14 results about "Ethoxypropionic acid" patented technology

The invention provides a production method of ethyl 3-ethoxypropionate, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: adding ethanol and a catalyst into a reactor, dropwise adding ethyl acrylate, stirring for reaction, filtering, and recovering the catalyst to obtain ethyl 3-ethoxypropionate; the catalyst is a modified UiO-66-NH2 / layered metal oxide catalyst loaded with K2O (potassium oxide). The synthesis of the ethyl 3-ethoxypropionate is carried out under the catalytic action of the catalyst, the preparation method is simple, the conditions are mild, the product yield is high, the catalyst can be repeatedly utilized for multiple times, the method is green and environment-friendly, the cost is relatively low, and the method has a wide application prospect.

The invention relates to a preparation method of 3-ethoxy isoamyl propionate, and belongs to the technical field of organic solvent synthesis. The preparation method of the 3-ethoxy isoamyl propionate comprises the following steps: S1, adding ethanol, a polymerization inhibitor and a catalyst A into a reaction kettle, heating to 40-55 DEG C, then dropwise adding ethyl acrylate, preserving heat, and carrying out addition reaction for 1-3 hours to obtain a reaction mixture; s2, adding an acidic material for neutralization, and carrying out vacuum rectification to obtain ethyl 3-ethoxypropionate; s3, adding ethyl 3-ethoxypropionate and a catalyst B into a reaction kettle, heating to 100-120 DEG C, introducing isoamyl alcohol, controlling the reaction temperature to 100-115 DEG C, and carrying out transesterification for 2.5-4 hours to obtain a crude product; and S4, cooling to stop the reaction, separating to remove the catalyst B, and carrying out reduced pressure rectification on the obtained crude product to obtain the 3-ethoxypropionic acid isoamyl ester. The method has the effects of mild process, high conversion rate and high product yield.

The invention provides a method for synthesizing ethyl 3-ethoxypropionate, and belongs to the technical field of chemical synthesis; the preparation process thereof comprises the following steps: preparation of carbon-encapsulated ferrosoferric oxide; preparation of magnetic hydrotalcite; preparation of a catalyst; and synthesis of ethyl 3-ethoxypropionate. The invention prepares a novel catalyst, which has a significant effect in the reaction of ethyl acrylate and ethanol, can improve the reaction rate and selectivity, shorten the reaction time, and improve the production efficiency; the catalyst has good magnetic properties, excellent stability, can be quickly separated from the reactant under the action of a magnetic field, and can continue to be used after recovery, is conducive to recycling and reuse, and can reduce production costs.

The invention discloses a method for recycling a byproduct ethyl 3-ethoxypropionate in alpha-keto acid production. The method comprises the following steps: S1, carrying out simple fractionation on produced liquid to obtain a component I rich in ethanol; s2, the fractionated residual liquid is fed into a rectifying tower for rectification operation, a component II rich in 3-ethyoxyl ethyl propionate is obtained at the tower top, water is obtained at the tower bottom, and the water can be directly applied to production of alpha-keto acid; s3, washing the component II with a proper amount of water, and washing off ethanol to obtain a crude product ethyl 3-ethoxypropionate containing trace water; and S4, drying the crude product ethyl 3-ethoxypropionate, so as to obtain the ethyl 3-ethoxypropionate with the purity of more than 99.5%. The method has the characteristics of low production cost, energy conservation, environment friendliness and easiness in product separation, and valuable components such as ethyl acrylate, ethanol and ethyl 3-ethoxypropionate can be efficiently recovered.

The application relates to the technical field of 3-ethoxypropionic acid ethyl ester preparation, and provides a 3-ethoxypropionic acid ethyl ester preparation device and a preparation method. The 3-ethoxypropionic acid ethyl ester preparation device comprises a thin film evaporator main body, a supporting shaft, a driving mechanism and a roller shaft. The thin film evaporator main body has an evaporation cavity, the supporting shaft is rotatably arranged in the evaporation cavity, the driving mechanism is connected with the power output end of the supporting shaft, and is used for driving the supporting shaft to rotate around the axis of the supporting shaft. The roller shaft is rotatably arranged on the supporting shaft around the axis of the roller shaft, and the roller shaft is in rolling cooperation with the inner wall of the evaporation cavity. The 3-ethoxypropionic acid ethyl ester preparation method uses the above-mentioned 3-ethoxypropionic acid ethyl ester preparation device to complete the evaporation and purification of 3-ethoxypropionic acid ethyl ester. The 3-ethoxypropionic acid ethyl ester preparation device and the preparation method can improve the technical problem that the evaporation and purification efficiency of 3-ethoxypropionic acid ethyl ester is low due to the non-uniformity of the thin film in the related art.

The present invention relates to functionalized cyclic carbonates with an exocyclic vinylidene group of formula (I), a process for the production of these functionalized cyclic carbonates of formula (I) in the present of a transition metal catalyst and the use of the functionalized cyclic carbonates as monomers in polymer applications.

This application relates to the field of distillation apparatus and discloses a distillation apparatus for the preparation of ethyl 3-ethoxypropionate, comprising: a chassis, which serves as a basic connecting component of the equipment and provides installation positions for other structures; a flow path heating mechanism, installed on the top left side of the chassis, for improving the heating and distillation efficiency of ethyl 3-ethoxypropionate; a distillation column is fixedly installed at the top of the flow path heating mechanism, and several trays are installed equidistantly from top to bottom inside the distillation column, the top of the distillation column being connected to a condensation mechanism via a pipeline for conducting the output distillation vapor; a fractionator is fixedly installed on the right side of the flow path heating mechanism. Through the flow path heating mechanism, condensation mechanism, liquid-solid flow mechanism, and exhaust mechanism, the internal solution preheating rate is accelerated, the internal mixing and heating efficiency is improved, while the condenser tubes continuously in contact with the vapor exhaust port are protected, reducing the damage rate and the economic cost of replacement.

The present invention relates to functionalized cyclic carbonates with an exocyclic vinylidene group of formula (I) a process for the production of these functionalized cyclic carbonates of formula (I) in the present of a transition metal catalyst and the use of the functionalized cyclic carbonates as monomers in polymer applications.

The application discloses a conjugated extended asymmetric viologen derivative, a preparation method and application thereof, and the viologen derivative comprises a compound shown in a general formula (I): wherein Ar is one of 1,4-phenylene, 1,5-naphthylene, anthracene, pyrene, tetramethylphenylene and tetrafluorophenylene; R1 is one of propionic acid, hexanoic acid, octanoic acid and 3-ethoxypropionic acid; and R2 is one of dodecyl, hexadecyl, octadecyl and 2-hexyldecyl. The application effectively solves the technical problems of a wide energy gap, a low conjugation degree, poor light emitting performance of a viologen electrochromic material in the prior art, and a fragile assembly structure and single performance of a viologen-pyrenium system.

The invention provides an efficient synthesis method of ethyl 3-ethoxypropionate, and belongs to the technical field of organic synthesis. The method comprises the following steps: filling a solid bed with a catalyst, introducing a mixed material of ethyl acrylate and absolute ethyl alcohol from the bottom for reaction, enabling a material discharged from the top to enter a rectifying tower for rectification through a filter screen, obtaining ethyl 3-ethoxypropionate, enabling the obtained ethyl 3-ethoxypropionate to enter a packaging tank, and enabling excessive absolute ethyl alcohol and a small amount of ethyl acrylate and ethyl 3-ethoxypropionate to enter a batching tank for circular reaction. The preparation method of the ethyl 3-ethoxypropionate is simple, efficient and low in cost, the catalyst is easy to recycle, the catalytic activity is high, the product yield is high, few byproducts are produced, the product purity is high, and the method has wide application prospects.

Provided are a coating film-forming composition and a method for manufacturing a semiconductor device using the same, the coating film-forming composition comprising: (a) a polymer containing a structural unit represented by the following formula (1a) or (1b), and (b) a solvent containing 1 to 49 mass% of at least one selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether, methyl 2-hydroxyisobutyrate, ethyl 3-ethoxypropionate, and ethyl lactate, and 51 to 99 mass% of water.

The present application relates to a kind of green paint compositions containing EEP and its preparation method, the green paint compositions containing EEP includes the following mass parts of ingredients: organic resin 60-80 parts, modified polyacrylate 10-40 parts, modified titanium dioxide 10-20 parts, auxiliary agent 1-10 parts, EEP 30-50 parts, water;Wherein, the modified polyacrylate is alkyl acrylate, isocyanate acrylate, polyethylene glycol acrylate, N-methyl diethanolamine reaction obtained;The modified titanium dioxide is polyacrylic acid surface modification titanium dioxide.The various components of the present application are well compatible with matrix resin, can be crosslinked to form stable network structure, improve the various properties of coating, while using green and environmentally friendly 3-ethoxy ethyl propionate as solvent, reduce the potential risk to environment and human body, with good application prospect.

The invention discloses a preparation method of precipitated silica for a low-wear conveyor belt, belonging to the technical field of silica preparation, comprising the following steps: adding ethyl 3-ethoxypropionate into a reactor, and using the ethyl 3-ethoxypropionate as a solvent of the whole reaction system; arachidic acid and a solvent are added into the reactor and stirred for 5 min, the stirring speed at the beginning is 100 r / min-150 r / min, the stirring speed is gradually increased to 200 r / min-250 r / min after stirring is conducted for 1 min-2 min, and finally the stirring speed is kept at 300 r / min-350 r / min after stirring is completed for 5 min; the arachidic acid can be prepared by hydrolyzing and separating peanut oil, the arachidic acid is C20 acid, is small in acidic side effect and high in purity, has oxidation resistance, can improve the thermo-oxidative aging resistance and corrosion resistance of rubber products, and meanwhile, as a sustainable substitute, an environment-friendly ester product will become a mainstream in the future. The method is not only environment-friendly, but also can promote sustainable development of economy and society.

The invention discloses a preparation method of tensile plant-based cobalt salt, and belongs to the technical field of preparation of cobalt salt, the preparation method comprises the following steps: adding ethyl 3-ethoxypropionate into a reactor, and using the ethyl 3-ethoxypropionate as a solvent of the whole reaction system; arachidic acid and a solvent are added into the reactor and stirred for 5 min, the stirring speed at the beginning is 100 r / min-150 r / min, the stirring speed is gradually increased to 200 r / min-250 r / min after stirring is conducted for 1 min-2 min, and finally the stirring speed is kept at 300 r / min-350 r / min after stirring is completed for 5 min; the arachidic acid can be prepared by hydrolyzing and separating peanut oil, the arachidic acid is C20 acid, is small in acidic side effect and high in purity, has oxidation resistance, can improve the thermo-oxidative aging resistance and corrosion resistance of rubber products, and meanwhile, as a sustainable substitute, an environment-friendly ester product will become a mainstream in the future. The method is not only environment-friendly, but also can promote sustainable development of economy and society.