68results about How to "Preparation reaction conditions are mild" patented technology

The invention provides a comb-like polymer fluid loss additive for drilling fluid and a preparation method thereof. The preparation method comprises the following steps of: performing esterification on polyethylene glycol monomethyl ether (PEGM) and maleic acid (MA) to obtain macromonomers; and adding two monomers, namely acrylamide (AM) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) into the macromonomers to perform copolymerization so as to obtain the comb-like polymer fluid loss additive with a long side chain by a solution polymerization method. The prepared comb-like polymer fluid loss additive has the advantages of resisting the temperature of 200 DEG C in the drilling fluid, along with good fluid loss reducing effect on the drilling fluid such as fresh water, saline and the like, capacity of controlling the drilling liquid to keep high rheological property under the condition of high temperature and high salinity, high temperature and salt resistance, stable fluid rheological property, mild synthesis condition, low equipment requirement and simple process.

The invention provides a preparation method of a graphene/chitosan porous sponge oil absorption material. The preparation method is characterized by comprising the following steps: (1), preparing a chitosan solution under a room temperature condition, carrying out ultrasonic dispersion on an oxidized graphene solution, slowly adding the graphene solution into the prepared chitosan solution while stirring, and fully blending so as to obtain an uniformly mixed graphene/chitosan solution, wherein the content of the oxidized graphene is 6%-30%; (2) preparing a glutaric dialdehyde solution, slowly adding the glutaric dialdehyde solution into the prepared graphene/chitosan mixed solution, stirring and uniformly mixing, and then carrying out crosslinking for 1-4 hours at 60-100 DEG C; and placing the solution with different graphene and chitosan mixture ratios into a mould and refrigerating, placing a refrigerated sample into a vacuum freezing drier, and freezing and drying for at least 24 hours, thus obtaining the graphene/chitosan porous sponge material with a three-dimensional structure. The graphene/chitosan porous sponge material has the advantages that the porosity is large, the adsorption rate is high, the adsorption stability is good and the repeating utilization ratio is high.

The invention discloses aminosilicone durable hydrophilic potentiating agent, and a preparation method and the application thereof. The preparation method is that methyl silicone oil containing hydrogen, allyl-terminated epoxy-terminated compound and allyl polyether are reacted under the effect of platinum catalyst in oxygen-free condition, so that the aminosilicone durable hydrophilic potentiating agent is obtained. The method has the advantages that the reaction step is simple, the reaction condition is mild, and the method is simple and easy. The aminosilicone durable hydrophilic potentiating agent not only can be independently used before and after the softening finish of traditional aminosilicone, but also can be co-bathed with traditional aminosilicone emulsion; as the agent has good penetrability, wettability and reactivity, the agent can not only keep the soft and smooth feel of the traditional aminosilicone, but also give good hydrophilicity to fabrics in the condition that the use level is low, and also has durability; and the difference between the fabric finished by the aminosilicone durable hydrophilic potentiating agent and the fabric finished by the independently used traditional traditional aminosilicone emulsion is that fabric treated by the aminosilicone durable hydrophilic potentiating agent can be directly repaired without treatment.

The invention relates to a preparation method of fluoroethylene carbonate, which comprises the following steps that quaternary phosphonium salt and/or a quaternary phosphonium salt derivative serve/serves a phase transfer catalyst; raw fluoroethylene carbonate and a fluorination reagent perform a catalysis fluoro reaction at 0-120 DEG C at normal pressure; and fluoroethylene carbonate is synthesized, wherein a mole ratio of raw fluoroethylene carbonate to the fluorination reagent is 1:1.0-1:1.5, and the consumption of the phase transfer catalyst is 0.01-15% of the mass of fluoroethylene carbonate. With the adoption of the method, a high-yield fluoroethylene carbonate product can be obtained within a relatively short time under a mild condition.

The invention discloses a preparation method of water phase CdTe/CdSe core-shell quantum dots for rapid fingerprint appearance, and belongs to the field of biomarkers. The method comprises the following steps: mixing a certain solubility of cadmium salt and a mercapto compound, adjusting pH to be 8-11 with NaOH to obtain a stable cadmium salt complex; dissolving Te powder and NaBH4 in deionized water, blowing with N2 to remove O2, heating in water bath at about 90 DEG C until no color to obtain a Te precursor; heating Se powder and a Na2SO3 water solution for reflux reaction until Se is completely reacted to obtain a Se precursor; adding the Te precursor into the cadmium salt complex under the N2 protection, heating for reflux to obtain CdTe quantum dots; adding a certain amount of the Se precursor to the CdTe quantum dots, heating for reflux to obtain the CdTe/CdSe core-shell quantum dots. The invention provides a simple and rapid preparation method of water soluble phase fluorescent core-shell quantum dots, and the preparation method has good biocompatibility, and can be used for appearance.

The invention discloses polycarboxyl silicon dioxide nanoparticles and a preparation method thereof. The preparation method comprises the following steps: by using hydroxy silicon dioxide nanoparticles as the initial raw material, treating with an aminosilane coupling agent to introduce reactive amino or amine group, and reacting with N,N-carbonyldiimidazole-activated butane tetrabasic carboxylic acid under very mild conditions to introduce 3,4,5-tricarboxylvaleryl group onto the surface of the hydroxy silicon dioxide nanoparticles, thereby obtaining the surface-polycarboxylated modified silicon dioxide nanoparticles. By using the butane tetrabasic carboxylic acid to perform carboxylation modification on the hydroxy silicon dioxide nanospheres, the polycarboxyl silicon dioxide nanoparticles have the advantages of high carboxyl content and controllable carboxyl content; and since the reaction conditions for the N,N-carbonyldiimidazole-activated butane tetrabasic carboxylic acid and amino group are very mild, the reaction is easy to perform and is complete. The method disclosed by the invention has the advantages of simple preparation technique and accessible raw materials, and is easy for industrial production and popularization.

The invention discloses a polycaprolactone/amylase amphiphilic block polymer. The preparation method thereof adopts the steps that: firstly, hydroxyl at the terminal of terminal hydroxyl polycaprolactone has esterification reaction with terephthalaldehydic acid to generate terminal aldehyde polycaprolactone, then hemiacetal hydroxyl at the reducing terminal of amylase has reduction and amination reaction with excess hexanediamine under the catalysis of sodium cyanoboronhydride to generate terminal amido amylase, and finally, polycaprolactone/amylase amphiphilic block polymer is obtained through coupling reaction between terminal aldehyde polycaprolactone and terminal amido amylase under the catalysis of sodium cyanoboronhydride. The polycaprolactone/amylase amphiphilic block polymer of the invention can form micelle in water, and also form reversed micelle in an organic solvent. The polycaprolactone/amylase amphiphilic block polymer of the invention not only has the capability of forming micelle in water or the organic solvent, but also has the advantages of good performance, strong functions, and broad application range, thereby having potential application value in the biological medicine field.

The invention discloses a flame-retardant silane crosslinking agent and a preparation method thereof. The flame-retardant silane crosslinking agent has one or more of the following structures: X3Si-R1-DPPA-R2-SiX3 and X3Si-R3-DAPO-R4-SiX3. The preparation method comprises the following steps of: 1) under the protection of inert gas, dissolving phosphorous azacyclo reactant into an organic solvent, adding a silane coupling agent and the corresponding catalyst, and stirring and reacting at the temperature of 25 to 150 DEG C for 0.5 to 24 hours to obtain reaction liquid, wherein the phosphorous azacyclo reactant is DPPA and/or DAPO; and 2) filtering or rotationally evaporating the reaction liquid, washing and drying to obtain the target product. The flame-retardant silane crosslinking agent can take part in reactions such as crosslinking and polycondensation through a silane active group and form one part of a polymer molecular structure, so that the polymer has an intrinsic flame-retardant function or can improve the flame resistance and can also be used for improving the compatibility of some inorganic fillers or additive flame retardant and high molecular materials. The method has the advantages of mild reaction condition, controllable and adjustable reaction process, high yield and the like.

The invention discloses a process for degrading wastewater through an N-doped coated TiO2 photocatalyst. The adopted visible-light-induced photocatalyst is an N-doped disordered nano coated TiO2 photocatalyst. According to the catalyst, disordered nano coated TiO2 with a thin multi-layer core-shell structure is prepared first, N is doped in situ in crystal lattices, and due to the structural specificity and doping of the element N, photocatalytic degradation activity of TiO2 on organic dyes is improved. According to the process disclosed by the invention, the problem in the prior art that dyestuff wastewater is low in degradation efficiency is solved, and the process is applicable to organic dyes in contaminated water.

The invention relates to a method for synthesizing diethanolamine acrylate compounds. The method comprises the following steps: adding an organic solvent, a catalyst, a polymerization inhibitor and methyl acrylate or methyl methacrylate into a reactor, dropwisely adding diethanolamine compounds into the reaction system, and reacting at 0-90 DEG C for 0.5-12 hours to generate the diethanolamine acrylate compounds, wherein the mole ratio of the catalyst to the methyl acrylate or methyl methacrylate is 0.01-15%, the mole ratio of the methyl acrylate or methyl methacrylate to the diethanolamine compounds is 2.0:1-10.0:1, and the catalyst is supported zinc bromide. The method can be used for efficiently preparing the diethanolamine acrylate products under mild experimental conditions in an environment-friendly mode.

The invention discloses a silica-based carborane polymer and a preparation method thereof. The preparation method specifically comprises the following steps: preparing 1,1'-alkylsilylidene-2,2'-bis(hydroxydimethylsilyl)bicyclaborane from a reaction raw material, namely 1,1'-alkylsilylidene-2,2'-bis(dimethylsilyl)bicyclaborane; and reacting by virtue of trivinyl trimethyl cyclotrisilazane as an initial raw material and dimethylchlorosilane, so as to obtain 1,3,5-trimethyl-1,3,5-tris[beta-(dimethylsilyl)ethyl]cyclotrisilazane, carrying out condensation polymerization so as to obtain a polymer with reactivity, and coating the surface of carbon fiber with the polymer so as to obtain a silica-based carborane cross-linked polymer protected carbon fiber material. Prepared carborane has very excellent heat resistance and anti-oxidation function. A preparation process of the silica-based carborane polymer is simple and convenient, reaction conditions are mild, and the raw materials are easily available; and the preparation process is suitable for enlarged production.

The invention discloses preparation of an alpha,alpha-disubstituted-beta-nitro ester compound containing a full-carbon quaternary carbon chiral center and a nitrogen aromatic heterocyclic ring and derivatives thereof. In an organic solvent, under catalysis of a bisoxazoline chiral ligand-nickel catalyst or a phosphine-oxazoline chiral ligand-copper catalyst, 2-acetyl aza aromatic hydrocarbon and alpha-substituted-beta-nitro acrylate are subjected to a reaction to synthesize a compound represented by the formula I; the compound is further converted to gamma-butyrolactone compound represented by the formula II (1), beta 2,2-amino acid ester compound represented by the formula II (2), a succinate compound represented by the formula II (3), or a gamma-lactam compound represented by the formula II (4). The preparation has the advantages of mild reaction conditions, high yield, and high optical purity, and provides a tool for asymmetric synthesis of the alpha,alpha-disubstituted-beta-nitro ester compound containing the full-carbon quaternary carbon chiral center and the nitrogen aromatic heterocyclic ring and the derivatives thereof.

The invention discloses a preparation method of a ferroferric oxide coated diamond Fenton-like catalyst, which comprises the following steps: (1) sequentially carrying out dilute hydrochloric acid impurity removal, water washing and ethanol ultrasonic cleaning on diamond, and washing with water until the diamond is neutral to obtain impurity-removed diamond; (2) sequentially carrying out dilute nitric acid treatment and water washing on the impurity-removed diamonds to obtain clean diamonds; and (3) adding FeCl3. 6H2O and oleic acid into the reaction kettle, completely dissolving, adding ethanol, adding clean diamond, reacting, carrying out gradient cooling after the reaction is finished, cleaning and drying to obtain Fe3O4 microsphere coated diamond powder, namely the Fenton-like catalyst. In the application, in order to coat the surface of the diamond with the iron oxide, the surface of the diamond is firstly cleaned and activated to be more easily combined with the metal oxide, andthen the surface of the diamond is coated with the metal oxide by adopting a solvothermal reaction, so that the surface of the diamond is coated with the iron oxide.

The invention relates to a method for preparing industrial safinamide mesylate, and belongs to the technical field of organic synthesis. The method comprises the steps that a compound 3-fluorobenzylchloride and a compound p-hydroxy benzaldehyde react to generate a compound 4-(3-fluorophenyl)benzaldehyde, then the compound 4-(3-fluorophenyl)benzaldehyde and (S)-2-amino methyl propionate hydrochloride are condensed to prepare a compound (S)-2-[4-(3-fluorophenyl)benzylamine]propanamide, the compound (S)-2-[4-(3-fluorophenyl)benzylamine]propanamide is subjected to catalytic hydrogenation reducing with Pd/C, and the product is recrystallized through methylbenzene and then salified with methanesulfonic acid. A new industrial synthesis selection mode is provided, the synthesis mode has the advantages of being easy and convenient to operate, simple in aftertreatment, lower in cost, environmentally friendly and the like, the high-quality target product can be obtained, and industrial production is promoted.

The invention discloses an anti-blue-ray resin composition, which comprises the following components in parts by weight: 60-84 parts of matrix resin, 1.5-3.5 parts of melanin nanoparticles, 1-4 partsof a UV absorbent, 2-5 parts of polyvinylpyrrolidone, 3-6 parts of allyl alcohol, 0.5-1.4 parts of calcium hydroxide and 0.7-1.5 parts of potassium carbonate. The preparation reaction conditions of the resin composition are mild, no pollution is caused, and the cost is low; the melanin nanoparticles are introduced into the resin composition, so that the original color of the color is not lost while a certain proportion of blue light is absorbed; besides, in the preparation process of the resin, the melanin nanoparticles are compounded with polyvinylpyrrolidone, so that the dispersity of the melanin nanoparticles in the resin composition can be greatly improved, the effective area for absorbing blue light is larger, and the melanin nanoparticles are promoted to play a better blue light absorption role in the resin composition.