10 results about "Tetrachloroethane" patented technology

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 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.

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).

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 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.