226results about "Ether preparation from oxiranes" patented technology

The invention belongs to the technical field of water-based soldering flux manufacturing, and particularly relates to a water-based soldering flux for a photovoltaic N-type battery 0BB assembly and a preparation method of the water-based soldering flux. Deionized water, an alcohol solvent, a high-boiling-point solvent, organic acid, a fluoride-free surfactant, an antioxidant and a composite corrosion inhibitor are compounded to obtain the water-based soldering flux. Deionized water is used as a main solvent, and a high-boiling-point solvent is added, so that continuous wettability in the welding process is kept; the organic acid can remove metal surface oxides and reduce the surface tension of the solder; the fluoride-free surfactant has wettability and environmental friendliness, residues after welding are reduced, and the welding strength is improved; the composite corrosion inhibitor is compounded by the polysaccharide extract and the corrosion inhibition component, the metal oxidation process can be inhibited, the polysaccharide extract promotes formation of a protective film, and secondary oxidation in the welding process is prevented; the water-based soldering flux for the photovoltaic N-type battery 0BB assembly is applied to the 0BB assembly, and the welding strength and the alloying degree of a fine grid are improved.

The invention belongs to the technical field of oil exploitation chemicals, and particularly provides an amidated polymethyl hydrocarbon ether gas-soluble foaming agent and a preparation method thereof. According to the invention, the amidated polymethyl hydrocarbon ether surfactant is used as the amidated polymethyl hydrocarbon ether gas-soluble foaming agent, so that the cost is low, and the method is suitable for large-scale industrial application of tertiary oil recovery; excellent gas solubility and foam stability under high-temperature and high-salt conditions are realized; meanwhile, the polymer has good solubility in CO2, and the effect that the polymer is carried and transported to a reservoir is good.

The invention belongs to the technical field of polyether polyol preparation, and discloses a synthesis method of propylene glycol polyether. The synthesis method comprises the following steps: mixing propylene glycol, an organic boron catalyst and a cocatalyst, then introducing alkylene oxide at 10-80 DEG C for reaction, adding a solvent into a reaction system after the reaction is finished, and carrying out reduced pressure distillation, washing and drying to obtain propylene glycol polyether, the cocatalyst is selected from one or a combination of at least two of trimethylphosphine, triethylphosphine, triphenylphosphine, tris (dimethylamino) phosphine and tripyrrolidine phosphine. According to the invention, the organic boron catalyst and the cocatalyst phosphine salt are matched for use, and the cocatalyst is selected, so that the reaction can be carried out under a relatively wide temperature condition, and the propylene glycol polyether with controllable molecular weight and narrow distribution is prepared.

The invention belongs to the technical field of organic compounds, and discloses a preparation method of butynediol diethoxy ether and butynediol polyethoxy ether. The preparation method of the butynediol polyethyoxyl ether comprises the following steps: mixing 1, 4-butynediol and a basic catalyst, then adding first ethylene oxide to carry out a first polymerization reaction, and after the reaction is finished, carrying out post-treatment to prepare butynediol diethyoxyl ether; and mixing the butynediol diethoxy ether with second ethylene oxide and a phosphazene salt catalyst, and carrying out a second polymerization reaction to prepare the butynediol polyethoxy ether. The butynediol diethoxy ether prepared by the method is light in color and narrow in molecular weight distribution. The polyethyoxyl butynediol with light color, narrow molecular weight distribution, low peroxide value and small 1, 4-butynediol residual quantity can be prepared by using the polyethyoxyl butynediol as a catalyst of a second polymerization reaction and using phosphazene salt as a catalyst of the second polymerization reaction by using the polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol.

The invention discloses a preparation method of low-freezing-point dipropylene glycol, which comprises the following steps: carrying out condensation reaction on propylene oxide and propylene glycol by using a solid acid catalyst, and carrying out post-treatment to obtain the low-freezing-point dipropylene glycol. The sulfonic acid is loaded on the high-porosity inorganic nanoparticles, and the surface of the inorganic nanoparticles is modified with the crown ether in the form of a long cantilever, so that the preparation process of the dipropylene glycol is simplified, the dipropylene glycol with a low freezing point is obtained, the purity and the yield of the dipropylene glycol are improved, and the method is suitable for industrial production. And the solid acid catalyst still has good catalytic activity after being recycled for many times.

The invention belongs to the field of compound synthesis, and provides a synthesis method of a viloxazine hydrochloride product impurity. The synthesis method comprises the following steps: adding epichlorohydrin and organic alkali into 2-ethoxyphenol for preliminary reaction, adding an alkaline solution for further reaction, and purifying to obtain a compound 1; 2-ethoxyphenol and organic alkali are added into the obtained compound 1 for a reaction, and purification is performed to obtain the viloxazine hydrochloride product impurity. Compared with the prior art, the synthesis method of the viloxazine hydrochloride product impurity provided by the invention has the advantages that the synthesis method is novel, the raw materials are easy to obtain, the cost is low, the reaction conditions are mild, and the operation is convenient; and an impurity reference substance can be provided for quality detection of a viloxazine hydrochloride product.

The invention relates to a process for producing polyethylene glycol by coupling a reactive distillation separation ternary water-containing azeotropic system. According to the process, excessive ethylene oxide is introduced into a ternary water-containing azeotropic system, water in the system is completely converted into polyethylene glycol to be extracted as a by-product, and the excessive ethylene oxide and residual organic components of the system are separated through a common rectification technology. According to the invention, chemical reaction and rectification separation are coupled to be carried out in one tower, reaction and separation are realized at the same time, and heat released by the reaction can reduce the thermal load of the reboiler.

The invention discloses a preparation method of bis-hydroxyethyl bisphenol A ether, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: adding bisphenol A, a mixed acetate catalyst and a solvent into a reaction kettle, starting stirring, replacing nitrogen, heating to a reaction temperature, starting to introduce ethylene oxide, keeping the temperature after the ethylene oxide is added, and continuously reacting until the pressure is not reduced any more to obtain bisphenol A; cooling to a desolventizing temperature, desolventizing until no solvent is discharged, cooling, degassing, and discharging to obtain the bis (hydroxyethyl) bisphenol A ether, wherein the mixed acetate catalyst is prepared from calcium acetate, magnesium acetate and barium acetate; the solvent is methyl cyclohexane. According to the preparation method, the specific mixed acetate is adopted as the catalyst, methyl cyclohexane is adopted as the solvent, the excellent catalytic effect is achieved, the prepared bis-hydroxyethyl bisphenol A ether is high in content, low in hydroxyl value and light in color, and the solvent is small in toxicity and easy to recycle.

The invention discloses a method for treating a metal surface through ethylene glycol butyl ether after a fire disaster. The treatment method comprises the following steps that modified ethylene glycol butyl ether is prepared; sequentially adding modified ethylene glycol butyl ether serving as a main chemical solution into the reaction kettle according to the quantitative percentage, and carrying out mixed reaction; standing the mixed chemical solution in the step S2 for 10-20 minutes, and adding water to dilute the mixed solution according to the remaining percentage of the volume of the reaction kettle; the ethylene glycol butyl ether is modified and serves as a main component of the cleaning solution, the sodium phosphate, the epichlorohydrin, the sodium pyrophosphate and the trichloroethylene are mixed according to a proper proportion, a proper amount of water is added for dilution, and the cleaning solution is obtained. Dirt formed by fire disasters on the metal surface can be effectively removed, and metal objects cannot be damaged.

The present invention discloses a low-odor phosphazene catalyst and its use. The catalyst comprises a phosphazene cation represented by the general formula (I) and an alkali metal salt compound anion. The catalyst is prepared by dissolving a phosphorus pentahalide and a guanidine compound in a non-benzene-based organic solvent and reacting them under heated conditions to obtain an organic phosphonium salt solution containing the organic solvent and the phosphorus halide compound. An alkali metal salt compound is then added and reacted under heated conditions in an inert atmosphere to obtain a purified phosphazene catalyst through filtration, reduced-pressure distillation, purification, and vacuum drying. The catalyst can be used in the production of polyether polyols and polyurethane foams. The phosphazene catalyst of the present invention employs a non-benzene-based inert solvent that does not participate in the reaction during production, eliminating the need for frequent solvent changes. Using the same solvent eliminates steps such as extraction and distillation, reducing energy consumption and wastewater generation during the process. The continuous production method for the phosphazene catalyst is efficient and environmentally friendly.

The invention discloses a method for separating an azeotropic mixture of dimethyl carbonate and methanol, which comprises a reactive distillation tower, a second distillation tower and a third distillation tower, the reactive distillation tower is respectively provided with a dimethyl carbonate-methanol azeotrope feed port and an epoxypropane feed port below the dimethyl carbonate-methanol azeotrope feed port; a rectifying section of the reactive distillation tower is positioned between the dimethyl carbonate-methanol azeotrope feeding hole and the tower top, a reaction section of the reactive distillation tower is positioned between the dimethyl carbonate-methanol azeotrope feeding hole and the epoxypropane feeding hole, and a stripping section of the reactive distillation tower is positioned between the epoxypropane feeding hole and the tower bottom; the reaction section is filled with a quaternary ammonium salt catalyst; a dimethyl carbonate-methanol azeotrope with azeotropic concentration under high pressure is output from a tower top discharge end of the reactive distillation tower and is used as a feed of a second distillation tower; a mixture of dimethyl carbonate and propylene glycol monomethyl ether is output from a discharge end of the tower kettle and is used as a feed of a third rectifying tower; according to the method, the high-purity dimethyl carbonate product can be stably and continuously obtained, the consumption of heating steam is effectively reduced, particularly the energy consumption of the high-pressure tower is reduced, and the process cost is low.

A method of producing polyethylene glycol includes combining a tetra(ethylene glycol) initiator with one or more catalysts selected from the group consisting of MOH and MH, where M is selected from the group consisting of alkali metals and alkaline earth metals, to form a reaction mixture, wherein the reaction mixture further contains 1200 ppm or less of water as measured by Karl Fischer titration; adding ethylene oxide to the reaction mixture; and reacting the reaction mixture to form polyethylene glycol having a weight average molecular weight of 200 g / mol to 1000 g / mol as measured by gas chromatography with mass spectrometry detection.

A system and method for producing ethylene glycol are disclosed. An alkylene oxide and water are fed into a first reactor unit, and the alkylene oxide and water are subjected to first reaction conditions in the first reactor unit such that the effluent from the first reactor unit contains an alkylene glycol, unreacted alkylene oxide, and unreacted water. At least a portion of the unreacted alkylene oxide can be routed to a second reaction unit and subjected to reaction conditions sufficient to produce further alkylene glycols.

The present invention provides a method for producing a bio-derived branched alkyl glyceryl ether, the method comprising: a step for producing a bio-derived branched primary alcohol having a branched alkyl group having 6 to 12 carbon atoms, the step including dimerizing at least one component selected from the group consisting of a bio-derived linear primary alcohol having a linear alkyl group having 3 to 6 carbon atoms, a bio-derived linear primary alcohol having a linear alkenyl group having 3 to 6 carbon atoms, a bio-derived linear aldehyde having a linear alkyl group having 3 to 6 carbon atoms, and a bio-derived linear aldehyde having a linear alkenyl group having 3 to 6 carbon atoms; and a step for producing a bio-derived branched alkyl glyceryl ether using the bio-derived branched primary alcohol. The present invention also provides a bio-derived branched alkyl glyceryl ether produced by the method.

To provide an aliphatic alcohol alkylene oxide adduct in which the content of dioxane is reduced.SOLUTION: A method for producing an aliphatic alcohol alkylene oxide adduct comprises step A of adding a first alkylene oxide to an aliphatic alcohol in the presence of a perchlorate, wherein, the step A is followed by step B and step C, where the step B is a step of removing perchlorate used in the step A, and the step C is a step of removing dioxane generated in the step A.SELECTED DRAWING: None

The application belongs to the technical field of solid phase catalysis, and discloses application of a porous polymer catalyst in catalyzing an epoxy ring-opening reaction. The porous polymer catalyst is prepared by the following method: (1) trihelium is dissolved in a solvent together with a Lewis acid, and through reaction I, washing, refluxing, filtering and drying, a hypercrosslinked self-porous polymer is obtained; (2) the hypercrosslinked self-porous polymer obtained in step (1) is dispersed in concentrated sulfuric acid, and through reaction II, a sulfonated multifunctional hypercrosslinked self-porous polymer, i.e. the porous polymer catalyst, is obtained. The polymer catalyst provided by the application is rich in porous structure, can efficiently catalyze the synthesis of an epoxy ring-opening reaction under simple catalytic conditions, and can realize a conversion rate close to 100% under a small amount of catalyst, a short reaction time and a low temperature, and has high industrial application value.

The application relates to the technical field of surfactants, in particular to a pentadecyl phenol alkoxyl ether sodium sulfate surfactant and a preparation method thereof. The preparation method of the pentadecyl phenol alkoxyl ether sodium sulfate surfactant comprises the following steps: after pretreatment, cashew nut shell liquid is selectively hydrogenated to obtain pentadecyl phenol with a specific composition; then, alkoxylization reaction is carried out under the condition of an alkaline catalyst to obtain pentadecyl phenol polyalkoxyl ether; and the pentadecyl phenol polyalkoxyl ether is sulfated and neutralized to obtain the pentadecyl phenol alkoxyl ether sodium sulfate surfactant. The surfactant improves the problem that the activity of the surfactant is reduced when the saturation of the pentadecyl phenol is too high or too low; ensures that the final product has good fluidity at low temperature, guarantees the continuity of production, effectively reduces the occurrence of over-sulfation; and simultaneously improves the production efficiency and reduces the cost.

The disclosure relates to the field of specialty chemicals. In particular, the disclosure provides novel 1,3-fatty-diol compounds and derivatives thereof which are useful e.g., in the production of personal care products, surfactants, detergents, polymers, paints, coatings, and as emulsifiers, emollients, and thickeners in cosmetics and foods, as industrial solvents and plasticizers, etc.

A process for preparing alkoxylated ether amines, comprising: carrying out an alkoxylation reaction between a Guerbet alcohol and an epoxide in the presence of a catalyst to obtain an alkoxylated alcohol, which is then subjected to an amination reaction in the presence of ammonia and hydrogen to form an alkoxylated Guerbet amine.

The invention belongs to the field of fluorine chemical industry, and particularly relates to a preparation method of a hexafluoropropylene oxide oligomer, which comprises the following steps: adding a solvent and a catalyst into a stirring reactor with a proper length-diameter ratio, and introducing hexafluoropropylene oxide in a stirring state; a valve is arranged at the bottom of the stirring reactor, and when the fluorine phase liquid level at the bottom of the stirring reactor is increased to a certain height, the bottom valve is opened; controlling the bottom liquid outlet rate to keep the height of the reaction liquid stable; and after the reaction is finished, collecting a component flowing out of a valve at the bottom, namely the hexafluoropropylene oxide oligomer. The method has the beneficial effects that the operation is simple, the product is easy to separate from the solvent and the catalyst, and large-scale production is easy.

The invention relates to a process for preparing an alkoxylated product. The aim of the invention is to provide aromatic polyols for preparing polyurethane-based and polyisocyanurate-based polymers, which ensure good miscibility with the isocyanate component and other components, have a good storage stability and render the end product flameproof. For this purpose, the invention devises a process for preparing an alkoxylated product by reacting bisphenol F with propylene carbonate and / or propylene oxide as propoxylation agent and ethylene carbonate and / or ethylene oxide as ethoxylation agent, the propoxylation agent and the ethoxylation agent being used in a molar ration of 70:30 to 45:55.

The invention relates to the technical field of organic synthesis, and particularly discloses a method for preparing 2-chloroethoxyethanol through combined catalysis, which comprises the following steps: under the catalysis of a main catalyst and an auxiliary catalyst, carrying out alkylation reaction on 2-chloroethanol and ethylene oxide, after the alkylation reaction is finished, heating and desolventizing an alkylation reaction solution to obtain a concentrated solution, and recovering 2-chloroethanol; and distilling the concentrated solution to obtain the target product 2-chloroethoxyethanol. The main catalyst and the auxiliary catalyst are adopted for combined catalysis, the adding amount of boron trifluoride diethyl etherate is greatly reduced, the output of three wastes is reduced, the catalytic reaction rate is controllable, side reactions are few, and the product purity is high.

The application relates to the technical field of polyols, and particularly discloses a high-functionality plant phenol-based polyether polyol, a preparation method thereof and a polyurethane adhesive. The high-functionality plant phenol-based polyether polyol is prepared from plant phenol glycidyl ether and a dihydroxyl compound with a molar ratio of 1:(1.8-2.2). The preparation method comprises the following steps: obtaining a polyol intermediate by reacting the plant phenol glycidyl ether and the dihydroxyl compound under the action of a first catalyst, and then obtaining the product by reacting the polyol intermediate under the action of a second catalyst. The high-functionality plant phenol-based polyether polyol has multiple high-reactivity hydroxyl groups, significantly improves the hydroxyl content and the reactivity of a plant phenol-based high-molecular material, and widens the application range.

The present invention provides a method for synthesizing tyloxapol of formula (I), including the following steps: first reacting p-tert-octylphenol of formula (III) with formaldehyde under alkaline conditions to obtain 2,5-dimethylol p-tert-octylphenol of formula (IV); then reacting 2,5-dimethylol p-tert-octylphenol with p-tert-octylphenol of formula (III) under acidic conditions to obtain the phenolic resin of formula (II); and finally, reacting the phenolic resin of formula (II) with ethylene oxide to obtain tyloxapol of formula (I).

The present invention relates to the technical field of fine chemical synthesis. Disclosed is a method for synthesizing bisphenol A polyether. In the synthesis method, bisphenol A is used as an initiator, and a composite catalyst consisting of a carbonate, an amine compound, and an organic phosphine is used to catalyze a ring-opening polymerization reaction of an alkylene oxide, thereby obtaining a bisphenol A polyether having a low hydroxyl value and a light color. The problems in the prior art that a product is prone to isomerization and decomposition under the action of a strong base catalyst, and that the color of the product darkens are effectively solved.

The invention belongs to the technical field of organic synthesis, and particularly relates to a production and preparation method of 2-chloroethoxyethanol. In the reaction process, chloroethanol is precooled to 0 DEG C, the temperature in the reaction kettle is controlled to be 3-8 DEG C, ethylene oxide is introduced in three stages, the pressure is kept to be 0.3-0.6 MPa, the temperature is low, and ethylene oxide is introduced in stages, so that the local concentration of ethylene oxide can be prevented from being too high, side reactions are reduced, and the reaction selectivity is improved. The used composite catalyst has sufficient active sites and is beneficial to diffusion of reactants and products, the supported phosphotungstic acid is used as a strong acid catalyst and can effectively activate epoxy bonds of ethylene oxide and promote nucleophilic addition reaction of ethylene oxide and chloroethanol, and the supported metal elements are capable of effectively activating the epoxy bonds of ethylene oxide and promoting the nucleophilic addition reaction of ethylene oxide and chloroethanol by adjusting the electronic properties of the catalyst. The catalytic activity and selectivity are improved, and the reaction is promoted together with phosphotungstic acid.

The application relates to a method for co-producing propylene glycol / dipropylene glycol / polyether 202 and a polyether preparation method, wherein the method for co-producing propylene glycol / dipropylene glycol / polyether 202 comprises the following steps: mixing water and propylene oxide to carry out a hydration reaction to obtain a reaction liquid; the temperature of the hydration reaction is 160 DEG C-240 DEG C, the pressure is 10 MPa-25 MPa, and the molar ratio of water to propylene oxide is (0.08-0.6):1; the reaction liquid is subjected to rectification to obtain propylene glycol, dipropylene glycol and polyether 202 respectively. KOH or NaOH is not needed to be used as a catalyst, that is, neutralization and filtration steps are not needed to be carried out, waste water and filter residue generated due to the neutralization and filtration steps can be effectively avoided, and the risk that polyether 202 contains potassium ions, sodium ions or has an acid value exceeding a standard can be effectively avoided. The polyether 202 obtained by the method has a low acid value, low contents of potassium ions and sodium ions, and can be directly used as a starting agent for preparing polyether; and the obtained propylene glycol and dipropylene glycol have high purity.

The invention relates to the technical field of propylene glycol ether synthesis, in particular to a production system and a production method of propylene glycol butyl ether and dipropylene glycol butyl ether, and the production method comprises the following steps: mixing n-butyl alcohol, potassium butoxide, a catalyst and a first part of epoxypropane, and preheating to obtain a mixture; dividing the second part of epoxypropane into a plurality of batches; carrying out heat exchange on the mixture to a reaction temperature, and reacting the mixture with a first batch of a second part of epoxypropane in a first reactor; after the reacted mixture is subjected to heat exchange and constant temperature to the reaction temperature, the mixture is mixed with the next batch and enters the next reactor to react; the steps are repeated in sequence until the materials react with the last batch, then the materials are rectified, and n-butyl alcohol, propylene glycol butyl ether, dipropylene glycol butyl ether and tripropylene glycol butyl ether are obtained respectively. According to the present invention, the reaction temperature is reduced through the common use of a variety of catalysts, and the reaction heat is timely removed through the manner of adding the raw materials in the reactor in the segmented manner so as to achieve the high selectivity production of propylene glycol butyl ether.

The present invention provides an ethylene glycol production process for increasing the production of diethylene glycol and triethylene glycol, which includes an ethylene glycol process module, a diethylene glycol refining unit, and a triethylene glycol refining unit; the ethylene glycol process module, the diethylene glycol refining unit, and the triethylene glycol refining unit are sequentially connected through material pipelines. The ethylene glycol process module further includes an ethylene glycol feed stripping unit and an ethylene glycol dehydration unit, and the ethylene glycol dehydration unit is located downstream of the ethylene glycol feed stripping unit. A pipeline is additionally provided and connected between the outlets at three positions, namely the reflux pump of the ethylene glycol refining column, the side stream extraction of the ethylene glycol refining column, and the side stream extraction of the diethylene glycol refining column, and the ethylene glycol feed stripping unit. By reforming the ethylene glycol production system device, the present invention realizes the adjustment of the output of ethylene glycol and the conversion to diethylene glycol products and triethylene glycol products, so as to solve the problem that the yields of diethylene glycol products and triethylene glycol products in the existing ethylene glycol production process are limited by the hydration ratio and cannot be further increased.