393 results about "Carboxylic acid halides" patented technology

A composite membrane and method for making the same, comprising a porous support and a polyamide surface. The subject membrane provides improved flux and / or rejection rates. The subject membrane is further capable of operating at lower operating pressures. The subject method includes reacting a polyfunctional amine with a polyfunctional acyl halide to form a polyamide. The method includes the step of contacting a complexing agent with the polyfunctional acyl halide prior substantial reaction between the polyfunctional acyl halide and a polyfunctional amine. The subject process is easily adapted to commercial scale manufacturing processes and is particularly suited for making nanofiltration and reverse osmosis composite membranes.

Disclosed is a polycarbonate composition and process from making same, wherein introduction of a chain terminator and an acyl halide other than phosgene is after at least 25 percent of the hydroxyl groups in the dihydric phenol have been converted to chloroformate groups.

An efficient synthetic route to antiviral 2′,3′-dideoxy-2′,3′-didehydro-nucleosides, such as 2′,3′-dideoxy and 2′- or 3′-deoxyribo-nucleoside analogs, from available precursors is disclosed, with the option of introducing functionality as needed. In one embodiment, a method for the preparation of β-D and β-L-2′,3′-dideoxy-2′,3′-didehydro-nucleosides is described that includes: activating a compound of structure (1) wherein B is a pyrimidine or purine base and Y is O, S or CH2 with an acyl halide of the formula X—C(═O)R1, X—C(═O)C(R1)2OC(═O)R1 or X—C(═O)OR1 (wherein X is a halogen, and each R1 is independently hydrogen, lower alkyl, alkyl, aryl or phenyl); reducing the resulting compound with a reducing agent to form a 2′,3′-dideoxy-2′,3′-didehydro-nucleoside; and optionally deprotecting the nucleoside. The haloacylation of the first step can form the 2′-acyl-3′-halonucleoside, the 3′-acyl-2′-halonucleoside, or a mixture thereof.

A composite semipermeable membrane comprising a porous support membrane on which a separating functional polyamide layer resulting from the polycondensation reaction of polyfunctional aromatic amines with polyfunctional acid halides is formed, wherein the separating functional polyamide layer has carboxy groups, amino groups, phenolic hydroxyl groups, and azo groups, wherein XA, the ratio of the amino groups (molar equivalent of the amino groups / (molar equivalent of the azo groups+molar equivalent of the phenolic hydroxyl groups+molar equivalent of the amino groups)) on a feed water contact surface of the separating functional polyamide layer (an A surface), is in the range 0.5 or less, and XB, the ratio of the amino groups (molar equivalent of the amino groups / (molar equivalent of the azo groups+molar equivalent of the phenolic hydroxyl groups+molar equivalent of the amino groups)) on a permeate-side surface of the separating functional polyamide layer (a B surface), i.e., the opposite side to the A surface, is in the range of 0.5 to 1. The present invention provides a composite semipermeable membrane that achieves a balance between high solute removal properties and a high permeate flow rate and has high organic-solvent resistance, and a method for producing same.

An organically complexed nanocatalyst composition is applied to or mixed with coal prior to or upon introducing the coal into a coal burner in order to catalyze the removal of coal nitrogen from the coal and its conversion into nitrogen gas prior to combustion of the coal. This leads to reduced NOx production during coal combustion. The nanocatalyst compositions include a nanoparticle catalyst that is made using a dispersing agent. The dispersing agent includes at least one functional group such as a hydroxyl, a carboxyl, a carbonyl, an amine, an amide, a nitrile, a nitrogen having a free lone pair of electrons, an amino acid, a thiol, a sulfonic acid, a sulfonyl halide, and an. acyl halide. The dispersing agent forms stable, dispersed, nano-sized catalyst particles. The catalyst composition can be formed as a stable suspension to facilitate storage, transportation and application of the catalyst nanoparticles to a coal material. The catalyst composition can be applied before or after pulverizing the coal material or it may be injected directly into the coal burner together with pulverized coal.

The invention provides aliphatic-aromatic copolyester, a preparation method and application thereof. Polymerization monomers comprise a compound selected from aliphatic dibasic acid, and naphthenic base dibasic acid or the ester, the anhydride and the acyl halide thereof, a compound selected from aromatic dibasic acid or the ester, the anhydride and the acyl halide thereof, a compound simultaneously with two functional groups selected from an amino-group, a mercapto group or a hydroxy or a compound of a derivative of the amino-group, the mercapto group or the hydroxyl with an epoxy group and an azepine ring, a compound selected from unsaturated acid with at least one C-C, C-O, C-N or C-S double bond and C-C or C-N triple bond or the ester, the anhydride and the acyl halide thereof and a compound of unsaturated alcohol with at least one C-C double bond or a C-C triple bond or an epoxide thereof. The aliphatic-aromatic copolyester is prepared by carrying out esterification and polycondensation after mixing the polymerization monomers, polymerizing the double bonds and / or the triple bonds on the polymerization monomers under the action of an initiator and then carrying out a graftingand / or coupling reaction.

The invention which relates to a preparation method of an amphiphilic segmented copolymer belongs to the field of chemical engineering materials. According to the method, polyethylene glycol monomethyl ether with the molecular weight of 200-5000 and alpha-halogenated acyl halide undergo an esterification reaction to obtain a hydrophilic macromolecular initiator; and the segmented copolymer with controllable molecular weight and narrow molecular weight distribution (PDI is equal to or less than 1.5) is obtained by catalyzing ARGET ATRP of a (methyl) acrylic acid ester monomer, a fluorine-containing (methyl)acrylic acid ester monomer or a styrene monomer with the hydrophilic macromolecular initiator as an initiator and a low concentration oxidation state transition metal salt as a catalyst in the presence of an organic reductant. Compared with common atom free radical polymerization methods, the novel atom free radical polymerization method allows the catalyst consumption amount to be less, the sensitivity to a small amount of water and air to be reduced, the obtained polymer to be almost colorless, post-treatment steps to be reduced, even omitted, the production cost to be reduced, and industrialization production requirements to be better satisfied.

A process of making biodiesel from crude tall oil by reacting crude tall oil with a C1-C6 alkanol in the presence of an acid catalyst or by reacting crude tall oil with an acyl halide in the presence of a C1-C6 alkanol. The reaction product of either of these reactions is separated into a suspension liquid by the addition of a polar liquid. The biodiesel product is recovered from the suspension liquid by addition of an organic solvent which produces a polar liquid phase and an organic liquid phase. The biodiesel is recovered from the organic liquid phase by evaporating the organic solvent, which is recovered for use in subsequent separation processes, and vacuum distilling off the product biodiesel from the organic solvent-free organic liquid phase.

Production of carbon nanometer tube composite by sol-gel method is carried out by surface modifying the carbon nanometer tube to obtain acidified carbon nanometer tube by strong acid oxide, reacting acidified carbon nanometer tube with acylating agent to prepare active carbon nanometer tube containing acyl halide perssad, sesquioxosilane with azyl, chlorine, and epoxy etc. active perssad as end group reacting with acidified or acyl halide perssad contained carbon nanometer tube, and obtaining sesquioxosilane stem grafted carbon nanometer tube. Its advantages include good solubility in organic solvent, good dispersiveness to plastic and coating, good compatibility for high performance membrane material, high strength material and wave absorbing material.

A method of preparing a composite membrane module includes preparing a single membrane module to which a hollow fiber support layer is potted; and forming an active layer on a surface of the hollow fiber support layer through interfacial polymerization by bringing a surface of the hollow fiber support layer into contact with a first solution comprising an amine and a second solution comprising an acyl halide (in that order). The method can form an active layer having a uniform thickness and good processability. A composite hollow fiber membrane module prepared by the method exhibits a good salt rejection rate.

The present invention relates to a method for the production of thin film composite membranes by interfacial polymerisation, in particular through the reaction of polyfunctional acyl halides with polyfunctional amines where the polyfunctional acyl halide is applied first to the support medium.

An improved method of synthesizing a macrocyclic tetraamido compound includes protecting the amino portion of an amino carboxylic acid to form a protected amino carboxylic acid; exposing the protected amino carboxylic acid to a first solvent, preferably a hydrocarbon solvent, such as toluene or 1,2-dichloroethane, dichloromethane, dibromomethane and 1,2-dibromoethane. The carboxylic acid portion of the protected amino carboxylic acid is then converted to an activated carboxylic acid by one of esterification or acid halide formation, to form a protected amino activated carboxylic acid derivative. The protected amino activated carboxylic acid derivative is reacted with a diamine in the presence of a second solvent, such as THF or ,2-dichloroethane, dichloromethane, dibromomethane and 1,2-dibromoethane, to form a protected diamide diamine intermediate. Following deprotection, the diamide diamine intermediate is reacted with an activated diacid, such as an activated malonate, oxalate or succinate derivative to form the macrocyclic tetraamido compound. The macrocyclic tetraamido compound may further be complexed with a transition metal.

The invention discloses a phosphorus-nitrogen quaternary ammonium as well as a preparation method and application thereof. The phosphorus-nitrogen quaternary ammonium has a structure shown in the formula (I) and is prepared by the following steps: volution-contained phosphoryl chloride shown in the formula (II) is reacted with diamine compound shown in the formula (III) to obtain a compound shown in the formula (IV); the compound shown in the formula (IV) is reacted with acyl halide shown in the formula (V) to obtain a compound shown in the formula (VI); and the compound shown in the formula (VI) is reacted with tertiary amine shown in the formula (VII) to obtain the product, i.e. the phosphorus-nitrogen quaternary ammonium. The invention is used for chemically modifying montmrillonoid by using the phosphorus-nitrogen quaternary ammonium, improves the inflaming retarding effect to high polymer materials through the cooperative inflaming retarding function of the montmrillonoid and phosphorus-nitrogen fire retardant, reduces the consumption of the fire retardant in the high polymer materials and lowers the cost of fire-retarding materials.

The invention discloses a complex reverse osmosis membrane which comprises a non-woven fabric layer and a polysulfone supporting layer, wherein a crosslinked polyamide layer which uses polyamine and an organic solution containing an acyl halide compound for interfacial synthesis is arranged on the polysulfone supporting layer. In the invention, the polyamine and the organic solution containing the acyl halide are adopted on the polysulfone supporting layer of the prior reverse osmosis membrane to obtain the polyamide layer with a three-dimensional crosslinked structure through interfacial condensation, thus the performance of the complex reverse osmosis membrane is further improved, and the membrane molecules have better compactness and stronger rigidness, wherein the improved compactness can improve the salt rejection rate of the membrane, and the improved rigidness can enable the membrane to have excellent anti-densification performance, thus the rate of decay of the performance of the membrane can be reduced, and the service life of the membrane can be prolonged. Therefore, the complex reverse osmosis membrane has the advantages of high salt rejection rate, large water flux, long service life and obvious reduction of engineering investment and production cost, and can be widely applied to the fields of electricity, metallurgy, petroleum and petrochemical industry, medicine, food, municipal engineering, seawater desalination, and the like.

The present invention relates to a setting retarder for compounds that set hydraulically, containing at least one at least simple adduct and / or condensate, the retarder being produced by the reaction of at least one protein hydrolysate, one pure amino acid, amino acid mixture, and / or the hydrochlorides thereof having at least one mono-, di-, oligo- and / or polycarboxylic acid which is not derived from an amino acid, and / or a carboxylic acid derivative derived therefrom, wherein the carboxylic acid is selected from a group including carboxylic acid anhydrides, carboxylic acid halogenides, and / or carboxylic acid active esters.

The invention relates to a completely biodegradable and highly molecular-weight nanoparticle-containing aliphatic-aromatic copolyester and a preparation method thereof. The aliphatic-aromatic copolyester is prepared from the following poly-monomers: (A) alphatic binary acid or one or more of compounds of ester, acid anhydride and acyl halide; (B) aromatic binary acid, cyclo-alkane binary acid or one or more of ester, acid anhydride and acyl halide compounds; (C) dihydric alcohol, alkamine, aminothiol or one or more of derivatives with epoxy group and azacyclo; and (D) nanoparticles subjected to coupling agent surface treatment. The aliphatic-aromatic copolyester has excellent melt strength and tear-resistant anti-impact properties, the heat-resistant property and the aging-resistant property can be improved. Through addition of nanoparticles, the mechanical performance can be enhanced, the crystallization speed and crystallinity are quickened, and the heat-resistant property and the aging-resistant property are improved.

The present invention belongs to the technical field of industrial catalysis, and provides a method for synthesizing cyclic carbonate through a polyionic liquid nanometer catalysis cycloaddition reaction. According to the method, phosphine functionalized polymer nanoparticles are adopted as a carrier, and is subjected to quaternary phosphorization with a carboxylic acid halide including a carboxylic acid bromide or carboxylic acid chloride so as to obtain a quaternary phosphonium polyionic liquid catalyst, and the cycloaddition reaction is characterized in that CO2 and an epoxide are adopted as reaction substrates to carry out a cycloaddition reaction at a high temperature under a high pressure in the absence of a solvent so as to generate the cyclic carbonate compound. According to the present invention, the separation of the product and the catalyst can be achieved through the simple method, the catalyst can present the high catalysis activity and the high selectivity, and the stability and the reproducibility of the catalysis activity can be easily improved through the regular structure morphology; and the green approach for cyclic carbonate synthesis through the nano-scale polyionic liquid catalysis is provided.

The invention discloses a reaction type phosphorus / nitrogen flame retardant, and its preparation method and application. A structure of the reaction type phosphorus / nitrogen flame retardant is shown in the formula (I). The preparation method of the reaction type phosphorus / nitrogen flame retardant comprises the following steps that: a phosphaspiro-containing amine compound shown in the formula (II) and a carboxylic acid halide shown in the formula (III) undergo a reaction or the phosphaspiro-containing amine compound shown in the formula (II) and a carboxylic acid shown in the formula (IV) undergo a reaction to obtain the reaction type phosphorus / nitrogen flame retardant. In the invention, a copolymer is produced from a reaction type phosphorus / nitrogen flame retardant and monomers and is utilized for modifying high-molecular materials in a fire retardant characteristic, and through synergistic effects of nitrogen and phosphorus elements in the phosphorus / nitrogen flame retardant, flame retardant effects of high-molecular materials adopting the phosphorus / nitrogen flame retardant can be improved, thus a usage amount of the phosphorus / nitrogen flame retardant in the high-molecular materials is decreased and a cost of the high-molecular materials with a flame retardant characteristic is reduced.

The invention relates to a modified polyphenylene ether resin, a thermosetting resin composition and application thereof. The modified polyphenylene ether resin has a resin structure obtained by reacting a low-molecular-weight dihydroxy-terminated polyphenylene ether represented by formula (1-1) with a diacyl halide or dicarboxylic acid containing a structural unit represented by formula (1-2), amonofunctional aromatic phenol or a monofunctional aromatic acyl halide or a monofunctional aromatic carboxylic acid. The thermosetting resin composition contains, as essential components, an epoxy resin and the modified polyphenylene ether resin. The invention also provides application of the thermosetting resin composition in prepregs, circuit boards and laminated films. The prepreg, the circuitsubstrate and the laminated film prepared from the thermosetting resin composition provided by the invention have the advantages of low dielectric constant, low tangent of dielectric loss angle highglass transition temperature, excellent heat resistance, excellent wet heat resistance, low hygroscopicity and good binding force with metal.

The invention discloses a star-like amphoteric polycarboxylate superplasticizer with efficient anti-mudding function and a preparation method thereof; the preparation method comprises: esterifying Beta-cyclodextrin and a dithioester compound with acyl halide groups to obtain star-structure reversible addition-fragmentation chain transfer agent (RAFT agent), initiating RAFT polymerization of (methyl)polyethylene glycol diacrylate, (methyl)acrylic acid and (methyl)acryloyloxyethyl trimethyl ammonium chloride under the action of the chain transfer agent and an initiator to obtain star-like amphoteric copolymer, and carrying out further processing to obtain the star-like amphoteric polycarboxylate superplasticizer having a solid content of 20% and efficient anti-mudding function. The polycarboxylate superplasticizer prepared herein has high water-reducing rate and efficient ant-mudding function and may meet high construction requirements.

A catalyst manufacturing process includes heat treating an intermediate catalyst composition that includes catalyst nanoparticles having catalyst atoms in a non-zero oxidation state bonded to a dispersing / anchoring agent. The catalyst nanoparticles are formed using a dispersing agent having at least one functional group selected from the group of a hydroxyl, a carboxyl, a carbonyl, an amide, an amine, a thiol, a sulfonic acid, sulfonyl halide, an acyl halide, an organometallic complex, and combinations of these. The dispersing agent can be used to form single- or multicomponent supported nanocatalysts. The dispersing agent also acts as an anchoring agent to firmly bond the nanocatalyst to a support. Performing the heat treating process in an inert or oxidative environment to maintain the catalyst atoms in a non-zero oxidation helps maintains a stronger bonding interaction between the dispersing agent and the catalyst atoms. This, in turn, increases the dispersion and / or distribution of catalyst components throughout the supported catalyst.

The present invention belongs to the material technology field, in particular relates to a preparation method of carbon nano tube decorated by amphiphilic block copolymer. The detail steps are that the double bonds are led into the surface of the carbon nano tube by making use of a hydroxylation carbon nano tube and any of acyl chloride, anhydride or amide with double bonds; a water-soluble polymer macromolecular initiator, the end group of which is provided with atom transfer radical polymerization initiating groups is composed by making use of signal hydroxyl terminated water-soluble polyether and alpha-halogenated acyl halide and then a hydrophobic monomer is initiated to carry through ATRP reaction. One end of the amphiphilic block copolymer acquired is a halogen atom; reactions are carried through on the amphiphilic block copolymer the end group of which is the halogen atom and the nano tube with double bonds on the surface thereby grafting the polymer on the surface of the carbon nano tube. The invention makes use of an atom transfer addition method to carry through polymer graft on the carbon nano tube and avoids the damage to the carbon nano tube wall and carbon nano tube cutting caused by acid treatment thereby being able to acquire a water-soluble full carbon nanon tube.

The invention relates to methods of preparing nicotinamide riboside and derivatives thereof. In an aspect, the invention relates to a method of preparing a compound of formula (I), wherein n is 0 or 1; m is 0 or 1; Y is O or S; R1 is selected from H, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted primary or secondary amino, and substituted or unsubstituted azido; R2-R5, which may be the same or different, are each independently selected from H, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl, and substituted or unsubstituted aryl; and X− is an anion, selected from an anion of a substituted or unsubstituted carboxylic acid, a halide, a substituted or unsubstituted sulfonate, a substituted or unsubstituted phosphate, a substituted or unsubstituted sulfate, a substituted or unsubstituted carbonate, and a substituted or unsubstituted carbamate.

The present invention comprises a method of synthesizing compounds having the formula (I): wherein: Z, R1, R2, R3, R4 and R8 are defined herein, which comprises the steps of (a) reacting a compound of the formula (II) wherein Q is a halogen, with an effective amount of a compound selected from the group consisting of an acid anhydride or an acid halide; to form a compound of the formula (III) b) transforming the 6-halo group of said compound (III) to an amine by displacement with ammonia to form compound (IV) (c) reacting said compound (IV) with a base to cause cyclization to a 6-halo intermediate, said 6-halo group is then transformed to an amine by displacement with an amine to form compound (V) (d) reacting said compound (V) with an effective amount of compound (VI) wherein X is a halogen; to form the compound of formula (I).

The present invention is generally directed to triester-based lubricant compositions. The present invention is also directed to methods of making these and other similar lubricant compositions. In some embodiments, the methods for making such triester-based lubricants utilize a biomass precursor comprising mono-unsaturated fatty acids, wherein such mono-unsaturated fatty acids are reduced to mono-unsaturated fatty alcohols en route to the synthesis of triester species for use as / in the triester-based lubricant compositions. Subsequent steps in such synthesis may employ carboxylic acids and / or acyl halides / anhydrides derived from biomass and / or Fischer-Tropsch synthesis.

The invention provides a method for preparing a nanofiltration membrane with high desalination selectivity and high flux. The method comprises the following steps: S10, preparation of an aqueous phase solution and an organic phase solution, wherein the aqueous phase solution containing multifunctional polyamines, reactive hydroxyl polymer and hydrophilic polymer salt, and the organic phase solution of polyfunctional acyl chloride with at least two reactive acyl halide groups are prepared; S20, interfacial polymerization reaction, wherein an ultrafiltration diaphragm is fixed on a glass plate, then the aqueous phase solution is poured onto the surface of the ultrafiltration diaphragm, and is poured away after placed for 10-30s, the organic phase solution is poured onto the surface of the ultrafiltration diaphragm after the aqueous phase solution on the surface of the diaphragm is dry, and poured away after placed for 10-30s, the ultrafiltration diaphragm is then placed in an oven at a temperature of 40-120 DEG C for thermal treatment, and a finished product is obtained. The method for preparing the nanofiltration membrane has the advantages that while the water flux of the nanofiltration membrane is improved, the desalination selectivity of the nanofiltration membrane is expanded to a relatively large extent.

This invention discloses a method for preparing polystyrene resin containing double bonds, which is prepared from linear or crosslinked polystyrene resin or polystyrene copolymer, and acyl halide reagent containing double bonds via Friedel-Crafts acylation reaction. The double bonds thus derived can react with double bonds of other functional monomers to introduce functional groups onto the resin, thus widening the application range of the resin. The double bond content of the polystyrene resin is up to 0-5.50 mmol / g dry resin.

The present invention provides a method of manufacturing an aromatic polyamide composite membrane comprising: coating an aqueous solution containing polyfunctional aromatic amine to a porous polymer substrate; and reacting the coated substrate with an organic solution containing polyfunctional aromatic acyl halide to lead to interfacial condensation polymerization between the polyfunctional aromatic amine and the polyfunctional aromatic acyl halide so that the reaction product resulting from the interfacial condensation polymerization is coated on the surface of the substrate, characterized in that either of the aqueous solution containing polyfunctional aromatic amine or the organic solution containing polyfunctional aromatic acyl halide has dendritic polymer as one of polyfunctional compounds added thereto. The resulting aromatic polyamide composite membrane which includes dendrimer as polyfunctional compound, exhibits high salt rejection rate and water flux.

The present invention includes a method for analyzing reactions. The method includes the steps of providing a solution of at least one acceptor chemical and at least one donor chemical. The donor chemical is capable of donating a chemical moiety to the acceptor chemical. The solution further includes at least one controller chemical that affects the reaction between the donor chemical and the acceptor chemical. The solution is then incubated so that a portion of the acceptor chemical reacts with the donor chemical to form an acceptor product. Unreacted donor chemical is separated from the acceptor product. The acceptor product or the donor chemical is then measured using X-ray fluorescence. Another aspect of the present invention includes a method for analyzing protein function. The method includes the steps of providing a solution of at least one acceptor chemical and at least one donor chemical. The donor chemical is capable of donating a chemical moiety to the acceptor chemical. The donor chemical includes a functional group selected from ester, anhydride, imide, acyl halide, and amide. The solution is then incubated so that a portion of the acceptor chemical reacts with the donor chemical to form an acceptor product. Unreacted donor chemical is separated from the acceptor product. The acceptor product or the donor chemical is then measured using X-ray fluorescence. Yet another aspect of the present invention includes a method for analyzing protein function. The method includes the steps of providing a solution of at least one acceptor chemical and at least one donor chemical. The solution is then incubated so that a portion of the acceptor chemical reacts with the donor chemical to form an acceptor product. Unreacted donor chemical is separated from the acceptor product. The acceptor product or the donor chemical is then measured using X-ray fluorescence. An additional analytical method is also used to measure either the acceptor product or the donor chemical.