31 results about "Cyclic ketone" patented technology

The invention belongs to the field of chemical engineering manufacturing industry, and relates to equipment and a method for producing cyclic ketone compounds by oxidizing cycloolefin by using waste gas produced by adipic acid. Raw material gas A containing nitrous oxide from an adipic acid production process production line can be subjected to oxygen removal, so that the oxygen content is less than 100ppm; the raw material gas A containing nitrous oxide from the adipic acid production line can also be purified into purer gas containing 50-99% of N2O, and the purer gas is used for reacting with the cycloolefin compound; the reaction equation is CnH2n-2 (cycloolefin) + N2O (nitrous oxide)-> CnH2n-2O (a product cyclic ketone compound) + a byproduct + N2 superscript (nitrogen), wherein n is a positive integer from 4 to 24. The device is stable in consumption quota, low in production cost and high in economic benefit compared with the prior art.

The invention discloses a preparation method of cyclic ketone. The invention provides a preparation method of a compound as shown in a formula C. The preparation method comprises the following steps: (1) in the presence of metal salt, carrying out n-th thermal rearrangement reaction on a compound as shown in a formula B to obtain the compound as shown in the formula C; after the reaction is finished, enriching metal salt; (2) adding a compound as shown in a formula B into the reaction system in the previous step, and carrying out (n + 1) th thermal rearrangement reaction to obtain a compound as shown in a formula C; after the reaction is finished, enriching metal salt; and (3) repeating the step (2) for m times. The preparation method has the advantages of high efficiency, simplicity, convenience, high catalytic efficiency, invariable yield and purity during repeated application, mild reaction conditions, less three wastes and industrial production prospect.

This invention provides a method and system for removing waxy substances from the washing water of product gas in an MTO (Methanol-to-Olefins) unit, belonging to the field of methanol-to-olefins technology. The method includes: introducing product gas into a separation tower for countercurrent contact with washing water; introducing the washing water from the middle and bottom sections of the separation tower into a first membrane extraction separator and a second membrane extraction separator, respectively, for membrane extraction with an extractant; after extraction, part of the washing water is discharged, and the remaining heat is recovered and returned to the separation tower; the extractant is regenerated in a solvent regeneration tower and recycled. The membrane extraction separator integrates impinging flow mixing, ultrasonic-enhanced mass transfer, and inorganic membrane extraction functions. The extractant is a mixture of aromatic esters, nitro aromatic compounds, and phenyl cyclic ketone compounds, or a mixture of pyridyl ionic liquid and phenyl cyclic ketone compounds. This invention can efficiently remove waxy substances from the washing water, reduce extractant loss and COD, and the extractant is easily regenerated, ensuring long-term stable operation of the unit.

This invention discloses a method for synthesizing a full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole derivative. This method uses a metal carbonyl compound as a safe carbonyl source and involves a catalytic cycle from zero-valent palladium to divalent palladium. Specifically, it involves the oxidative addition of palladium(O) via a carbon-halogen bond, the coordination and migration insertion of CO to form a carbonyl palladium species, followed by nucleophilic attack of the indole C3 ring to achieve dearomatization of the indole ring, and then reductive elimination to obtain the full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole derivative. Specifically, compound 1 and the metal carbonyl compound Co2(CO)8 are reacted under heating conditions with palladium as a catalyst, organophosphine as a ligand, and sodium salt as a base to obtain the full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole molecule. This method is a novel synthetic method for full-carbon quaternary carbocyclic ketone-spirocyclic pseudoindole derivatives, solving the problems of existing technologies such as the need for multiple reaction steps, harsh reaction conditions, narrow substrate range, and high toxicity of starting materials.

The invention provides an electrolyte additive and application, the electrolyte additive comprises a compound with a structure shown in a formula 1, X and Y are respectively and independently selected from R1 and R2, and are respectively and independently selected from a single bond, substituted or unsubstituted-CH2-and substituted or unsubstituted-CH2-CH2-. The electrolyte additive disclosed by the invention contains the compound with the structure as shown in the formula 1, and the keto-carbonyl group can be coordinated with metal ions in electrolyte salt, so that the additive can move to the surface of an electrode along with current to generate electrochemical reaction on the surface of the electrode; in addition, an open ring of a cyclic ketone structure is polymerized and crosslinked with organic matters in the battery or self to form a double-electrolyte salt organic film with good stability, high structural strength and good ion permeability, so that the high-temperature storage and high-temperature cycle performance of the battery is improved.

The invention discloses a method for refining polymer-grade m-pentadiene. The method comprises the following steps: carrying out selective hydrogenation reaction on a crude m-pentadiene material to remove alkyne so as to obtain an alkyne-removed m-pentadiene intermediate material; mixing the deacetylated m-pentadiene intermediate material with cyclic ketone, alcohol and organic alkali, and carrying out reactive distillation to remove cyclopentadiene so as to obtain decyclized m-pentadiene; and refining and purifying the decyclized m-pentadiene through water washing and extractive distillation to obtain the decyclized m-pentadiene. The obtained polymer-grade pentadiene product is high in purity, the content of impurity cyclopentadiene in the polymer-grade pentadiene product is lower than 1ppm, and the content of impurity alkyne in the polymer-grade pentadiene product is lower than 20ppm.

The present invention relates to an improved Bayer-Villiger oxidation process of cyclic ketones to lactones in the presence of oxygen and an aldehyde.

This invention discloses a method for synthesizing lactone compounds and cerium-catalyzed lactone compounds. The synthesis method comprises the following steps: under visible light irradiation, in an oxygen atmosphere, and in the presence of a photocatalyst and a cerium catalyst, a cyclic ketone compound containing a structural fragment as shown in Formula II is subjected to a cyclization reaction in a solvent to obtain a lactone compound containing a structural fragment as shown in Formula I. This method uses readily available raw materials to conveniently and rapidly synthesize various medium- and large-cyclic lactones, and is simple, economical, and environmentally friendly.

The present invention relates to a salt recovery solution and to a process for separating a salt from an aqueous solution. The present disclosure also relates to a salt recovery solution and to its use to concentrate a salt or brine solution by recovering water therefrom. The salt recovery solution comprising at least two or more components independently selected from any combination of integers a), b), c) and d): where a) is a straight, branched or optionally substituted cyclic C4-C9 ether containing compound; b) is a straight chain or branched C3-C9 alkyl substituted by —OH; c) is a straight chain, branched or cyclic C4-C9 ketone or C4-C9 diketone; and d) is a straight chain or branched C3-C9 ester containing compound.

An oral care composition is provided and includes a hops extract, where the hops extract includes dimethyl disulfide, a stannous ion source, and a stabilizing system including a Michael acceptor. The Michael acceptor has an alpha, beta-unsaturated carbonyl group. The alpha, beta-unsaturated carbonyl group can include an aldehyde, a ketone, a cyclic ketone, or a combination thereof.

The application discloses a method for preparing mixed hydrogen natural gas and cyclic ketone compounds based on a water-phase reforming system, which comprises the following steps: adding a CeO2 or ZrO2 or TiO2 supported Ni-based catalyst into a reaction kettle, adding cellulose and water, controlling the mass of the cellulose to be 0.4-0.5% of the mass of the water, sealing the reaction kettle, replacing the air in the reaction kettle, and reacting at a temperature of 230-250 DEG C under a pressure of 0.1-1 MPa for 2-4 h; after the reaction is completed, the mixed hydrogen natural gas is obtained in the gas component, and the cyclic ketone compounds are obtained in the liquid phase. The method realizes that the gasification C accounts for >99% of the proportion of the raw material C, the yield of the mixed hydrogen natural gas can reach 94.3%, and the selectivity of the mixed hydrogen natural gas can reach 71%. The method has the advantages of high efficiency, low cost and environmental protection, and has important values for the high-value utilization of cellulose and the development of environmental protection energy.

The invention discloses a method for preparing dinitrile compounds from cyclic ketone compounds, and belongs to the technical field of cyclic ketone compound synthesis. The method for preparing the dinitrile compound by using the cyclic ketone compound comprises the following steps: mixing the cyclic ketone compound, ammonia water, a Cu-based catalyst, a 1, 10-phenanthroline ligand and a solvent, and then carrying out ammoxidation reaction in an oxygen atmosphere to obtain the dinitrile compound. The method provided by the invention has the advantages of simple preparation process, high yield, mild reaction conditions, cheap and easily available raw materials and no use of noble metals, and provides an efficient, environment-friendly and low-cost synthetic route for the production of dinitrile compounds.

The invention provides an electrolyte additive and application, the electrolyte additive comprises a compound with a structure shown in a formula 1, X and Y are independently selected from alkyl or halogenated alkyl with a carbon atom number of 1-5, and R is selected from alkyl or halogenated alkyl with a carbon atom number of 1-5. The electrolyte additive disclosed by the invention contains the compound with the structure as shown in the formula 1, and the keto-carbonyl group can be coordinated with metal ions in electrolyte salt, so that the additive can move to the surface of an electrode along with current to generate electrochemical reaction on the surface of the electrode; in addition, an open ring of a cyclic ketone structure is polymerized and crosslinked with organic matters in the battery or self to form a double-electrolyte salt organic film with good stability, high structural strength and good ion permeability, so that the high-temperature storage and high-temperature cycle performance of the battery is improved.

The purpose of the present invention is to provide a polyamic acid composition containing a polyamic acid that has a suitable viscosity and is obtained by specifically using a cyclic ketone-based solvent as an organic solvent in which a diamine component and a tetracarboxylic acid dianhydride component undergo a satisfactory addition polymerization reaction.　The present invention is a polyamic acid composition containing an organic solvent and a polyamic acid that is the product of an addition reaction between a diamine component and a tetracarboxylic acid dianhydride component in the organic solvent, wherein the organic solvent includes a cyclic ketone-based solvent, and the diamine component includes a compound having one or more ether group, sulfone group, or trifluoromethyl group in each molecule. The diamine component more preferably includes an aromatic diamine compound that has an ether group and has three or more aromatic rings in each molecule. The tetracarboxylic acid dianhydride component more preferably includes a compound that has an aromatic ring and an ether group or ketone group as an aromatic ring linking group.

This invention discloses a method for constructing disulfide mimetic compounds for late cyclization of peptides. The disclosed method provides late cyclization via thioacetalization of peptides containing two cysteine ​​residues to form a thioacetal group. These bonds are stable under acidic, basic, and reducing conditions. A wide range of cyclic ketones, and even acetone, can be used as crosslinking agents in this reaction. Since trifluoroacetic acid (TFA) can function as both a catalyst and the sole solvent, most peptide sequences can be cyclized by the disclosed method. The disclosed method offers many advantages and merits, including the use of TFA as a robust catalyst and the sole required solvent, the readily available availability of acetone and a variety of cyclic ketones as reactants, good chemoselectivity and tolerance of natural peptides to this reaction, and the fact that the resulting crosslinks are structural mimetic compounds of disulfides.

A process for producing a C10-C18 dialkylcycloalkane, the process comprising: (i) subjecting a furfural compound, a furfuryl alcohol compound or a mixture of a furfural compound and a furfuryl alcohol compound to a reductive rearrangement reaction in the presence of water, hydrogen and a hydrogenation catalyst comprising a supported transition metal, to produce a reaction product comprising an active methylene group-containing cyclic ketone selected from the group consisting of cyclopentanone, substituted cyclopentanone, cyclohexanone or substituted cyclohexanone and mixtures thereof; (ii) reacting the active methylene group-containing cyclic ketone obtained in step (i) with a furfural compound in an aldol condensation reaction in the presence of a catalyst to produce a reaction product comprising an unsaturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound; (iii) subjecting the unsaturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound produced in step (ii) to a hydrogenation reaction in the presence of hydrogen and a hydrogenation catalyst to produce a saturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound; and (iv) subjecting the saturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound produced in step (iii) to a hydrodeoxygenation step in the presence of hydrogen and a hydrodeoxygenation catalyst to produce a hydrocarbon product comprising C10-C18 dialkyl cycloalkanes, wherein the reaction product of step (i) is subjected to an azeotropic distillation step (ia) to produce a distillate stream comprising a majority of the active methylene group-containing cyclic ketone and a bottoms stream comprising a majority of water and a fraction of the active methylene group-containing cyclic ketone, the cyclic ketone containing active methylene groups is recovered from the reaction product produced in step (i), wherein the distillate stream is used as a feed in step (ii).

The invention discloses an aryl quinine onium anion exchange membrane containing a conjugated twisted structure, and also discloses a preparation method of the anion exchange membrane, and the preparation method comprises the following steps: mixing Ar1, Ar2 and 3-quinuclidinone hydrochloride, dissolving in a solvent I, adding a catalyst I and a catalyst II, and reacting to obtain an aryl quinine precursor polymer; dissolving the precursor polymer in a solvent III, adding a catalyst III and a nucleophilic reagent I, and carrying out quaternization reaction to prepare an aryl quinine onium polymer; dissolving the aryl quinine onium polymer in a solvent III, and filtering to obtain a membrane casting solution; and carrying out tape casting and drying on the membrane casting solution, and then carrying out ion exchange to obtain the anion exchange membrane containing the conjugated twisted structure. The anion exchange membrane has the characteristics of high mechanical strength, high conductivity and good alkali-resistant stability. According to the method, the stability and the ionic conductivity of the anion exchange membrane are improved by introducing a conjugate distortion structure, and the method is simple and convenient to operate and easy for industrial production.

The purpose of the present invention is to provide a polyamic acid composition containing a polyamic acid that has a suitable viscosity and is obtained by specifically using a cyclic ketone-based solvent as an organic solvent in which a diamine component and a tetracarboxylic acid dianhydride component undergo a satisfactory addition polymerization reaction.　The present invention is a polyamic acid composition containing an organic solvent and a polyamic acid that is the product of an addition reaction between a diamine component and a tetracarboxylic acid dianhydride component in the organic solvent, wherein the organic solvent contains a cyclic ketone-based solvent, and the tetracarboxylic acid dianhydride component contains a compound that has diphenyl ether group in each molecule. The tetracarboxylic acid dianhydride component more preferably includes a compound having at least two diphenyl ether groups in each molecule.

Chemical processing techniques for removing elastomeric polymers and colorant from mixed textile feedstocks for recycling are described. In an embodiment, a method can comprise contacting a heated solution comprising a solvent to a mixed textile feedstock as positioned within a vessel or chamber, wherein the mixed textile feedstock comprises elastomeric polymers or a combination of elastomeric polymers and a colorant, and wherein the solvent comprises a cyclic ketone. The method further comprises removing at least some of the elastomeric polymers (or both the elastomeric polymers and the colorant) as a result of the contacting, resulting in a transformation of the textile feedstock into a purified textile product that excludes the at least some of the elastomeric polymers (and the colorant when included in the textile feedstock). The mixed textile feedstock can comprise other types of textile materials (in addition to the elastomeric polymers), such as polyester, cotton, nylon, and others.

The invention relates to a compound of the following formula I: formula (I) or one of the enantiomers, isomers or diastereoisomers of same, or a mixture thereof, wherein R is a linear or cyclic C3-C6 alkyl, comprising two hydroxyl functions, a linear or cyclic C3-C6 aldehyde, comprising two hydroxyl functions, or a linear or cyclic C3-C6 ketone, comprising two hydroxyl functions, and wherein R1 is a C1-C3 alkyl, or a salt, or a solvate thereof.

Chemical processing techniques for separating components of mixed textile feedstocks for recycling are described. In an embodiment, a method can comprise contacting a mixed textile feedstock comprising a polyester material, a cellulosic material, a disperse colorant, and elastomeric polymers with a solution comprising a cyclic ketone solvent at a first temperature to extract at least some of the disperse colorant and at least some of the elastomeric polymers, resulting in an intermediate textile feedstock excluding the at least some of the disperse colorant and the at least some of the elastomeric polymers; contacting the intermediate textile feedstock with the solution at a second temperature greater than the first temperature to extract at least some of the polyester material in the solution; and extracting the at least some of the polyester material from the solution, resulting in extracted polyester material. The method further results in isolated cellulosic material.

Chemical processing techniques for removing elastomeric polymers and colorant from mixed textile feedstocks for recycling are described. In an embodiment, a method can comprise contacting a heated solution comprising a solvent to a mixed textile feedstock as positioned within a vessel or chamber, wherein the mixed textile feedstock comprises elastomeric polymers or a combination of elastomeric polymers and a colorant, and wherein the solvent comprises a cyclic ketone. The method further comprises removing at least some of the elastomeric polymers (or both the elastomeric polymers and the colorant) as a result of the contacting, resulting in a transformation of the textile feedstock into a purified textile product that excludes the at least some of the elastomeric polymers (and the colorant when included in the textile feedstock). The mixed textile feedstock can comprise other types of textile materials (in addition to the elastomeric polymers), such as polyester, cotton, nylon, and others.

The invention discloses a method for preparing chiral lactam from prochiral ketone, and belongs to the technical field of chemical synthesis. According to the method, chlorobenzene or toluene or a chlorobenzene / diethyl ether mixed solution is used as a solvent, under the action of a chiral catalyst, prochiral cyclic ketone and sulfonyl hydroxylamine are subjected to a desymmetrical nitrogen atom insertion reaction at-78 DEG C to 25 DEG C, high-stereoselectivity chiral lactam is prepared in one step, and the reaction time is 2-8 h. The method has the advantages that the raw materials are low in price and easy to obtain, the chiral catalyst is commercially available and small in dosage, the product has excellent stereoselectivity, post-treatment is simple and convenient, and a novel green and economical way with wide industrial application prospects is provided for synthesis of chiral drugs and fine chemicals.

Chemical processing techniques for separating components of mixed textile feedstocks for recycling are described. In an embodiment, a method can comprise contacting a mixed textile feedstock comprising a polyester material, a cellulosic material, a disperse colorant, and elastomeric polymers with a solution comprising a cyclic ketone solvent at a first temperature to extract at least some of the disperse colorant and at least some of the elastomeric polymers, resulting in an intermediate textile feedstock excluding the at least some of the disperse colorant and the at least some of the elastomeric polymers; contacting the intermediate textile feedstock with the solution at a second temperature greater than the first temperature to extract at least some of the polyester material in the solution; and extracting the at least some of the polyester material from the solution, resulting in extracted polyester material. The method further results in isolated cellulosic material.

The present invention aims to provide a moisture-curing composition that can yield a cured product with excellent properties, including flame retardancy and adhesive properties. [Solution] A moisture-curing composition comprising a urethane prepolymer U having isocyanate groups at its molecular ends, a latent curing agent L that generates an amine by hydrolysis, and a flame retardant F, wherein the flame retardant F comprises two or more different compounds. The flame retardant F comprises a compound M having a structure in which an amine having a triazine ring and a cyclic ketone are hydrogen-bonded, and a phosphate ester compound C having a viscosity of 1 mPa·s to 500 mPa·s at 25°C. The phosphate ester compound C mainly consists of tris(2-chloro-1-methylethyl) phosphate, trixylenyl phosphate, or trioctyl phosphate. The compound M mainly consists of melamine cyanurate.

A process for the production of C10-C18 dialkylcycloalkanes comprising: (i) subjecting a furfural compound, a furfuryl alcohol compound or a mixture of a furfural compound and a furfuryl alcohol compound to a reductive rearrangement reaction in the presence of water, hydrogen and a hydrogenation catalyst comprising a supported transition metal, to produce a reaction product comprising an active methylene group-containing cyclic ketone selected from the group consisting of cyclopentanone, substituted cyclopentanone, cyclohexanone or substituted cyclohexanone and mixtures thereof; (ii) reacting the active methylene group-containing cyclic ketone obtained in step (i) with a furfural compound in an aldol condensation reaction in the presence of a catalyst to produce a reaction product comprising an unsaturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound; (iii) subjecting the C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound produced in step (ii) to a hydrogenation reaction in the presence of hydrogen and a hydrogenation catalyst to produce a saturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound; and (iv) subjecting the saturated C10-C18 oxygen-containing cyclic organic dimer and / or trimer compound produced in step (iii) to a hydrodeoxygenation step in the presence of hydrogen and a hydrodeoxygenation catalyst to produce a hydrocarbon product comprising C10-C18 dialkyl cycloalkanes. The methods of the present invention provide increased yield and reduced manufacturing costs. The C10-C18 dialkyl cycloalkanes produced by the process of the present invention can be used as fuel components in sustainable aviation fuels.

The invention relates to an improved Baeyer-Villiger oxidation process of cyclic ketones to lactones in the presence of oxygen and an aldehyde.

The application discloses a kind of asymmetric C-C link construction method based on new chiral bisoxazoline ligand, it is related to organic chemistry catalytic synthesis technical field.The spiro bisoxazoline compound of chemical structure as shown in formula (I) is used as chiral ligand in the application, and the asymmetric reaction of transition metal salt common catalysis latent chiral nucleophilic substrate and electrophile is generated with the product containing quaternary carbon chiral center.The asymmetric functionalization of the alpha-position of various cyclic ketone esters in the application reaches 97%~99% or more, successfully solves the problem of insufficient selectivity control of traditional ligand to challenging substrate;Catalyst consumption can be reduced to 0.5 mol%, reaches the high activity level of TON more than 200, greatly reduces the cost of precious metal catalytic process;The catalytic system is not only suitable for Michael addition, also suitable for alkylation, arylization reaction, and shows excellent tolerance to aliphatic and aromatic electrophile, provides a general platform for building the chiral center compound containing quaternary carbon of structure diversity.