18 results about "Tetrachloroethane" patented technology

The invention discloses a preparation method of 1-methoxy-2-trifluoromethoxyethane, an electrolyte, a battery and a power utilization device, and relates to the technical field of batteries, the preparation method of 1-methoxy-2-trifluoromethoxyethane comprises the following steps: reacting an intermediate, dibromohydantoin and hydrogen fluoride pyridine in tetrachloroethane to obtain 1-methoxy-2-trifluoromethoxyethane; the 1-methoxy-2-trifluoromethoxyethane is subjected to a reaction to obtain the 1-methoxy-2-trifluoromethoxyethane; wherein the structural formula of the intermediate is shown in the specification. According to the preparation method of the 1-methoxy-2-trifluoromethoxyethane provided by the invention, the 1-methoxy-2-trifluoromethoxyethane can be produced, and the 1-methoxy-2-trifluoromethoxyethane can be used in an electrolyte to improve the oxidation resistance of the electrolyte.

The present invention provides a resin composition having excellent spinnability and dyeability.　Provided is a resin composition comprising a propylene-based polymer A, an ester-based polymer B, and a compound C, wherein: the propylene-based polymer A has a Z-average molecular weight (Mz) of 600,000-750,000; the ester-based polymer B has (i) a heat of fusion of not less than 0 J / g but less than 35 J / g as obtained by differential scanning calorimetry and (ii) a limiting viscosity (IV) of 0.40-1.00 dl / g as measured in a liquid mixture of tetrachloroethane and phenol at 20°C; and the compound C has at least one group selected from the group consisting of heterocyclic groups having two or more heteroatoms, cyclic ether groups, acid anhydride groups, isocyanate groups, and carbodiimide groups.

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthetic method of a chlorinated alcohol compound. The method comprises the following steps: adding an acetonitrile solution of a compound 1 into 1, 1, 2, 2-tetrachloroethane in a nitrogen atmosphere, then adding tert-butyl hydroperoxide, alkali and trimethylsilyl cyanide, stirring at room temperature, heating, stirring and reacting, removing a solvent under reduced pressure after the reaction is completed, and then performing silica gel column chromatography on a crude product to obtain a product, namely the chlorohydrin compound. According to the synthesis method disclosed by the invention, by regulating and controlling reaction conditions and optimizing raw material selection, the yield of the chlorinated alcohol compound is effectively improved, the atom economy is improved, the raw materials are efficiently utilized, and the emission of wastes is reduced.

The invention discloses a method for testing the gel content of a cable insulation material, and relates to the field of material detection. The method comprises the following steps: crushing a sample to be detected, weighing, and recording as W1; after a solvent is added, heating treatment is carried out, and the heating temperature is 90-115 DEG C; the solvent comprises xylene and tetrachloroethane; taking out, drying, cooling, weighing, and recording as W2; and then calculating the gel content of the sample. According to the method, the solvent containing xylene and tetrachloroethane is adopted to extract the to-be-detected sample under a high-temperature condition, the non-uncrosslinked part of the cable insulation material is completely dissolved by using the xylene non-polar solvent, and the polar chain segment is effectively extracted by using the tetrachloroethane polar solvent, so that the affinity and the swelling rate of the solvent to the cable insulation material are improved; aiming at a cable insulation material grafted or copolymerized with polar groups, the accuracy of testing the gel content can be effectively improved.

The object of the present invention is to provide a polyester that can be manufactured from biomass-derived raw materials and has excellent heat resistance, gas barrier properties, and blow moldability, a polyester composition containing the same, and a bottle using the same that has excellent heat resistance, gas barrier properties, and impact resistance. [Solution] A polyethylene furanoate having an intrinsic viscosity of 0.95 dl / g or more and 1.50 dl / g or less. However, the intrinsic viscosity is measured at 30°C using an Ubbelohde viscometer after dissolving 0.25 g of the polyethylene furanoate in 50 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 50 / 50 (weight ratio) (Huggins constant is assumed to be 0.32).

The application discloses a dehydrochlorination catalyst and a preparation method and application thereof in synthesis of 1,1,2-trichloroethylene from 1,1,2,2-tetrachloroethane. The preparation method of the dehydrochlorination catalyst comprises the following steps: A1, pretreating activated carbon with acid or alkali to obtain pretreated activated carbon; A2, adding a pore-forming agent to the activated carbon, and then performing high-temperature calcination after standing; A3, preparing a metal salt aqueous solution, taking the activated carbon and adding the same into the metal salt aqueous solution, and then performing room-temperature impregnation to obtain a product; subsequently, performing freeze-drying to obtain the product; A4, placing the product in the step A3 into a tubular furnace, introducing a reducing gas containing hydrogen to reduce the metal salt into metal elements, and then introducing HCl gas to react with the metal elements to generate metal chlorides, so that the dehydrochlorination catalyst is obtained. The application further provides application of the dehydrochlorination catalyst in synthesis of 1,1,2-trichloroethylene from 1,1,2,2-tetrachloroethane, and the dehydrochlorination catalyst has good catalytic activity and stability.

The invention discloses a multi-stage control method for co-producing trichloroethylene and tetrachloroethylene by cracking tetrachloroethane. The multi-stage control method comprises the following steps: S1, preheating a tetrachloroethane raw material to 250-300 DEG C; s2, mixing the preheated tetrachloroethane and chlorine according to a molar ratio of (15-11): 1; s3, the mixed materials are introduced into a first tubular reactor, a first-stage cracking reaction is carried out under the radiation heating and convection heating composite heat supply condition, the reaction pressure is controlled to range from 0 KPa to 100 KPa, the reaction temperature is controlled to range from 380 DEG C to 450 DEG C, and an intermediate product containing trichloroethylene and tetrachloroethylene is generated. The contradiction that the conversion rate and the selectivity in a single-section reactor are difficult to collaboratively optimize is effectively overcome, and the total yield of a target product is greatly improved; by introducing a real-time online monitoring and feedback linkage regulation and control mechanism, accurate and flexible control of the generation proportion of tetrachloroethylene is realized, and the response capability of the process to the market demand is enhanced.

The invention provides a preparation and valuing method of a 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance, and the preparation method of the 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance comprises the following steps: 1, selecting a mother solution and a deuterated reagent; and 2, preparing the 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance. The invention relates to a preparation method of a 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance, and a valuing method of the 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance prepared by the preparation method of the 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance specifically comprises the following steps: step 1, sub-packaging and packaging; step 2, carrying out uniformity inspection; step 3, stability inspection; and step 4, uncertainty evaluation. The 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance for superconducting nuclear magnetic resonance quantification, provided by the invention, is a solution standard substance in which the content of 1, 1, 2, 2-tetrachloroethane ranges from 0.05% to 0.5%. The 1, 1, 2, 2-tetrachloroethane deuterated solution standard substance is used, so that the test steps of superconducting nuclear magnetic resonance quantification can be reduced, and the measurement uncertainty is reduced.

The application relates to the field of release films, and discloses an industrial high-temperature-resistant release film and a preparation method thereof. The release film comprises a composite base film and a release layer, and the composite base film is prepared by coating a coating liquid on a polyimide nanofiber film; the coating liquid is prepared from phenol, tetrachloroethane, polyethylene terephthalate particles, modified silica microspheres and antioxidant tetra[beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester; the modified silica microspheres are prepared from anhydrous ethanol, gamma-aminopropyl triethoxysilane, an ammonia solution and tetraethyl orthosilicate; the polyimide nanofiber film is prepared from 4,4'-diamino diphenyl ether, N,N-dimethylacetamide and pyromellitic dianhydride; and the release layer is prepared from vinyl silicone oil, hydrogen-containing silicone oil, a platinum gold catalyst, inhibitor ethynylcyclohexanol and a toluene solvent. The release film has good mechanical properties and temperature resistance.

The present invention relates to a polyester composition comprising: (1) at least one polyester comprising: (a) a dicarboxylic acid component comprising: (i) from about 70 mol% to about 100 mol% residues of terephthalic acid or an ester thereof; (ii) from about 0 mol% to about 30 mol% of an aromatic or aliphatic dicarboxylic acid residue having up to 20 carbon atoms, or a combination thereof; (b) a diol component comprising: (i) from about 50 mol% to about 100 mol% ethylene glycol residues; (ii) from about 0 mol% to about 50 mol% of a modified diol residue comprising a linear residue or alicyclic residue comprising from 2 to 20 carbon atoms; wherein the total mole% of the dicarboxylic acid component is 100 mole%, and wherein the total mole% of the diol component is 100 mole%; and (2) a residue of a single metal catalyst system consisting essentially of germanium atoms in an amount of less than 75 ppm relative to the mass of the final polyester prepared; and wherein the final polyester has an intrinsic viscosity of from 0.45 dL / g to 1.2 dL / g, as determined at 25 DEG C at a concentration of 0.5 g / 100 ml in 60 / 40 (weight / weight) phenol / tetrachloroethane.

A polyethylene furanoate having an intrinsic viscosity of 0.95 dl / g or more and 1.50 dl / g or less. Herein, the intrinsic viscosity is measured by dissolving 0.25 g of the polyethylene furanoate in 50 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 50 / 50 (weight ratio) using an Ubbelohde viscometer at 30°C (Huggins constant is set to 0.32).

A method for separating R22 and HFP includes a mixing step of obtaining a mixture for extraction which is a mixture of a first mixture including R22 and HFP and an extraction solvent including at least one chlorine-containing compound selected from the group consisting of methylene chloride, chloroform, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1,1,2-tetrachloroethane, 1,1,2,2-tetrachloroethane, pentachloroethane, hexachloroethane, trichloroethylene, and tetrachloroethylene, and an extraction distillation step of distilling the mixture for extraction to respectively obtain a first distillate including HFP as a main component, and a first bottom product including the extraction solvent as a main component and including R22.

The present application relates to the technical field of chlorinated alkene preparation, and particularly relates to a preparation method of 1,2-dichloroethylene. The present application is characterized in that acetylene and tetrachloroethane are reacted under the action of a catalyst to generate 1,2-dichloroethylene; the catalyst comprises a metal ruthenium catalyst supported on titanium dioxide; and the loading amount of the metal ruthenium in the catalyst is 0.5-5 wt%. The present application is characterized in that acetylene and tetrachloroethane are reacted under the action of a metal ruthenium catalyst supported on titanium dioxide to generate 1,2-dichloroethylene. The reaction is simple, the raw materials are widely available and inexpensive, the production cost is low, there is no three-waste emission, the operation is safe, and the present application is a clean production process. In addition, the raw materials used in the present application are acetylene and tetrachloroethane, so the atomic economy of the reaction is also high, which is conducive to the implementation and application of the reaction in industry.

This invention discloses a method for reducing the content of monosubstituted difluorophosphate-based lithium trifluoroborate in a mixture. The method includes the following steps: (1) obtaining a concentrated mixture; (2) adding an organic solvent to the concentrated mixture, maintaining the temperature at -60℃ to 20℃ for 0.5h to 144h to precipitate crystals, filtering, and obtaining a solution of disubstituted difluorophosphate-based lithium trifluoroborate; wherein the organic solvent is selected from at least one of dichloromethane, trichloromethane, tetrachloroethane, isopropanol, methyl tert-butyl ether, butyl acetate, and toluene. This invention has the advantages of simple operation and the ability to freely control the content of disubstituted difluorophosphate-based lithium trifluoroborate and monosubstituted difluorophosphate-based lithium trifluoroborate in the product.

This polyethylene furanoate has an intrinsic viscosity of 0.95-1.50 dl / g. Said intrinsic viscosity is measured (the Huggins constant is defined as 0.32) at 30° C. by using an Ubbelohde viscometer, after dissolving 0.25 g of the polyethylene furanoate in 50 ml of a solvent mixture of phenol / 1,1,2,2-tetrachloroethane=50 / 50 (weight ratio).

The present invention discloses a method for producing environmentally friendly tetrachloroethane, which relates to the field of chemical synthesis technology. The method comprises acetylene pretreatment: deep purification by alkaline washing and MCM-41 nano-adsorbent; chlorination reaction: using C4-C8 alkyl-substituted imidazole ionic liquid as the reaction medium, catalyzing the reaction of acetylene and chlorine at 80-120°C and 0.05-0.1MPa; multi-stage distillation: using a combined atmospheric-vacuum distillation process; tail gas treatment: using amino-functionalized ionic liquid to enrich pollutants, which are then recycled after vacuum distillation and anion exchange column regeneration, with an ionic liquid recovery rate of ≥95%; and wastewater treatment: a microbial fuel cell system achieves efficient COD removal. The present invention significantly improves product purity and production efficiency, reduces energy consumption, and promotes the green and efficient production of tetrachloroethane through ionic liquid design.

To provide a resin composition having excellent spinnability and dyeability.SOLUTION: There is provided a resin composition comprising a propylene-based polymer A, an ester-based polymer B and a compound C, wherein the propylene-based polymer A has a Z-average molecular weight (Mz) of 600000 or more and 750000 or less, the ester-based polymer B has (i) a heat of fusion of 0 or more and less than 35 J / g as obtained by differential scanning calorimetry and (ii) an intrinsic viscosity (IV) of 0.40 or more and 1.00 dl / g or less as measured in a liquid mixture of phenol and tetrachloroethane at 20°C and the compound C is a compound having at least one group selected from the group consisting of a heterocyclic group having two or more heteroatoms, a cyclic ether group, an acid anhydride group, an isocyanate group and a carbodiimide group.SELECTED DRAWING: None

The invention relates to the field of release films, and discloses an industrial high-temperature-resistant release film and a preparation method thereof.The release film comprises a composite base film and a release layer, and the composite base film is prepared by coating a polyimide nanofiber film with coating liquid; the coating liquid is prepared from phenol, tetrachloroethane, polyethylene glycol terephthalate particles, modified silicon dioxide microspheres and an antioxidant tetra [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester; the modified silicon dioxide microspheres are prepared from absolute ethyl alcohol, gamma-aminopropyltriethoxysilane, an ammonia water solution and tetraethoxysilane; the polyimide nanofiber membrane is prepared from 4, 4 '-diaminodiphenyl ether, N, N-dimethylacetamide and pyromellitic dianhydride, and the release layer is prepared from vinyl silicone oil, hydrogen-containing silicone oil, a platinum catalyst, an inhibitor ethynyl cyclohexanol and a toluene solvent. The release film provided by the invention has good mechanical properties and temperature resistance.