8 results about "Bromide" patented technology

A method for growing a crystal of an Al-containing III-V group compound semiconductor by the conventional HVPE method, characterized in that it comprises a step of reacting Al with hydrogen halide at a temperature of 700° C. or lower to form a halide of Al. The method has allowed the suppression of the formation of aluminum chloride (AlCl) or aluminum bromide (AlBr) reacting violently with quartz, which is the material of a reaction vessel for the growth, resulting in the achievement of the vapor phase growth of an Al-containing III-V group compound semiconductor at a rate of 100 microns/hr or more, which has lead to the mass-production of a substrate and a semiconductor element having satisfactory resistance to adverse environment.

The invention relates to a new method for preparing hexafluorobutadiene. The new method is characterized by comprising the following steps that 1, HFC-134a and Br2 are subjected to a continuous gas phase catalysis reaction under the effect of a catalyst with metal chloride or bromide as an active component to prepare CF3CFBr2; 2, CF3CFBr2 is dripped into a reactor for aprotic polar solvent in which zinc powder is dissolved to prepare trifluoro vinyl zinc bromide; 3, with ferric salt and copper salt serving as catalysts, in the aprotic polar solvent, trifluoro vinyl zinc bromide is subjected to a telomerization reaction to generate a target product hexafluorobutadiene. The refrigerant HFC-134 a and Br2 which are used on a large scale at present and gradually obsoleted are used as starting raw materials, the materials are easy to obtain and low in price, the reaction is carried out under the gas phase condition, the reaction condition is easy to control, and the method is a C4F6 preparing method having a great market application prospect.

The invention discloses a making method of aromatic bromide in the chemical technical domain, which comprises the following steps: adopting active aromatic hydrocarbons, bromide and nitrogen agent as catalyst, metal chloride and reacting solvent to blend together; stirring under normal pressure to react; diluting the composite solution; stewing; filtering to remove organic solid; washing filtrate through thio-sodium sulfate solution until the organic phase displays colorless; separating organic phase; extracting water phase through organic solvent; separating organic phase; combining the organic phase; drying through anhydrous magnesium sulfate; filtering to remove drier; decompressing filtrate and rectifying to obtain rough product; proceeding column chromatography for rough product to obtain pure brom-aromatic product.

The invention discloses a synthesis method for a porous ZnCo2O4 nanosheet and a pseudo-cubic micro-nano structure. The synthesis method comprises the following steps: (1) weighing CTAB (CetyltrimethylAmmonium Bromide), and dissolving in the mixed solution of deionized water and ethylene glycol at a constant temperature to obtain settled solution; (2) weighing Zn(NO3)2.6H2O, Co(NO3)2.6H2O and ureaat the molar ratio of 1:2:15, dissolving in the solution obtained in (1), and fully stirring; (3) transferring the solution obtained in (2) to a polytetrafluoroethylene lining stainless steel reaction kettle, sealing, and reacting for 3-20h at the temperature of 100-180 DEG C; (4) after reaction is finished, naturally cooling to room temperature, carrying out centrifugation, respectively cleaningwith the deionized water and absolute ethyl alcohol for three times, and drying to obtain a Zn-Co precursor. According to the synthesis method, through the simple regulation and control of reaction parameters, the micro-nano structure of ZnCo2O4 of different morphologies can be obtained through synthesis.

The invention discloses a method for synthesizing a 1, 3-disubstituted planar chiral metallocene compound, and belongs to the field of organic synthesis. According to the method disclosed by the invention, simple N, N-alkyl amino methyl ferrocene/ruthenium and aryl iodide or aryl bromide are taken as initial raw materials and are stirred to react in an organic solvent at 80 DEG C under the action of a palladium catalyst, chiral amino acid, a norbornene derivative and alkali, so that the 1, 3-disubstituted planar chiral metallocene compound can be obtained. The method has the advantages of cheap and easily available raw materials, mild reaction conditions, good substrate universality, high yield and simple preparation process.

The invention discloses a preparation method of a silver-coated gold nanorod. The method comprises the following steps that a NaBH4 solution is prepared and is inserted into ice for at least 10 min; a cetyltrimethylammonium bromide (CTAB) solution is added into a container, the container is placed into a water bath at 30 DEG C, and stirring is performed at the speed not higher than 600 rpm; a HAuCl4 solution is added into the CTAB solution, then the NaBH4 solution is added under violent stirring at the speed not lower than 1000 rpm, and a brown seed solution is obtained; after 5 min, the seed solution stands in a water bath for 1 h; an AgNO3 aqueous solution is added into the CTAB solution under the condition of the stirring speed not higher than 600 rpm and the temperature being 30 DEG C, and then the HAuCl4 solution, the ascorbic acid solution and the seed solution are added to obtain a colorless mixed solution; the colorless mixed solution is stirred for 1 min and then stands in the dark for 1 h; the mixed solution obtained after standing is transferred into an Eppendorf tube, centrifugation is conducted to remove supernate, and solution sediment is obtained; the solution precipitate is resuspended in phosphate buffer saline water, and the gold nanorod is obtained; and a silver coating is formed on the surface of the gold nanorod.