65results about How to "Control the rate of hydrolysis" patented technology

Provided is a composition for forming an antifouling coating film which, in seawater, can effectively have antifouling performance over long and has a small temperature dependence of coating film dissolution rate and which is highly safe for the environment. The antifouling coating composition is characterized by comprising (A) a triorganosilyl-ester-containing copolymer obtained from a mixture of (a) a triorganosilyl methacrylate monomer represented by general formula (1) (wherein R<1>, R<2>, and R<3> are the same or different and each represents an alpha-branched C3-6 alkyl or phenyl) and (b) a methoxyalkyl methacrylate monomer represented by general formula (2) (wherein R<4> represents a C2-4 alkylene), the content of the monomer (a) in the mixture being 45 to 65 wt.% and the total content of the monomer (a) and the monomer (b) in the mixture being 80 wt.% or higher, and (B) at least one copper salt selected from the copper salt of rosin and the copper salts of rosin derivatives.

The invention provides a preparation method of nanometer lithium titanate covered with double highly-conductive materials. Through a sol-gel method, a La[0.5]Sr[0.5]Sc[0.1]Mn[0.9]O3 / C-Li4Ti5O12 anode material is prepared by a step of blending a soluble Li compound and a soluble Ti compound according to a molar ratio of Li / Ti=0.8-1.0, adding into an alcohol-water mixed solvent containing a hydrolysis inhibitor, adding a bi-component chelating agent, subjecting the bi-component chelating agent and metal ions to chelation under alkaline conditions, and stirring and heating to form gel; a step of dissolving a La compound, a Sr compound, a Sc compound and a Mn compound into an alcohol-water mixed solvent according to a molar ratio of La: Sr: Sc: Mn=0.5:0.5:0.1:0.9, adding the bi-component chelating agent, subjecting the bi-component chelating agent and metal ions to chelation under alkaline conditions, and stirring to form sol; a step of mixing the gel and the sol and stirring to form co-gel to obtain a sintering precursor; and a step of ball milling and calcining at 900-1150 DEG C for 5-15 h. The lithium titanate prepared by the method has good dispersion effects and excellent electrochemical performance, and the agglomeration phenomenon of nano-powder is improved significantly.

Disclosed is the silicon oxide integument phosphor powder covered with silicon oxide on the surface of the phosphor powder. The method of integument comprising: preparing suspension at the concentration 0.2~5% with color plasma panel display phosphor powder and water, weighing relevant quantity of sodium silicate with nine water according to the proportion between silicon oxide and phosphor powder by weight (0.5~20): 100, adding to the phosphor powder suspension, dispersing with supersonic wave and stirring to make it dissolved and the phosphor powder suspension stable, employing strong acid as precipitator and preparing solution with concentration 0.01~2M; heating the phosphor powder suspension to 20~120 DEG C, stirring and dispersing with supersonic wave at the same time, stirring with speed 100r / m~ 300r / m and dropping the precipitator into the phosphor powder suspension at the speed of 5~500ml / min to make the pH value 3~11, then keeping the temperature and stirring for 30~180 minutes; getting the integument phosphor powder after centrifugalizating the phosphor powder suspension, washing, dewatering and drying at 60-120DEG C to make the integument phosphor powder moisture percentage below 0.25%,incandescing at 200~400 DEG C for 1~3hours and air cooling in the furnace.

The invention relates to a high-nitrogen-concentration composite microbial fertilizer and a preparation method thereof, wherein the raw materials of the high-nitrogen-concentration composite microbial fertilizer comprise the following components in percentage by weight (wt%): 10-33% of urea, 5-20% of microbial strain agent, 10-40% of organic materials and 30-70% of water. The preparation method comprises the following steps of: adding the materials to a fermentation container, stirring evenly, fermenting for 15-25 days, adding appropriate monopotassium phosphate when lots of gas gives off and after detecting that the weight percentage concentration of ammonium nitrogen of the materials fermented completely is lower than 2%, thereby obtaining the composite microbial fertilizer in liquid or solid form, and finally, weighing and packaging. According to the invention, active small molecular amide nitrogen is transformed and fixed into slow-release macromolecular organic nitrogen through biochemical reaction of microorganisms; therefore, the content of nitrogen nutrient in the composite microbial fertilizer is improved and the activity and amount of microorganisms also are guaranteed; besides, the utilization rate of urea is improved and pollution on the natural environment caused by easy loss of nitrogen is reduced. As a result, a novel, long-acting, environmentally-friendly composite microbial fertilizer is developed.

The invention discloses a method for preparing high-coulombic efficiency lithium ion battery negative pole material chrysanthemum-shaped nanometer titania. The method comprises the following steps: dissolving a titanium source compound in short-chain monohydric alcohol, stirring to form a clarified solution, adding polyhydric alcohols, further stirring to form a clarified solution, carrying out a hydrothermal reaction, forming a complex with the titanium source compound by utilizing the polyhydric alcohols as guide agents and inducers, controlling hydrolysis of the titanium source compound by taking the short-chain monohydric alcohol as a dispersing agent so at to generate a titania precursor, and performing low-temperature heat treatment, thereby obtaining the lithium ion battery negative pole material chrysanthemum-shaped nanometer titania. The preparation method disclosed by the invention is simple in process and easy to operate, and raw materials are readily available; the high-coulombic efficiency lithium ion battery negative pole material chrysanthemum-shaped nanometer titania is low in cost and environmentally friendly, special equipment is not needed in the whole reaction process, the industrial production is promoted, the final product is high in quality, and according to the prepared nanometer / micron grading structure, the aims of shortening the ion transport distance and improving the conductivity and ion diffusion rate of the material can be simultaneously achieved, so that the material has excellent rate capability, stable cycle performance and high coulombic efficiency. The material prepared by the invention is an ideal lithium ion negative pole material with wide commercial application prospects.

The invention discloses an HMS@NiPt@Beta core-shell structure catalytic material and a preparation method and application thereof. According to the catalytic material, a microporous Beta molecular sieve serves as a core, a mesoporous HMS molecular sieve serves as a shell, NiPt bimetallic nanoparticles are evenly distributed on the surface of the microporous Beta molecular sieve, the core of the microporous Beta molecular sieve is prepared through a hydrothermal synthesis method, niPt bimetallic nanoparticles are loaded on the surface of the microporous Beta molecular sieve through a low-temperature oxygen plasma treatment technology, the mesoporous HMS molecular sieve shell is prepared through a vapor phase crystal transformation method, and based on the total mass of the catalytic material, nickel accounts for 10-30 wt%, platinum accounts for 0.01-5 wt%, the microporous Beta molecular sieve core accounts for 40-60 wt%, and the balance is the mesoporous HMS molecular sieve shell. The catalytic material is applied to a reaction for catalyzing dehydrogenation coupling of pyridine to synthesize 2, 2'-dipyridyl, has the advantages of low dosage, few side reactions, short process and the like, and has a good application prospect in the fields of adsorption separation, petrochemical engineering, fine chemical production and the like.

The invention relates to a low carbon olefin oligomerization process control method. The method comprises the following steps: (1) enabling a sodium dihydrogen phosphate water solution in an acid water tank to enter from the upper part of a neutralization sedimentation tank through an acid water pump; (2) inputting low carbon olefin and low pressure steam into a heater, and heating to respectively obtain low carbon olefin and low pressure steam condensate; discharging the low pressure steam condensate; enabling the low carbon olefin to enter from the bottom of the neutralization sedimentation tank; (3) enabling the low carbon olefin to contact with the sodium dihydrogen phosphate water solution reversely, and regulating and controlling the water content of the low carbon olefin according to a mode; (4) when the water content of the low carbon olefin is 200ppm-3000ppm, performing oligomerization on the low carbon olefin and a solid phosphoric acid catalyst, thus obtaining a reaction product; (5) enabling steam and water in a balanced state in a steam pocket to flow inside from the lower part of a reactor under potential difference action, and reacting with the reaction product obtained in the step (4), thus respectively obtaining C5-C16 olefin products and steam; enabling the steam to return to the steam pocket; detecting the C5-C16 olefin products by an online acidity analyzer, and then discharging. The low carbon olefin oligomerization process control method can achieve the aim of real-time monitoring.

The invention discloses a polypyrrole-graphene / polyurethane antifouling paint, a preparation method and application thereof, wherein the polypyrrole-graphene / polyurethane antifouling paint is composed of component A and component B; in parts by weight, A The components are mainly composed of the following raw materials: 500 parts of group-hydrolyzed polyurethane prepolymer, 25-50 parts of bentonite, 25-50 parts of titanium dioxide, 60-120 parts of zinc oxide, 15-30 parts of talc, polypyrrole-graphene 15-30 parts of nanofillers; by weight, component B is mainly composed of the following raw materials: 5-7 parts of leveling agent, 5-7 parts of defoamer, 6-15 parts of chain extender, 10 parts of silane coupling agent ‑25 parts, 1-2 parts of catalyst. The present invention is a two-component polyurethane coating, which has good adhesion, anti-collision and crack resistance, and can also improve antifouling performance and antifouling durability.

The invention provides a preparation method of a three-dimensional multistage flower-like cobalt-titanium spinel nano material, which comprises the following steps: dissolving a cobalt source in an ethylenediamine solution to obtain a cobalt source-ethylenediamine precursor; dissolving a titanium source in an aqueous solution of glycerol to obtain a titanium source-glycerol precursor; adding the cobalt source-ethylenediamine precursor and the titanium source-glycerol precursor into an alkaline solution, uniformly mixing, reacting at 180-220 DEG C for 12-48 hours, and carrying out centrifuging,washing and drying after the reaction is finished, thereby obtaining the three-dimensional multi-stage flower-like cobalt-titanium spinel nano material. The cobalt-titanium spinel nano material prepared by the method has a spherical flower-like microstructure, and has the characteristics of monodispersity, pure phase crystal form, developed pore structure (about 10.8nm), large specific surface area (113.6m<2>.G<-1>) and the like. The preparation method disclosed by the invention has the advantages of simple process, low cost, convenience and quickness, high yield and easiness in large-scale production.

The invention discloses a preparation method of phenyl silicone oil, the preparation method comprises the following steps: (1) adding a hydrolysis mixed solution and dimethyl alkoxy silane into diphenyl alkoxy silane to have a hydrolysis reaction to obtain a hydrolysate, wherein the speed ratio of the dimethyl alkoxy silane to the hydrolysis mixed solution is (3-10):1, the hydrolysis mixed solution comprises a hydrolysis catalyst, a hydrolysis accelerator and water; (2) adding an end capping agent and a polymerization catalyst into the hydrolysate to have a polymerization reaction, adding a hydroxyl remover in the process of the polymerization reaction, and finishing the reaction to obtain a finished product. The dimethyl alkoxy silane and the hydrolysis mixed solution are added into the diphenyl alkoxy silane at certain speed ratio, the hydrolysis speed is effectively controlled, the phenyl in the hydrolysate is more evenly distributed, the prepared hydrolysate is clear and transparent, the hydrolysate with the evenly distributed phenyl is obtained without rearranging at the high temperature, and the quality of a final product, the phenyl silicone oil, is improved.

The invention discloses a preparation method of an ether-based high water-retaining polycarboxylate water-reducer, which comprises the following steps: (1) esterification reaction; (2) monomer blending; (3) copolymerization reaction; (4) and react. The preparation method of the present invention grafts glucose, the esterification product of the first compound, and the unsaturated fluorine-containing monomer into the polycarboxylic acid molecular chain by copolymerization, and introduces glucose into the molecular structure of the prepared polycarboxylate water reducer. Ester structure, fluorophenyl structure, phosphoric acid group structure, amino structure, etc., under the mutual synergy of these structures, the polycarboxylate superplasticizer of the present invention has high water retention and can effectively lock the water in concrete , control the hydrolysis rate of the ester group, will not lag behind bleeding, and the concrete fluidity is stable.

The invention discloses a tantalum oxide chlorine micron cubic crystal photocatalyst as well as a preparation method and application thereof. The preparation process comprises the following steps: dissolving Ta5+ tantalate in a mixed solution of concentrated hydrochloric acid and carboxylic acid, wherein the molar ratio of HCL to carboxylic acid is 1:(1.4-5.6); performing hydrolysis reaction on the mixed solution containing tantalate at a temperature of 100-240 C degree for 3-18 hours; cooling naturally, filtering and collecting precipitate and drying to obtain the tantalum oxide chlorine micron cubic crystal. The preparation method is simple, moderate in reaction and good in repeatability and can be widely applied to preparation of a single crystal structure of metal oxide of which the precursor is hydrolyzed rapidly; the micron cubic crystal is high in crystallization degree, strong in light absorption ability, high in charge migration efficiency and has a relatively strong photocatalytic hydrogen generation ability and a wide application prospect in the field of solar energy utilization and photochemistry conversion.

The invention discloses a sulfated zirconium phosphonate solid strong acid porous material. The granule diameter of the material is from tens of microns to hundreds of microns, the material is in a mesoporous-macropore structure, the pore diameter of a macropore is 300-500nm, a pore wall of which the diameter is 1.6-2.2nm between macropores is in a mesoporous structure, the specific surface area is 400-650m<2> / g, and the exchange capacity of a hydrogen ion is 5.4-6.6mmol / g. The porous material has the advantages that the acidity is strong, and the porous material has a higher actual industrial production value.

The invention relates to a low carbon olefin oligomerization process control method. The method comprises the following steps: (1) enabling a sodium dihydrogen phosphate water solution in an acid water tank to enter from the upper part of a neutralization sedimentation tank through an acid water pump; (2) inputting low carbon olefin and low pressure steam into a heater, and heating to respectively obtain low carbon olefin and low pressure steam condensate; discharging the low pressure steam condensate; enabling the low carbon olefin to enter from the bottom of the neutralization sedimentation tank; (3) enabling the low carbon olefin to contact with the sodium dihydrogen phosphate water solution reversely, and regulating and controlling the water content of the low carbon olefin according to a mode; (4) when the water content of the low carbon olefin is 200ppm-3000ppm, performing oligomerization on the low carbon olefin and a solid phosphoric acid catalyst, thus obtaining a reaction product; (5) enabling steam and water in a balanced state in a steam pocket to flow inside from the lower part of a reactor under potential difference action, and reacting with the reaction product obtained in the step (4), thus respectively obtaining C5-C16 olefin products and steam; enabling the steam to return to the steam pocket; detecting the C5-C16 olefin products by an online acidity analyzer, and then discharging. The low carbon olefin oligomerization process control method can achieve the aim of real-time monitoring.

The invention discloses a method for preparing pearlescent pigment by taking flaky alpha-aluminum oxide as a matrix, which comprises the following steps: firstly, taking flaky alpha-Al2O3 as a matrix liquid, and adding an adsorbent and an acidic pH regulator I to prepare a water suspension solution with negative charges on the surface of the flaky alpha-Al2O3; adding a metal salt solution and an alkaline pH regulator II into the aqueous suspension solution, and carrying out hydrolysis coating reaction to obtain a pearlescent pigment precursor; and finally, filtering, washing, drying and calcining the pearlescent pigment precursor to obtain the pearlescent pigment. The prepared pearlescent pigment can present a remarkable pearlescent effect, and the pigment has relatively high chemical stability and mechanical stability; and the application range is wide, and the coating can be applied to long-term outdoor service products and high-temperature environments.