183results about How to "Good dosage" patented technology

The invention provides a preparation method of an emulsified asphalt cold recycling asphalt mixture. The preparation method relates to the field of road engineering and includes the following steps: obtaining milling samples of old asphalt pavement, determining grading of filler, determining weight percentage of rough milling materials, fine milling materials, cement and mineral powder in raw materials, determining optimum moisture content a, determining optimum dosage of emulsified asphalt, determining optimum moisture content b, conducting checking and stirring the emulsified asphalt cold recycling asphalt mixture. The preparation method is rigor. Determination of optimum usage and optimum moisture content of emulsified asphalt gives consideration to the lubrication effect of water and asphalt in the molding process. The optimum moisture content and the optimum dosage of the emulsified asphalt are determined through checking. The preparation method adopts the processes of rotating, compacting, once molding and nourishment, accords with reality, and is reasonable and capable of meeting requirements for actual engineering.

The invention discloses an acidolysis method of magnesium-containing phosphate rock. The method provided by the invention is characterized by comprising the following steps of: carrying out acidolysis on the magnesium-containing phosphate rock to obtain a water-soluble calcium, magnesium and phosphoric acid containing acidolysis solution, carrying out acidolysis on the phosphate rock by using the generated phosphoric acid to generate Ca(H2PO4)2.H2O solid, performing a reaction between H2SO4 and water-soluble calcium to generate high-pureness calcium sulfate whisker, and performing a reaction between water-soluble magnesium and phosphor in the acidolysis solution and NH3 to generate character separation magnesium ions of a MgNH4PO4 solid so as to realize complete high-efficiency comprehensive utilization of the acidolyzed magnesium-containing phosphate rock. The focus of the invention is to change magnesium ions into controllable parameters which are beneficial to circulation of the acidolysis solution. The magnesium-containing phosphate rock can be efficiently utilized, and also the compound magnesium ammonium phosphate can be used to realize the separation of phosphor magnesium from a circulation medium HCl or HNO3 or CaCL, Ca(NO3)2, thus realizing the combination and combined production with a present ammonium phosphate and phosphor product processing technology. The method provided by the invention has advantages of concise technology, less investment, low energy consumption, low cost, high benefit and no discharge of ''three wastes (waste gas, wastewater and industrial residue)'', and fully presents great business value and great resource value of the high magnesium-containing phosphate rock.

The invention discloses a lightweight flame retardant and foamy filling material of cement doors and manufacturing method thereof, comprising magnesium oxide, magnesium sulphate, fly ash, high alumina refractory cement, calcium chloride, water proofing agent, water reducing agent and foaming agent, with bulk density ranging between 200 kg/m³ and 500kg/m³; the ingredients are formulated by weight at a rate of: magnesium oxide (40 percent -55 percent), magnesium sulfate (15 percent-40 percent), fly ash (5 percent-20 percent), high alumina refractory cement (5 percent-20 percent), calcium chloride (2 percent-6 percent), water proofing agent (2 percent5 percent), water reducing agent (0.2 percent1.5 percent) and foaming agent (0.1 percent-0.5 percent). With the technical solution, the product has the advantages of high strength, light weight, flame retardancy, sound insulation, weather resistance, thermal resistance, energy efficient, freedom from toxicity, harm and irradiation, low manufacturing cost, simple process, etc, which can be widely employed for fire/theft proof metal interior door, building material and like sectors.

The invention discloses a method for controlling automatic flocculant addition, which belongs to the field of sewage treatment. A feedback control system determines the flow of sewage and the concentration of TP and SS after sewage treatment and feeds back determination results to a PLC control system; and the PLC control system performs calculation by using undetermined parameters through a formula as follows: delta X dosage=k*Q*L*(P-1.1A)a*(S-1.05B)b/(lambda*N)according to the feedback of the feedback control system of the flow, the TP and the SS to indirectly determine the dosage of flocculant. The invention can regulate the dosage of the flocculant in time according to the coagulation effect of the sewage treatment and ensure the optimal dosage of the flocculant and the effect of the sewage treatment.

The invention relates to an isoborneol-dehydrogenated camphor refining method. The method sequentially comprises a dehydrogenation reaction and solvent recovery step, a camphor vaporization subliming step and a camphor sublimation collecting step, wherein the dehydrogenation reaction and solvent recovery step comprises the steps of feeding a mixed solution of the isoborneol and an isoborneol dissolving solvent and a dehydrogenation catalyst into a reactor, heating the reactor so as to realize dehydrogenation reaction, exhausting hydrogen gas produced from the dehydrogenation reaction by using a fractionating column, and recovering the isoborneol dissolving solvent. According to the method, the disadvantage in the existing isoborneol-dehydrogenated camphor refining process that the steps of dehydrogenation reaction, solvent recovery and vaporization subliming are required to be carried out sequentially in different devices is overcome, the integration of a dehydrogenation reactor, a solvent recovery device and a sublimation device can be realized, and thus the steps of dehydrogenation reaction, solvent recovery and vaporization subliming can be carried out in the same reactor; and the method has the advantages of reducing working procedures and greatly reducing manpower and equipment costs.

The invention discloses hydrating and whitening eye cream. The hydrating and whitening eye cream is characterized by comprising the following constituents in parts by weight: 3 to 5 parts of pearl, 2 to 4 parts of borax, 0.3 to 0.5 part of ketone musk, 2 to 3 parts of oil phase, 0.2 to 0.4 part of zinc carbonate hydroxide, 1 to 2 parts of an alcohol mixture, 0.05 to 0.08 part of glycerol monostearate, 0.06 to 0.08 part of hydroxybenzoic acid propyl este, 5 to 7 parts of glycerin, 0.8 to 1 part of polyacrylamide, 0.1 to 0.3 part of ethylenediaminetetraacetic acid disodium salt, 0.2 to 0.5 part of methylparaben, 0.2 to 0.4 part of soybean peptide, 1 to 2 parts of oxido reductase, 1 to 2 parts of hydrolyzed rice bran protein, 0.6 to 0.8 part of polydimethylsiloxane, 0.05 to 0.08 part of propyl hydroxybenzoate, 1 to 2 parts of citric acid, 0.2 to 0.5 part of preservative imidazolidinyl urea, 0.3 to 0.5 part of essence, and 100 parts of deionized water. The eye cream is not oleaginous, easy to apply and comfortable to use, enhances the cell activity performance of eyes, has the advantages of low use level and fastness in becoming effective, can obviously improve the appearance indexes, such as gloss, brightness, viscosity and the like, of the eye cream, does not has side effects, and does not have stimulation and untoward effects on normal human skin.

The invention discloses a compound preservative of meat products, aiming at providing a high-efficiency compound preservative which is used in the pickling process of the meat product and various pickled-type meat products, can effectively substitute the bacterial inhibition capability of nitrite, reduces the harm of the nitrite and properly prolongs the shelf life of the meat products. The preservative is prepared from 0.001 to 0.005% of sorbic acid food additive, 1 to 5% of sodium lactate, 0.01 to 0.1% of nisin and 0.01 to 0.05% of EDTA or sodium salt of the EDTA according to the weight percent of meat raw materials. The preservative has simple operation and convenient use, is safe and reliable and can obviously reduce the residual quantity of the nitrite, the preservative effect is superior to that of the nitrite, and the shelf life of the pickled-type meat products can be obviously prolonged.

The invention relates to a preparation method of a chitosan-hydrotalcite nanocomposite material. The preparation method comprises the following steps: step one, adding 0.5g of chitosan into 70 mL of a2% acetic acid solution, carrying out ultrasonic dissolution to obtain a yellowish transparent solution, and adding 0.5-2.5 g of magnesium aluminum hydrotalcite into 50 mL of a 2% acetic acid solution for dissolution; step two, putting the two dissolving solutions into a three-necked flask at a same time, carrying out a reaction by stirring for 1 hour, adding 5 mL of formaldehyde, carrying out heating to 60 DEG C, carrying out a reaction for 1 hour, adjusting the pH value to be about 9.0 by using a NaOH solution with a concentration of 1 mol/L, adding 10 mL of epichlorohydrin, keeping the pHvalue to be about 9.0 at any time by adjusting, and carrying out a reaction for 2.5 hours; and step three, carrying out washing with absolute ethyl alcohol to neutrality, finally carrying out drying at a temperature of 60 DEG C, and carrying out grinding and sieving to obtain the white solid chitosan/magnesium aluminum hydrotalcite.

The invention provides a construction method for in-situ cold recycling of foamed asphalt. The method includes: S1) designing gradation of a synthetic mixture; S2) selecting mineral materials with optimal gradation; S3) selecting the optimal water content; S4) selecting the optimal addition amount of foamed asphalt; S5) preparing a test piece by utilizing the mineral materials with optimal gradation in the optimal water content and the optimal addition amount of foamed asphalt by rotary compaction, verifying whether the dry-wet split intensity ratio and the freeze-thaw split intensity ratio ofthe test piece meet requirements in Technical Specifications for Highway Asphalt Pavement Recycling, and if yes, determining that a ratio determined by the abovementioned steps is a preferred ratio,otherwise, returning to the step S1) to redesign gradation of the synthetic mixture; S6) performing in-situ cold recycling construction according to the preferred ratio; and S7) curing. The ratio design method overcomes limitations of the current specifications. The improvement of the process in the step S6) overcomes the disadvantages of the difficulty of aggregate adding and aggregate dusting, improves the uniformity of aggregate mixing, and is more conducive to green and civilized construction.

The invention discloses a direct coal liquefaction residue-modified asphalt mixture, which is prepared from the following raw materials in percentage by weight: 91 to 95 percent of aggregate, 1.5 to 4 percent of mineral powder and 3 to 5 percent of direct coal liquefaction residue-modified asphalt. The invention also discloses a preparation method of the direct coal liquefaction residue-modified asphalt mixture, and the steps of preparation are as follows in sequence: preparing direct coal liquefaction residue-modified asphalt; pre-processing the direct coal liquefaction residue-modified asphalt, the aggregate and the mineral powder; blending direct coal liquefaction residue-modified asphalt of different amounts with the aggregate, and adding mineral powder for blending, so as to prepare a direct coal liquefaction residue-modified asphalt mixture; determining the optimal amount of the direct coal liquefaction residue-modified asphalt through comprehensive evaluation; blending the direct coal liquefaction residue-modified asphalt of the optimal amount with the aggregate, and adding the mineral powder for blending, so as to prepare the direct coal liquefaction residue-modified asphalt mixture. By adopting the technical scheme provided by the invention, direct coal liquefaction residue can be changed from waste into wealth, and obvious economic benefit and social benefit are achieved.

The invention discloses a hydrogen fluoride-containing mixed gas absorption experimental device. The hydrogen fluoride-containing mixed gas absorption experimental device comprises an air source, a hydrogen fluoride gas source, a mixer and a gas absorption system, wherein the air source and the hydrogen fluoride gas source are connected to the mixer through pipelines, the mixer is connected with the gas absorption system through a pipeline and used for proportionally mixing air coming from the air source and hydrogen fluoride gas coming from the hydrogen fluoride gas source, the mixed gas is absorbed by a calcium sulfate solution or a sodium hydroxide solution inside the gas absorption system by spraying after entering the gas absorption system, an induced draft fan connected with an external environment is used for emptying the gas absorption system, and the gas absorption system is a primary absorption tower and/or a secondary absorption tower connected with the primary absorption tower in series. The hydrogen fluoride-containing mixed gas absorption experimental device disclosed by the invention can be used for absorbing the hydrogen fluoride mixed gas in different content ranges so as to provide a theory basis for future industrial hydrogen fluoride gas absorption devices.

The invention discloses a compound freshness retaining method for pomes. The compound freshness retaining method is characterized by comprising the following steps of: determining the optimal irradiation dose according to the conductivity, and determining the optimal chitosan using amount according to the optimal irradiation dose. After freshness retaining liquid is prepared and is used for soaking film coating treatment; then irradiation is performed according to the optimal chitosan using amount, so that germs are killed, and physiological activities such as breathing of fruits and water loss are suppressed; and therefore, the aim of obviously improving the freshness retaining effect compared with that of the single chitosan film coating is fulfilled. By the method, the pome freshness retaining effect is obviously enhanced, and the chitosan using amount is reduced; the irradiation cost is lowered; and the environment is not polluted.

The invention discloses a composite coating. The composite coating comprises the following components in parts by weight: 40-50 parts of fluorocarbon resin, 0.5-2 parts of graphene, 0.5-1 part of polyamide rheological agent, 5-15 parts of modified phosphate, 0.5-2 parts of dispersing agent, 0.5-2 parts of coupling agent, 5-10 parts of modified resin and 10-20 parts of solvent. The following two technical problems are mainly solved: I. the functions of the primer and the top coat are unified and the aim of convenience in construction is achieved; and II. graphene is used as a functional filler to achieve the function of high barrier, so corrosive media are difficult to permeate substrates, thus improving the salt spray, chemicals, weather and damp heat resistance of the coating.

The present invention provides a Chinese medicine Qidan Tongmai tablet for effectively curing the diseases of coronary heart disease and angina pectoris, etc. It is made up by using 5 Chinese medicinal materials of astragalus root, salvia root and others through a certain preparation process. Said invention also provides the concrete steps of said preparation method.