10 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 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 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 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.

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 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.