147results 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 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 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.

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.

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 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 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 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.

A process for preparing alkoxylated ether amines including performing an alkoxylation reaction between a Guerbet alcohol and an epoxide in the presence of a catalyst to obtain an alkoxylated alcohol. Performing an amination reaction on the alkoxylated alcohol in the presence of ammonia and hydrogen to form an alkoxylated Guerbet amine.

The embodiment of the invention discloses a preparation method of 2, 2 '-di-(2-hydroxyethoxy)-1, 1'-dinaphthalene, which comprises the following step: (+ / -)-1, 1 '-di-(2-naphthol) shown in a formula I and ethylene carbonate react in the presence of a catalyst, a solvent and a preset temperature to obtain a 2, 2'-di-(2-hydroxyethoxy)-1, 1 '-dinaphthalene product shown in a formula II. According to the preparation method of 2, 2 '-di-(2-hydroxyethoxy)-1, 1'-dinaphthalene, (+ / -)-1, 1 '-di-(2-naphthol) is taken as a starting raw material, a high-yield target product is obtained through alkylation reaction, the raw material is convenient and easy to obtain, the reaction route is short, the reaction condition is mild, and a high-purity product can be obtained through simple purification.

The present invention relates to a process for preparing one or more ethers, the process comprising (i) preparing a feed stream comprising an alcohol, an epoxide, and a catalyst; (ii) feeding the feed stream prepared in (i) into a reactor, and subjecting the feed stream to reaction conditions, obtaining a product stream comprising the one or more ethers; (iii) feeding the product stream obtained from (ii) into a first fractionating column, and separating the product stream into a first overhead stream and a first bottoms stream; (iv) preparing a first H2O-containing stream; (v) transferring heat from the first overhead stream obtained from (iii) to the first H2O-containing stream prepared in (iv), obtaining a heated first H2O-containing stream and a liquid first over-head stream. It has been surprisingly found that by integrating an open loop heat pump in the process for preparing one or more ethers, a portion of the heat can be recovered by heat transfer to an H2O-containing stream.

The invention discloses a method for preparing vinyl alkyl ether from ethylene oxide through ethylene glycol monoalkyl ether. The ethylene glycol monoalkyl ether prepared through ring opening etherification of ethylene oxide and alcohol is further subjected to a gas-phase dehydration reaction, and a reaction product is subjected to fractional refining to obtain the vinyl alkyl ether. According to the method, bulk chemicals ethylene oxide and alcohol are used as raw materials, two-step reaction of novel solid acid catalytic addition etherification and novel solid base catalytic dehydration is adopted, ethylene glycol monoalkyl ether and vinyl alkyl ether compounds with high additional value are prepared, the raw materials are low in price and easy to obtain, the product yield is high, the production cost is low, the application range is wide, and the development potential is large; a catalytic reaction process and a grading refining process are adopted, the process is efficient, safe and environment-friendly, and the device can be large-scale; the product scheme is flexible, and a series of ethylene glycol monoalkyl ether and vinyl alkyl ether products can be produced by switching the raw material alcohol.

The invention relates to the technical field of surfactants, and discloses a double-hydrophilic-group nonionic surfactant and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing isooctanol with a basic catalyst, dehydrating, and heating; and (2) sequentially adding epoxypropane, glycidol and ethylene oxide, and carrying out aging treatment. The double-hydrophilic-group nonionic surfactant prepared through addition reaction of isooctanol, epoxypropane, glycidol and ethylene oxide has excellent hydrophilicity and lipophilicity balance, can efficiently permeate and emulsify sebum in the leather treatment process, remarkably improves the degreasing efficiency, is mild in effect on a leather fiber structure, and has the advantages that the degreasing efficiency is improved, and the degreasing effect is good. The leather degreasing agent shows excellent and stable leather degreasing performance.

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 belongs to the field of fine chemical technology, discloses a kind of preparation method of allyl glycidyl ether.The preparation method is:Using allyl alcohol and epichlorohydrin as reaction raw materials, ring-opening reaction is carried out under the effect of strongly acidic cation exchange resin, after reaction terminates, filtrate is filtered to obtain;Then filtrate is mixed with strong base, ring-closed reaction is carried out under the effect of phase-transfer catalyst, after reaction terminates, through refinement, allyl glycidyl ether is obtained;The mol ratio of allyl alcohol and epichlorohydrin is 1:(0.95 1.2).The present invention uses open loop, closed loop two-step method to synthesize allyl glycidyl ether, using strongly acidic cation exchange resin as the catalyst of ring-opening reaction, it is possible to prepare the allyl glycidyl ether of high content, high yield without adding excessive allyl alcohol.

The invention relates to a co-production method of 1, 1 '-oxydi-2-propanol and tripropylene glycol, which comprises the following steps: by taking propylene oxide and propylene glycol as raw materials, carrying out catalytic reaction under the action of a solid base catalyst, and separating and purifying after the reaction to respectively obtain the 1, 1'-oxydi-2-propanol and tripropylene glycol. The technology is flexible, intermittent production can be achieved, continuous operation can also be achieved, and adaptability is high; the content of the product 1, 1 '-oxydi-2-propanol is high, and the subsequent separation and purification process is greatly simplified; after the reaction, the catalyst can be repeatedly used through simple filtration or direct regeneration, no alkali-containing wastewater is generated in the process flow, and the environmental burden is greatly reduced; the obtained single isomer is used as a raw material of polymers such as polyurethane, and can provide highly consistent reaction activity and polymerization kinetics, so that the molecular structure of the polymer is accurately regulated and controlled, the final product is endowed with more excellent and stable mechanical properties, thermal properties and hydrolytic stability, and the application requirements in the high-end field are met.

The application discloses a preparation method of low-chlorine high-purity bisphenol A type liquid epoxy resin. The method comprises the following steps: mixing raw materials containing epichlorohydrin, bisphenol A and a cosolvent, adding a catalyst A, and performing etherification reaction under low-temperature condition of not more than 50 DEG C; recovering unreacted epichlorohydrin in the system after the reaction is completed to obtain an etherification product; mixing the etherification product with a solvent, adding a catalyst B, and performing ring-closing reaction under low-temperature condition of not more than 50 DEG C; performing extraction separation on the obtained reaction product to obtain an organic phase; and performing desolventizing treatment on the organic phase to obtain the bisphenol A type liquid epoxy resin product. The total chlorine content of the obtained bisphenol A type liquid epoxy resin product is low, the viscosity is low, the purity is high, the quality is good, the preparation method is simple, the process flow is short, and the cost is low.

Epoxy propane and propylene glycol are used as raw materials, an acid or alkaline substance is used as a catalyst, condensation reaction is performed to obtain DPG, a kettle type reactor and a tubular reactor are generally adopted, a large amount of heat is released in the reaction, so that an external heat exchanger is needed to remove heat, and the generated DPG is mixed back into the reactor in the material circulation process, so that the DPG is generated. The utility model relates to a dipropylene glycol reaction device, which aims to solve the technical problems of low DPG conversion rate, more by-product tripropylene glycol and the like of the existing dipropylene glycol reaction device, and the technical problem that the existing dipropylene glycol reaction device is low in price due to the fact that the byproduct tripropylene glycol accounts for about 15%-25% of the DPG, and the economical efficiency of the device is poor due to the small market price of the tripropylene glycol. The reaction device which is simple and convenient to operate and capable of reducing DPG backmixing is provided, and the by-product tripropylene glycol is reduced by 50% or above.

The invention relates to the technical field of bimetallic catalysts, in particular to a bimetallic catalyst for catalyzing epoxide, which is prepared from the following raw materials: activated carbon, titanium tetrachloride, cobalt nitrate, cerium nitrate, glacial acetic acid and deionized water. The composite material comprises the following components in parts by weight: 80 parts of activated carbon; the proportion of the titanium tetrachloride is 4 parts; the proportion of the cobalt nitrate is 6 parts; the proportion of the cerium nitrate is 10 parts; the proportion of the glacial acetic acid is 20 mL; the proportion of the deionized water is 50 mL, and the glacial acetic acid and the deionized water are additionally added and do not account for the total amount; the method further comprises the following steps: 1, deeply pretreating the activated carbon carrier; 2, preparing an active component solution; step 3, breaking a sol aggregate; step 4, aging and drying; 5, roasting and activating; step 6, forming and screening; the invention aims to solve the problems encountered in the existing material through bimetallic collaborative design, carrier structure regulation and control, load process innovation and roasting system optimization.

Disclosed is a method for producing a musk fragrance intermediate by reacting an alcohol with an epoxide in the presence of zeolite as catalyst.