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35results about How to "Condition control is simple" patented technology

Method for treating waste water containing acid and ammonia

The invention relates to an energy-saving type two-tower stripping method for treating waste water containing acid gas and ammonia, which belongs to the technical field of waste water treatment. The method comprises the following steps of: dividing the waste water which is to be treated and contains acid and ammonia into a cold part and a hot part, and respectively introducing the cold part and the hot part into a deacidification tower from the upper part and the middle upper part of the deacidification tower of a stripping type waste water treatment device, wherein acid gas is introduced into an acid recoverer after being stripped from the top of the deacidification tower; collecting kettle liquid waste water from the bottom of the deacidification tower; introducing the kettle liquid waste water into a deamination tower from the middle upper part of the deamination tower so that ammoniac steam is stripped from the top of the deamination tower; meanwhile, collecting kettle liquid from the bottom of the deamination tower. The heat used by a tower kettle reboiler is derived from the ammoniac steam extracted from the deamination tower; the sulfur residue quantity of the treated waste water is lower than 50mg / L, and the total ammonia content is lower than 100mg / L; and the method provided by the invention has the advantages of simple and easily controlled process, mature technology, low processing cost and energy saving and can be widely applied to various occasions for treating the waste water containing acid and ammonia.
Owner:QINGDAO JUNYANG CHEM TECH

Ultraphonic elastic imaging body model and preparation method thereof

The invention relates to an ultraphonic elastic imaging body model comprising polyacrylamide hydrogel and a scatterer, wherein the polyacrylamide hydrogel forms a reticular structure to wrap the scatterer. The elasticity (or the rigidity) of the ultraphonic elastic imaging body model can be freely regulated within a larger range by regulating the concentration of an acrylamide monomer and the sound attenuation coefficient can be changed to accord with the standard of ultraphonic elastic imaging by regulating the proportion of the scatterer.
Owner:SHENZHEN HUIKANG PRECISION APP

Preparation method of superconductive, thermally-conductive, ultrahigh-strength graphene composite film

The invention relates to a preparation method of a superconductive, thermally-conductive, ultrahigh-strength graphene composite film, which comprises the following steps: step 1, mixing 10%-80% by mass of nanometer graphene and 20%-90% by mass of liquid or powdery bridging carbon groups in a nitrogen-filling mixer at room temperature for 1-10 hours; step 2, pumping the mixed materials into a heating box by a vacuum pump, heating the materials to 100-500 DEG C for 1-20 hours; step 3, after heating, allowing the mixed materials to fall freely into a material distribution zone, uniformly spreading out the mixed materials by a scraper and a material-distributing roller, feeding the materials into a pre-press roller with a controlled pressure of 0.1-1.0 Mpa, pressing the materials tightly with several groups of press rollers so as to pull out a composite film with a thickness less than 100 microns; step 4, scanning the composite film line by line through a laser beam, an electron beam or an ion beam to allow the temperature of the scanned part of the composite film to be above 3000 DEG C so as to realize carbonization, graphitization, crystal growth, and the perfect combination of the molecular skeleton of nanometer graphene and the molecular skeleton of the bridging carbon groups; step 5, trimming the scanned composite film and rolling up. The invention has simple and compact steps, and can realize production with high efficiency by one continuous apparatus.
Owner:耿世达

Method for detecting photochemical activity of carbon nano tube by utilizing transient absorption spectrum technology

The invention relates to a method for detecting photochemical activity of a carbon nano tube by utilizing a transient absorption spectrum technology and belongs to the field of photochemical activity detection of carbon nano tubes. The method comprises the following steps: a, preparing aqueous solution of the carbon nano tube, ultrasonically treating the aqueous solution of the carbon nano tube, standing, and taking supernatant liquid of the aqueous solution of the carbon nano tube as a detection object; b, analyzing photochemical properties of the aqueous solution of the carbon nano tube under illumination conditions by utilizing a laser flash photolysis instrument; and c, verifying and analyzing a characteristic peak of the transient absorption spectrum of the carbon nano tube obtained by the laser flash photolysis instrument in step b by utilizing a pulse radiolysis device. According to the detection method, aiming at a special carbon-based nano material such as the carbon nano tube, the photochemical activity particles in the aqueous solution can be conveniently and reliably detected, the carbon nano tube is insensitive to interference of an external environment, and a carbon nano tube sample is not required to be excessively modified and treated in the earlier stage.
Owner:NANJING UNIV

Zn-added lithium ion battery cathode material and preparation method thereof

The invention discloses a Zn-added lithium ion battery cathode material and a preparation method thereof. The cathode material is prepared by using FeC2O4.2H2O, Li2CO3, NP4H2PO4 and Zn as raw materials. The preparation method includes: mixing the raw materials according to a certain proportion; putting a mixture together with a proper amount of sucrose and steel balls into a ball milling tank for ball milling under dispersing protection of acetone; air-drying powder after ball milling, performing vacuum sealing, placing at high temperature for calcining, and obtaining the Zn-added lithium ion battery cathode material after calcining reaction. The preparation method is simple in condition control and easy in industrialization.
Owner:李梦思

Pharmaceutical preparation containing low molecular weight xanthan gum for intra-articular injection and preparation method of pharmaceutical preparation

The invention discloses a pharmaceutical preparation containing low molecular weight xanthan gum for intra-articular injection. The pharmaceutical preparation contains the low molecular weight xanthan gum, has the relative molecular mass of 0.1-1.99million, has the content of 0.01-5% (w / v), and has an osmotic pressure of 200-400 mOsmol / L and a pH value of 5.5-9. The pharmaceutical preparation containing low molecular weight xanthan gum for intra-articular injection is obtained by the following preparation method: regulating the pH value of raw xanthan gum aqueous solution with the concentration of 1-10% and the relative molecular weight of 3 million to 5-10, adding the solution into a high-pressure reactor, stirring under a certain pressure and temperature for reacting, precipitating the product by using absolute ethyl alcohol, washing, drying so as to obtain the xanthan gum with the relative molecular mass of 0.1-1.99million; and uniformly mixing the xanthan gum and other components, thereby obtaining the preparation. The pharmaceutical preparation containing low molecular weight xanthan gum for intra-articular injection disclosed by the invention can be applied to improving and treating rheumatic arthritis, rheumatoid arthritis, osteoarthritis, synovitis and / or cartilage injury and has the advantages of long in-vivo retention time, capacity of being discharged out of the body through degradable and metabolic pathways and high safety.
Owner:SHANDONG ACADEMY OF PHARMACEUTICAL SCIENCES +1

Modification process of lithium ion battery cathode material

The invention discloses a modification process of a lithium ion battery cathode material. According to the process, firstly, FeC2O4.2H2O, Li2CO3, NH4H2PO4 and Zn are mixed according to a certain proportion and then are contained in a ball-milling tank with a proper amount of sucrose and steel balls, ball-milling is performed under dispersing protection of acetone, powder is aired after ball milling, vacuum sealing is performed, the power is calcined at high temperature, and the lithium ion battery cathode material where Zn is added can be obtained after a calcining reaction. According to the preparation method, condition control is easy, and industrial production can be achieved easily.
Owner:李梦思

Preparation of degradable gasification anti-rust film

The invention relates to a preparation method of degradable vaporability antirust film which can prevent metal corrosion. Mixed raw material is prepared by that sodium benzoate, dextrin, benzotriazole and colloid with the weight proportion of 8:8:6:1 are put into a mixing machine to be stirred and mixed for 20 minutes; the mixed raw material is crushed to be 350 meshes so as to obtain the grain mixed raw material; furthermore, the grain mixed raw material, nanometre copper powders, polyvinyl ester and zinc stearate with the weight proportion of 23:5:7:3 are put into the mixing machine to be stirred and mixed for 30 minutes so as to obtain the secondary mixed raw material; low-density polyethylene of 130-140 times (by weight) is put into the secondary mixed raw material, both of which are mixed for 30 minutes under the temperature control condition to obtain a PE mixture; finally, the PE mixture is put into a film blower to blow out the degradable vaporability antirust film with the thickness of 0.1mm by controlling the film-blowing temperature; the preparation method of the invention has the advantages of simple preparation technology, easy condition control, easily-gained raw material, low preparation cost and good product quality.
Owner:金健汉 +2

Method for treating waste water containing acid and ammonia

The invention relates to an energy-saving type two-tower stripping method for treating waste water containing acid gas and ammonia, which belongs to the technical field of waste water treatment. The method comprises the following steps of: dividing the waste water which is to be treated and contains acid and ammonia into a cold part and a hot part, and respectively introducing the cold part and the hot part into a deacidification tower from the upper part and the middle upper part of the deacidification tower of a stripping type waste water treatment device, wherein acid gas is introduced into an acid recoverer after being stripped from the top of the deacidification tower; collecting kettle liquid waste water from the bottom of the deacidification tower; introducing the kettle liquid waste water into a deamination tower from the middle upper part of the deamination tower so that ammoniac steam is stripped from the top of the deamination tower; meanwhile, collecting kettle liquid from the bottom of the deamination tower. The heat used by a tower kettle reboiler is derived from the ammoniac steam extracted from the deamination tower; the sulfur residue quantity of the treated waste water is lower than 50mg / L, and the total ammonia content is lower than 100mg / L; and the method provided by the invention has the advantages of simple and easily controlled process, mature technology, low processing cost and energy saving and can be widely applied to various occasions for treating the waste water containing acid and ammonia.
Owner:QINGDAO JUNYANG CHEM TECH

Preparation method and surface modification method of molybdenum modified iron oxide photoelectrode

The invention provides a preparation method and surface modification method of a molybdenum modified iron oxide photoelectrode. The preparation method comprises the following steps that a FTO conductive glass with the upward conductive face is placed into a reaction kettle, and a precursor solution with the molybdenum element is added into the reaction kettle; the reaction kettle is heated for 4-7h at the temperature of 80-180 DEG C, and the FTO conductive glass is taken out after the reaction kettle finishes heating and is cooled; the FTO conductive glass is obliquely placed into the reactionkettle containing inorganic salt of iron and a mineralizing agent solution, the reaction kettle is heated for 2-5h at the temperature of 60-100 DEG C, and the FTO conductive glass is taken out afterthe reaction kettle finishes heating and is cooled; and the FTO conductive glass annealed for 1-3h at the temperature of 500-600 DEG C and annealed or 10-30min at the temperature of 700-800 DEG C, andtherefore the molybdenum modified iron oxide photoelectrode grows on the FTO conductive glass. By means of the preparation method and the surface modification method, the photocurrent density of theFe2O3 photoelectrode is greatly improved, the initial voltage is reduced, and therefore the photoelectrocatalysis performance of the photoelectrode is greatly improved.
Owner:SUZHOU UNIV

Method for improving activity of lignin-degrading enzyme generated by phanerochaete chrysosporium after enzyme activity decay

The invention discloses a method for improving the activity of lignin-degrading enzyme generated by phanerochaete chrysosporium after enzyme activity decay. The method comprises the following steps: fermenting the phanerochaete chrysosporium in a carbon-limiting culture medium, and adding glucose to a fermentation system when a carbon source is used up, so that the activity of the lignin-degrading enzyme generated by the phanerochaete chrysosporium is improved after decay. According to the method, the recovery of the lignin-degrading enzyme activity can be realized only by adding an appropriate amount of glucose to the culturing system, the conditions are easy to control, and the method is suitable for the stable production and practical degradation of the lignin-degrading enzyme generated by phanerochaete chrysosporium.
Owner:TSINGHUA UNIV

Chelated surfacant

This invention relates to a chelating surface activator, which belongs to fine chemistry technology field. The chemical constitutional formula is the right one, wherein X2=O,R2=H,X1=O or N,R1=aliphatic hydrocarbon radical; or X1=O, R1=H,X2=O or N,R2aliphatic hydrocarbon radical. The surface activator has good surface activity and chelating ability at the same time; it can improve the salt endurance and hard water resistance greatly when companied with other surface activity.
Owner:长春师范学院 +2

Treatment method of ultraviolet-resistant aromatic high-performance fiber

ActiveCN106436311AAchieve dyeingLong-lasting anti-ultraviolet functionLight resistant fibresDyeing processFiberHigh pressure
The invention discloses a treatment method of an ultraviolet-resistant aromatic high-performance fiber. The method comprises the steps that an ultraviolet-resistant treating agent is prepared into a treating solution with the bath ratio of 15-50 to 1 according to the fiber weight of 1.5-5%, even stirring is performed, the pH of the ultraviolet-resistant treating agent is regulated to be 5-7, then the aromatic high-performance fiber is put in the ultraviolet-resistant treating agent, and treatment is performed according to the steps and conditions of a conventional high temperature and high pressure dyeing process (shown in the description). By the adoption of the treatment method, the aromatic high-performance fiber can play a lasting ultraviolet-resistant function, can also synchronously achieve corresponding fiber dyeing, the strength retention rate of the fiber subjected to ultraviolet irradiation is effectively improved, an operation process is simple, and the conditions are easy to control. The method is suitable for industrialized production.
Owner:CHENGDU TEXTILE COLLEGE

Method for recycling treatment of rinsing solution during production of bleaching powder concentrate

The invention discloses a method for recycling treatment of a rinsing solution during production of a bleaching powder concentrate. The method comprises the following steps: (1) adding a pickling solution into the rinsing solution at 25-80 DEG C while stirring to ensure that the pH value is equal to 4-5, and stirring uniformly to obtain an orange red sticky substance; (2) adding the pickling solution while stirring to ensure that the orange red sticky substance becomes block liquid; (3) adding the rinsing solution while stirring to ensure that the pH value is equal to 7-7.5 and the black liquid gradually becomes liquid containing orange red particles and generates chlorine, stirring continuously, and collecting chlorine; and (4) filtering the liquid containing the orange red particles to obtain a colorless, clarified and transparent neutral liquid and a red brown filter cake, washing the filter cake, and drying, grinding and firing to obtain iron oxide red. The method disclosed by the invention can be used for treating two types of industrial wastewater, and iron oxide red and chlorine are obtained at the same time, so that the method is green and environment-friendly. The method is short in treatment time, simple to operate, low in energy consumption, and suitable for treatment and production manners under industrial conditions.
Owner:TIANJIN UNIV

Positive electrode material added with Cr element of lithium ion battery and preparation method

The invention discloses a positive electrode material added with a Cr element of a lithium ion battery and a preparation method. The positive electrode material added with the Cr element of the lithium ion battery can be obtained according to the following steps of mixing FeC<2>O<4>.2H<2>O, Li2CO3, NH4H2PO4 and Cr2O according to an atom ratio of Li<1-x>FeCr<x>PO4 (0.01<=x<=0.1), placing the mixture in a ball milling tank, adding an appropriate amount of sucrose and steel balls, carrying out ball milling under the protection of acetone, carrying out vacuum sealing on powder after ball milling, placing the powder in a high temperature environment for calcination and carrying out calcination reaction.
Owner:李梦思

Method for preparing n-tetradecane under normal pressure

The invention relates to a method for preparing n-tetradecane under normal pressure, which comprises the following steps of: (1) mixing glacial acetic acid, zinc powder and alkyl halides of the same grade; (2) dripping hydrochloric acid into the mixture, refluxing, precipitating and separating to obtain a liquid crude product of the n-tetradecane; (3) washing by using acid and alkali to obtain purified liquid of the n-tetradecane; and (4) distilling under reduced pressure to obtain a finished product of the n-tetradecane. The production process is simple, the zinc powder, bromoalkane and the hydrochloric acid are added at the temperature of below 110 DEG C under normal pressure, high-temperature and high-pressure reactions are not performed, and the process has low requirement on production equipment and low danger. In the method, a one-step synthetic mode of reducing the alkyl halides by using hydrogen atoms is adopted, and diethyl ether is replaced by sulfuric acid to remove unsaturated hydrocarbons and alcohols, the safety factor is high, and the condition is easy to control.
Owner:TIANJIN CHEM REAGENT RES INST

Difluoromethylation reaction of paracarbonyl copound participated with [(phenylsulfonyl) difluoromethyl] trimethyl silane

The invention relates to a process for synthesizing difluoro methanol product yield including difluoro methanol from difluoro-methylation reaction of ((phenylsulfonyl) difluoromethyl) trimethyl silicane adding carbonyl compound (aldehyde or ketone), the process consists of fluorinion-initiated (phenylsulfonyl) difluoromethyl methylation reaction and magnesium-participated reduction de-sulfonation reaction, The advantages of the disclosed process include simple process, high yield, economy and reaction environment friendliness.
Owner:SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI

Preparation method of [(phenyl sulfonyl) difluoro methyl] trimethyl silane

The invention provides a process for preparing [(phenylsulfonyl) difluoromethyl] trimethyl silane (TMS-CF2SO2Ph) which comprises, in organic solvent at -78 deg. C to room temperature and at the presence of C1-C4 lithium alkyl or 4-dimethylamino, using difluoromethyl phenyl sulfone or difluoro halogenated methylbenzene sulfone as raw material, and reacting with trimethylchlorosilane. The invention realizes easy operation, and the prepared [(phenylsulfonyl) difluoromethyl] trimethyl silane can catalyze carbonyl compounds for difluoro methylation reaction.
Owner:SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI

A Method for Detecting Photochemical Activity of Carbon Nanotubes Using Transient Absorption Spectroscopy

The invention relates to a method for detecting photochemical activity of a carbon nano tube by utilizing a transient absorption spectrum technology and belongs to the field of photochemical activity detection of carbon nano tubes. The method comprises the following steps: a, preparing aqueous solution of the carbon nano tube, ultrasonically treating the aqueous solution of the carbon nano tube, standing, and taking supernatant liquid of the aqueous solution of the carbon nano tube as a detection object; b, analyzing photochemical properties of the aqueous solution of the carbon nano tube under illumination conditions by utilizing a laser flash photolysis instrument; and c, verifying and analyzing a characteristic peak of the transient absorption spectrum of the carbon nano tube obtained by the laser flash photolysis instrument in step b by utilizing a pulse radiolysis device. According to the detection method, aiming at a special carbon-based nano material such as the carbon nano tube, the photochemical activity particles in the aqueous solution can be conveniently and reliably detected, the carbon nano tube is insensitive to interference of an external environment, and a carbon nano tube sample is not required to be excessively modified and treated in the earlier stage.
Owner:NANJING UNIV

Recycling method of rinsing liquid in the production process of bleaching powder

The invention discloses a method for recycling treatment of a rinsing solution during production of a bleaching powder concentrate. The method comprises the following steps: (1) adding a pickling solution into the rinsing solution at 25-80 DEG C while stirring to ensure that the pH value is equal to 4-5, and stirring uniformly to obtain an orange red sticky substance; (2) adding the pickling solution while stirring to ensure that the orange red sticky substance becomes block liquid; (3) adding the rinsing solution while stirring to ensure that the pH value is equal to 7-7.5 and the black liquid gradually becomes liquid containing orange red particles and generates chlorine, stirring continuously, and collecting chlorine; and (4) filtering the liquid containing the orange red particles to obtain a colorless, clarified and transparent neutral liquid and a red brown filter cake, washing the filter cake, and drying, grinding and firing to obtain iron oxide red. The method disclosed by the invention can be used for treating two types of industrial wastewater, and iron oxide red and chlorine are obtained at the same time, so that the method is green and environment-friendly. The method is short in treatment time, simple to operate, low in energy consumption, and suitable for treatment and production manners under industrial conditions.
Owner:TIANJIN UNIV

Sm-element-added lithium ion electrode material

The invention discloses a Sm-element-added lithium ion electrode material. Firstly, a proper amount of FeC2O4-2H2O powder, Li2CO3 powder, NH4H2PO4 powder, Cr2O3 powder and metal Sm powder are weighedaccording to Li1-xFe0.9Cr0.1SmxPO4, wherein x is larger than or equal to 0.01 and smaller than or equal to 0.1; the materials are cleaned with an acetone solution, and then the mixture is put into a ball milling tank; a proper amount of cane sugar is added into the ball milling tank, then steel balls with a certain ball-to-ball ratio are put into the ball milling tank, and a tank body is immersedby acetone; then the mixture is put into a ball mill to carry out ball milling, alloy micro powder is taken out after ball milling and is aired, then the powder is put into a quartz glass tube, and vacuum sealing is carried out; the mixture is put into a high-temperature furnace to be calcined under the condition that the air tightness is good, and the powder is taken out after being calcined andis collected to obtain the product.
Owner:郑春燕

Preparation process of novel composite electrode material

The invention discloses a preparation process of a novel composite electrode material. The process comprises that the lithium iron phosphate composite electrode material is prepared from FeC2O4.2H2O,Li2CO3, NH4H2PO4, a metal Mn powder and a rare earth Pr powder as raw materials. The process comprises the steps: firstly, proportioning according to the atomic ratio of Li1-xLaxFe1-yMnyPO4, initiallymixing, and putting the mixture into a ball milling tank, and ball-milling under the condition of argon protection; and after ball milling, carrying out segmented high temperature sintering, coolingand collecting a powder, and thus obtaining the product. The preparation process has the advantages of simple preparation process, short technological process, good performance of the prepared electrode material and the like.
Owner:郑春燕

Composite lithium ion electrode material

The invention discloses a composite lithium ion electrode material. A preparation method of the electrode material comprises the steps: taking FeC2O4.2H2O, Li2CO3, NH4H2PO4, a Mn powder and a Ce powder as raw materials, preparing the raw materials according to the atomic ratio of Li1-xCexFe1-yMnyPO4 and mixing, then carrying out ball milling, keeping the temperature of the mixture after ball milling constant for 5 hours or more in the environment with the temperature of 300 DEG C, keeping the temperature constant for 10 hours or more in the environment with the temperature of 600 DEG C, allowing the mixture to undergo a reaction and sintering at high temperature, naturally cooling, collecting a powder, and thus obtaining the product.
Owner:郑春燕

Electrode material

The invention discloses an electrode material. The electrode material is prepared according to the following steps: first, taking appropriate amounts of chemically pure FeC2O4.2H2O, Li2CO3, NH4H2PO4,metal Mn powder, and metal La powder as raw materials according to the atom ratio of Li<1-x>La<x>Fe<1-y>Mn<y>PO<4> (0.01<=x<=0.1, 0.1<=y<=0.3) for proportioning, performing primary mixing on the proportioned raw materials, performing ball milling, under the protection of nitrogen, heating ball milled mixture to a temperature of 300 DEG C, and keeping the constant temperature for 5 hours or more, then raising the temperature to 600 DEG C, keeping the constant temperature for 10 hours or more, after the reaction is completed, performing cooling along with a furnace, and collecting a powder to obtain the product.
Owner:郑春燕

Process for preparing anode material for compound lithium ion batteries through WO3

The invention discloses a process for preparing an anode material for compound lithium ion batteries through WO3. According to the process, FeC2O4.2H2O, Li2CO3, NH4H2PO4 and WO3 are used as raw materials and mixed according to a certain proportion, a ball-milling tank is filled with the mixture, an appropriate amount of sucrose and an appropriate number of steel balls are placed in the tank, ball milling is conducted under dispersion of acetone, powder obtained after ball milling is sealed in a vacuum mode and placed at a high temperature to be sintered, and the anode material can be obtained after the sintering reaction.
Owner:李梦思
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