32 results about "Iodine bromide" patented technology

The invention relates to a method for preparing 2-methoxy-4-amino-5-ethysulfonyl benzoic acid methyl ester by halogen halogenation. According to the invention, 2-methoxy-4-acetyl methyl anthranilate is subjected to halogen halogenation (chlorination, bromination or iodization) and then is condensed with sodium ethanesulfinate to obtain a target product. The method has the advantages that the process route is simple, the product yield is high, the total yield reaches 80 percent, the product quality is high, the purity reaches 99.5 percent, and the appearance is white.

The invention relates to a preparation method of an efficient adsorbent for gaseous mercury sampling, and particularly relates to a preparation method of the efficient adsorbent for gaseous mercury sampling. According to the invention, except halogen and compounds thereof, iodine bromide and dimercaptosuccinic acid are used for modifying; by relevant experiment, the result shows that activated functional groups of carbonyl, halogen and the like which are increased on the surface of modified activated carbon are beneficial to chemical adsorption of the element mercury and divalent mercury, and especially a symmetrical stable structure formed by the combination of dimercaptosuccinic acid and mercury enables the adsorption capability of the modified activated carbon on mercury to be improved greatly.

The invention relates to a method for detecting the vinyl content of low vinyl methyl vinyl silicone rubber (referred to as "110 silicone rubber"). Molding, testing the Shore hardness, and obtaining the vinyl content according to the Shore hardness. The traditional detection method is the iodine bromide method, that is, the addition color reaction. This method is cumbersome to operate, takes a long time to detect (5 hours), and has a large detection deviation (±0.02%), especially for low vinyl content of less than 0.06%. Base 110 silicone rubber cannot be effectively identified. The new method for detecting the vinyl content of 110 silicone rubber is the application method, that is, the network structure is formed by vulcanization and cross-linking, and the vinyl content is reflected by the hardness. This method has the advantages of rapid evaluation, simple operation and direct application, and can more intuitively guide customers to use the product.

The present invention relates to a method for synthesizing 2-methoxy-4-amino-5-ethylsulfone methyl benzoate by halogenation with halogen. In the present invention, the target product is condensed with sodium ethyl sulfinate by halogenation (chlorination, bromination, iodination) of 2-methoxy-4-acetylaminobenzoic acid methyl ester with halogen, and its advantage is that the process route is simple, The product yield is high, the total yield reaches 80%, the product quality is good, the purity reaches 99.5%, and the appearance is white.

The invention relates to a method for preparing methyl 2-methoxy-4-amino-5-ethylsulfone benzoate by halogenation with halogen. In the present invention, the target product is condensed with sodium ethyl sulfinate by halogenation (chlorination, bromination, iodination) of 2-methoxy-4-acetylaminobenzoic acid methyl ester with halogen, and the advantages are that the process route is simple, The product yield is high, the total yield reaches 80%, the product quality is good, the purity reaches 99.5%, and the appearance is white.

The invention discloses a method for preparing 1-bromo-2-iodotetrafluoroethane. In the method, under the existence of organic solvent or absence of solvent, tetrafluoroethylene and iodine bromide are subjected to gas-liquid phase reaction under the initial reaction temperature of 50 DEG C to 80 DEG C and the tetrafluoroethylene gas pressure of 0.1MPa to 2.0MPa, so that the 1-bromo-2-iodotetrafluoroethane is produced, and the organic solvent is C2-C4 fluorine-containing halogenated hydrocarbon or C2-C4 hydrogen fluorin-containing halogenated hydrocarbon, the boiling point of which is higher than the boiling point of the 1-bromo-2-iodotetrafluoroethane. The product selectivity of the method is high, and the product is easy to separate and purify. The purity is about 97 percent, and the price is relatively low.

The invention relates to a method for preparing 2-methoxy-4-amino-5-ethylsulfonylbenzoic acid methyl ester, which is prepared by halogenating 2-methoxy-4-acetylaminobenzoic acid methyl ester with halogen ( Chlorination, bromination, iodination), and then condense the target product with sodium ethyl sulfinate, which has the advantages of simple process route, high product yield, total yield of 80%, good product quality, purity of 99.5%, and The appearance is white.

The invention provides a subcritical preparation method of three-atomic-layer high-quality graphene. The subcritical preparation method comprises the following steps: iodine bromide is used as an intercalation agent to prepare a three-order graphene intercalation compound, then the three-order graphene intercalation compound is placed in a subcritical water environment, an intercalation agent (iodine bromide) is dissolved in water and generates violent reaction with water in a graphite layer, the violent reaction and the high-pressure permeation action of the subcritical water environment acton a graphite sheet layer, and by peeling, the graphene material with the three-atomic-layer thickness is obtained. The subcritical preparation method provided by the invention has the beneficial effects that the adopted subcritical reaction temperature is 100-240 DEG C, so that the subcritical preparation method is suitable for industrial or laboratory operation; due to rapid reaction, the subcritical preparation method is suitable for preparing large-laminar graphene materials with three-atomic-layer thickness and can be used for the fields of transparent conducting films, energy storage devices and superconductors and the like.

The invention discloses a nanoparticle catalyst with an ultrathin platinum metal layer and a preparation method of the nanoparticle catalyst, and belongs to the technical field of nano material preparation. The invention particularly relates to a simple, rapid and one-step synthesis method of ultrathin platinum metal layer nanoparticles with efficient catalytic performance. According to the invention, polyvinylpyrrolidone is used as an end-capping reagent, organic solvents such as triethylene glycol and tetraethylene glycol are used as a solvent and a reducing agent, and potassium bromide or iodine bromide is used as a synthesis blocking agent for platinum metal layer nanoparticles with efficient catalytic activity. The nanometer material with the platinum metal layer and high catalytic activity is synthesized in a green, simple, convenient and rapid hydrothermal synthesis mode, the catalytic activity of the nanometer material is remarkably higher than that of a commercial catalyst, the stability is good, and the catalytic effect is not remarkably changed after the nanometer material is placed for 9 months or above.

The invention relates to a process for recovering iodine from medical organic waste liquid containing iodine bromide. First, liquid caustic soda is used to neutralize a large amount of acid in the waste liquid, and liquid caustic soda is used to maintain weak acidity, and sodium sulfite is used to reduce the water layer. The form of sodium enters the water layer, and the aqueous solution containing sodium iodide is incinerated at a high temperature (1000-1100 °C) in an incinerator to obtain an iodine-containing aqueous solution that completely removes organic matter, and then the iodine is extracted by a conventional oxidation iodine process, with a yield of more than 98%. More than 96%; the organic layer is used as a high calorific value fuel as a fuel for an incinerator, and the heat generated is used for production to reduce environmental pollution.

The present invention relates to a light-sensitive emulsion, and a light-sensitive photographic material containing the same, comprising silver bromoiodide grains of a core shell structure comprising: a) an inner core consisting essentially of silver bromide or silver bromoiodide and having a silver iodide content within the range of 0 to 10 mole %, and b) a plurality of shells consisting essentially of silver bromide or silver bromoiodide, wherein said silver bromoiodide grains exhibit an average grain size lower than 0.60 micrometer, an average grain thickness lower than 0.15 micrometer, and an average aspect ratio lower than 5:1.

The invention provides a preparation method of a carbon / carbon composite material MoB2 anti-oxidation outer coating. The preparation method comprises the following steps of dispersing MoB2 powder in methanol, performing ultrasonic oscillation and stirring to obtain a suspension A; adding iodine bromide into the suspension A, performing ultrasonic oscillation, and stirring to obtain a solution B; pouring the solution B into a hydrothermal reaction kettle and controlling the filling degree to be 70-80%; then clamping a carbon / carbon composite material test sample with a SiC inner coating on a cathode clamp in the hydrothermal kettle, and placing the hydrothermal kettle into an oven; respectively connecting a positive electrode and a negative electrode of the hydrothermal kettle onto two corresponding electrodes of a pulsed power supply, and naturally cooling to room temperature after the end of hydrothermal electrophoresis electric arc discharge; opening the hydrothermal kettle, taking out the test sample and then drying to obtain the carbon / carbon composite material MoB2 anti-oxidation outer coating. The carbon / carbon composite material MoB2 anti-oxidation outer coating prepared by the preparation method provided by the invention has the advantages of uniform thickness and no cracks on the surface; the adopted process method has the advantages of simplicity in preparation, convenience in operation, easiness in obtainment of raw materials, short preparation period and low cost.

The invention discloses a method for recycling byproducts in the preparation process of iodosuccinimide. The method comprises the following steps: recycling and refining the byproducts iodine bromidegenerated in the preparation process of iodosuccinimide into iodine, and preparing iodosuccinimide. The whole process is quick in reaction and suitable for industrial production.

The invention discloses a method for preparing halogenated sugars under mild conditions. The halogenated sugars (chlorine, bromine and iodine) can be obtained by reacting an easily prepared glucosinolate donor with a halogen element or an interhalogen compound at room temperature. . The halogen element and the inter-halogen compound described therein are iodine element, iodine bromide and iodine chloride, which are readily available commercially. This method is applicable to all kinds of pyranose and furanose. And this method has no limitation on the protecting group of the glucosinolate donor, which can be an electron withdrawing group such as acetyl group, benzoyl group, etc., or an electron donating group such as benzyl group, silicon group, etc. At the same time, the reaction can occur in various organic solvents such as dichloromethane, acetonitrile, and toluene. The preparation method of the halogenated sugar of the present invention is simple, the reaction conditions are mild, the raw materials are readily available, the application range is wide, the halogenated sugar is compatible with acid-labile groups such as isopropylidene ketal and silicon groups, and is unstable in the separation process. The halogenated sugar can be purified by removing the solvent.

The present invention relates to a kind of synthetic method of 2-methoxy-4-amino-5-ethylsulfonyl benzoic acid methyl ester, the present invention is that 2-methoxy-4-acetamido benzoic acid methyl ester is halogenated by halogen ( Chlorination, bromination, iodination), and then condense the target product with sodium ethyl sulfinate, which has the advantages of simple process route, high product yield, total yield of 80%, good product quality, purity of 99.5%, and The appearance is white.

The invention provides a preparation method of a dispersible three-layer graphene intercalation compound. According to the preparation method, iodine bromide and graphite are firstly mixed and heatedto prepare a third-order graphite intercalation compound. Through high-temperature treatment, an intercalator iodine bromide is decomposed to generate gas so as to peel graphite layers and obtain a three-atomic-layer high-quality graphene material; by using ferric trichloride as an intercalator and through the molten-salt process for intercalation, a three-layer graphene intercalation compound isobtained; and by using an oxidizing agent for oxidizing the outside and edge of the three-layer graphene intercalation compound, a three-layer graphene intercalation compound which can be dispersed ina common solvent is obtained. In the method, oxygen-containing groups at the outside of graphene can further regulate electrical, thermal and magnetic properties of the three-layer graphene intercalation compound to form a new material, and the disadvantage that a graphene intercalation compound has no solubility in a common solvent is overcome. The product can be applied in manufacturing of devices such as novel micronanoelectronics, superconductors, transparency electrodes, high-frequency transistors and the like.