30results about How to "Avoid exothermic" patented technology

A front end structure includes a front end panel (400) that is configured as a duct structure for preventing the air introduced from a grille opening (452) from bypassing a condenser (200) and a radiator (100). A fan unit (300) is arranged on the most upstream side portion of the structure. As a result, without the need to provide parts making up a separate duct structure, fresh air flow temperature can be blown in, while at the same time, the air that has passed through the condenser (200) can be prevented from bypassing the radiator (100). Thus, the heat releasing capacity of the condenser (200) and the radiator (100) can be improved while simultaneously preventing leakage between the condenser (200) and the radiator (100) without adding complex structure.

A polymer electrolyte fuel cell of the present invention includes: plate-shaped cells (10) each having a pair of plate-shaped separators (6a) and (6b) and a membrane-electrode assembly (5) disposed between the separators (6a) and (6b); a cell stack (50) configured by stacking and fastening the cells (10); and a covering member (60) covering a peripheral surface of the cell stack (50), and voltage measuring terminal insertion holes (61) used to measure the voltages of the cells (10) are formed on the covering member (60) so as to be located at positions corresponding to the separators (6a) and (6b) of the cells (10).

A protection element and a secondary battery device employing the protection element are provided for stably retaining a flux on a soluble conductor at a predetermined position, so as to enable appropriate blowout of the soluble conductor in the event of an abnormality. The protection element has a soluble conductor which is disposed on an insulation baseboard, and which is connected to a power supply path of a device targeted to be protected, and which causes a blowout when a predetermined abnormal electric power, amount is supplied. A flux is coated on a surface of the soluble conductor, and an insulation cover member is mounted on the baseboard and covers the soluble conductor. The protection element also includes a stepped portion for retaining the flux at a predetermined position in contact with the flux, and the stepped portion is formed opposite to the soluble conductor on an interior face of the insulation cover member.

The heater includes a heater main body, a housing storing the heater main body therein, and a coating material arranged in at least a part between the heater main body and the housing and covering at least a part of the heater main body. The coating material is a material containing at least one of ceramic and glass, the heater main body has a cylindrical honeycomb structural portion having partition walls separating and forming a plurality of cells and a pair of electrode portions disposed on a side face of the honeycomb structural portion, the housing contains the heater main body so as to cover the side face side of the heater main body, and the partition walls of the honeycomb structural portion is of a material containing ceramic as the main component and produces heat by energization.

The invention relates to a medicinal preparation characterized by a special physical shape, in particular to a method for preparing adhesive pellets by extrusion and spheronization, which comprises the following steps: (1) sieving a medicament and a filler with a 100-mesh sieve and uniformly mixing the medicament and the filler according to a medicament to filler weigh ratio of 1-2:10-30, adding an adhesive in an amount which is 0.5 to 30 times the weight of the added medicament to prepare a soft material, extruding, spheronizing, drying and sieving with a 24-to-40-mesh sieve, and obtaining the medicament-loaded pellets; or dissolving the medicament in the adhesive in an amount which is 0.5 to 30 times the weight of the medicament, adding the filler according to a medicament to filler weigh ratio of 1-2:10-30 to prepare the soft material, extruding spheronizing, drying and sieving with the 24-to-40-mesh sieve and obtaining the medicament-loaded pellets; and (2), placing the medicament-loaded pellets in a coating pan, adding powdered adhesive according to a medicament to adhesive weigh ratio of 1-2:10-20, wetting by spraying a proper amount of water or ethanol at concentration of 40 to 60 percent, coating the adhesive on the outer layer of the medicinal pellets at the temperature of 65 to 80 DEG C by a powder lamination coating process, placing the pellets in an oven at 40 DEG C and drying the pellets for 12 hours.

The invention provides a Fischer-Tropsch synthesis oil hydrofining method which comprises the following steps: S1, mixing Fischer-Tropsch synthesis oil with hydrogen, carrying out a low-temperature pre-hydrogenation reaction, and converting unsaturated olefins in the Fischer-Tropsch synthesis oil into corresponding saturated hydrocarbons to obtain a pre-hydrogenation product; S2, performing a deephydrodeoxygenation reaction on the pre-hydrogenation product to obtain a hydrofining product; and S3, circulating a part of the hydrofining product, conducting mixing with Fischer-Tropsch synthesis oil, and then carrying out a low-temperature pre-hydrogenation reaction. Through circulation of a part of the hydrofining product, reaction temperature rise can be reduced, coking carbon deposition andinactivation of a catalyst are prevented, stable operation of the reaction is easy to maintain, and a high olefin conversion rate and a high oxygen-containing compound conversion rate are maintainedfor a long time.

The invention provides a reactor for preparing isocyanate and a method of the reactor for preparing isocyanate. The reactor comprises an inner feeding pipe, an outer feeding pipe, a mixer shell, a neck expanding pipe, an auxiliary feeding pipe and a reaction tube, wherein phosgene enters the reactor from the outer feeding pipe and the auxiliary feeding pipe. A coking material in a phosgenation reaction process can be effectively reduced; the running period of the reactor is improved; the conversion rate of the reaction process is improved; and the purity of a reaction liquid is improved.

The invention belongs to the technical field of molecular biology, and provides a biomembrane-alpha proteobacteria quantitative determination method. The method comprises the following steps: making a sample of alpha-proteobacteria, recovering the sample of alpha-proteobacteria, preparing Escherichia coli competent cell, conversing the alpha-proteobacteria sample to competence bacteria; culturing by selecting bacterium of the sample of alpha-proteobacteria, extracting the plasmid of the sample of alpha-proteobacteria, determining the quantification double chain DNA content of alpha-proteobacteria, pretreating the biomembrane sample to be measured; and performing real-time fluorescence quantification PCR detection. The method has the advantages of fast analysis speed, less restriction factor, high accuracy, and reduced subjective factor influence, and provides support for microbe stability of a drinking water system as well as scientific basis for purifying water quality of a feed pipe net.

The invention provides a heavy-duty tire which can prevent rolling resistance increase and improve the wear resistance of the tread part. A heavy-duty tire (1) includes a tread part (2) formed such that, in a tire cross section including tire rotation axis in 5% internal pressure state, the profile (20) of the tread part (2) includes a crown profile (21), and a pair of shoulder profiles (22) extending from outer sides of the crown profile to tread edges. Each of the crown and shoulder profiles has an arc shape convex toward the outer side of the radial direction of the tire. The ratio Rc/Rs of curvature radius (Rc) of the crown profile (21) to curvature radius (Rs) of each shoulder profile (22) is 7.0 or more, and a tire axial direction distance (L1) from a tire equator (C) to a connecting point (23) between the crown profile and each shoulder profile is 0.70 or more times a tread half width (TWh).

A preparation method of a graphene nanoribbon comprises the following steps: preparing a carbon nanowall; mixing the carbon nanowall with a metal intercalation agent in a mol ratio of 1-5:1 in an oxygen-free environment and heating the mixture to 200-1000 DEG C in a vacuum environment, maintaining the temperature, and carrying out reactions for 12-120 hours, so as to obtain a metal intercalation carbon nanowall, wherein the metal intercalation agent is at least one of lithium, sodium, potassium, magnesium, calcium, rubidium, strontium and barium; mixing the metal intercalation carbon nanowall with an ionic liquid in a mass volume ratio of 1 g:10-100 ml, treating the mixture with ultrasonic wave with the power of 2000-10000 W for 0.5-30 minutes, so as to obtain a reaction liquid; and filtering the reaction liquid to obtain the graphene nanoribbon. The graphene nanoribbon prepared by the preparation method has relatively high conductivity.

The invention belongs to the field of material science and engineering, and particularly relates to a preparation method of an anti-corrosion zirconium-based amorphous alloy composite material coating. Zr50.4Cu28Ni9Al12.3 amorphous alloy spherical pre-alloy powder is prepared through a gas atomization powder preparation technology, the surface of the spherical pre-alloy powder is evenly coated with SiC nano powder, SiC and an alloy are subjected to an in-situ reaction in the laser melting cladding process, a strengthening phase is separated out, preparation of the composite coating with the high amorphous phase content is achieved, the excellent corrosion resistance is obtained, and a new technical approach is provided for preparation of the anti-corrosion zirconium-based amorphous alloy composite material coating. According to the preparation method of the anti-corrosion zirconium-based amorphous alloy composite material coating, preparation of the composite coating with the high amorphous content can be effectively achieved, excellent corrosion resistance is obtained, and the beneficial effects of being wide in application range and low in cost are achieved.

The present invention provides a test method for content of reducing sugar in an ionic liquid system. The method comprises the following steps of: (1) establishing an unitary linear regression equation of the absorbance and the ionic liquid concentration; (2) determining the optimal ionic liquid concentration CI of noninterference reducing sugar test; (3) establishing an unitary linear regressionequation of the absorbance and the glucose concentration; (4) testing the absorbance when the concentration of the ionic liquid to be tested is CI, and substituting the absorbance into the equation obtained in the step (3) to calculate the concentration CS of the reducing sugar; and (5) making the weight percentage content of the reducing sugar in the ionic liquid to be tested [Omega] (%)=CS/CI*100%. The test method is suitable for various ionic liquid systems, is wide in application range and high in analysis result accuracy, does not need separation of the reducing sugar in the ionic liquid,is simple and fast in operation and high in detection sensitivity, and has important guiding significance for recycle of the ionic liquid and the separation of the reducing sugar.

The invention discloses a method for synthesizing 3, 6-dibromo-9-bromophenyl-9H-carbazole, and belongs to the technical field of chemistry. The synthesis method comprises the following steps: dissolving N-phenyl carbazole and a bromination reagent in an organic solvent at room temperature, performing stirring, adding an oxidant, performing reacting for 4-8 hours, recovering the solvent after the reaction is finished, performing extracting, desolventizing and recrystallizing an organic layer to obtain 3, 6-dibromo-9-bromophenyl-9H-carbazole, and controlling the temperature of the reaction system to be lower than the boiling point of the organic solvent. According to the preparation method, a one-step method is adopted at room temperature, commercially available N-phenylcarbazole is used asa raw material, under the action of a bromination reagent and an oxidizing agent, tribromo NPC can be obtained with high yield and high purity, and the method is mild and simple in condition, simple to operate, low in cost, high in yield and beneficial to industrial production of enterprises.

The invention provides a preparation method of 1, 1-bis (tert-butylperoxy)-3, 3, 5-trimethylcyclohexane, which comprises the following steps of: mixing tert-butyl hydroperoxide, a desensitizer, solid acid and a phase transfer catalyst, then adding 3, 3, 5-trimethylcyclohexanone, carrying out a chemical reaction on 3, 3, 5-trimethylcyclohexanone and tert-butyl hydroperoxide in the presence of the solid acid to generate 1, 1-bis (tert-butylperoxy)-3, 3, 5-trimethylcyclohexane, then filtering, carrying out liquid separation treatment on a filtrate, and sequentially carrying out alkali washing, water washing and drying to obtain a finished product, namely, 1, 1-bis (tert-butylperoxy)-3, 3, 5-trimethylcyclohexane. According to the method, the reaction time is short, the product yield is increased, the yield is 85%-95%, dangerous factors in the production process are reduced, the product stability is improved, the product is a colorless transparent solution, generated wastewater is easy to treat, and industrial production is easy.