110results about How to "Method green" patented technology

The present invention discloses a method using 1,4-dihydroxy-9,10-anthraquinone thiosemicarbazone compound as a fluorescent probe to detect copper ions, and belongs to the technical field of optical analysis detection. The recognition effect of the 1,4-dihydroxy-9,10-anthraquinone thiosemicarbazone compound and various metal ions is investigated and studied experimentally, a good copper ion selective recognition effect of probe molecule ESN is found, due to the solubility of hydroxyl and water, the probe molecule can achieve the fluorescence identification of the copper ions in an aqueous solution, a better result can be achieved under physiological pH condition, the method is green, specific in copper ion selectivity and relatively high in sensitivity, and can play fluorescence quenching role in short reaction time, and the probe molecule can be successfully applied to the detection of the copper ions in biological living cells.

The invention belongs to the field of analysis of harmful ingredients of an electronic cigarette and particularly relates to a method for measuring eight carbonyl compounds in electronic cigarette tobacco tar. The method is characterized in that a DNPH (dinitrophenylhydrazine) solution prepared from diluted hydrochloric acid and the carbonyl compounds in the electronic cigarette tobacco tar have a derivatization reaction, pH (potential of hydrogen) of the reaction solution is adjusted with Tris (trihydroxymethyl aminomethane) base, stability of a reaction product is kept, and the eight carbonyl compounds in the electronic cigarette tobacco tar are analyzed and measured with HPLC (high performance liquid chromatography). The method has the advantages as follows: the sample pretreatment process is simple and rapid; a DNPH derivatization reagent and the Tris base are prepared with deionized water, no organic reagent is used in the pretreatment process, and the method is green and environment-friendly. The method is accurate in measurement, high in sensitivity and good in repeatability and can provide a technical support for product quality control of the electronic cigarette tobacco tar.

The invention provides a method for preparing SrCuSi4O10 and BaCuSi4O10 blue pigments through a hydrothermal technique, and belongs to the technical field of hydrothermal chemistry. The method uses copper oxide powder or copper salt, barium salt or strontium salt, and silicate as raw materials, and NH4OH as a mineralizing agent and comprises the following hydrothermal reaction processes: mixing a reactant with distilled water according to a stoichiometric ratio of an objective product, adjusting the pH value of a solution to be greater than 10 and less than 14, putting in a high-pressure reactor so as to enable the filling degree to reach 40%-90%, sealing and reacting for 5-72 hours at the temperature of 230-300 DEG C; and cooling and filtering so as to obtain products. The invention provides a new reaction route and a green preparation method for SrCuSi4O10 and BaCuSi4O10 difficult to prepare. The products are multi-level structure microparticles, have high purity, regular morphology and good dispersity and are uniform in particle size. The preparation method is simple, efficient and high in yield; waste liquid generated in a hydrothermal reaction process can be recycled.

The invention relates to a preparation method of biobased water-borne UV (ultraviolet) curing environment-friendly nail polish. The preparation method is characterized by comprising the following steps of weighing 30 to 50% of biobased water-borne UV curing environment-friendly nail polish resin, 5 to 10% of deionized water, 40 to 60% of pigment, 0.1 to 0.5% of wetting dispersant, 0.1 to 0.5% of flatting agent, 0.2 to 0.5% of defoaming agent, and 1.0 to 2.0% of thickener; adding the pigment, the wetting dispersant, the flatting agent, the defoaming agent and the deionized water into a ball mill to mill, so as to obtain a color paste a; adding the biobased water-borne UV curing environment-friendly nail polish resin into the color paste a, stirring at high speed, adding the thickener, and filtering by a 200-mesh filter net, so as to obtain the biobased water-borne UV curing environment-friendly nail polish. The prepared biobased water-borne UV curing environment-friendly nail polish has the characteristics that the curing speed is quick, the transparency is good, the storage stability and luster are high, the adhesion force is good, and the like. The preparation method has the advantages that the green, environment-friendly, non-toxic and non-odor effects are realized, and the product cost is reduced.

The present invention is a preparation and characterization method of a graphene/gold nanoparticle composite material. The specific steps are: (1) preparation of graphene oxide: including multiple steps of low-temperature reaction, medium-temperature reaction, high-temperature reaction and post-treatment; (2) ) preparation of graphene oxide dispersion system; (3) preparation of graphene/gold nanoparticle composite electrodeposition precursor; (4) preparation of graphene/gold nanoparticle composite material: including electrode pretreatment and electrodeposition preparation; ( 5) Characterization of graphene/gold nanoparticle composites: including scanning electron microscopy and transmission electron microscopy. The method for preparing the graphene/gold nanoparticle composite material in the invention is simple and green, and by adjusting the form and concentration of the metal precursor, the morphology control of the graphene-based composite film can be realized. The controllability of the structure of this method provides a new idea for material design and controlled synthesis for the application of graphene-based materials, especially in electrochemistry.

The invention discloses a composite fermented microbial soil conditioner and a preparation method thereof. The composite fermented microbial soil conditioner comprises 10-20 ml of actinomycetes fermentation liquor, 10-30 ml of saccharomycetes fermentation liquor, 10-40 ml of lactobacillus fermentation liquor, 10-50 ml of bacillus fermentation liquor, 10-20 ml of photosynthetic bacteria fermentation liquor, 5-15 g of actinomycetes powder, 3-8 g of saccharomycetes powder, 5-15 g of lactobacillus powder, 10-30 g of bacillus powder, 3-8 g of photosynthetic bacteria powder and 50-100 kg of an organic material of which C: N= 20-25: 1. The invention provides the composite microbial agent which promotes fertility absorption in soil, improves physical and chemical properties of soil, improves soilcaking caused by a large amount of fertilization for a long time, increases the content of beneficial bacteria of the soil, increases the content of organic matters of the soil, promotes growth of root systems of plants, inhibits soil-borne diseases and improves disease resistance of crops and a preparation method of the composite microbial agent. The method is environmentally friendly, pollution-free, low-carbon, efficient, short in period, low in cost and simple to operate.

The invention relates to the technical field of energy and materials, in particular to a method and device for recycling metal from a waste lithium battery. The method comprises the following steps that the electrode material of the waste lithium battery is used as a cathode, and a noble electrode is used as an anode; and the cathode and the anode are placed in an electrolyte to carry out an electrochemical reaction, a mixed solution containing recycling metal ions is obtained, and the recycling metal ions comprise at least one kind of nickel ions, cobalt ions and manganese ions. The electrochemical reaction is utilized, and lithium, nickel, cobalt, manganese and other metal with high utilization value can be effectively recycled from a waste lithium battery electrode material.

Rebaudioside-KA is a nature-derived novel tetranuclear diterpenoids sweetener compound with low calorific value and high sweetness, has very low content in Stevia rebaudiana, and is difficult to obtain in in a large quantity and in a low cost and green manner. The invention establishes a green biosynthetic method for rebaudioside-KA from rubusoside, which can be easily obtained in a large quantity, as a substrate by fixed-site glycosylation by using glycosyltransferase OleD and a homologous protein thereof. The invention realizes green biological preparation of high-purity rebaudioside-KA through optimizing reaction conditions. The sweetness of rebaudioside-KA is equivalent to the sweetness of rubusoside (over 300 times o sucrose sweetness), and the rebaudioside-KA has pure taste and no bitter after-taste, so that the rebaudioside-KA is more suitable for being used as a sweetener or a correctant in food, beverage, medicament, alcohols, nutritional health products, condiment, chemical necessities, oral hygiene products, cosmetics and other products and fields.

The invention discloses a preparation method of a carbon-silicon solid acid catalyst and application in extraction of organic acid in fermentation broth. The method comprises the following steps: swelling: heating and co-hydrolyzing soluble starch with high content of straight chain molecules and silicate ester for 2 h, aging at room temperature for 1-2 days, exchanging moisture in the system with an organic solvent with lower surface tension than water, and drying; carbonization activation: carrying out one-step carbonization activation by using soluble inorganic salt or strong base under nitrogen protection; and sulfonation: carrying out sulfonation on a carbon-silicon composite material by the use of concentrated sulfuric acid, so as to obtain the carbon-silicon solid acid catalyst. The catalyst is used for extraction of low-concentration organic acid in various fermentation broths. The invention has the following advantages: the synthetic method is green, raw materials are easily available, and discharge of spend liquor and exhaust gas is less; dispersity in an aqueous solution is high; hydrophilicity is strong, and acid value is high; the synthesized material has large specific surface area; synthesis cost is low; catalytic effect is good; and the catalyst can be repeatedly used for many times.

The invention discloses a preparation method and application of an ionic liquid/MOF composite catalyst. The catalyst is prepared by taking diamino-functionalized ionic liquid and dialdehyde as raw materials and taking a metal organic framework material as a carrier. The preparation method for such a material is simple in process and low in ionic liquid consumption; and the prepared catalyst has excellent catalytic performance, can efficiently catalyze and convert CO2 to prepare cyclic carbonate under mild conditions of normal pressure, low temperature, no cocatalyst and the like, presents excellent cycling stability, and is of great significance to CO2 emission reduction and resource utilization.

The invention discloses a method for reducing electrostatic level in a fluidized bed reactor. The method comprises the following steps: receiving an electrostatic signal inside the fluidized bed reactor, analyzing the received electrostatic signal, selecting characteristic parameters of the electrostatic signal and determining the electrostatic potential level in a fluidized bed, adjusting the superficial gas velocity of different areas, and achieving the reduction of the electrostatic level in the fluidized bed reactor. The method can effectively reduce the electrostatic level in the fluidized bed reactor, so as to ensure continuously stable production operation, has the characteristics of environmental protection, safety, simpleness and easiness and fastness and the like, can reduce thestatic electricity in the fluidized bed reactor to a great extent and control the production parameters according to detection results.

The invention belongs to the field of low-dimensional nanomaterials and particularly relates to a preparation method of a vertical cross SiO2 nanorod. The preparation method comprises the following steps: putting SiO powder in a high-temperature area of a furnace center by using a thermal evaporation method without a metal catalyst; collecting a substrate, and also putting the substrate in the high-temperature area; filling a furnace chamber with argon, raising the temperature of a central area of a tube furnace to 1050 to 1150DEG C, and insulating for 3 to 4hrs; after the insulation time is reached, growing the vertical cross SiO2 nanorod on the growth substrate. The preparation method disclosed by the invention has the advantages of environment friendliness, safety, simple method, quick response, no pollution, low cost, high purity of a sample and the like. The prepared vertical cross SiO2 nanorod has great application potential in the fields of medicine, filtering, catalysis, light absorption, novel materials and the like.

The invention discloses a preparation method of zein-gallic acid composite colloidal particles and emulsion thereof. The method comprises the following steps of preparing a 2% zein ethanol solution, and performing storage in a refrigerator overnight; adding gallic acid according to a proportional relation under a rotary stirring condition, and performing continuous stirring until the gallic acid is completely dissolved; pouring a mixture solution into distilled water, and performing stirring and rotary evaporation to remove ethanol; treating the mixed solution free of the ethanol is removed to obtain the composite colloidal particles; and mixing the mixed solution free of the ethanol with corn oil with the same volume as the mixed solution free of the ethanol, and performing homogenizing at a high speed to obtain the stable oil-in-water emulsion of the zein-gallic acid composite colloidal particles.

The invention relates to a method for preparing acetic acid by one-step conversion of CH4 and CO2 through cooperation of low-temperature plasma and a modified molecular sieve catalyst, and belongs tothe field of CH4 and CO2 conversion and utilization. The preparation method comprises the following steps: (1) modifying a molecular sieve by at least one of a water vapor passivation method, an acidtreatment method, an alkali treatment method, an alkali metal modification method, an alkaline earth metal modification method and a rare earth metal modification method; and (2) roasting the productobtained in the step (1) in a plasma atmosphere at 350-500 DEG C for 0.5-3 hours. According to the method, CH4 and CO2 are converted into acetic acid with high additional value by using a one-step method under the conditions of low temperature and normal pressure, the process is simple, the method is green, the atom economy is high, the problem that the conventional catalytic CH4 and CO2 reactionneeds high temperature (generally higher than 700 DEG C) is solved, and meanwhile, the additional value of the product converted from CH4 and CO2 is increased.

The invention relates to a biological fermentation process of neohesperidin dihydrochalcone. The biological fermentation process comprises the following steps: by adopting neohesperidin as a startingraw material, carrying out biological-process hydrogenation reduction by utilizing a reduced coenzyme NADH to obtain the neohesperidin dihydrochalcone. The biological fermentation process of the neohesperidin dihydrochalcone has the beneficial effects that the process is simple, the operation is convenient, the production efficiency is high, and the product quality is good; the biological fermentation process is green, safe, healthy and reliable.