40results about How to "Guaranteed catalytic efficiency" patented technology

The invention relates to a boroxol monotitanocene catalyst with high polymerization activity to alpha-olefin and high solubility in water, a relative preparation method and an application. The preparation method comprises synthesizing borate titanium trichloride from borate and titanium tetrachloride at the mol ratio of 1.00-1.05, reacting trimethylsilyl compound of cyclopentadienyl, lindenyl or relative derivative with borate titanium trichloride at the mol ratio of 1.05-1.10 to obtain borate titanium trichloride, reacting phenol or alcohol, pyrindine and borate dichloro monotitanocene at themol ratio of 1:1:1.05-1:1:1.1 to obtain boroxol monotitanocene catalyst. The invention uses borate group to lead into oxygen atoms, thereby stabilizing molecule structure and improving the solubilityand stability of the product in hexane with confirmed catalysis efficiency. The product is suitable for the homogeneous or slurry polymerization whose solvent is hexane. The synthesis method is simple. And the product can be used to synthesize the homopolymer or copolymer from ethylene or / and alpha olefin.

The invention relates to a single metallocene-titanium catalyst containing a phosphate ester ligand and a preparation method and application thereof. The preparation method comprises the following steps: performing reaction on 0.2 mol / L titanium tetrachloride hexane solution and 0.5 mol / L phosphate ester hexane solution for 2 hours according to the mol ratio of 1.00-1.05, and obtaining greenish yellow phosphate ester titanium trichloride; performing reaction on trimethyl silicane compounds of metallocene groups, indene groups or one derivative of the metallocene groups and the indene groups, and the phosphate ester titanium trichloride for 24 hours at a temperature of between 60 and 70 DEG C according to the mol ratio of between 1.05 and 1.10, and obtaining phosphate ester dichloro-singlemetallocene-titanium; and performing reaction on phenols or alcohols, pyridine and the phosphate ester dichloro-single metallocene-titanium according to the mol ratio of between 1:1:1.05-1:1:1.1, andobtaining phosphate ester single metallocene-titanium compounds. The catalyst has a stable molecular structure in hexane and is easy to dissolve, and the synthesis method is simple and convenient, suitable for homogeneous polymerization or slurry polymerization by adopting the hexane as a solvent, and used for synthesizing homopolymers or copolymers by adopting ethylene and alpha-olefin as raw materials.

The invention relates to a low-smoke, halogen-free, high-temperature-resistant flame-retardant vinyl ester resin and a preparation method thereof, belonging to the technical field of flame-retardant vinyl ester resins. It is prepared from epoxy resin, unsaturated monobasic acid, reactive flame retardant, additive flame retardant, catalyst, polymerization inhibitor and crosslinkable monomer through a series of reactions. The invention is composed of raw materials with low price, low preparation cost, combined with the comprehensive effect of two kinds of flame retardants, reactive type and additive type, and the flame retardant effect is better than similar products on the market; the flame retardant resin is low-smoke and halogen-free, and can replace existing Brominated flame retardant chemically modified vinyl resin with halogen environmental protection issues; moderate viscosity, good construction performance, good anti-settling performance, outstanding corrosion resistance and high temperature resistance, can be used for building materials, automotive parts, etc., especially for FRP products that require low-smoke, halogen-free and flame-retardant requirements such as hand lay-up railway passenger car parts.

The invention relates to a boroxol cyclopentadienyl zirconium metal catalyst, a preparation method and an application. The preparation method comprises adding zirconium dichloride ethylene glycol dimethyl ether solution containing bis (cyclopentadienyl), bis (lindenyl) or relative derivative groups, whose density is 0.02mol / L, mixing and slowly adding boric acid dibasic ester compound and the ethylene glycol dimethyl ether solution of pyridine in 20min, while the pyridine density is 0.02mol / L and the density of boric acid dibasic ester is 0.02mol / L, wherein the mol ratio of boric acid dibasicester compound, pyridine and the irconium dichloride containing bis (cyclopentadienyl), bis (lindenyl) or relative derivative groups is 1:1:1-1:1:1.05, reacting for 8h, and after the reaction, and evaporating the ethylene glycol dimethyl ether solution to obtain boroxol cyclopentadienyl zirconium metal catalyst. The synthesis materials are cheap, the process is simple, the yield is high, the catalystic polymerization activity is high, the product can be used for the homopolymerization or copolymerization of ethylene and alpha olefin and the synthesized copolymer has adjustable structure.

The invention discloses a kind of O 3 / Photocatalytic advanced oxidation reaction system and method for high concentration wastewater. The wastewater treatment system includes a pretreatment module (8), an ozone generator (9) and a reaction device (1), the reaction device includes a housing (2), an ultraviolet light generator (3) and a photocatalyst transmission assembly, The photocatalyst transmission assembly includes a main body part (4) and a plurality of branch parts (5) for dispersing photocatalysts; the advanced oxidation wastewater treatment method includes three steps: wastewater pretreatment, advanced oxidation, and reflux treatment. Beneficial effects of the present invention: the present invention adopts two advanced oxidation methods of ozone and photocatalysis to synergistically treat high-concentration wastewater, improves treatment efficiency, reduces the amount of ozone put in, reduces the use of corrosive raw materials, reduces equipment loss, and reduces The production cost is increased, the contact area between the photocatalyst and the wastewater to be treated is increased, the replacement and recovery of the photocatalyst is convenient, and the degradation efficiency is improved.

The invention provides a method for preparing phenylaniline, which comprises the following steps: mixing cyanophenyl shown in the formula II, first alkaline compounds, nickel catalysts and borophenylic acid shown in the formula III or borophenylic esters shown in the formula VI to carry out suzuki coupling reaction for obtaining cyanobiphenyl shown in the formula IV; mixing the cyanobiphenyl, second alkaline compounds and oxyful, and hydrolyzing the cyanobiphenyl to obtain amido biphenyl shown in the formula V; and mixing the amido biphenyl, third alkaline compounds and sodium hypohalite to generate Hofmann degradation reaction for obtaining phenylaniline shown in the formula I, wherein R1 is chlorine, bromine, iodine, sulphonic acid ester radicals, carbonic ether radicals or alkyl ester radicals; R2 is alkyl, alkoxy, cyano, amido or hydrogen; R3 is chlorine, bromine or iodine; and R4 is alkyl, alkoxy, cyano, amido or hydrogen. The preparing method provided by the invention has the advantages of mild condition, low cost, cleanness and environment protection.

The invention belongs to the technical field of nanomaterial dispersion liquid and discloses antifreeze nanomaterial dispersion liquid and a preparation method thereof. The antifreeze nanomaterial dispersion liquid is technically characterized by comprising a nanomaterial and single-phase liquid, a weight part ratio of the nanomaterial to the single-phase liquid is 1:(1-3), and the single-phase liquid includes one of pure water, alcohol liquid or ketone liquid. The prep0aration method includes steps of determination of a maximum content of the antifreeze dispersion liquid stabilization solid-phase nanomaterial in liquid, determination of stirring time and preparation of antifreeze nano dispersion liquid. After freezing and thawing cycle, influences on original performances are effectivelyreduced, and accordingly catalytic efficiency and performances of the nanomaterial dispersion liquid are guaranteed fundamentally. The preparation method is simple and convenient to operate, and dispersity, stability and freeze resistance of the nanomaterial dispersion liquid can be improved.

The invention discloses a magnetic sandwich-structured MOFs (metal-organic frameworks) material and a preparation method, and belongs to the field of material synthesis. The core of the material is MOFs, the MOFs core is coated with a layer of nano-Fe3O4 particles, and an MOFs thin layer is arranged outside the nano-Fe3O4 particles. The preparation method of the material comprises the following steps: putting MOF particles in an MOF precursor solution, and performing ultrasonic dispersion to obtain suspension A; dispersing Fe3O4 particles and polyvinylpyrrolidone in a polar solvent, and performing ultrasonic dispersion to obtain suspension B; mixing and ultrasonically dispersing the suspension A and the suspension B, performing water bath oscillation and heating to obtain sandwich-structured particles, performing magnetic separation to obtain needed particles, and cleaning and drying the particles. The material can have excellent adsorption and catalytic performance simultaneously, andthe material after adsorption can have better regeneration performance.

The invention discloses a device for tritiation removal of tritium-containing water and an implementation method thereof. The problems that a tritium-containing water tritiation removal device is complicated in process and high in energy consumption are solved by adopting the device. The device comprises a first liquefaction system, a steam heating device, a catalytic reaction section, a second liquefaction system and a product water collecting tank which are connected with one another from top to bottom in sequence, a steam generator connected with the steam heating device, and a raw water storage tank connected with the steam generator, wherein a hydrophilic catalyst is filled in the catalytic reaction section. The device disclosed by the invention is reasonable in structure, convenient and rapid in operation and high in tritiation removal efficiency, and can be used for transferring tritium into hydrogen from tritium-containing steam by virtue of a manner that the tritium-containing water and hydrogen flow reversely, thus realizing the tritiation removal of the tritium-containing water, and purifying the tritium-containing water; the device greatly reduces the energy consumption and cost, thus having very high application values.