33results about How to "Mild working conditions" patented technology

The invention relates to a method for extracting tea saponin and tea-seed oil from tea seed kernels by using a biological method. The amount of each added material is based on the weight of the tea seed kernels, and the method comprises the following steps of: cooking the tea seed kernels, crushing, liquefying and saccharifying, adjusting the pH, and performing centrifugation; for the obtained supernatant oil comprising the main components of fat and oligosaccharide, performing membrane separation to obtain crude oil, and performing alkaline refining de-acidification to obtain refined tea oil; for the subnatant water phase comprising the main components of saponin and protein, adjusting the pH, and then performing centrifugation to obtain crude tea saponin; and performing decontaminating concentration by using an ultrafiltration membrane to obtain refined tea saponin. According to the method, the tea seed kernels are reasonably used to extract the tea-seed oil and the tea saponin at the same time, the process is simple, the operation is safe, high-purity tea oil and saponin are obtained, and simultaneously secondary pollution and a great deal of wastewater cannot be generated.

The invention relates to an extraction and preparation method for licorice effective ingredients, mainly to a method for simultaneously extracting effective ingredients like glycyrrhizic acid, glycyrrhiza flavonoid and a licorice flavoring agent from licorice. The method comprises the following steps: with glycyrrhizic acid as a raw material, carrying out extraction so as to obtain licorice residue and extract liquid and subjecting the licorice residue to ethanol extraction so as to obtain a crude glycyrrhiza flavonoid product; removing impurities in the licorice extract liquid by using an ultrafiltration membrane device, carrying out concentration by using a nanofiltration membrane device, subjecting a nanofiltration membrane concentrate to acid precipitation and drying a precipitate so as to obtain glycyrrhizic acid; and subjecting a supernatant produced after acid precipitation to concentration with the nanofiltration membrane device and carrying out drying so as to obtain the licorice flavoring agent. The method adopts membrane separation technology for impurity removal and concentration of the extract liquid, so working conditions are mild, product purity and quality are guaranteed, and yield of licorice effective ingredients is high; the method has the advantages of simple production flow, low cost, small pollution, reusability of a nanofiltration membrane filtrate generated in production process, reduction in consumption of raw water and great decrease of waste water discharge.

The invention relates to a method for separating ultra-fine particles, wherein it adjusts the components of dual-liquid system, or adds extractive to adjust the system which can separate ultra-fine particles into upper phase or lower phase; eccentrically treating two phases to obtain ultra-fine particles. And the inventive system can be repeated used. The invention has simple device and low cost.

The invention relates to a direct drinking water purifying method and a direct drinking water purifying device. The direct drinking water purifying method comprises three-stage treatment steps, namely active carbon adsorption, ultra-filtration film filtration and ultraviolet sterilization in turn. The direct drinking water purifying device comprises a shell, and a water inlet and a water outlet which are connected on the shell; and the device also comprises a first-stage carbon adsorption treatment device, a second-stage ultra-filtration film treatment device and a third-stage ultraviolet treatment device. The method and the device can effectively solve the problems of poor trace pollutant removing effect, secondary pipeline pollution and the like in the conventional drinking water treatment process through a technique with low energy consumption and low cost.

The invention provides a method for preparing a bismuth vanadate-polyacid gas sensing composite nano-material. A prepared polyacid modified bismuth vanadate nano-rod composite gas sensitive material can be used in a photoelectric gas sensor. The gas sensitive material is a bismuth vanadate-polyacid composite nano-material which is formed by using a bismuth vanadate nano-rod as a main body and modifying with Keggin-type phosphotungstic acid. In a room temperature environment, under irradiation of a xenon lamp, the sensor has a remarkable sensing detection function for toxic nitrogen dioxide gas. The method for preparing the bismuth vanadate-polyacid gas sensing composite nano-material is simple, has low cost, can be used for effectively detecting low-concentration nitrogen dioxide gas in the air at room temperature, and is applicable to development and production of a novel high-performance gas sensor.

The invention relates to a method for collecting lactic acid from zymotic fluid, and comprises the steps as follows: the proper double aqueous phase system is selected to adjust the distribution of the lactic acid and the lactobacillus in the double aqueous phase system, the lactic acid is distributed at a polymer-rich phase, and the lactobacillus is distributed at a salt-rich phase to achieve the lactic acid collecting. The selected double aqueous phase system is a neutral extracting system close to the PH valve of 5.5 to 6.0 required by zymolysis of the lactic acid, the finished product is separated from the reacting matters. The phase separation provides a reaction power for the zymolysis of the lactic acid, so that the invention is beneficial to improve the productivity of the lactic acid. Moreover, the method disclosed in the invention can be coupled with the zymotic method of the lactic acid to reform the prior separating method of the lactic acid.

The invention relates to a method for producing purely natural monosodium glutamate by using low-value marine fishes, which comprises the following steps of: adding water in an amount which is 1 to 3 times the weight of low-value marine fishes, and 0.01 to 0.03 weight percent of antioxidant into the low-value marine fishes; raising the temperature to 60 to 80 DEG C, stirring at the pH of 7 to 9 for 1 to 3 hours, adding 0.3 to 0.5 weight percent of alkaline protease and performing enzymolysis at the temperature of between 45 and 60 DEG C and the pH of 7 to 9 for 2 to 4 hours; filtering to remove fish bones and centrifuging to remove fish oil and fish scrap; adding 0.3 to 0.5 weight percent of flavorzyme into filtrate and performing enzymolysis at the temperature of between 45 and 60 DEG C and the pH of 6 to 8 for 2 to 4 hours; heating to 100 DEG C after the enzymolysis is finished, and inactivating for 5 minutes; regulating the pH of enzymolysis liquid to 5 to 6.5 by using citric acid, adding 1 to 3 weight percent of activated carbon, stirring at the temperature of between 60 and 75 DEG C for 2 to 3 hours, centrifuging and filtering; removing impurities from filtrate by using an ultrafiltration membrane of about 2,000Dal and concentrating the filtrate by using a nanofiltration membrane of about 400Dal in turn; and adding 0.1 to 0.3 weight percent of flavor substances and 0.2 to 0.5 weight percent of truffle into concentrated solution, dissolving, uniformly mixing and performing spray drying. The low-value marine fishes are reasonably utilized, the process is simple, secondary pollution is avoided and a large amount of waste water cannot be generated.

The invention relates to a comprehensive utilization method of a pumpkin. In the method, added amount of substances is based on weight of the pumpkin; and the pumpkin is taken as a raw material for step-by-step extraction to respectively obtain pumpkin polysaccharide, pectin and pumpkin powder by utilizing a biotechnology and a membrane separation technology. The method comprises the following steps: firstly washing and cutting the pumpkin into blocks, removing seeds, pulping, carrying out water extraction at moderate temperature and centrifugal separation, carrying out acid precipitation on the obtained water extract, concentrating the obtained supernate through a nanofiltration membrane, and spray-drying to obtain the polysaccharide; extracting residues after water extraction by utilizing acid water, carrying out centrifugal separation, removing impurities from the obtained supernate through a microfiltration membrane, concentrating the supernate through a nanofiltration membrane, carrying out acid precipitation on the obtained concentrated solution, carrying out centrifugal separation, and freeze-drying the obtained precipitate to obtain the pectin; spray-drying the supernate to obtain the polysaccharide; and mixing the remaining residues and filtered liquor, grinding by a colloid mill and spray-drying to obtain the pumpkin powder. The comprehensive utilization method has the advantages that effective substances of the pumpkin are fully utilized, and process is simple and feasible, thus being applicable to industrialized production.

The invention discloses a bismuth sulfide mineral inhibiting agent and application thereof. The inhibiting agent comprises the following components in parts by mass: 2-5 parts of hydrogen peroxide, 3-4 parts of gallic acid, and 1-2 parts of dextrin. In a flotation process of sulfide minerals containing bismuth, 50-500 g/t combined inhibiting agent is added in each flotation according to each tonnage of raw ore minerals, so that the inhibition of the sulfide minerals containing bismuth can be realized. The bismuth sulfide mineral inhibiting agent has the advantages of high acting effect, low use level and the like, is free of using such high-consumption medicaments as poisonous cyanides, lime and sodium sulfide to reduce environmental pollution, meanwhile, reduces the beneficiation cost, and improves the sorting index.

The invention relates to a preparation method of seafood flavor peptide. The preparation method comprises the following steps: heating the mixture of raw materials and water; mixing the heated mixture with bacillus, then fermenting the mixture with bacillus to obtain a fermented mixture; carrying out slurry-residue separation and oil-water separation to obtain a fermentation liquor; decolorizing and deodorizing the fermentation liquor, then removing residues and carrying out decarbonizing, and performing refining, concentrating and drying to obtain the flavor peptide. The preparation method disclosed by the invention is wide in raw material resource, low in production cost, mild in working conditions and capable of ensuring the protein content and low salt content of the product.

The invention provides an indium oxide-polyacid composite gas sensing material and a preparation method thereof. The prepared polyacid modified indium oxide nanofiber new material can be used for a semiconductor type gas sensor. The material is an indium oxide-polyacid nano composite material formed by taking indium oxide (In2O3) nano fibers as a main body and modifying with Keggin type phosphotungstic acid. In a room temperature environment, the sensor has obvious sensing detection performance on toxic formaldehyde gas. The indium oxide-polyacid composite material provided by the invention issimple in preparation method and very low in cost, can effectively detect low-concentration formaldehyde gas in air at room temperature, and is suitable for development and production of a novel high-performance gas sensor.

The invention relates to an isostatic pressing machine, particularly relates to a warm isostatic pressing machine, and solves the problems that an existing warm isostatic pressing machine is complex in structure, low in efficiency, large in energy consumption and poor in working condition. The warm isostatic pressing machine comprises a rack, wherein a pressurizing oil cylinder is installed on an upper beam of the rack, a high-pressure cavity located under the pressurizing oil cylinder is installed on a lower beam of the rack, a piston rod of the pressurizing oil cylinder can be inserted into the high-pressure cavity in a sealed mode, a heat conduction tank is also included and filled with heat conduction oil, an electric heater is arranged in the heat conduction tank, an oil injection hole is formed in the bottom of the high-pressure cavity, an oil return hole is formed in the top of the high-pressure cavity, and the heat conduction tank communicates with the high-pressure cavity through a heat conduction pump, a one-way valve and the oil injection hole by means of a pipeline and further communicates with the high-pressure cavity through an oil return pipe and the oil return hole. The warm isostatic pressing machine is technically characterized in that the mode that the high-pressure cavity of the isostatic pressing machine obtains high pressure is changed into a direct pressurization mode from an injection mode, and defects of an existing warm isostatic pressing machine are overcome.

The invention relates to a method for demulsifying and purifying plant crude oil. The method comprises the steps of separating in a process of extracting oil through an aqueous enzymatic method or an aqueous dissolving method to obtain a demulsified crude oil; adding PAM to evenly mix, and separating through a film to obtain demulsified, purified and refined oil, wherein the prepared protein isolate can be used as feed. The method is fine in process, simple in steps and capable of making full use of plant protein while obtaining high-purity plant oil.

The invention relates to a biological oil removing agent for permanent-magnet materials. The biological oil removing agent is prepared according to the following steps: diluting the biological oil removing agent with water in the volume ratio of 1:(19-99) to obtain a diluent; and regulating the pH value of the diluent to 6.0-9.0 by using two of phosphoric acid, citric acid, sodium citrate and trisodium phosphate, and keeping the temperature of the diluent at 10-40 DEG C for later use. The biological oil removing agent can be used for thoroughly removing oil stains in the permanent-magnet material under the condition of mild pH value without generating substances harmful to the environment. The biological oil removing agent is environment-friendly. Meanwhile, microbes in the biological oil removing agent are cheap and are easy to obtain, and the biological oil removing agent has strong continuous oil removal capability, therefore, the oil removal cost can be greatly lowered by using the biological oil removing agent.

The invention provides a train de-icing device and method, belongs to the technical field of train de-icing, and particularly relates to a train de-icing device and method. The problems that existingde-icing technologies for trains have the disadvantages of large energy consumption, high de-icing requirements, great impact force on the trains, low efficiency, and inconvenient operation and control are solved. The train de-icing device comprises an air outlet mechanism, a heating mechanism, an air supplying mechanism, an air supplying header pipe and an air supplying branch pipe. The train de-icing device and method are mainly used for de-icing the bottom and side frozen trains in cold areas.

A method of preparing water free isothiazolone having the steps of obtaining an extract from an aqueous solution containing isothiazolone by using a halogenationed hydrocarbon or nitrated hydrocarbon, removing the halogenationed hydrocarbon or nitrated hydrocarbon from the extract, and adding a organic solvent such as glycol, alcohol and glycol ether provides a water free isothiazolone having a high stability without forming wastes and harmful gas.

The invention relates to a method for extracting lithium from a high-calcium lithium-containing raw material, which comprises the following steps: (1) calcium precipitation: adding the calcium-containing lithium-containing raw material into a reaction container, adding a calcium precipitator, stirring to generate calcium sulfate crystals, and carrying out solid-liquid separation to obtain a decalcified lithium-containing mother solution; (2) nanofiltration: carrying out nanofiltration on the decalcified lithium-containing mother liquor obtained in the step (1) through a nanofiltration system to further decalcify and remove other ions greater than or equal to 2 so as to obtain lithium-containing filtrate; and (3) evaporating and concentrating: evaporating and concentrating the lithium-containing filtrate obtained in the step (2) to obtain a lithium-rich concentrated solution. The method has the advantages of simple operation steps, mild working conditions, low energy consumption, safe operation and less environmental pollution; and the whole operation process is carried out according to safe, energy-saving and environment-friendly conditions. The method is suitable for extracting lithium from various calcium-containing and lithium-containing raw materials, is low in production cost, and is particularly suitable for extracting lithium from high-calcium and lithium-containing raw materials.