376 results about "Hydroiodic acid" patented technology

A method of making hydrocarbons from polyalcohols, such as carbohydrates. The polyalcohols and carbohydrates may be provided from biomass, including paper, cardboard or urban generated paper product waste; wood and wood products, including forest slash and deadfall; agricultural waste; and the like. The polyalcohols and carbohydrates are combined with hydroiodic acid in aqueous solution to form the hydrocarbon and elemental iodine. Hydroiodic acid is then electrochemically regenerated by reducing the elemental iodine in a parallel reaction. A method of electrochemically generating hydroiodic acid from elemental iodine in aqueous solution is also described.

A supercapacitor electrode material preparation method based on three-dimensional graphene comprises the steps that foamed nickel with surface oxide removed is steeped in oxidized graphene dispersion liquid, the oxidized graphene is made to be deposited on the foamed nickel, and then the foamed nickel is aired to remove moisture at room temperature after being taken out. The steeping method comprises the steps that the foamed nickel is steeped in the oxidized graphene dispersion liquid with the concentration of 0.5mg/ml-10mg/ml, and is aired after ultrasonic processing is carried out for 1-30 minutes; the quality of the oxidized graphene deposited on the foamed nickel is controlled through the concentration of the oxidized graphene and steeping times, and the steeping times is 1 to 30 times. The prepared oxidized graphene/foamed nickel composite electrodes are reduced through ascorbic acid, then a part of metal nickel is etched and removed by using a chemical etching method or a part of the metal nickel is simultaneously reduced, etched and removed through hydroiodic acid to obtain graphene/foamed nickel composite electrodes. The supercapacitor electrode material preparation method based on the three-dimensional graphene is simple, easy to operate, capable of improving the performance of supercapacitors and reducing manufacturing cost, and suitable for mass production.

The invention discloses a preparation method for a graphene/aramid fibre 1414 nano-fibre composite membrane, comprising the following steps of: performing nano-fibrillation on aramid fibre 1414 yarns via the solution system of dimethyl sulfoxide and potassium hydroxide; slowly adding dimethyl sulfoxide solution for oxidizing graphene, sequentially centrifuging, dispersing, performing suction filtration and film formation, and thus obtaining oxidized graphene/aramid fibre 1414 nano-fibre composite membrane; and reducing via hydroiodic acid, washing, drying, and thus obtaining the graphene/aramid fibre 1414 nano-fibre composite membrane. The tensile strength and the Young modulus of the graphene/aramid fibre 1414 nano-fibre composite membrane obtained by the preparation method disclosed by the invention can achieve 209.4 Mpa and 29.5 GPa respectively, thus showing excellent mechanical property; simultaneously, the conductivity of the graphene/aramid fibre 1414 nano-fibre composite membrane can achieve 175 S/m, thus being excellent in conductance; and a thermogravimetric analysis shows that the graphene/aramid fibre 1414 nano-fibre composite membrane is good in heat stability.

The invention discloses a preparation method of a flexible substrate-based graphene film. The preparation method comprises the following steps of coating a graphene oxide aqueous solution on a paper base material to obtain a uniform graphene oxide film, carrying out drying curing treatment, coating a polydimethylsiloxane (PDMS) layer on the surface of the graphene oxide film, carrying out curing treatment, and dipping the treated paper base material into hydroiodic acid for a reduction reaction, wherein in the reduction reaction, the treated paper base material undergoes a hydrolysis reaction under the acid conditions and simultaneously, reacts with the acid to produce bubbles so that the graphene oxide film is automatically separated from the paper base material and the flexible substrate-based graphene film product is obtained. The invention also discloses a preparation method of a flexible substrate-based graphene composite film. The methods realize graphene reduction without a high temperature condition or a toxic reduction reagent, conveniently and fast realize film stripping and transfer and are especially suitable for large-scale industrial production.

The invention discloses a method for preparing a large-area graphene film. The method comprises the following steps of pouring a graphene oxide aqueous solution on a paper base material to obtain a uniformly-covering graphene oxide film, carrying out drying curing treatment, and dipping the paper base material with the graphene oxide film into hydroiodic acid for a reduction reaction, wherein in the reduction reaction, the paper base material is hydrolyzed under the acidic condition and simultaneously, reacts with an acid to produce bubbles so that the graphene oxide film is automatically separated from the paper base material and the large-area graphene film product is obtained. The invention also discloses a method for preparing the graphene film or large-area graphene composite films. The methods can realize graphene reduction without a high-temperature or a toxic reduction reagent, can conveniently and fast realize film stripping to produce large-area film products and are suitable for large-scale industrial production.

The present invention belongs to the technical field of biological pharmacy, and in particular relates to a preparation and purification method of tetra-hydroxyl xanthone mango aglycone (norathyriol), and an application thereof in hypoglycemic medicine. Based on biological experiments, mango glycoside is used as raw material; under the condition with phenol and hydroiodic acid, carbon-carbon bonds are broken to produce the crude product of mango aglycone; the crude product is separated and purified through silica gel column chromatography so that the mango aglycone is separated; the yield rate reaches 12 percent, the purity is higher than 95 percent, and the reproduction performance is good; the IGTT of C57BL/6 normal mice is effectively improved with the norathyriol; and simultaneously the quantity of insulin secretion induced by glucose in vivo for the C57BL/6 normal mice can be improved with the norathyriol. Therefore, the mango aglycone can be applied for preparation of hypoglycemic medicine.

The invention relates to a preparation method of graphene aerogel and graphene-carbon nanotube aerogel. According to the method, graphene oxide or a mixture of graphene oxide and carbon nanotube is subjected to drying treatment; graphene oxide is reduced through a magnesium thermal reaction; the material is soaked in an acidic water solution; and impurities are removed, and the material is dried, such that graphene aerogel or graphene-carbon nanotube aerogel is obtained. Compared with prior arts, the method provided by the invention has the advantages of simple process, and is green and environment-friendly. Magnesium powder is adopted as a reducing agent. Compared to reducing agents such as hydrazine hydrate, sodium borohydride, formaldehyde, carbohydrate compounds, ascorbic acid and hydroiodic acid, magnesium powder has higher reducibility, such that the graphene aerogel or graphene-carbon nanotube aerogel with high carbon-oxygen ratio can be prepared. The electrical conductivity of the graphene aerogel or graphene-carbon nanotube aerogel can reach 10<4>s/cm. The graphene aerogel or graphene-carbon nanotube aerogel has large specific surface area, and is non-toxic and harmless. The graphene aerogel or graphene-carbon nanotube aerogel can be widely applied.

The invention provides a preparation method for ternary composites of graphene /manganese dioxide nanosheet/polyaniline nanorod. The preparation method includes: drawing graphene oxide suspension liquid into graphene oxide papers using vacuum suction filter, and obtaining the graphene oxide papers under the reducing action of hydroiodic acid; obtaining manganese dioxide nanosheets on the graphene paper surface by a constant voltage deposition method; embedding the polyaniline nanorods between the manganese dioxide nanosheets by an in situ polymerization method to improve the electrical conductivity of the composite materials. The preparation method is simple and is easy to operate, and the material cost is low; in addition, the material has high specific capacitance and excellent electrochemical stability and excellent rate capability. Moreover, the final product is the self-support flexible material, and the graphene paper can act as a current collector and electrode material, and can also be assembled into the flexible components, and has the very good application prospect.

The present invention is process of co-producing sugar and levulic acid solution with lignocellulose material, and belongs to the field of biomass resource utilizing technology. Agricultural and forestry waste as reaction material is dilute acid hydrolyzed in a two-step process at certain temperature and in the presence of 0.01-0.2 mol concentration hydrochloric acid solution, hydroiodic acid solution, sulfuric acid solution or other inorganic acid solution as catalyst to produce both sugar solution and levulic acid solution in the total conversion rate over 20 wt%. The present invention provides one new way for utilizing lignocellulose comprehensively.

The invention relates to the field of graphene materials, in particular to a novel method for preparing a graphene material by reducing graphene oxide (GO). The method is suitable for reducing various graphene-oxide-based powder and thin-film materials. In the method, a graphene oxide product is soaked for 10 seconds-24 hours in a halogenating reagent, such as hydroiodic acid, hydrobromic acid, sulfoxide chloride and the like, in a temperature range from minus 5 DEG C to 140 DEG C, and is taken out and dried, thereby the reduction of the graphene oxide material is completed; and the graphene material obtained after reduction has an excellent electric conduction performance and can maintain the flexibility of thin-film products. The method is simple and is easy to control, can realize the reduction on lots of graphene materials at low temperature with high efficiency and low cost and is beneficial to solving of the problems of environment pollution, high cost and the like in the prior art.

The invention relates to a synthetic method of iodized vegetable fatty acids and their esters. In the invention, at first, vegetable fatty acids are prepared from vegetable oils by the saponificationand acidification, the fatty acids are in the iodination reaction with phosphorus trichloride, phosphorous oxychloride or phosphorus pentachloride and alkali metal iodides such as sodium iodide and the like in an organic medium in the presence of water to generate a hydroiodic acid on site. The iodized vegetable fatty acids are reacted with the alcohol in the catalysis of the acid to produce iodized vegetable fatty acid esters.

The invention relates to a process for purifying a sulfuric acid phase and a hydriodic acid phase in an iodine-sulfur cycle, which belongs to the technical field related to hydrogen production through an iodine-sulfur thermochemical cycle. The sulfuric acid phase and the hydriodic acid phase obtained through a Benson reaction in the iodine-sulfur cycle respectively contain a small amount of HI and a small amount of H2SO4, and a traditional purification process comprises the following steps of: using nitrogen gas as sweep gas, heating to promote the occurrence of the reverse reaction of the Benson reaction: 2HI+H2SO4=SO2+I2+2H2O, and removing impurity acid. The traditional purification process can consume main acid, and a side reaction often occurs together. In order to overcome the defect, the invention provides a two-phase purification process using the mixed gas of oxygen and inert gas as active sweep gas, and as for the purification of the sulfuric acid phase, the reaction principle is 4HI+O2=2I2+2H2O, sulfuric acid is not lost, and the reaction temperature is lower; and as for the purification of the hydriodic acid phase, the active sweep gas can inhabit the generation of S and H2S and promote the selectivity enhancement of converting H2SO4 into SO2.

The invention relates to a method for preparing a reduced graphene oxide-based flexible transparent conductive thin film. A rod-coating film preparation method can be used for reducing a graphene oxide thin film in a solution processing way by means of a hydroiodic acid under the condition of less than or equal to 100 DEG C, so that a technology for the large-area preparation of the reduced graphene oxide-based flexible transparent conductive thin film is implemented. The prepared flexible transparent conductive thin film can be widely applied to the field of photoelectric display, and has the advantages of high electrical conductivity, high transmittance, high mechanical performance, large-area preparation performance (18*20cm<2>), richness and high utilization rate of raw materials, simplicity and environment friendliness of a preparation process, and the like. According to the flexible transparent conductive thin film obtained by the technology, the shortcoming of qualitative fragile of the conventional indium tin oxide (ITO) can be better overcome; and the flexible transparent conductive thin film is expected to be widely applied to the field of photoelectric functional devices such as an organic electroluminescent display and an organic solar cell as a flexible transparent electrode.

The invention relates to a preparation method of a bismuth oxyhalide/bismuth oxide visible-light photocatalyst and belongs to the field of visible-light photocatalyst preparation. The method comprises the following steps: dissolving bismuth nitrate in a salpeter solution, adjusting pH with alkali lye, stirring, filtering, washing, drying, calcining at high temperature of 300-600 DEG C for 3-10 hours to prepare yellow bismuth oxide; adding a proper amount of hydrochloric acid, hydrobromic acid or hydroiodic acid with a certain concentration into the prepared bismuth oxide, carrying out an ultrasonic reaction, carrying out centrifugal separation, and drying at constant temperature of 50-100 DEG C for 4-10 hours to obtain the bismuth oxyhalide/bismuth oxide photocatalyst. The method can be carried out at room temperature and at normal pressure. Equipment is simple and easy to operate, can be put into practical use and has a potential application in industrial production. According to the prepared bismuth oxyhalide/bismuth oxide visible-light photocatalyst, the problem of high photo-generated electron and carrier recombination rate is solved effectively, and photocatalytic performance is greatly enhanced.

The invention discloses a preparation method of a cell-grade anhydrous lithium iodide. The preparation method is as follows: mixing and stirring lithium salt and hydroiodic acid; filtering, evaporating, crystallizing and separating, obtaining acicular crystal of lithium iodide trihydrate; then carrying out pre-drying and vacuum drying; and finally obtaining the cell-grade anhydrous lithium iodide. For the preparation method, the preparation process is simple, the material is cheap and is easy to obtain, the preparation cost is low, and in the whole synthetic process, no organic solvent is adopted, is non-toxic, and is green and environment-friendly. In the anhydrous lithium iodide prepared by the invention, the water content is lower than 0.02%, and the quality is equivalent to that of imported products.

The invention discloses a flexible cathode material of a lithium ion battery and a preparation method of the flexible cathode material. The preparation method is characterized by comprising the steps of uniformly distributing silicon nano particles in a graphene oxide solution, taking an obtained Si@GO suspension as a middle layer solution, taking the graphene oxide solution as a first layer solution and a third layer solution, sequentially performing suction filtration on the three layer solutions by a vacuum suction filtration method to form a GO/Si@GO/GO sandwich structure film, and finally soaking the GO/Si@GO/GO sandwich structure film in hydroiodic acid for reduction to obtain an rGO/Si@rGO/rGO sandwich structure composite material as the flexible cathode material of the lithium ion battery. The flexible cathode material of the charging and discharging lithium ion battery effectively solves volume expansion and conductivity problems of a nano silicon material in charging and discharging processes of the battery, and a stability problem of an SEI (Solid Electrolyte Interface) film, improves the rate performance and the cycle performance of the battery, and is applicable to the flexible lithium ion battery; the preparation method is simple; and mass production can be realized.

The invention relates to a preparation method of porous graphene flexible foam, which comprises the following steps: adding graphite oxide prepared by an improved Hummers method into distilled water to obtain a graphite oxide dispersion liquid, conducting ultrasonic dispersion to obtain a graphene oxide solution, and conducting vacuum filtration to obtain a graphene oxide film; reducing the graphene oxide film with a hydroiodic acid solution, and conducting washing and drying to obtain a graphene film; exposing the graphene film to infrared laser to obtain the porous graphene flexible foam. The preparation method provided by the invention is simple, and the prepared porous graphene flexible foam has a continuous three-dimensional porous structure, lower density and excellent mechanical properties.

The invention discloses a manufacturing method of hydrogen carbinol through solar energy, which comprises the following steps: 1. preparing steam through solar energy; 2. making and separating calcium iodide; 3. hydrolyzing calcium iodide at middle temperature; preparing hydriodic acid; 4. making hydrogen; recycling iodine; 5. refining hydrogen; 6. sintering hydriodic acid; 7. recycling iodine and oxygen; 8. purifying water; 9. adopting hydrogen from front eight steps as raw material to synthesize carbinol. The photolytic pond to prepare hydrogen can be light-transmission flat-pattern container within lead net.

The invention relates to a preparation method for pentafluorophenol. By taking hexafluorobenzene as an initial raw material, pentafluorophenol is prepared through etherification reaction and cracking reaction or by taking hexafluorobenzene as the initial raw material, pentafluorophenol is prepared by virtue of a one-step method. The preparation method provided by the invention does not need high temperature and pressurization, is less in energy consumption, and does not use expensive hydroiodic acid, so that the cost of the raw materials is low. Moreover, wastewater generated by etherification reaction is less, so that the preparation method is environmental-friendly; Cracking is carried out in a solvent, the material stirring effect is good, the reaction temperature is easy to control, and industrialization is easy to implement.

The invention provides a preparation method of a flexible electrode based on graphene. The preparation method comprises the steps of graphene oxide solution preparation, coating, chemical reduction and electrochemical reduction. In the chemical reduction step, acetic acid and hydroiodic acid are adopted as reducing agents so that the functional groups of the graphite (graphene) oxide can be well removed and the electrical conductivity of the graphene oxide can be improved; in the electrochemical reduction, pressurization is realized by virtue of linear sweep voltammetry to further reducing the oxygen-containing functional groups. The flexible thin-film electrode which is prepared by use of the preparation method of the flexible thin-film electrode and hybridized with the heat-treated graphene oxide and an electrode active material can be widely applied to the fields of batteries, touch screens, OLEDs, super capacitance materials, green and environment-friendly automobiles and the like.

A method includes the steps of receiving a conductor element formed from a plurality of carbon nanotubes; and exposing the conductor element to a controlled amount of a dopant so as to increase the conductance of the conductor element to a desired value, wherein the dopant is one of bromine, iodine, chloroauric acid, hydrochloric acid, hydroiodic acid, nitric acid, and potassium tetrabromoaurate. A method includes the steps of receiving a conductor element formed from a plurality of carbon nanotubes; and exposing the conductor element to a controlled amount of a dopant solution comprising one of chloroauric acid, hydrochloric acid, nitric acid, and potassium tetrabromoaurate, so as to increase the conductance of the conductor element to a desired value.

The invention discloses a highly conductive flexible self-supporting graphene film and a preparation method thereof: according to the improved Hummers method, graphite is used as a raw material to prepare a uniformly dispersed graphene oxide aqueous solution; the solid substrate is first subjected to plasma surface treatment , and the graphene oxide solution was titrated on a solid substrate and dried to form a film. The obtained graphene oxide film is put into hydroiodic acid aqueous solution and heated for reduction, and the obtained graphene film can be automatically separated from the solid substrate to obtain a highly conductive flexible self-supporting graphene film. The method is simple in preparation, convenient in operation, simple in equipment and process requirements, cheap in raw materials and low in cost, and can realize large-scale industrial production. The prepared self-supporting graphene film has controllable thickness, good flexibility, and high conductivity, and is expected to be used in flexible electronics, supercapacitors, and wearable sensors.

The invention discloses a removing liquid of metal palladium in the printing circuit manufacturing course, which comprises the following parts: 65% nitric acid with density at 1-100g/L, 36% alcaine or hydrobromic acid or hydriodic acid with density at 10-300g/L, organic compound with nitrogen as copper preservative with density at 0.01-10g/L and aquacare or inducer or guanidine derivant as control agent of NO2. The printing circuit board is placed in the solution, which removes catalyst palladium on the insulating surface through spraying the circuit.

The invention discloses a production method of hydrogen iodide, which adopts a red phosphorus method and comprises a reacting step, a filtering step and a distilling step sequentially. In the reacting step, deionized water is added into reaction equipment; after red phosphorus and iodine are added, the weight ratio of the reaction material liquid is measured and is controlled to be between 1.2 and 1.4; and hydroiodic acid steam is absorbed by a water spraying pump. The filtering step includes two times of filtering. The production method provided by the invention solves the problem of difficult realization of mass production, and avoids the occurance of explosion, has high production efficiency and contributes to environmental protection at the same time.