118 results about "Epoxide" patented technology

The invention relates to a polyisobutylene polyether alcohol amine compounds and compositions thereof. The invention also is directed to a new process for making the polyisobutylene polyether alcohol amine compound(s) by reacting a polyisobutylene epoxide with a specific polyetheramine, a protic solvent, a diluent, and optionally a catalyst. In addition, the invention further relates to the many uses of the polyisobutylene polyether alcohol amine compound(s) and composition(s) including but not limited to its use in lubricants, surfactants, emulsifiers, adhesives, resins, and the like.

The present invention relates to a bismuth-containing catalyst of formula (R1)2-(R2)-(Bi)3+ (I), wherein (R1)2- is a dianion of formula (II*), wherein A is unsubstituted or at least monosubstituted linear C3-30-alkylene, wherein at least two not adjacent CH2 groups of C3-30-alkylene are replaced by a heteroatom independently selected from the group consisting of O, S, 5 NH, N-C1-30-alkyl, N-C6-14-aryl and N-C7-30-aralkyl, wherein alkyl and aryl fragments of N-C1-30-alkyl, N-C6-14-aryl, N-C7-30-aralkyl may at least be monosubstituted by hydroxyl, halogen, -CF3, NH2, -NH-C1-6-alkyl, -NH- phenyl, -N(C1-6-alkyl)2, -N(phenyl)2, -SH, -S-C1-6-alkyl, -S-phenyl, -O-C1-6-alkyl or -O-phenyl, to process for the preparation of the bismuth containing catalyst, to a process for the preparation of a compound, oligomer or polymer comprising at least one urethane group using the bismuth-containing catalyst, to a composition comprising (i) at least one monoalcohol (B1) or polyol (B2), (ii) at least one polyisocyanate (A) and (iii) the bismuth-containing catalyst, to a coating or adhesive layer formed from the composition on a substrate, to a foam formed from the composition, and to the use of the bismuth-containing catalyst in for preparing compounds, oligomers or polymers comprising a urethane group, as esterification and transesterification catalyst and as catalyst for ring-opening polymerizations of lactones and epoxides.

The application relates to the technical field of catalysts, and discloses a nano magnesium oxide material and a preparation method and application thereof. The nano magnesium oxide material has a porous structure, wherein the particle size of the nano magnesium oxide is 20-200 nm; and the pore size of the porous structure is 5-45 nm. The classical nucleation growth process of the magnesium oxide is directionally adjusted in a weak alkaline nucleation system, and then the nano magnesium oxide with a controllable grain size distribution is obtained. The nano magnesium oxide material has good catalytic activity in the synthesis of propylene carbonate from CO2 and an epoxide under the conditions of no solvent and no auxiliary agent, and the catalyst is not deactivated after multiple uses, and has good stability.

The application belongs to the field of high polymer chemistry, and relates to a hyperbranched carbon dioxide-based polycarbonate as well as a preparation method and application thereof. The hyperbranched carbon dioxide-based polycarbonate is prepared by self-condensation polymerization of a monomer shown in formula I; in formula I, it is a three-arm structural unit derived from an initiator; and it is a carbon dioxide-based polycarbonate segment obtained by ring-opening addition polymerization of an epoxide and carbon dioxide. Compared with the prior art, the application has the following advantages: the application uses triethylborane catalyst and a mixture of TBD or DBU as a catalyst, efficiently catalyzes copolymerization of carbon dioxide and an epoxide monomer to prepare a hyperbranched carbon dioxide-based polycarbonate with a new structure, and improves the glass transition temperature and fat dissolving performance of the polymer.

The application belongs to the technical field of photocatalytic CO2 cycloaddition reaction, and particularly relates to a preparation method of a vacancy defect layered bismuth semiconductor material and application of the vacancy defect layered bismuth semiconductor material in photocatalytic CO2 cycloaddition reaction. The material is based on a bismuth semiconductor material with a Sillen-Aurivillius structure, and a defect site is constructed by vacancy regulation of the material. Low-valence metal ions exposed by the vacancy defect can be used as Lewis acid sites to adsorb and activate epoxides, and the defect site can promote separation of photo-generated carriers, thereby enhancing surface reaction kinetics and effectively improving photocatalytic activity of the material, and finally promoting photocatalytic CO2 cycloaddition reaction performance.

The invention discloses a zinc dicarboxylate catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst synthesis. The zinc dicarboxylate catalyst provided by the invention is prepared according to the following method: further reacting an intermediate obtained by reacting dicarboxylic acid with alkali metal hydroxide with zinc salt at constant temperature and low temperature, mixing the obtained mixture with ethanol, filtering, and washing a filter cake to obtain the high-activity zinc dicarboxylate catalyst. The zinc dicarboxylate catalyst with a more regular crystal form is obtained by accurately controlling the temperature and the pH value of a reaction mixture, the catalyst is a large-crystal-cluster rectangular flaky crystal, and the crystal cluster length of the catalyst is obviously larger than that of an existing zinc dicarboxylate catalyst. Meanwhile, the crystal thickness is obviously lower than that of the existing dicarboxylic acid catalyst. The zinc dicarboxylate catalyst disclosed by the invention shows very high catalytic activity in the process of catalyzing a CO2-epoxide copolymerization reaction.

The invention discloses a synthesis method of olefin epoxide and a used catalyst. According to the synthesis method, a complex of a Schiff base ligand and metal ions is adopted as a catalyst, and the structural formula of the Schiff base ligand is shown in the specification. According to the synthesis method, a solvent is not needed, the catalyst dosage is small, the reaction condition is mild, and meanwhile the olefin conversion rate and the target product selectivity are remarkably improved.

The application discloses a kind of high-efficiency heterogeneous catalyst for CO2 ring addition preparation cyclic carbonate and its preparation method and application, belong to catalyst technical field.The high-efficiency heterogeneous catalyst is transition metal doped polyoxometalate coordination polymer, chemical general formula is C 16 H 58 M2N2Na2O 48 V 10 Wherein, M is selected from Co 2+ , Ni 2+ , Cu 2+ Or Zn 2+ Its preparation method is: sodium vanadate, transition metal acetate and bis (2-hydroxyethyl) amino (trihydroxymethyl) methane ligand are dissolved in water with pH being 1~3, stirring reaction, after filtration, crystallization is stationary, and is obtained.In the ring addition reaction of CO2 and epoxide, the catalyst and cocatalyst tetrabutylammonium bromide synergistic effect, catalytic yield can be up to 98.2%, selectivity is more than 99%, and catalytic activity still remains at 88% after recycling five times.

The application discloses a catalyst for preparing beta-lactone by epoxide carbonylation and a preparation method and application thereof. The catalyst is composed of a homogeneous metal complex and a heterogeneous supported cobalt catalyst. The homogeneous metal complex is one of a porphyrin metal complex and a Schiff base metal complex. The heterogeneous supported cobalt catalyst is composed of a metal center and an organic phosphine ligand polymer connected with the metal center through a coordination bond. The metal center is cobalt, and the organic phosphine ligand polymer is a cross-linked polymer containing a repeating phosphine ligand unit. The metal center is connected with P atoms in the organic phosphine ligand polymer through a coordination bond. The cobalt center forms a stable coordination structure through a ligand, and the coordination layer of cobalt satisfies an electronic saturation state. The cobalt catalyst has high stability, is suitable for a fixed bed or a slurry bed reactor, is favorable for realizing continuous and stable operation of an epoxide carbonylation reaction, and has good industrial amplification potential.

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 utility model belongs to chemical equipment technical field, specifically is a kind of cyclohexene class epoxide disulfuration preparation kettle, including reserve kettle, the upper surface of reserve kettle is connected with the shaft of flange plate movably, the upper surface of the top shaft of reserve kettle is connected with the stirring rod of penetration, the inner arc surface of reserve kettle is equipped with preparation cavity, and the inner arc surface of preparation cavity is sleeved with jar body heating wire;Through gas guiding valve and exhaust valve, inert gas enters dispersion assembly through gas delivery pipe, and in annular cavity piece, gas flows along guide groove spirally, this design can effectively prolong the residence time of gas in cavity, make it fully dispersed, subsequently, gas is sprayed out with even flow rate through dense gas distribution spray hole, and strong turbulent flow is formed in preparation cavity, this turbulent flow can rapidly agitate cavity air, make inert gas and air fully mix and extrude air, to realize efficient replacement, isolate air to prevent raw material oxidation or explosion risk, and guarantee production safety and stability.

This invention relates to the field of catalyst technology, disclosing a quaternary ammonium salt coordination bimetallic catalyst, its preparation method, and its applications. The preparation method of the quaternary ammonium salt coordination bimetallic catalyst includes reacting a solution containing a potassium polycyanometalate and a terminal hydroxyl-terminated quaternary ammonium salt ligand with a metal salt solution to obtain the quaternary ammonium salt coordination bimetallic catalyst. This invention uses a terminal hydroxyl-terminated quaternary ammonium salt as the ligand, directly preparing the quaternary ammonium salt coordination bimetallic catalyst while synthesizing the bimetallic catalyst. The preparation process of this invention is simple, and the obtained quaternary ammonium salt coordination bimetallic catalyst can be directly recycled after filtration. The quaternary ammonium salt coordination bimetallic catalyst obtained by this invention can be used to synthesize carbon dioxide-based cyclic carbonates, exhibiting high catalytic efficiency, high selectivity, and a certain degree of water tolerance. The conversion rate of epoxides can reach over 99%, and the selectivity can reach over 99%.

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.

The invention discloses a preparation method of polyether polyol for flatulence slow-rebound foam, and relates to the technical field of polyether polyol synthesis, and the preparation method comprises the following steps: S1, preparing an initiator: mixing glycerol and potassium hydroxide for reaction, dehydrating for 1-3 hours at 110-120 DEG C under vacuum condition to obtain potassium glycerol with the water content of less than or equal to 0.05%, and filtering to obtain the initiator; wherein the mass ratio of potassium hydroxide to glycerol is 1: (13-20); s2, carrying out two-stage polymerization reaction; and S3, refining treatment. In the middle stage of the reaction, the feeding proportion of the epoxide is changed, the proportion of the ethylene oxide is increased, and a non-ethylene oxide end-capping process is adopted to prepare the swellable slow-rebound polyether polyol. When the process is used for producing polyether, the reaction speed of epoxypropane in the early stage of reaction is higher, meanwhile, the situation that the production period is prolonged due to intermediate curing is avoided, and the production efficiency is improved. The polyether applying the process has better performance during foaming, has stronger adaptability to a formula, and avoids wettability reduction of foam and foam shrinkage during foaming caused by ethylene oxide end capping.

The present application relates to a kind of sulfonated metal Salen and polyether ionic liquid binary system catalysis method for preparing cyclic carbonate by the ring addition of CO2 and epoxide;In order to improve the shortcomings that metal complex catalyst is difficult to realize recycling and organic catalyst has lower catalytic activity, the present application combines metal complex catalyst with organic catalyst, creates a kind of sulfonated metal Salen and polyether ionic liquid binary catalytic system, realizes the efficient synergistic catalysis of sulfonated metal Salen and polyether ionic liquid;The binary catalyst has the advantages of simple construction, high catalytic activity and selectivity, easy separation cycle, long life and low loss, meets the process requirements of green synthesis.

This application discloses a bio-based polyether polyol suitable for supercritical carbon dioxide-assisted foaming, its preparation method, and a rigid polyurethane foam using the same, belonging to the field of polyurethane technology. This application uses vegetable oil as raw material and obtains a bio-based polyol suitable for scCO2-assisted foaming through alcohol (amine) ester exchange, free radical Pudovik reaction, and epoxide anion ring-opening reaction. This polyol also possesses intrinsic flame-retardant properties. While using scCO2-assisted foaming, it eliminates the need for adding non-environmentally friendly physical foaming agents, and the main component of the raw material is biomass-derived vegetable oil, offering advantages such as green environmental protection and low cost, making it suitable for industrial-scale application.

Described herein is a method of preparing a crosslinked carboxymethyl cellulose and / or a salt thereof, compositions and uses of the crosslinked carboxymethyl cellulose. The method includes providing an aqueous solution comprising a salt of carboxymethyl cellulose and a linker compound, the linker compound comprising two or more terminal epoxides, incubating the aqueous solution for at least 4 hours at a temperature from 50 ºC to 100 ºC to react the salt of carboxymethyl cellulose with the two or more terminal epoxides to obtain the crosslinked carboxymethyl cellulose. The composition includes carboxymethylcellulose crosslinked with a plurality of linking moieties and / or a salt, each linking moiety join two glucopyranose monomer units of carboxymethylcellulose to form a crosslink, the linking moiety having two or more hydroxyl groups.

The present disclosure provides synthesizing multi-functional polymerizable compounds and methods for the synthesizing the same. The methods include reacting a compound of Formula (Ia) with an epoxide of Formula (Ib) with quantitative conversion, requiring only an aqueous work-up for purification. Further provided herein are methods of producing polymerizable composition, methods of forming an article by additive manufacturing processes (e.g., via 3D printing), such as orthodontic appliances with increased stain resistance.

The invention discloses a dispersion stabilizer and a preparation method thereof, and high-activity polymer polyol. The dispersion stabilizer is prepared by reacting polyoxypropylene polyol with two anhydrides and then reacting with an epoxy compound. The preparation method of the high-activity polymer comprises the following step: in the presence of an initiator and a dispersion stabilizer, polymerizing basic polyether polyol and an olefinic unsaturated monomer to obtain the high-activity polymer polyol. The product obtained by the preparation method has the characteristics of high inspiration speed, good foaming height and excellent mechanical properties during polyurethane foaming.

The invention relates to a curable compound which can be removed using moisture, the compound comprising the following components: (A) a tertiary epoxide; (B) a vinyl ether; and (C) a latent acidifier for the cationic polymerisation. Component (A) and / or component (B) comprise at least one at least difunctional compound. Component (B) is present in a proportion of at least 25 wt.%, based on the total weight of the compound; and components (B) and (A) are present in the compound in a ratio of at least 1.5:1, based on the proportion by weight of the particular component relative to the total weight of the compound. The invention also relates to the use of such a compound and to a method for gluing, coating or casting.

The present invention relates to an orally administrable complex having an average hydrated particle diameter of 10 nm to 100 nm and comprising: a core composed of metal or metal oxide-based nanoparticle(s); and a shell disposed as an acid-resistant barrier layer on the surface of the core and coated with polysaccharide crosslinked colloidal particles which form multi-point coordination bonds with metal ions on the surface of the core and have an average hydrated particle diameter of 2 nm to 8 nm and a surface charge of -20 mV to 0 mV. The polysaccharide crosslinked colloidal particles are characterized in that, in an aqueous solvent, (i) an -OH functional group of a monosaccharide, which is a building block of a linear polysaccharide, a branched polysaccharide, or a cyclic polysaccharide, is modified using a first crosslinking agent having an epoxide group, and (a) the functional group modified by the first crosslinking agent and a spatially adjacent -OH functional group are directly crosslinked and / or (b) two spatially adjacent functional groups modified by the first crosslinking agent are crosslinked intramolecularly and / or intermolecularly via a second crosslinking agent having two or more amine groups (-NH2) to form polysaccharide crosslinked particles, and (ii) the number of crosslinking agent-derived basic amine groups exposed on the surface is modified with a -COOH functional group so that the surface charge of the polysaccharide crosslinked colloidal particles is in the range of -20 mV to 0 mV. The orally administrable complex according to the present invention is a T2 MRI contrast agent that can be used as an active ingredient of a composition for diagnostic biliary and pancreatic imaging.

The invention relates to anti-yellowing regenerated spandex and a preparation method thereof, the anti-yellowing regenerated spandex comprises recycled spandex, a chain extender and a chelating agent, the recycled spandex comprises one or more of spandex waste silk, spandex waste or spandex components of waste fabrics; the chain extender comprises a bifunctional epoxy compound; the chelating agent is prepared from one or more of triphenyl phosphate, tripolyphosphate, hexametaphosphate, amino trimethylene phosphonate and hydroxyethylidene diphosphonate. Recycled spandex is adopted as a main raw material, and yellowing of a product in the storage and use process is remarkably delayed on the basis of guaranteeing the comprehensive performance of the fiber through repolymerization and addition of specific functional auxiliaries.

A two-component coating composition comprisingat least one water-dispersible polymer mixture (A) which has at least onemercapto-reactive group selected from the group of epoxide and Michael acceptor,and alsoat least one water-emulsifiable thiol (B) comprising, as formation components,(Ba) at least one compound having at least two mercapto groups,(Bb) at least one compound having at least one mercapto-reactive group and at least one dispersing group,wherein the formation component (Ba) has a Hansch parameter of at least 2.0.

The application discloses a high-efficiency stable Lewis acid-containing heterogeneous catalyst and a preparation method and application thereof, and belongs to the technical field of cycloaddition reaction catalysts.The heterogeneous catalyst has strong nucleophilic groups and strong electrophilic groups.The Lewis acid-containing raw material is selected from one of zinc acetate, cobalt acetate, copper acetate, ferrous acetate, magnesium acetate, nickel acetate, calcium acetate, manganese acetate, lead acetate and tin acetate.The prepared Lewis acid-containing heterogeneous catalyst is applied to catalyzing the cycloaddition reaction of an epoxide and CO2, and the cycloaddition reaction of ethylene oxide (EO) / propylene oxide (PO) and CO2 is preferentially adopted.The problems of difficult separation of a homogeneous catalyst and insufficient activity of a heterogeneous catalyst are preferably solved.

The invention relates to a polyisobutylene polyether alcohol amine compounds and compositions thereof. The invention also is directed to a new process for making the polyisobutylene polyether alcohol amine compound(s) by reacting a polyisobutylene epoxide with a specific polyetheramine, a protic solvent, a diluent, and optionally a catalyst. In addition, the invention further relates to the many uses of the polyisobutylene polyether alcohol amine compound(s) and composition(s) including but not limited to its use in lubricants, surfactants, emulsifiers, adhesives, resins, and the like.

A composition of matter useful for catalyzing an alkene epoxidation reaction using molecular oxygen (O2) as an oxidant. including a plurality of structures comprising nanostructures or microstructures each comprising a coinage metal: and a plurality of single oxophilic metal atoms. The oxophilic metal is characterized by an oxide formation enthalpy being more exothermic than that of the coinage metal. In one or more examples. the oxophilic atom comprises nickel and the coinage metal comprises silver, and a concentration of the nickel increases selectivity to greater than 85% for the epoxidation reaction CH2═CH2+½O2→(CH2)2O over combustion of ethylene forming carbon dioxide. and for an ethylene conversion of greater than 5%.

The present invention relates to the use of an electron beam (EB) curable composition for the production of a coil coating cured with EB wherein the composition comprises a cationically curable resin comprising a1) an epoxide, a2) a polyoxetane compound having at least two oxetane groups and a3) a cationic initiator, wherein the weight ratio between the epoxide a1) and the polyoxetane a2) is in the range of 0.3 to 5.

The present invention relates to a catalyst comprising a divalent metal, such as Sn, to a process for preparing the catalyst comprising a divalent metal, to a process for preparing a compound, oligomer or polymer comprising at least one urethane group using the catalyst comprising a divalent metal, to a composition comprising (i) at least one monohydric alcohol (B1) or polyhydric alcohol (B2), (ii) at least one polyisocyanate (A) and (iii) at least one catalyst comprising a divalent metal, to a layer formed from the composition on a substrate, to a foam formed from the composition, and to the use of the catalyst comprising a divalent metal for preparing a compound, oligomer or polymer comprising urethane groups, as catalyst for esterification and transesterification and as catalyst for the ring-opening polymerization of lactones and epoxides.

This application provides a method for preparing polyether, comprising the following steps: adding a polyol initiator and a supported catalyst KF / γ-Al2O3 to a first reactor, heating to 90°C, then adding a first epoxide to the first reactor at a reaction temperature of 90-110°C, continuing the reaction at this temperature until the pressure inside the first reactor no longer decreases, and removing at least one of the water and low-boiling substances generated in the reaction to obtain a polyether intermediate; adding the supported catalyst KF / γ-Al2O3, an organic solvent, and the polyether intermediate to a second reactor, heating to 80°C, then adding a second epoxide to the second reactor at a reaction temperature of 80-100°C, and continuing the reaction at this temperature until the pressure inside the second reactor no longer decreases, and removing at least one of the low-boiling substances and the organic solvent to obtain a polyether. This preparation method is advantageous for further increasing the molecular weight of the polyether under the same conditions while also reducing the molecular weight distribution of the polyether product.

The present invention relates to mesoporous amine-functionalized silica catalysts with worm-hole or channel-like morphology, prepared using 3-aminopropyl trimethoxysilane (3- APTMS) or 3-aminopropyltriethoxysilane (APTES). The catalysts exhibit average pore diameters of 1-100 nm and specific surface areas of 100-1,000 m2 / g. The preparation process involves mixing Pluronic P123 with hydrochloric acid at 30-40°C, followed by addition of a mixture of 3-APTMS or 3-APTES with tetraethyl orthosilicate (TEOS), and subsequent hydrothermal treatment. The choice of precursor determines morphology: 3- APTMS yields worm-hole structures, while 3-APTES produces channel-like structures. These catalysts efficiently convert epoxides and carbon dioxide into cyclic organic carbonates with excellent yield. Additionally, the invention discloses a process for preparing styrene carbonate-coated zinc anodes and assembling full cells incorporating these anodes, significantly enhancing the durability of aqueous rechargeable zinc-metal batteries (ARZMBs).