radiation on the product A to obtain a product B; 3, carrying out film spreading treatment on the product B to obtain a product C; 4, heating the product C toobtain a product D; and 5, imidizing the product D by adopting low-temperature microwave radiation at 60-100 DEG C to obtain the finished film. The method can realize the low-temperature complete imidization of the polyimide film only by a low-temperature microwave radiation technology on the premise of not changing or even improving the mechanical and thermal properties of the polyimide film inorder to obtain the polyimide film having excellent performances. The method has the characteristics of facilitation of large-scale production, and ensuring of the performances of the polyimide film.

An arrangement utilizing recirculation for high temperature fuel cell system, each fuel cell including an anode side, a cathode side, and an electrolyte between the anode side and the cathode side, wherein the fuel cell system can perform anode side recirculation flow of reactants. The arrangement can accomplish a recycle ratio of 70% or more for the recirculation flow, feed to the recirculation a feed-in flow, which can include substantially high oxygen content, the feed-in flow being 30% or less of entire flow, perform heat exchanging to provide substantially reduced low temperature conditions in the recirculation flow, perform catalytic partial oxidation in the recirculation flow to produce a substantially high amount of hydrogen for the recirculation flow in fuel cell system start-up or shutdown situations, and exhaust 30% or less of the entire flow from the anode side recirculation.

An artificial coral hydroxy apatitis (CHA) bone for medical purpose is prepared from coral through hydrothermal reaction in the diammonium hydrogen phosphate plus hydrothermal liquid system under high-temp and high-pressure condition to convert the CaCO3 of coral to Ca5(PO4)3(OH) which is just the artificial bone. Its advantages are high compression strength, high porosity (24.86-65.71%), no toxic by-effect and good biologic compatibility.

The present invention relates to a process for the preparation of carbapenem compound of Formula (I), wherein P₁ is hydrogen or a carboxyl protecting group, P₃ is hydrogen or a hydroxyl protecting group, R₁ is C_1-3 alkyl, and A is selected from a group consisting of a) Formula (II), b) Formula (III), c) Formula (IV), d) Formula (V), e) Formula (VI), f) Formula (VII), wherein P₂ is hydrogen or an amino protecting group, R₂ and R₃ may be same or different and are hydrogen, C_1-5 alkyl, optionally substituted aryl, or optionally substituted heteroaryl, and X₁ is O or S, or its stereoisomers, or salts thereof.

The invention relates to an anti-scale water cooling bearing bush. The anti-scale water cooling bearing bush comprises an upper bearing bush and a lower bearing bush fixedly connected; multiple watercooling through holes are formed in the lower bearing bush; water cooling pipes are mounted in all the water cooling through holes; the water cooling pipes comprise water cooling outer pipes whose outer walls are contacted with the inner walls of the water cooling through holes and whose two ends extend out of the water cooling through holes, and water cooling inner pipes arranged in the water cooling outer pipes and whose two ends extend out of the water cooling outer pipes; sealing bodies are arranged between the inner walls of the two ends of the water cooling outer pipes and the outer walls of the water cooling inner pipes, so that the water cooling outer pipes and the water cooling inner pipes are tightly sealed to form first runners; water inlet pipes are arranged on the side walls of one ends of the water cooling outer pipes, and water outlet pipes are arranged on the side walls of the other ends; and second runners are formed in the water cooling inner pipes. Through design ofsleeves on cooling water paths, the overall temperature of cooling water is lowered, the temperature condition of separation of metal salt is weakened, the scaling prevention of the water cooling pipes is realized, and the cooling effect of the bearing bush is guaranteed.

A control device for an automatic transmission includes: a failure diagnosis section for diagnosing whether or not a failure has occurred in a shift control system of the automatic transmission; a fail-safe control section for fixing the automatic transmission into a predetermined gear position in response to confirmation of the failure of the shift control system of the automatic transmission; and an oil temperature rise regulation torque reduction control section for outputting a torque reduction request to suppress torque of a vehicle driving source, based on temperature of transmission operating oil of the automatic transmission, and outputting the torque reduction request in response to satisfaction of an oil temperature condition that is set lower in oil temperature when the automatic transmission is fixed in a first gear position by the fail-safe control section than when the automatic transmission is not fixed in the first gear position.

The production process of raw material medicine of rufluoxin hydrochloride is an improvement on oil technological process, and is aimed at overcome defects of old technological process whose production yield is low, cost is high and by-product can pollute environment. It mainly improves second step and sixth step of old technological process, in second step, in the reaction container the ethyl alcohol, water ammonium chloride are added, iron powder is added while stirring, the dilute hydrochloric acid is slowly added, heated to reflux state, B is dropped in slowly, pH value is retained to 5-6, reacted for 1 hr, then TLC is ued to test reaction end point; and in sixth step, in reaction container the F, boron trifluoride etherate and acetone are added, heated to 58-63 deg.C and reflux reaction is made for 3-3.5 hr. Said invention can reduce production cost and raise product yield.