37results about How to "Not easy to crystallize out" patented technology

The invention discloses aprocess of two-stage condensing phosphoric acid with wet method. It comprises condensing phosphoric acid, clarifying, adsorbing with fluorine and water circulation system; and it employs a two-stage condensing course in series: adding diluted phosphoric acid into the first stage condensing closed circuit, heating with steam, steaming out of water in a short time invacuum condition to condense phosphoric acid into mediate acid, clarifying to remove part of suspending soild and getting clean acid A; putting acid A to the second condensing system to be condensed into diluted phosphoric acid, clarifying and getting clean acid B, that is the finished product. The left acid by clarifying in the two stages is used for preparing compound fertilizer or is recoveried after press filtration; the SiF4 and HF in steam is adsorbed through two-stage adverse current and is prepared into side product of fluosilicic acid. The invention smploys a two-stage condensing process, which improvese heat and mass transferring process, saves investment at the same production capability; reduces phosphoric acid circulation amount and circulating water consumption; reduces phosphoric acid viscosity and improves concentration and quality of finished product.

The invention discloses a composite anti-salt agent, which mainly comprises a ferrocyanide solubilizer A and a complexone B, and can further comprise a polymer lattice modifier C and/or water. According to the present invention, the composite anti-salt agent has a synergistic effect, wherein the ferrocyanide solubilizer A in the composite anti-salt agent can substantially increase the solubility of the salt, and provides the main effect of the composite anti-salt agent, the complexone B in the composite anti-salt agent has good complexation effects on metal ions and can change the metal ion concentration of the salt crystal so as to reduce the solubility product of the salt crystal, and the polymer lattice modifier C can change the compact structure of the salt into the loose structure soas to make the salt be easily carried away by the flowing of the solution. According to the present invention, the composite anti-salt agent can provide excellent salt crystallization prevention effect on salt solutions with highly mineralized sodium chloride, and further can provide good salt release effects on salt solutions with highly mineralized sodium chloride, calcium chloride and magnesiumchloride.

The invention discloses a novel nitrofurazone washing fluid, which mainly comprises an active component nitrofurazone, a solubilizing agent polyethyleneglycol 15-hydroxyl stearate and a solvent injection water. Furthermore, one or more of cosolvent, pH regulator, osmotic pressure regulator and stabilizing agent can be added into the washing fluid. In the washing fluid, a novel solubilizer Solutol HS 15 has low haemolysis, extremely low histamine liberation and higher physiological tolerance, so that safety of clinical administration and compliance of patients are remarkably improved; the washing fluid has excellent stability and longer validity, and higher administration convenience is given to clinical doctors; and the washing fluid has better storage and transportation stability, higher clinical administration safety and patient compliance. The washing fluid has a simple preparation process, convenience in quality control, lower production cost and industrial production.

The invention relates to a downhole three-phase separating device which comprises a two-stage bubble-breaking gas-liquid separating mechanism and cyclone sand settling three-phase separating mechanism. Bubble breaking separation is organically combined with gravity cyclone sand settling three-phase separation, multi-phase flow output liquid is subjected to gas-liquid separation through the bubble-breaking gas-liquid separating mechanism and then subjected to solid-gas-liquid separation through the cyclone sand settling separating mechanism, during the process, heavy solid phase is thrown to the periphery under centrifugal force and gravity and settled to the bottom under gravity, light liquid enters a central pipe, the lightest gas is emitted upwards along gas guide holes to a gas collecting cavity, and three-phase multi-stage separation is achieved. By the downhole three-phase separating device suitable for output liquid with wider vapor liquid ratio range, mud and sand discharge of oil wells can be dealt with effectively, and for oil wells with sufficient stratum liquid supply capacity, pumping effect can be increased, oil well yield can be increased, pump detection cycle can be prolonged, and production effectiveness can be increased.

The invention belongs to the field of cosmetics, and particularly relates to an oil-in-water sunscreen lotion and a preparation method thereof. The oil-in-water sunscreen lotion is prepared from the following components in parts by weight: 45-60 parts of a group A water phase component, 35-45 parts of a group B oil phase component, 0.5-0.8 part of a group C component, 0.5-1.5 parts of a group D component and 15-20 parts of a group E component; the group B oil phase component is selected from one or more of an organic sunscreen agent, grease, a skin feeling regulator, an emulsifier and an antioxidant; and the emulsifier comprises an O/W type emulsifier with the pH value of 5.5-7.5 and an O/W non-ionic emulsifier with the HLB value of 10-13, and the aqueous solution of the O/W type emulsifier is 5wt%. The oil-in-water sunscreen lotion has the advantages of strong sunscreen capability, no irritation to human bodies, excellent compatibility with silicone oil substances, difficulty in crystallization and precipitation, easiness in film formation, safety in use, good touch and refreshing skin feeling.

A novel bacteriostatic agent without corrosion-preventing concept comprises the following components in percentage by mass: 10 to 20 percent of p-hydroxyacetophenone, 20 to 40 percent of pentanediol, 30 to 50 percent of hexanediol, 5 to 15 percent of anisic acid and 5 to 15 percent of leuconostoc/radish root fermentation product filtrate. The bacteriostatic agent is convenient to add, high in compatibility, high in water solubility and insusceptible to separation by crystallization at a low temperature, and has little influence on the system; the smell is extremely low, the transparency is high, the product is insusceptible to color change, and the use experience of users is improved; the bacteriostatic agent does not contain preservative, has a good bacteriostatic effect, effectively reduce irradiation and influence on skin by cosmetics, has low probability of causing skin discomfort, is mild and non-irritant, and is suitable for all kinds of people.

The invention provides a method for preparing telluric acid, which comprises the following steps: mixing tellurium powder and hydrogen peroxide in water to carry out redox reaction, thereby obtaining a telluric acid solution, wherein the purity of the tellurium powder is greater than 99.9%, and the particle size of the tellurium powder is smaller than 325 micrometers; and concentrating the telluric acid solution to crystallize, thereby obtaining the telluric acid. The raw material tellurium powder with the purity of greater than 99.9% and the particle size of smaller than 325 micrometers and hydrogen peroxide are subjected to redox reaction in water to obtain the telluric acid. By using the tellurium powder with the purity of greater than 99.9% and the particle size of smaller than 325 micrometers as the raw material without introducing new impurities, the prepared telluric acid has higher purity and higher product yield. The experimental result indicates that the telluric acid obtained by the method is Grade 5N, the total impurity content is lower than 10 ppm, and the product yield can reach 77.23%.

The invention discloses a prescription of a compound berberine sulfate injection for veterinary use and a preparation process thereof, belonging to veterinary drug technologies. The prescription consists of a main drug, an effect extending agent, a cosolvent, an antioxidant and water, and a high-concentration injection can be prepared. The injection is advanced in process, high in stability, long-acting, broad in spectrum, high-efficiency, small in irritation to the injection part and convenient to use, and the curative effect of the injection is obviously superior to that of single preparations of a berberine sulfate injection and an enrofloxacin injection. The injection comprises the following raw materials: 0.5-5.0 percent of berberine sulfate, 2.5-20.0 percent of enrofloxacin, 1-10 percent of effect extending agent, 1-10 percent of cosolvent, and 0.1-0.5 percent of antioxidant, wherein the effect extending agent refers to one or a mixture of several in polyethylene glycol, polyvinyl alcohol, povidone, hydroxyethyl cellulose, hydroxy propyl cellulose, carboxymethyl cellulose, hyaluronic acid, xanthan gum, gelatin, chitosan and alginate, the cosolvent refers to one or a mixture of several in sulfuric acid, hydrochloric acid, lactic acid, citric acid and acetic acid, and the antioxidant refers to one or a mixture of several in sodium hydrogen sulfite, anhydrous sodium sulfite, sodium formaldehyde sulfoxylate, sodium pyrosulfite, thiourea, L-cysteamine hydrochloride, vitamin C and ethidene diamine.

The invention discloses a bisazo purple dye and its application. An oxyalkyl chain R2 is introduced into the structure of the bisazo purple dye, thus greatly raising affinity between the bisazo purple dye and a nonpolar solvent. The bisazo purple dye has high solubility in a nonpolar solvent, and interactive force between dye materials is inhibited due to introduction of the long carbon chain. Therefore, the bisazo purple dye is not easy to separate out by crystallization in a nonpolar solvent. By dissolving the dye in a nonpolar solvent, purple printing ink can be obtained, and there is no separation by crystallization after long-term standing of the printing ink at low temperature. The bisazo purple dye can be effectively applied in electrowetting display devices.

The invention relates to the technical field of oil field oil extraction, and particularly relates to a quantum wax scale treatment integrated device special for an oil field. The quantum wax scale treatment integrated device comprises a jet flow vibration assembly, a quantum cavitation assembly fixedly connected to the right side of the jet flow vibration assembly, and a vortex jet flow assembly fixedly connected to the right side of the quantum cavitation assembly; a backflow mixed phase assembly is fixedly connected in the quantum cavitation assembly and comprises a fixing shaft; the two ends of the fixing shaft are fixedly connected with a first fixing frame and a second fixing frame correspondingly; the middle portion of the fixing shaft is sequentially and rotationally connected with a first flow guider, a second flow guider and a third flow guider from left to right; the first fixing frame and the second fixing frame are fixedly connected in the quantum cavitation assembly; a first variable buckle connector is arranged between the jet flow vibration assembly and the quantum cavitation assembly, and a second variable buckle connector is arranged between the quantum cavitation assembly and the vortex jet flow assembly; and the quantum wax scale treatment integrated device can achieve the purpose of reducing wax scale of a petroleum pipeline.

The invention relates to a positive/negative electrode and a high-energy solid-state vanadium battery using the positive/negative electrode. The positive/negative electrode is prepared by uniformly coating a sealing part of the positive electrode or a sealing part of the negative electrode with a mixture prepared from a vanadium active substance, acid, an adhesive, a conductive agent and a dispersant; on the basis of total mass of all the vanadium active substance, the mass of the adhesive is 0.5 to 10%, the mass of the conductive agent is 0.5 to 20%, and the mass of the dispersant is 1 to 15%; the vanadium active substance is 3.5-valence vanadium ion of 4.5 to 7.0M; the acidity is 3.0 to 6.0M.

The invention discloses a method for preparing anti-freezing type 1,3-dihydroxy methyl-5,5-dimethylheine DMDMH. The method comprises the following steps: stirring formaldehyde with hydantoin and waterto react for 1-2 hours at 50-65 DEG C, wherein the pH value of the reaction system is 7-9; cooling to the room temperature, and finally adding NH4Cl. The product prepared by using the method is simple in synthesis route, simple and easy in raw material obtaining, small in amount of free aldehyde and small in smell, and application tests show that the crystallization temperature of the product is15-20 DEG C lower than that of 1,3-dihydroxy methyl-5,5-dimethylheine which is prepared by using a conventional method, and the problems of storage and use of DMDMH at a low temperature are effectively solved.

The invention relates to the field of cosmetics, in particular to a sunscreen composition and application thereof. The sunscreen composition at least comprises an organic sunscreen agent, an inorganicsunscreen agent and a natural sunscreen agent, and the organic sunscreen agent comprises an aromatic ester ultraviolet light absorber with the refractive index of 1.4-1.6. The sunscreen composition provided by the invention is compounded with the organic sunscreen agent, the inorganic sunscreen agent and the natural sunscreen agent, full-wavelength protection and skin protection are achieved by absorbing and blocking the wavelength within the range of UVA and UVB, the natural sunscreen agent contains rich effective sunscreen components such as tea polyphenol, the sunscreen effect is providedwhile no irritation is caused to the human body, crystallization and precipitation are not likely to happen, the stability is good, and the film forming speed is high.

The invention discloses a kind of dibenzo tetraaza (14) annulene compounds, of which a preparation method and the application in the aspect of a optical recording media. The structural general formula of the compounds is indicated as formula I. The dibenzo tetraaza (14) annulene materials which are provided by the invention have the advantages of high luminous sensitivity, good thermal stability (TG decomposition temperature is more than 250 DEG C), high solubility, easy dissolution and good crystallization resistance. The compounds can be dissolved in the ether solvent, and the solubility in the alcohol or in the ether solvent can be more than 6 percent. The light stabilizer does not need to be added during the production process, only such materials are used alone. The usage of the dibenzo tetraaza (14) annulene materials which are provided by the invention for the optical disk production can not only significantly reduce the production cost of the optical disks, but also greatly improve the recording performance of the disks at the same time of meeting the requirement of current BD-R and HD DVD-R optical disks on the recording media.