69results about How to "The reaction conditions are easy to achieve" patented technology

The invention discloses a method for preparing cyclopentene/cyclohexene-1-boronic acid pinacol ester. The method comprises the step of carrying out coupling reaction on 1-chlorine-cyclopentene/cyclohexene serving as a raw material in an organic solvent A in the presence of monophosphate ligand and a palladium catalyst based on potassium acetate as alkali so as to prepare the cyclopentene/cyclohexene-1-boronic acid pinacol ester. The method is characterized in that the physicochemical reaction at the n-butyllithium and ultralow temperature condition in the literature is avoided, and the palladium catalyst is adopted for catalyzing, so that the amount of the used catalyst is reduced, and the cyclopentene/cyclohexene-1-boronic acid pinacol ester can be prepared in relatively high yield at the acceptable temperature; the boronizing agent n-butyllithium/isopropoxy boronic acid pinacol ester system is replaced by the boronizing agent palladium catalyst/bis(pinacolato)diboron system, and therefore, the cost of the raw materials is greatly reduced, the reaction condition is relatively easy to realize, amplification is easy, and the technical operation is simpler and more convenient.

A process for synthesizing (S)-isopropyl-(2-pipeeridine) phenyl-methylamine nicludes reaction between trimethylallyl boronane and tartaric acid derivative, asymmetric allylation reaction on o-chlorobenzaldehyde, halogenation, reacting on azo compound, catalytic reduction reaction and coupling with piperidine.

The invention discloses a low-density polyethylene (LDPE) resin for a cable insulant having a voltage level of above 110kV, and a preparation method thereof, and belongs to the field of LDPE resins. The LDPE resin is the characterized in that a melt flow rate is in a range of 0.1 to 10g/10min; density is in a range of 0.910 to 0.940kg/cm<3>; a degree of crystallization is in a range of 30 to 60%; molecular weight distribution Mw/Mn determined by a gel permeation chromatography is in a range of 2 to 7; fracture elongation is above 500%; a dielectric constant is below 4; a dielectric loss factor is below 6*10<-4>; volume resistivity is above 1.0*10<15>Omega.cm; and a maximum impurity size representing cleanliness is below 0.5mm. The preparation method of the LDPE resin comprises the following steps that 1, raw materials and a conditioning agent are subjected to compression boosting; 2, an initiator-peroxide solution is injected into the mixture obtained by the step 1 and undergoes a polymerization reaction; and 3, the polymerization system obtained by the step 2 is controlled and adjusted. The LDPE resin has specific performances, stable processing performances and physicochemical performances, and high cleanliness, and thus satisfying ultrahigh voltage cable insulation layer production requirements. The preparation method has relatively simple processes and adopts LDPE production equipment. Reaction conditions needed by the preparation method are easy to be satisfied.

An aminophosphonic acid compound used for nuclear medicine is prepared through adding amine and phosphoruc acid to reactor, dropping concentrated acid and formaldehyde, reaction, cooling, and precipitation in water or absolute alcohol. It along with Tc, Re, Or Sm can be used to prepare medicine for treating cancers.

The invention relates to a copper molybdate adsorbing material. The content of CuO is 61-64wt%, the content of MoO3 is 22-25wst%, and the average particle diameter of copper molybdate particles is 300-350nm. A preparation method comprises the following steps: mixing copper sulfate and deionized water, and then quickly vibrating the mixture for a period of time in a vibrator to obtain a primary solution; mixing potassium molybdate and the deionized water, and then quickly vibrating the mixture for a period of time in the vibrator to obtain a secondary solution; mixing the primary solution and the secondary solution, and then quickly vibrating the mixture for a period of time in the vibrator to obtain a mixed solution; aging, filtering and washing the mixed solution, and then performing drying for a period of time to obtain a primary solid product; and roasting the primary solid product in a roasting furnace to obtain the copper molybdate adsorbing material. The copper molybdate adsorbing material provided by the invention has small copper molybdate impurity content, high purity and good particle size uniformity and has good adsorption capacity to xanthate.

The invention discloses a preparation method of nanometer ZnO for a lithium ion battery cathode material. The concrete preparation method comprises the steps of placing zinc acetate in a muffle furnace with a temperature raising procedure; starting the muffle furnace; raising the room temperature to be the preset temperature ranged from 500 to 800 DEG C, wherein the temperature raising speed is ranged from 3 to 5 DEG C/min; keeping warm at the preset temperature ranged from 500 to 800 DEG C for 2 to 10 hours; then taking out; cooling to the room temperature; and obtaining the nanometer ZnO for the lithium ion battery cathode material. The prepared ZnO has excellent electrochemical cycling stability, the preparation method of the nanometer ZnO for the lithium ion battery cathode material is simple, the reaction conditions can be easily reached, and the nanometer ZnO is suitable to be prepared on a large scale.

The invention discloses a method for preparing a sofosbuvir intermediate by using a microfluid reaction device. The method comprises the following steps: pumping phenyl dichlorophosphate and pentafluorophenol into a first micro-channel reactor, carrying out a first-step acylation reaction, pumping the product obtained in the first step and L-alanine isopropyl hydrochloride into a second micro-channel reactor, carrying out a second-step substitution reaction to prepare a racemic sofosbuvir intermediate mixture, enabling the product to directly enter a micro-flow extraction device, and finally re-crystallizing to obtain a single-configuration target compound. Compared with the method in the prior art, the method disclosed by the invention has the advantages that the integration of efficientreaction and separation can be realized, the operation is simple, the problems caused by intermittent operation of extraction after product collecting are avoided, the reaction steps are few, the yield of the final product is high, the energy consumption is low, and the continuous large-scale production operation can be realized.

The invention relates to a copper tungstate material for adsorption. The content of CuO is 52-61 wt%, the content of WO2 is 25-30 wt%, and the average particle size of copper tungstate particles is 0.4-0.6 mum. The method includes mixing copper sulfate with deionized water and performing ultrasonic treatment for a certain period of time to obtain a primary solution; mixing sodium tungstate and deionized water and performing ultrasonic treatment for a certain period of time to obtain a secondary solution; mixing the primary solution and the secondary solution, and performing ultrasonic treatment for a certain period of time to obtain a mixture solution; ageing the mixture solution; filtering the aged mixture solution, washing an obtained product, and drying the product for a certain periodof time to obtain a primary solid product; and calcinating the primary solid product in a calcinatory to obtain the copper tungstate material for adsorption. The copper tungstate material for adsorption is low in impurity contents, high in purity, good in particle size uniformity, and has good xanthate absorbing capability.

The invention relates to a modification method of macroporous resin for adsorbing low-concentration sulfur dioxide in air. The method comprises the steps that macroporous polystyrene resin is sufficiently swelled in a three-necked flask by using dichloroethane; a methylal solution is added to an another three-necked flask, then a thionyl chloride solution is dropwise added to the flask, chloromethyl ether is generated after the solution reacts, and the mixed solution after the reaction is completely poured into the three-necked flask filled with resin; anhydrous zinc chloride powder is added to the three-necked flask filled with resin and used as a catalyst, a sufficient reaction is conducted, then cooling, filtration and extraction are conducted, and chloromethylation resin is obtained; then the chloromethylation resin is added to an organic solvent and binary organic tertiary amine, a sufficient reaction is conducted under a stirring state, cooling and filtration are conducted, and finally acetone is used for extraction to obtain the required amination resin. According to the modification method, an indirect chloromethylation reaction is adopted, the risk of touching chloromethylmethyl ether by operation personnel is greatly lowered, and the chloromethylation effect on the resin is stable. An amination reagent is organic tertiary amine which can react with sulfur dioxide molecules more sufficiently, and the capacity of adsorbing low-concentration sulfur dioxide by the resin is greatly improved.

The invention discloses a preparation method of an epoxy resin wear-resistant composite material, wherein the preparation method comprises the following steps: (1) raw material pretreatment: a, respectively carrying out clear water cleaning and acetone solution ultrasonic cleaning on SiC particles, and finally drying; b, drying a stirrer and a mold, so as to prevent water from being brought in; (2) stirring and mixing: uniformly stirring E44 type epoxy resin and E51 type epoxy resin, adding a toughening agent, a coupling agent and an organic silicon oil defoaming agent, and adding the pretreated SiC particles while stirring; and (3) curing molding: adding a curing agent and a curing accelerator while stirring, injecting into a mold coated with a release agent, curing at normal temperature,curing in an oven, and curing at room temperature to finally obtain the finished product. The preparation operation is simple, the materials are easy to obtain, the reaction conditions are easy to achieve, and the prepared epoxy resin wear-resistant composite material has excellent erosive wear resistance, corrosion resistance and good tensile strength.

The invention discloses a nickel-containing electroplating wastewater treatment method which comprises the following steps: putting nickel-containing electroplating wastewater into a stirring tank, and stirring with an electric stirring machine; putting a precipitator into the stirring tank; further putting a settling agent into the stirring tank; further putting a composite water purifier into the stirring tank, and increasing a stirring speed for a certain time; further putting a polymeric flocculant into the stirring tank, and reducing the stirring speed for a certain time; introducing obtained wastewater into the settling tank, and performing precipitation so as to obtain precipitated sludge; filtering and drying the precipitated sludge; dissolving the dried sludge into dilute sulfuric acid so as to obtain a primary solution; extracting the primary solution so as to obtain an extract; performing reverse extraction on the extract so as to obtain a reverse extract; electrolyzing the reverse extract, thereby obtaining metal nickel. The method is environmentally friendly in process procedure, low in energy consumption, high in heavy metal recycling rate, low in overall production cost and easy in industrial on-scale production.

The invention discloses a method for preparing 2-oxo-2-furyl acetic acid by using a continuous flow micro-channel reactor. The method specifically comprises the following steps: respectively pumping anitric acid solution of 2-acetylfuran treated at low temperature and a mixed solution of sodium nitrite and methylbenzenesulfonic acid into a mixed type continuous flow micro-channel reactor by usinga metering pump for reaction, and finally extracting and recrystallizing an obtained reaction solution to obtain a finished product. Compared with the prior art, the method disclosed by the inventionpossesses following advantages: operation is simple, reaction steps are few, methylbenzenesulfonic acid is used as the catalyst, the yield of the finished product is high, no three-waste pollution isgenerated, and continuous large-scale production operation can be realized.

The invention discloses a synthesis method of an AgIn5S8/SnS2 type visible-light-induced photocatalyst with an adsorption-photocatalysis synergistic effect, wherein the method comprises the followingsteps: (1) dispersing a certain amount of an inorganic tin source, an inorganic indium source and an inorganic silver source as raw materials into deionized water under continuous stirring, and stirring at room temperature for 30 min; (2) slowly adding thioacetamide and citric acid into the mixed solution in sequence, and magnetically stirring for 2 h at room temperature; and (3) transferring thefully reacted solution into a reaction kettle, carrying out a hydrothermal reaction for 12 h at the temperature of 150 DEG C, naturally cooling to room temperature, carrying out vacuum filtration through a filter membrane, washing for multiple times by deionized water and absolute ethyl alcohol, and drying for 24 h at the temperature of 60 DEG C. The solid solution catalyst provided by the invention can effectively realize efficient separation, transfer and migration of photo-induced electron-hole pairs, and has relatively good stability and relatively strong visible light absorption; the adsorption effect is good, and a remarkable effect on degradation of pollutants is achieved.

The invention relates to a preparation method of a MnO2 nanowire. The preparation method includes the steps: taking KMnO4, concentrated sulfuric acid and home-made polypyrrole as raw materials; synthesizing the MnO2 nanowire at low temperature (85 DEG C) and in a short time (1h). According to the preparation method, synthesis cost can be effectively reduced, and the MnO2 nanowire is synthesized without high temperature and high pressure. The prepared MnO2 nanowire serving as an active material is applied to flexible carbon cloth to prepare an electrode, test is performed in 1mol/L of Na2SO4 electrolyte by three electrodes, specific capacitance reaches up to 85Fg<-1> when current density is 1Ag<-1>, and the MnO2 nanowire has excellent conductivity and cycling stability (capacitance retention rate is 98.6% in a thousand times of cycling when the current density is 5Ag<-1>).

The invention discloses a precipitating treatment method of nickel-containing electroplating waste water. The precipitating treatment method comprises the following steps: putting the nickel-containing electroplating waste water into a stirring pool, stirring by using an electric stirring machine, and adjusting pH value of the waste water; adding ferric salt into the stirring pool, then adjusting pH value of the waste water; heating the waste water in the stirring pool, and stirring for a period of time; then introducing the waste water into a precipitating pool for precipitation to obtain precipitated sludge; filtering and drying the precipitated sludge; dissolving dried products in dilute sulfuric acid to obtain primary solution; extracting the primary solution to obtain extraction liquid; carrying out reverse extraction on the extraction liquid to obtain reverse extraction liquid; and electrolyzing the reverse extraction liquid to obtain metal nickel. The precipitating treatment method disclosed by the invention has the advantages that the process flow is environmentally friendly, the energy consumption is low, the recovery for heavy metals is high, the whole production cost is low and the industrial large-scale production can be easily realized.

The invention relates to a method of preparing ceramic granules with solid wastes, which includes: 1) drying dehydrated municipal sludge by blowing air and finely grinding the municipal sludge to obtain sludge powder; 2) mixing the sludge powder, clay and steel slag to obtain a primary mixture; 3) adding water to the primary mixture and adding lime powder, and compressing the mixture into pellets;3) drying and roasting the pellets and cooling the pellets in a natural cooling manner to produce the ceramic granules. By using the dehydrated municipal sludge and other wastes for preparing the ceramic granules, recycling utilization of the solid wastes is achieved. The method also avoids environmental pollution due to the solid wastes, is simple in process and is low in investment cost.

The invention discloses a preparation method of an efficient anti-sticking kettle coating agent for polyvinyl chloride suspension polymerization, and relates to the technical field of anti-sticking kettle agents. The preparation method comprises the steps of adding 1-naphthol, water and a sodium hydroxide aqueous solution into a reactor, starting stirring, and replacing air in the reactor; heating the reactor, mixing part or all of the sodium formaldehyde sulfoxylate and the formaldehyde aqueous solution, dropwise adding the mixture into the reactor, and stirring for reaction; cooling, adding water, a benzenesulfonic acid aqueous solution, a polyvinyl alcohol aqueous solution and the balance of sodium formaldehyde sulfoxylate, adjusting the solid content, and stirring to obtain a light yellow phenolic resin aqueous solution product; and standing the obtained product to obtain a light yellow clear anti-sticking kettle coating agent product. The preparation method is simple and easy to operate, the anti-sticking effect is good, the product is a light yellow clear transparent solution, the quality of the resin product is improved, and the storage and use stability of the product is enhanced.

The invention relates to a basic cupric carbonate adsorption material. The basic cupric carbonate adsorption material comprises 45 to 49 weight percent of CuO and 24 to 35 weight percent of C, whereinthe average particle size of basic cupric carbonate particles is 60 to 110 nm. A preparation method comprises the following steps: mixing copper sulphate and deionized water to prepare a primary solution, and heating for a period of time; mixing potassium carbonate and deionized water to prepare a secondary solution, and heating the secondary solution in a water-bath device; adding the primary solution into the secondary solution, and stirring; adding sodium hydroxide to regulate a pH value, then continuing stirring for a period of time, and then cooling; aging the cooled solution, then filtering and washing; drying the washed product to obtain the basic cupric carbonate adsorption material. The basic cupric carbonate provided by the invention is low in impurity content, high in purity and high in particle size uniformity, and has very good adsorption capacity to xanthate.

The invention discloses a method for hydrothermally preparing an adsorption material for a heavy metal in wastewater. The method comprises the following steps of mixing and dissolving potassium metaaluminate and potassium hydroxide in water, then adding silica sol, agitating for a period of time, and then obtaining primary mixed liquor; putting the primary mixed liquor into a stainless steel reaction kettle, and reacting for a period of time at a certain temperature; filtering, washing and oven-drying a product after the reaction is finished, so as to obtain a primary solid; adding the primary solid into a solution containing ammonium chloride, and agitating the solution in a heating condition; filtering the agitated solution, so as to obtain a final solid; cooling the final solid; drying the cooled final solid; grinding the dried final solid, and then obtaining a zeolite adsorption material. The method is simple in preparation process and is green and environment-friendly; the reaction condition is easily reached; the energy consumption is low and the zeolite adsorption material is high in purity and good in adsorption effect.

The invention relates to a heavy metal-containing wastewater treatment system. The heavy metal-containing wastewater treatment system comprises a stirring tank, a precipitation tank, a press filteringdevice, a clean water tank, a dissolving device, an extraction and reverse extraction device, an electrolysis device, and a metal storage chamber; the wastewater is firstly sent into the stirring tank, then sent into the precipitation tank, pressed and filtered by the press filtering device, and finally sent into the clean water tank; the obtained sludge after press filtering is sequentially sentinto the dissolving device, the extraction and reverse extraction device and the electrolysis device to be electrolyzed; the obtained metal is stored into the metal storage chamber. The heavy metal-containing wastewater treatment system has the advantages that the input and output ratio is good, the green and environment-friendly effects are realized, the energy consumption is little, and the industrialized scaled production is easily realized.