48 results about "Zinc iodide" patented technology

Clear, high density brine for use completion operations in a subterranean formation for the recovery of hydrocarbons. The brine comprises an ionic compound selected from the group consisting of zinc iodide, strontium bromide, strontium iodide, cerium bromide, cerium iodide, cerium chloride, lanthanum bromide, lanthanum iodide, lanthanum chloride, and mixtures thereof. The brine may also advantageously be used as the internal phase of invert emulsion drilling fluids.

A low-permeability solid-free completion fluid is characterized by comprising the following components in mass percentage: 20-65% of specific gravity regulator, 1-3% of fluid loss agent, 1-2% of antiswelling agent, 0.05-0.1% of crystallization inhibitor, 0.5-1% of anti-collapse agent, 0.5-1% of corrosion inhibitor and the balance of water, wherein the specific gravity regulator is one or a combination of more than two of zinc chloride, zinc bromide, zinc iodide, zinc sulfate, zinc acetate, zinc chlorate and zinc nitrate; the fluid loss agent is carboxymethyl modified starch; the antiswelling agent is diallyl dimethyl ammonium chloride; the crystallization inhibitor is one or a combination of two of nitrilotriacetic acid and EDTA (ethylene diamine tetraacetic acid); the anti-collapse agent is nitro potassium humate; and the corrosion inhibitor is one or a combination of more than two of sodium molybdate, sodium tungstate and sodium chromate. The low-permeability solid-free completion fluid is large in specific weight, good in stability and resistant to high temperature and high pressure, can reduce the swelling rate of clay, improves the core permeability restoring value and does not generate precipitates.

A metal halide discharge lamp comprises a lamp body and a chamber formed within the body. A pair of electrodes extends into the chamber and have electrode tips spaced apart from one another. A discharge medium composition is sealed within the chamber that generates a plasma, which generates visible light. The composition comprises a rare gas, a first metal halide that produces a luminous flux and zinc iodide that generates a desired lamp operating voltage. The composition may also comprise zinc, sealed in the chamber, in elemental form that is not derived from the first metal halide or the zinc iodide. The zinc iodide halide serves as a substitute for mercury for purposes of generating desired lamp operating voltage; and, the excess pure zinc attracts or reacts with iodine atoms thereby making available electrons and the first metal halide for generation of a luminous flux.

The invention relates to a preparation process of ethyl chromane-4-formate. The preparation process is characterized by comprising the following steps of: carrying out Friedel-Crafts acylation reaction and cyclization, addition reaction, hydrolysis reaction and esterification reaction, wherein, in the Friedel-Crafts acylation reaction and cyclization, the Friedel-Crafts acylation reaction is carried out in the presence of anhydrous aluminium trichloride by using a compound of formula 1 and 3-chloropropionylchloride as initial raw materials, then carrying out cyclization on an obtained product and 10% NaOH to obtain a compound of formula 2; in the addition reaction, the addition reaction is carried out on the compound of formula 2 and trimethylsilyl cyanide in the presence of zinc iodide to obtain a compound of formula 3; in the hydrolysis reaction, the compound of formula 3 is hydrolyzed under the conditions of stannous chloride dihydrate, concentrated hydrochloric acid and acetic acid to obtain a compound of formula 4; and in the esterification reaction, the compound of formula 4 is esterified in the presence of concentrated sulfuric acid to obtain a compound of formula 5. According to the preparation process, expensive trifluoromethanesulfonic acid is replaced with cheap anhydrous aluminium trichloride in the Friedel-Crafts acylation step, and the yield is improved, so that the cost of preparing the compound is greatly reduced, and the high-quality product is obtained; and compared with the traditional method, the preparation process has obvious advantages.

The invention discloses a preparation method of acrylic acid-4-chlorobutyl ester compounds. A catalyst is added to an organic solvent, acryloyl chloride or methacryloyl chloride is added dropwise, the mixture undergoes a ring-opening reaction for 0.5-10 h, and acrylic acid-4-chlorobutyl ester compounds are generated; the catalyst is a zinc salt compound. With the zinc salt compound such as zinc chloride, zinc bromide or zinc iodide as the catalyst, the preparation reaction condition is relatively mild, and the acrylic acid-4-chlorobutyl ester product can be obtained in a short time, and the yield of the acrylic acid-4-chlorobutyl ester product prepared with the method is higher and can be 90% or higher.

A composite electrode comprises at least one graphene layer and at least one doping layer, and two adjacent layers are not both the doping layer; wherein the doping layer is an aluminum chloride layer or a zinc iodide layer. It is used for manufacture of a display device.

The invention belongs to the technical field of illumination of light sources, and particularly relates to a small-power metal halide direct current lamp which is stable in arc and can work under a direct current stabilizer. The small-power metal halide direct current lamp comprises a quartz bubble shell, wherein a sealed light-emitting arc tube is arranged in the quartz bubble shell, a cathode and an anode are arranged in the sealed light-emitting arc tube, one end of the cathode extends into the light-emitting arc tube, the anode is matched with the cathode, the other end of the cathode and the other end of the anode are located in the quartz bubble shell and are connected with molybdenum sheets respectively, the molybdenum sheets are connected with molybdenum rod leads respectively, the molybdenum rod leads extend out of the quartz bubble shell, the light-emitting arc tube is filled with stuffing, the stuffing comprises 3-6.5 atmospheres of xenon, 0.5-0.9mg of mercury, zinc iodide and one or more of metal halide DyI3, DyBr3, HoBr3, NdI3, CsI, InI, NaI, ScI3, ThI4 and T1I. The small-power metal halide direct current lamp can output stable light rays, bring convenience to using and reduce using cost of users, and is long in service life.

The present invention discloses a method of synthesizing spiro ketal by dual-organic zinc reagent. The method is that the dual-organic zinc iodide with ketal is used to react with acyl chloride to produce the diketone with ketal to be deoxidized and synthesized as dihydroxy ketal by sodium borohydride, and then the spiro ketal is further synthesized under the catalysis of p-toluenesulfonic acid. The present invention shortens the synthesis route of the spiro ketal greatly and at the same time reduces the synthesis cost; the reaction yield is high, and the total yield is 24 percent to 38 percent; the reaction condition is gentle; the operation is simple; the present invention is easy for the industrialized production.

The invention discloses a blue-light InP / ZnS quantum dot and its preparation method and application in QLED devices. The invention combines indium source, phosphorus source, zinc iodide, oleylamine, zinc stearate, Alcohol and 1-octadecene are placed in a 50ml flask, and in a nitrogen environment, different temperatures and reaction times are controlled to form an InP core and a ZnS shell, respectively, to obtain InP / ZnS quantum dots that emit pure blue light. Compared with the traditional method, the present invention uses a one-pot method to synthesize InP / ZnS quantum dots, which is simpler and more time-saving, and the lattice mismatch between the shell and core of the synthesized quantum dots is lower, with fewer defects and higher Fluorescent quantum efficiency, blue quantum dots synthesized by traditional methods mostly have a luminous peak wavelength above 470nm, and the quantum dots of the present invention have a luminous peak wavelength below 470nm, which is pure blue light, and the prepared QLED is non-toxic compared to cadmium-based quantum dots. Advantages, more conducive to commercialization.

The invention relates to the technical field of supercapacitor materials, and discloses a supercapacitor material based on biochar-coated [Zn4O(BDBC)3]8 and a preparation method thereof. The supercapacitor material comprises the following formula materials: biological straw, biphenyl-4, 4'-dicarboxylic acid, and zinc iodide. According to the supercapacitor material based on biochar-coated [Zn4O(BDBC)3]8 and the preparation method thereof, a metal organic framework [Zn4O(BDBC)3]8 itself has very low internal resistance and good electrical conductivity so as to reduce the resistance of migratingmetal ions and charges through an electrode material, and increase the specific capacitance and energy density of the capacitor. The biochar has a large specific area and porosity. The surface of thebiochar has a large number of highly aromatized oxygen-containing groups which form hydrogen bonds with the active oxhydryl on the surface of the [Zn4O(BDBC)3]8 such that the [Zn4O(BDBC)3]8 is evenlydispersed and attached tightly to the pores of the biochar, thereby increasing the contact area between [Zn4O(BDBC)3]8 and an electrolyte, diffusing and mirgrating a large number of metal ions and charges between the electrode material and the electrolyte, and increasing the power density and the energy density of the supercapacitor.

The invention belongs to chemical technical field, in particular to a chemical method for semiconductor film materials of ternary wide bandgap compound of synthesis of copper-zinc iodide. The method is that putting the copper-zinc alloy film into iodine vapor with a temperature of 45 DEG C to 80 DEG C for co-oxidation reaction of the copper-zinc alloy. The reaction time takes 3 to 8 hours. After reacting for certain time, Cu2ZnI4 films can be produced in situ on the surface of substrate, and that is the semiconductor film materials of the synthesis of the copper-zinc iodide. The preparation method does not require organic solvents to participate in the reaction or reaction medium. The crystal is crystallized well. The product can be used directly without complicated processing. The method has the advantages of simple operation, rapid reaction, better environmental protection, low energy consumption, low cost and good reproducibility. In addition, a film can be directly formed on the substrate surface in the method. The material is more beneficial for the application in photoelectric conversion devices.