31 results about "Borate Boric Acid" patented technology

The invention relates to the field of the preparation of functional sugar, and relates to a method for preparing high-purity lactulose. The method for preparing the high-purity lactulose comprises the following steps of: preparing lactose solution at the concentration of 15 to 20 percent; adding a boric acid and sodium hydroxide (NaOH) into the solution, and adjusting a reaction to obtain conversion liquid; performing ion exchange sodium ion (Na<+>)-removing treatment on the conversion liquid; decoloring a granular active carbon column; removing the boric acid from the lactose solution to obtain a lactose solution dry substance with the boric acid content of less than 1 mg / kg; concentrating the lactose solution until the concentration is 50 to 60 percent; separating by using a 10-bed continuous chromatographic separation device; and performing aqueous phase crystallization, wherein the cooling speeds are 0.8 DEG C per hour at the temperature of between 60 and 50 DEG C, 1 DEG C per hour at the temperature of between 50 and 30 DEG C and 1.1 DEG C per hour at the temperature of between 30 and 13 DEG C. The conversion rate of the lactulose can be increased, so that the yield of the lactulose products is greatly improved; granular active carbon is decolored; moving bed chromatographic separation is continuously simulated, so continuous chromatographic separation of the high-purity lactulose can be realized, the purity of the lactulose reaches over 92 percent so as to facilitate aqueous phase crystallization; and the purity can reach over 98 percent due to the aqueous phase crystallization.

The present invention provides moldable compositions that are capable of drying and hardening if left in open air at room temperature for a period of time. Embodiments of the moldable compositions comprise water, at least one polar polymeric resin (e.g., polyvinyl alcohol), at least one thickening agent (e.g., boric acid, borate salt, or hydrate of a borate salt), at least one humectant (e.g., glycerin, propylene glycol, etc.), at least one filler (e.g., corn starch, tapioca, or arrowroot), optionally at least one releasing agent (e.g., mineral oil) and optionally at least one additive.

The invention belongs to the field of ceramic production and particularly relates to a ground-glaze-free low-temperature transmutation zirconium white glaze formula, a preparation method and a use method thereof. The ground-glaze-free low-temperature transmutation zirconium white glaze formula includes feldspar powder, boric acid, barium borate, limestone, zinc oxide, lead oxide, lead silicate and bentonite. The glaze is low in cost, is convenient to use, is low in sintering temperature and has a unique artistic feel. Glaze surface produced by sintering the ground-glaze-free low-temperature transmutation zirconium white glaze has a zirconium white dark light bottom color, wherein irregular black spots are uniformly distributed on the glaze surface. The size and distribution density of the black spots are changed according to the model of a ceramic product and glaze thickness. The glaze surface has a stone-like appearance and a slight flowing-tendency effect, thereby achieving unique artistic effects. Porcelain produced with the glaze is increased in grade and market price and is high in economic value. The glaze can be produced in large scale, can be popularized quickly and is simple in use, thereby achieving strong market competitiveness.

In one aspect, the present invention is directed to a coating composition. The coating composition comprises photocatalytic particles and an alkali metal silicate binder comprising a boric acid, borate, or combination thereof. In another aspect, the present invention is directed to a coated article. The coated article has a photocatalytic coating with improved durability on its external surface that is formed from the aforesaid coating composition.

The invention provides laminated foil formation liquid, a formation method, and anode foil obtained by the formation method. The formation method comprises the following steps: pretreatment; boiling with water; four-stage formation in a strong reducing agent formation solution; first heat treatment; first dipping; first complementary formation treatment; second dipping; secondary complementary formation treatment; secondary heat treatment; third complementary formation treatment; third dipping; and post-processing to obtain the formed laminated foil, namely the anode foil. The strong reducingagent formation solution is an aqueous solution containing 2-10 wt% of boric acid, 0.01-1 wt% of ammonium borate and 0.001-10 wt% of strong reducing agents. The specific volume of the anode foil obtained by formation using the formation solution is high, and the anode foil is suitable for being used for electrode materials of aluminum electrolytic capacitors.

The invention discloses an environment-friendly sheathed copper brazing filler metal, which comprises a copper brazing filler metal inner core and a copper brazing flux coating adhering thereto, and the raw materials of the copper brazing flux coating include inorganic fluoride, potassium fluoroborate, boric anhydride , boric acid, borate, fluoroaluminate, elemental boron at least one; after the brazing flux raw material, polyvinyl alcohol, methyl cellulose and water are formulated into a flux liquid according to a certain ratio, it is directly coated On the surface of the inner core of the brazing filler metal, the coated brazing filler metal can be obtained after drying. The invention has the advantages of simple production process, low production cost, environmental protection and pollution-free finished solder, convenient use, high bonding strength of coating, etc., realizes convenient, fast, quantitative and efficient pre-addition of flux, effectively reduces flux The amount of usage; because it does not contain organic binders and complies with ROHS standards, the pollution to the environment is greatly reduced during brazing and burning, thereby protecting the health of operators and greatly reducing the labor intensity of the brazing process.

This disclosure relates to a cleaning composition that contains 1) at least one redox agent; 2) at least one organic solvent selected from the group consisting of water soluble alcohols, water soluble ketones, water soluble esters, water soluble sulfones, and water soluble ethers; 3) at least one boron-containing compound selected from the group consisting of boric acid, boronic acids, and salts thereof; and 4) water.

The invention provides modified hollow ceramic microbead of organosilicon, which is prepared from the following raw materials: composite porcelain powder, a decarburizing agent, a coupling agent, ethylene silicone rubber, graystone and thermal conducting filler, wherein the composite porcelain powder is composed of low-temperature porcelain powder, medium-temperature porcelain powder and high-temperature porcelain powder; the decarburizing agent is composed of compound boron series and chloroplatinic acid; the compound boron series is composed of at least 2 of boric acid and borate; the coupling agent is a silane coupling agent; the thermal conducting filler is selected from one or more of aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride, silicon carbide and graphite, the modified hollow ceramic microbead prepared by the invention can protect the ceramic microbead from being crushed in large quantities in the mixing process due to collision with each other,reduce the production cost, and have broad application prospects.

The invention discloses a method for preparing fluoboric acid from a byproduct, namely low-concentration hydrofluosilicic acid of phosphorous acid by a wet process and preparation of the fluoboric acid, and in particular relates to the method for preparing the fluoboric acid by inducing the crystallization by the byproduct, namely the low-concentration hydrofluosilicic acid of the phosphorous acid by the wet process. The method comprises the following steps that: a, the low-concentration hydrofluosilicic acid is sent into a reactor, silicon dioxide is added into the reactor to serve as an inoculating seed, and the stirring is performed; b, a suspension of the hydrofluosilicic acid and the silicon dioxide is preheated to a temperature which is more than 50 DEG C; c, solid boric acid is slowly added into the hydrofluosilicic acid, the ratio of the actual use level to the theoretical use level of the boric acid is between 0.95 and 1.05, and the adding time is between 60 and 70min; d, themixture reacts for 2 to 3h under the condition that the temperature is between 80 and 90 DEG C and the stirring speed is between 50 and 60r / min; e, the filtration is performed immediately after the reaction is stopped; and f, a filtrate is concentrated to a concentration which is more than or equal to 40 percent under the conditions of a temperature of between 50 and 80 DEG C, the pressure of between -0.06 and -0.07MPa, and the like, and is aged for 24 hours to obtain a finished product. The method reduces the feasible concentration of the hydrofluosilicic acid, ensures that dilute acid directly takes part in the reaction without being concentrated, shortens a process route, also avoids the decomposition of the hydrofluosilicic acid during the concentration, and improves the recovery rateof fluorine.

The invention discloses an ash batch material with the function of catalyzing and degrading formaldehyde absorption and a preparation method thereof. In parts by weight, the ash material with the function of catalytic degradation of formaldehyde absorption includes the following components: 30-40 parts of inorganic powder, 5-10 parts of gypsum, 1-5 parts of anatase titanium dioxide powder, and 20 parts of polyvinyl alcohol ~40 parts, 40~60 parts of water and 10~20 parts of crosslinking agent, the acid-base regulator is one or more of hydrochloric acid, sodium dihydrogen phosphate, potassium dihydrogen phosphate, sodium carbonate, sodium bicarbonate , the crosslinking agent is selected from at least one of boric acid, borate, glutaraldehyde, and citric acid. The method comprises the following steps: step 1, weighing polyvinyl alcohol and water according to the weight fraction ratio, heating the water to 90° C. to fully dissolve the polyvinyl alcohol; step 2, adjusting the pH value of the polyvinyl alcohol aqueous solution obtained in step 1 to 2- After 3, mix evenly with cross-linking agent, let stand for 24-48 hours, obtain cross-linked polyvinyl alcohol aqueous solution; Step 3, adjust the cross-linked polyvinyl alcohol aqueous solution pH value that step 2 obtains to 7-8; Step 4, put The cross-linked polyvinyl alcohol aqueous solution obtained in step 3 is uniformly mixed with inorganic powder, gypsum, and anatase-shaped titanium dioxide powder to obtain the ash material with the function of catalytically degrading formaldehyde.

The invention relates to the technical field of flame retardants, and discloses a nitrogen-phosphorus flame retardant and a preparation method thereof. The nitrogen-phosphorus flame retardant comprises the following components in percentage by weight: 5%-10% of a nano flame retardant, 5%-8% of a nitrogen-phosphorus flame retardant, 5%-10% of a vulcanizing agent, 3%-5% of hydrotalcite, 5%-10% of montmorillonite, 10%-15% of zirconium phosphate, 1%-5% of graphite oxide, 5%-10% of a flame-retardant synergist, 1%-5% of boric acid, 2%-5% of zinc borate, 1%-5% of boron phosphate, 5%-9% of silicon dioxide, 1%-5% of aluminum hydroxide, 1% 4% of magnesium hydroxide, 2%-5% of phosphorus oxychloride, 3%-6% of molybdenum disicide and 4%-8% of pyrophosphoric acid. The nano flame retardant is crushed by the crusher, water is added into the nitrogen-phosphorus flame retardant for mixing, the hydrotalcite is heated, the silicon dioxide is crushed by the crusher, and the graphite oxide is ground by a grinding machine. The nitrogen-phosphorus flame retardant and the preparation method thereof have the advantages that the nitrogen-phosphorus flame retardant is convenient to stretch, the breaking strength of the flame retardant is high, the production cost is reduced, the process steps are simplified, the production efficiency is improved, and large-scale production is convenient.

A process for preparing the benzothiophen-2-yl boronate of formula (VI) which serves as an intermediate for production of medicaments and for production of medicaments for treatment and / or prophylaxis of proliferative disorders, such as cancer and tumor diseases.

The invention relates to a method for constructing a beta-fat substituted ketone compound through On-DNA (deoxyribonucleic acid) reaction, which is characterized in that an On-DNA alpha, beta-unsaturated carbonyl compound is used as a raw material and reacts with fat boric acid / boric acid ester or trifluoroborate in the presence of a photosensitizer and alkali to obtain the beta-fat substituted ketone compound. The method disclosed by the invention can be carried out in a mixed water phase of an organic solvent / water phase, the post-treatment is simple, the condition is mild, a high-diversity DNA coding compound library can be obtained in a relatively short time at a high yield, and the method is suitable for synthesizing DNA coding compounds by a porous plate.

The present invention provides a laminated foil chemical conversion solution and chemical conversion method, and an anode foil obtained by the chemical conversion method. The chemical forming method includes: pretreatment; boiling; four-stage chemical forming in a strong reducing agent chemical forming solution; first heat treatment; first immersion; first supplementary forming treatment; second immersion; ; The second heat treatment; the third complementary forming treatment; the third dipping; The strong reducing agent chemical conversion solution is an aqueous solution containing 2-10wt% boric acid, 0.01-1wt% ammonium borate and 0.001-10wt% strong reducing agent, and the anode foil obtained by chemical conversion using the chemical conversion liquid has a high specific volume and is suitable for use in Electrode material for aluminum electrolytic capacitors.

The invention discloses a preparation method of an Ir-O-P type catalyst diboronic acid / ester compound, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps that under the air condition, using an Ir metal complex and a phosphine ligand to form an active Ir-O-P type catalyst; and adding an organic boron source [B], a beta-N-aryl (alkyl) substrate and the Ir-O-P type catalyst into an organic solvent under anhydrous and anaerobic conditions, conducting reacting at 60-120 DEG C, and after the reaction is finished, performing post-treatment to obtain the aryl (alkyl) diboronic acid / borate compound. According to the reaction, the aryl (alkyl) diboronic acid / borate compound can be obtained through a one-pot method, and the limitation that the compound needs to be synthesized in multiple steps and the substrate range is limited is made up. In addition, in the preparation of the aryl triazene diboride, even if no ligand is added, a target compound can be obtained at a high yield, and based on the advantages, the method shows a very high yield after being expanded to a gram-level reaction, and lays a good foundation for application in the field of drug synthesis or material development.