16 results about "Chlorinated solvents" patented technology

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to trifluoropyruvic acid and a method for preparing trifluoropyruvic acid from trifluoroacetone. The method comprises the following steps: dissolving trifluoroacetone in a chlorinated solvent, adding a catalyst, introducing chlorine, carrying out a closed reaction, controlling the reaction temperature, cooling to room temperature after the reaction is finished to obtain a 1, 1, 1-trichlorotrifluoroacetone reaction mixture, adding an alkali liquor to carry out a hydrolysis reaction, separating out a water phase after the reaction is finished, and drying to obtain the trifluoropyruvic acid. And continuously applying the chlorination solvent, continuously adding the acid into the water phase to adjust the pH value to 3-4 to obtain a trifluoropyruvic acid water solution, finally extracting and pulping to obtain a wet trifluoropyruvic acid product, and purging with air to obtain a pure trifluoropyruvic acid product. According to the method for preparing trifluoropyruvic acid from trifluoroacetone, the raw materials are easy to obtain, the process is stable, the yield is high, the cost is low, and the invention further provides a trifluoropyruvic acid product.

The invention provides a method for preparing a storage-resistant water-insoluble isothiazolinone, and belongs to the technical field of chemical synthesis. The invention first uses N,N'-di-n-octyl dithiodipropionamide, a chlorinated solvent and chlorine as raw materials for chlorination reaction to prepare 2-n-octyl isothiazolin-3-ketone OIT and / or 4,5-dichloro-2-n-octyl isothiazolin-3-ketone DCOIT finished products with less impurity content, thereby reducing the discoloration reaction caused by impurities; the product is then mixed with a stabilizer, and the inhibitory effect of the stabilizer on the free radical discoloration process is utilized to finally obtain a storage-resistant water-insoluble isothiazolinone, thereby solving the problem of discoloration of the water-insoluble isothiazolinone during storage.

The application belongs to the technical field of secondary batteries, and more particularly relates to a low-temperature microemulsion electrolyte, a preparation method and application thereof. The low-temperature microemulsion electrolyte comprises an electrolyte salt, a symmetrical cyclic ether solvent, a highly chlorinated solvent insoluble in the symmetrical cyclic ether solvent, and a chlorinated ether solvent for dispersing the highly chlorinated solvent in the symmetrical cyclic ether solvent in the form of micelles. Through synergistic effect of the components, an electrolyte system with high ion conductivity, electrode interface stability and wide temperature range adaptability is constructed, effectively solving the core problems of kinetic sluggishness, poor interface stability and short cycle life of the secondary battery in an ultra-low temperature environment. The electrolyte remains liquid at -70 DEG C, and exhibits excellent cycle stability in a wide temperature range of -40 DEG C to 25 DEG C, giving the battery excellent wide temperature range adaptability, breaking the low-temperature performance bottleneck of the secondary battery, and having a broad application prospect.

The invention discloses a sulfonated calix [4] arene derivative and application thereof in resisting I-type herpes simplex virus (HSV-1), and belongs to the field of biological medicine. The invention relates to a sulfonated calix [4] arene derivative, which has a structural general formula as follows: R is equal to The preparation method comprises the following steps: adding sodium hydride into a raw material C4A in a polar aprotic solvent to react with alkyl halide to obtain a C4AH or C4AD intermediate; and reacting the intermediate with chlorosulfonic acid in a chlorine-containing solvent, and adding an alkaline alcohol solvent for treatment to obtain the sulfonated calix [4] arene derivative. The calix [4] arene derivative has a relatively good inhibition rate on expression of HSV-1gB and gD genes, and does not have obvious cytotoxicity.

The invention provides a modified ultra-high molecular weight polyethylene fiber and a modification method thereof.The modification method comprises the steps that firstly, an ultra-high molecular weight polyethylene fiber raw material is pretreated, and then the pretreated ultra-high molecular weight polyethylene fiber and a chlorination solvent are put into a chlorination kettle to be subjected to chlorination reaction treatment, and finally, putting the chlorinated ultra-high molecular weight polyethylene fiber, a catalyst, a grafting monomer and deionized water into a grafting kettle, carrying out grafting reaction treatment, and cleaning and drying to obtain the ultra-high molecular weight polyethylene fiber. According to the modified ultra-high molecular weight polyethylene fiber and the modification method thereof provided by the invention, on the basis of not damaging the structure of the UHMWPE fiber and not reducing the mechanical property of the UHMWPE fiber, abundant amino groups and hydroxyl groups are chemically bonded on the surface of a polyethylene material, and the interface interaction between the polyethylene material and a resin material is improved, so that the modified ultra-high molecular weight polyethylene fiber is easily combined with the resin material to form a composite material.

The application belongs to the technical field of organic semiconductor materials, and particularly relates to an intrinsic low-melting-point polymer semiconductor material and a preparation method and application thereof. The polymer semiconductor material is a pyrrolopyrroloquinoline intrinsic low-melting-point polymer with a macrocyclic crown ether as a side chain. The application reduces the melting point of an existing organic polymer by introducing the macrocyclic crown ether into the side chain. The polymer provided by the application can be used to obtain a high-orientation semiconductor thin film through a melt friction transfer method, and the semiconductor thin film can be used as an organic semiconductor layer in an organic field effect transistor to obtain a new organic field effect transistor. The carrier mobility of the organic field effect transistor is improved by regulating a molecular packing mode. The application provides a feasible method for solvent-free processing of an organic field effect transistor device, which will help to solve the environmental pollution problem caused by traditional solution processing using a chlorinated solvent.

Described herein is a method including (I) forming a first mixture including: an ionomer including at least one pendant -SO3M group, where M is selected from H, alkali metals, alkaline-earth metals, and combinations thereof; a chlorination reagent; and a chlorination solvent; (II) reacting the first mixture to produce an at least partially chlorinated ionomer including at least one pendant -SO2Cl group; (III) forming a second mixture including: the at least partially chlorinated ionomer including at least one pendant -SO2Cl group; a fluorination reagent; and optionally a fluorination solvent; and (IV) reacting the second mixture to produce a sulfonyl fluoride-containing polymer including at least one pendant -SO2F group. The method is useful for recycling ionomers.

A system for environmental remediation of halogenated compounds such as chlorinated solvents is presented, the system comprising at least one bacterial strain capable of microbial chain elongation; at least one bacterial strain capable of reductive dehalogenation; and an alcohol. Also presented is a method remediating an environmental sample, the method comprising the steps of: providing a remediation composition; and treating an environmental sample comprising at least one chlorinated pollutant with the remediation composition; wherein the remediation composition comprises at least one bacterial strain capable of microbial chain elongation; at least one bacterial strain capable of reductive dehalogenation; and at least one bacterial strain capable of fermentation.

This invention belongs to the field of organic chemical preparation technology, specifically relating to trifluoropyruvate and a method for preparing trifluoropyruvate from trifluoroacetone. The method for preparing trifluoropyruvate from trifluoroacetone according to this invention involves: firstly, dissolving trifluoroacetone in a chlorinating solvent, then adding a catalyst, introducing chlorine gas, and sealing the reaction, controlling the reaction temperature, and cooling to room temperature after the reaction to obtain a 1,1,1-trichlorotrifluoroacetone reaction mixture. An alkaline solution is added to initiate a hydrolysis reaction. After the reaction, the aqueous phase is separated, and the chlorinating solvent is reused. Acid is added to the aqueous phase to adjust the pH to 3-4 to obtain an aqueous trifluoropyruvate solution. Finally, extraction and slurrying are performed to obtain wet trifluoropyruvate, which is then purged with air to obtain pure trifluoropyruvate. The method for preparing trifluoropyruvate from trifluoroacetone provided by this invention uses readily available raw materials, has a stable process, high yield, and low cost. This invention also provides a trifluoropyruvate product.

The present invention discloses a method for producing a concentrated extract having a chlorogenic acid content of 70-80% from dried coffee beans wherein the method comprises the following extraction and purification steps: i. Powdering the dried coffee beans; ii, adding the same amount of water, and stirring for 4 hours at the temperature of 45-55 DEG C; iii, adding a polar solvent ethyl acetate of which the polarity is lower than that of alcohol in an amount which is 4 times that of the raw materials, and stirring at 50-55 DEG C until the extraction is completed; iv. Separating and drying the solvent layer to obtain a dry substance, then purifying the dry substance by dissolving the dry substance in water and washing with a chlorinated solvent such as chloroform or dichloromethane to remove caffeine; and v, evaporating the water to obtain the dry powder extract, wherein the content of chlorogenic acid is 70-80%. The extract has stronger capabilities of quenching oxidative stress and destroying free radicals.

The invention belongs to the technical field of secondary batteries, and particularly relates to a low-temperature microemulsion electrolyte and a preparation method and application thereof. The low-temperature microemulsion electrolyte comprises an electrolyte salt, a symmetric cyclic ether solvent, a highly chlorinated solvent insoluble in the symmetric cyclic ether solvent, and a chlorinated ether solvent for dispersing the highly chlorinated solvent in the symmetric cyclic ether solvent in the form of micelles. Through the synergistic effect of all the components, an electrolyte system with high ionic conductivity, electrode interface stability and wide temperature range adaptability is constructed, and the core problems that a secondary battery is slow in dynamics, poor in interface stability and short in cycle life in an ultralow-temperature environment are effectively solved. The electrolyte is still kept in a liquid state at-70 DEG C, shows excellent cycle stability in a wide temperature range of-40 DEG C to 25 DEG C, endows the battery with excellent wide temperature range adaptive capacity, breaks through the low-temperature performance bottleneck of the secondary battery, and has wide application prospects.

The present invention relates to (i) a spin fluid for flash spinning comprising (a) at least one polyolefin, and (b) a spin agent comprising at least one chlorinated solvent and at least one linear or branched hydrocarbon with 5 to 6 carbon atoms, and (ii) a process for the preparation of plexifilamentary fibrils of polyolefins using the spin fluid.

A method for dechlorinating a starting chlorinated polymer includes a step of contacting the starting chlorinated polymer with a solution that includes a cation initiator, an organosilane, and chlorinated solvent at a predetermined temperature for a sufficient time to at least partially dechlorinate the starting chlorinated polymer. Complete or partial dechlorination can be achieved depending on the reaction conditions. A block copolymer formed by the method is also provided.

The present invention relates to (i) a spin fluid for flash spinning comprising (a) at least one partially fluorinated polymer and (b) a spin agent comprising at least one chlorinated solvent and at least one linear or branched hydrocarbon with 5 or more carbon atoms, and (ii) a process for the preparation of plexifilamentary fibrils of partially fluorinated polymers using the spin fluid.

The invention belongs to the technical field of organic semiconductor materials, and particularly relates to an intrinsic low-melting-point polymer semiconductor material as well as a preparation method and application thereof. The polymer semiconductor material disclosed by the invention is a diketopyrrolopyrrole intrinsic low-melting-point polymer taking macrocyclic crown ether as a side chain. Macrocyclic crown ether is introduced into a side chain, so that the melting point of the existing organic polymer is reduced. The polymer provided by the invention can be used for preparing a high-orientation semiconductor film through a melting friction transfer method, and the semiconductor film can be used as an organic semiconductor layer in an organic field effect transistor to obtain a new organic field effect transistor; the carrier mobility of the organic field effect transistor is improved by regulating and controlling a molecular accumulation mode. The invention provides a feasible method for solvent-free processing of organic field effect transistor devices, which is helpful for solving the problem of environmental pollution caused by processing by a traditional solution method using a chlorinated solvent.

The invention belongs to the technical field of adhesives, and particularly relates to a cold bonding adhesive, a bonding assembly and application and a preparation method of the cold bonding adhesive, the cold bonding adhesive comprises a solid component and a solvent, and the solvent does not contain monomer isocyanate and / or does not contain a chlorinated solvent; the solid component includes a first halogenated polymer elastomer, a second halogenated polymer elastomer, and an adhesion promoter. The cold bonding adhesive provided by the invention does not contain monomer isocyanate and / or a chlorinated solvent, is environment-friendly, and can provide good adhesive force.