32results about How to "Low critical temperature" patented technology

The invention discloses a method for harmlessly debrominating bromine-containing plastic waste. The method comprises the following steps: a, pre-processing raw materials; b, performing debromination reaction under high pressure at a high temperature; c, post-processing. The method achieves the following technical goals: firstly, the critical pressure and critical temperature of ammonia water are much lower than those of water, the reaction conditions are gentle, the energy consumption is relatively low, and the reaction is easy to control; secondly, hydroxy radicals which are dissociated in reaction by utilizing the ammonia water are used for neutralizing acidy substances in a reaction process, so that the corrosion of a reaction product to the equipment is avoided; thirdly, ammonium radical ions which are dissociated in reaction by utilizing the ammonia water are used for catching bromine produced in the reaction, so that the debrominating efficiency is further improved.

A substrate processing method and apparatus for preventing evaporation of an anti-drying fluorine-containing organic solvent from a substrate during transportation of the substrate into a processing container and can prevent decomposition of a fluorine-containing organic solvent in the processing container. A substrate, the surface of which is covered with a first fluorine-containing organic solvent, is carried into a processing container. The first fluorine-containing organic solvent is removed from the substrate surface by forming a high-pressure fluid atmosphere of a mixture of the first fluorine-containing organic solvent and a second fluorine-containing organic solvent, having a lower boiling point than the first fluorine-containing organic solvent, in the processing container e.g. by supplying a high-pressure fluid of the second fluorine-containing organic solvent into the processing container. Thereafter, a fluid in the state of a high-pressure fluid or a gas is discharged from the processing container to obtain the substrate in the dried state.

The invention provides a quaternary mixed refrigerant and relates to the technical field of refrigerants. The quaternary mixed refrigerant includes: propane, dimethyl ether, propylene and trifluoroiodomethane. In the refrigerant of the present invention, propane, propylene, dimethyl ether and iodotrifluoromethane are compounds that do not contain chlorine atoms, thus will not destroy the ozone layer, and the refrigerant will not produce a greenhouse effect and meet environmental protection requirements, thus becoming an alternative The preferred choice for existing chlorofluoromethane refrigerants.

The invention discloses a breeding method of an anthocyanin-rich black rice thermo-sensitive two-line sterile line and belongs to the technical field of special rice breeding. The method comprises the following steps: taking black rice with the brown rice anthocyanin color value which is more than 20 as a male parent, and taking a thermo-sensitive two-line sterile line as a female parent, and carrying out artificial hybridization; selecting single plants which has the brown rice anthocyanin color value more than 20, stable fertility, low critical temperature, long stable sterile period, thick and strong plant stalks, strong tillering, up-right leaves, small leaf angles and many spike grains in each generation from the generation F2; and finally, breeding to form the anthocyanin-rich black rice thermo-sensitive two-line sterile line. By virtue of the method, the foundation is laid for the assembling of hybrid black rice high-quality seeds which are rich in anthocyanin and have stable yield and high yield. The bred sterile line is used for breeding hybrid black rice varieties so that the bred hybrid black rice has good plant shape, high yield and stable yield; and the brown rice has bright color and luster, is dull black and is rich in anthocyanin, and has advantages of hybrids.

The invention relates to a supercritical extracting and drying method in a process of preparing ultrahigh molecular weight polyethylene filber (UHMWPE), including: the fiber molded after cooled and solidified drops in an extraction kettle, and is arranged regularly; feeding extractant into the extraction kettle for supercritical extraction; after extraction complete, feeding hot gas in to dry; or drying in a vacuumizing mode; wherein the mentioned extractant is selected from one of methane, ethane, ethane, and propylene. The invention adopts supercritical extraction method to remove the first solution added in a solution preparing process, and the extracting and drying arts are completed in one device, simplifying the process.

The invention discloses green carbon dioxide supercritical fluid semiconductor cleaning equipment which is used for cleaning semiconductor silicon wafers without water. The equipment comprises a main working chamber for carrying out supercritical fluid cleaning and supercritical drying, a separating chamber for separating carbon dioxide and cleaning waste liquid, a temporary storing tank for storing a cleaning agent for enhancing the cleaning effect and a cosolvent, a carbon dioxide circulation control system for compressing, cooling and storing the carbon dioxide, and the like. all parts areconnected by a pipeline with a valve. Under the cooperation of a small amount of organic solvent, the carbon dioxide without surface tension is taken as a cleaning medium and a rinsing solution to godeep into tiny holes to obtain good cleaning and drying effects. By utilizing the equipment, massive consumption of pure water and the pollution brought by chemical agents are avoided, and the problems of structure deformation, particle adsorption and the like caused by the surface tension in the traditional process are solved, and the cycle use of the carbon dioxide reduces the massive dischargeof greenhouse gases.

The invention relates to a preparation method of lead-free silver electrode slurry for a low-temperature PTC temperature-sensitive electronic component. The preparation method comprises the steps of the preparation of low-temperature micron glass powder, the preparation of an organic carrier and the preparation of silver conductor slurry. According to the preparation of the low-temperature micron glass powder, components in mass percentage of 25 to 85% of Bi2O3, 5 to 35% of B2O3, 2 to 10% of ZnO, 2 to 5% of SnO, 1 to 5% of Al2O3, 3 to 10% of TeO2, 1 to 5% of BaO and 1 to 5% of TiO2 are selected; the raw materials are weighed according to proportions, the raw materials are subjected to ball milling of a planetary ball mill for 60 to 90 minutes with ethyl alcohol adopted as a medium, and obtained products are uniformly mixed, an obtained mixture is dried, so that a uniformly-mixed oxide can be obtained; the mixture is melt in a high-temperature sintering furnace; the melt mixture is poured into deionized water, so that a large-particle glass crude product is obtained, the product is dried under 80 to 95 DEG C, the dried large-particle glass crude product is arranged in a ball-milling tank so as to be subjected to ball milling of the planetary ball mill, and the ratio of the glass crude product to pure water to zirconia spheres of which the diameter phi is 1mm is 1:2:2; and after the large-particle glass crude product is subjected to ball milling for 8 to 12 hours, an obtained product passes through a 300-mesh screen, so that the low-temperature lead-free glass powder of which the particle size ranges from 0.7 to 1 . 5 microns can be obtained. The lead-free glass powder obtained by the using the preparation method of the invention has the advantages of low softening temperature, high bonding strength, narrow distribution, small particle size and high consistency.

The invention discloses sub-high temperature vulcanized solid sound-transmitting rubber and a preparation method thereof. The method comprises: plasticizing the sound-transmitting rubber in an open mill; blending the rubber; adding magnesium oxide and a tetramethylthiuram disulfide (TMTD) promoter in turn, then adding stearic acid, carbon black, talcpowder and an anti-aging agent A and finally adding zinc oxide and a promoter A; thinning the rubber and loading sheets and obtaining unvulcanized rubber sheets; and vulcanizing the rubber sheets at 90 to 100 DEG C and obtaining the solid sound-transmitting rubber. According to the invention, the promoter A which is thiourea is used to reduce the critical temperature of the vulcanization of the rubber; the TMTD promoter accelerates vulcanization, and the acidic characteristic of the promoter prolongs the scorching time of the rubber to prevent the rubber from scorching in a blending process; the vulcanization at a sub-high temperature of 90 to 100 DEG C is convenient with an infrared lamp as a heat source; and the sound-transmitting rubber is used on equipment susceptible to high temperature and large equipment and can be maintained on site.

The invention discloses a method for preparing bio-oil enriched in aromatic compounds through a supercritical mixed organic solvent liquefied lignin. The method comprises the following steps: adding alkali lignin and a low-molecule organic solvent under supercritical conditions to a pressure-resistant container with a magnetic stirring device, reacting under the conditions of the temperature of 280-340 DEG C and the pressure of 8.8-16.0MPa for 0-120 minutes, cooling to room temperature, and collecting the product, thereby obtaining the bio-oil, wherein a ratio of the usage amount of the alkali lignin to the mixed solvent is (1-3g):(60-120mL). According to the method disclosed by the invention, the supercritical mixed low-molecule organic solvent and the like are taken as reaction media, the concentration and activity of hydroxyl and hydrogen group produced in a supercritical state can be greatly improved along with rise of the reaction temperature, and the hydroxyl and hydrogen group have obvious effects of promoting liquefied conversion from the lignin to the bio-oil. Moreover, the method is mild in reaction conditions, low in performance requirements of equipment materials, economic in price, high in application and popularization properties and high in yield of the aromatic compounds in the bio-oil.