22 results about "High iodine" patented technology

The utility model discloses a catalytic hydrogenation reactor for treating a biomass raw material with a high acid value and a high iodine value, and belongs to the technical field of oil product hydrogenation. The catalytic hydrogenation reactor comprises a reactor pressure-bearing container, an inner cylinder, an ash discharge port, a feeding assembly, a reaction assembly and a discharging assembly, the inner cylinder is arranged in the reactor pressure-bearing container, the feeding assembly and the reaction assembly are arranged in the inner cylinder, the reaction assembly comprises a ceramic tube bundle internal part, the discharging assembly is arranged above the inner cylinder, and the discharging assembly is arranged above the inner cylinder. The ash discharge port is formed in the center of the bottom of the reactor pressure-bearing container. By arranging the ceramic tube bundle internal part in the catalytic hydrogenation reactor, on one hand, the ceramic tube bundle internal part serves as a reaction assembly and has certain acid corrosion resistance, and on the other hand, the ceramic tube bundle internal part serves as a solid catalyst carrier, selective hydrogenation of high-acid-value and high-iodine-value biomass raw materials is achieved, the iodine value is effectively reduced, and coking of the high-iodine-value biomass raw materials in the reaction process is avoided; in addition, the acid value is maintained as far as possible while the iodine value is reduced, and the solid catalyst and the catalytic hydrogenation reactor are not corroded, so that the stability of the solid catalyst and the yield of the product are improved.

The invention relates to the technical field of grease chemical industry, and discloses high-iodine oleic acid and a preparation method thereof.The preparation method comprises the steps that waste grease is pretreated; adding a polar modifier into supercritical CO2 to selectively extract oleic acid; adding a polar accelerant compound system into the supercritical system to carry out iodination reaction; refining and separating the product through pressure gradient; and establishing a circulating reiodination system, and returning medium and low iodination products to the iodination step for continuous reaction through a supercritical phase back-mixing technology and precise iodine source addition. According to the method, the oleic acid extraction selectivity coefficient is increased by 40-60% by introducing the polar modifier, the iodination reaction rate is increased by 50-80% through a polar accelerant compounding system, the total yield is increased to 75-85% from 60-70% through a circulating reiodination system, the product purity reaches 95-98%, high-value utilization of the waste grease is achieved, the production cost is greatly reduced by 40-60%, and the method is suitable for industrial production. No organic solvent is left, and the method is environment-friendly.

The invention discloses a preparation method of a stannous sulfide-mesoporous silica material for adsorbing radioactive iodine, which comprises the following steps: dissolving stannous chloride dehydrate, thiourea and PEG (polyethylene glycol) 1500 in a mixed solution of absolute ethyl alcohol and ethylene glycol, then adding mesoporous silica, heating and stirring to obtain a mixed solution; transferring the obtained mixed solution into a hydrothermal reaction kettle, carrying out hydrothermal reaction, then naturally cooling to room temperature, and washing to obtain the stannous sulfide-mesoporous silica material adsorbing radioactive iodine. The invention develops a novel efficient radioactive iodine adsorption material which has the advantages of low cost, high iodine adsorption capacity, easiness in macro preparation and the like, and a new material and a new method are provided for radioactive gaseous iodine treatment.

The invention discloses a method for recovering elemental iodine from perfluoroalkyl iodide, which comprises the following steps: (1) mixing perfluoroalkyl iodide and an alkaline solution to form a reaction solution, and heating and stirring to form a deiodinated solution; (2) adjusting the pH value of the deiodinated solution to 6-7 by using an acidic solution, and distilling to obtain an inorganic iodized salt solid; and (3) adding water to dissolve the inorganic iodized salt solid to obtain an inorganic iodized salt solution, adding an acidic solution to maintain the pH value to be strongly acidic, adding an oxidizing agent to carry out an oxidation-reduction reaction, filtering and separating to obtain wet iodine, and drying and dehydrating to obtain the iodine simple substance. The method is used for treating perfluoroiodo alkane which is high in iodine content and difficult to treat, an alkaline solution is adopted for reacting with perfluoroiodo alkane for deiodination, the deiodination solution is subjected to acidification and oxidation reaction to prepare high-purity iodine simple substance, and the iodine simple substance can be directly used as a product to be applied to production of iodine-containing compounds.

To provide a polarization film having a polarization membrane with high iodine concentration, good at an initial polarization degree, excellent in a restrictive effect to a single transmittance deterioration by a coloring of the polarization membrane under a high-temperature environment, and furthermore, excellent in a restrictive effect (humidification durability) to a polarization degree deterioration under a high-temperature high-humidity environment.SOLUTION: A polarization film includes a transparent protective film bonded on both sides of a polarization membrane. The polarization membrane is formed with an iodine sucked and oriented onto a polyvinyl alcohol film, with an iodine concentration of 6 wt.% or more. At least one transparent protective film has a moisture vapor permeability of 200 g / (m2 24h) or less, and the polarization film satisfies a condition of a change rate (ΔTs) 0% to 5%, inclusive, with regard to a single transmittance expressed by a general formula (1): ΔTs(%)=Ts750-Ts0.SELECTED DRAWING: None

This invention provides a polarizing film formed by adsorbing iodine onto a polyvinyl alcohol film and orienting it. The polarizing film has an iodine content exceeding 10% by weight, a monomer transmittance of less than 41%, and, in gas analysis, under conditions of inert gas presence, a heating rate of 10°C / min, and a heating range of 40°C to 350°C, the peak temperature of the maximum intensity of water detected by the polarizing film is above 175°C. This polarizing film has a high iodine content, an initial monomer transmittance of less than 41%, and excellent performance in suppressing the decrease in monomer transmittance caused by coloration of the polarizing film in high-temperature environments.

This invention discloses a method for iodine recovery and reuse during the preparation of tetrachlorohexafluorobutane, comprising the following steps: S1, preparing trifluorodichloroiodoethane using refined iodine and trifluorochloroethylene as raw materials, and preparing a tetrachlorohexafluorobutane reaction solution using trifluorodichloroiodoethane as raw material; S2, adding water to the tetrachlorohexafluorobutane reaction solution to obtain a soluble solution, oxidizing, filtering, and refining the aqueous phase to obtain refined iodine, and distilling the organic phase to obtain refined tetrachlorohexafluorobutane, an organic solvent containing iodine and zinc iodide, and an organic iodide; S3, washing the organic solvent containing iodine and zinc iodide with an absorbent to obtain an iodide ion aqueous solution, which is then oxidized, filtered, and refined to obtain refined iodine; the organic iodide is catalytically chlorinated to obtain iodine chloride, which is used to prepare trifluorodichloroiodoethane. The entire process of this invention is rapid, environmentally friendly, and has a high iodine recovery rate, making it suitable for large-scale industrial production.

The application discloses a kind of preparation and application of multi-level hole full-silica zeolite limited copper-bismuth Janus nanoparticle adsorbent, comprising: copper salt and bismuth salt are dissolved in dilute nitric acid solution and then added into deionized water, to obtain bimetallic salt solution;Metal salt solution is added to the raw material for synthesizing full-silica zeolite to pre-crystallize, to obtain gelatinous solution;The obtained gelatinous solution is moved into reaction kettle to carry out hydrothermal crystallization;The obtained sample is filtered, washed, dried, and calcined under inert gas protection, to obtain multi-level hole full-silica zeolite limited copper-bismuth Janus nanoparticle adsorbent.The adsorbent prepared in the application has a multi-level hole structure of microporous-mesoporous, which can avoid oxidation and loss of metal particles during the adsorption process, and the adsorbent is applied to remove radioactive iodine gas, showing high iodine adsorption capacity, and reacting with iodine molecules to form thermodynamically stable CuI and BiI3, further improving the iodine solidification capacity of the adsorbent.

The invention provides a preparation method of activated carbon with a high iodine value and a high specific surface area, and belongs to the technical field of coal-based activated carbon. According to the method, a KOH and water vapor physical and chemical activation method is adopted, and the alkali-carbon ratio is reduced to 1.5: 1 by introducing water vapor to assist activation, so that the problems of over-high economic cost and equipment corrosion caused by over-high alkali-carbon ratio in an existing activated carbon preparation method are solved. In the application, when only KOH is used as the activating agent, the specific surface area of the activated carbon prepared under the condition that the alkali-carbon ratio is 1.5: 1 reaches 1034.1 cm < 2 > / g, and the iodine adsorption value reaches 1427.2 mg / g. When KOH and K2CO3 mixture is used as an activating agent, KOH is partially replaced by K2CO3, the alkali-carbon ratio is kept at 1.5: 1, and the specific surface area of the activated carbon prepared under the condition that the alkali composition is KOH: K2CO3 = 5: 1 reaches 1214.3 cm < 2 > / g, and the iodine adsorption value reaches 1578.4 mg / g. And a mixture of KOH and K2CO3 is used as an activating agent, so that the use of KOH is further reduced, the corrosion to instruments and equipment is reduced, the method is environment-friendly, and the production cost is saved.

The invention relates to the technical field of small-molecule contrast agents, in particular to a small-molecule contrast agent and a preparation method thereof. The structure is shown in the specification. According to the micromolecular contrast agent provided by the invention, based on a symmetric skeleton coupled by iohexol dimer and glycosyl, the imaging performance and the stability of the micromolecular contrast agent are superior to those of a traditional micromolecular contrast agent. Compared with clinical classical iohexol, the molecule integrates two iohexol monomers and a glycosyl targeting group, the number of iodine atoms in each molecule is increased to six, and the high iodine content is directly converted into high inherent contrast brightness.

The invention relates to the technical field of microbial fermentation, in particular to a method for preparing leiocassis longirostris oil through salting fermentation. The fish oil is produced by using the leiocassis longirostris viscera as the raw material, and the problem of high-value utilization of by-products such as the viscera in the leiocassis longirostris processing process can be solved. Results of the specific embodiment of the invention show that compared with a cooking method and a salting fermentation method, the fish oil can be rapidly produced without high-temperature heating, and the fish oil is brighter in color and better in quality, mainly has lower acid value, peroxide value, moisture and volatile matter content, higher iodine value and higher unsaturated fatty acid content, and has a wide market application prospect.

The invention relates to the field of adsorption separation, in particular to a novel bipyridyl covalent organic framework material as well as a preparation method and application thereof. The novel dipyridyl covalent organic framework material is prepared by introducing a dipyridyl group into the structure of the covalent organic framework material. The novel bipyridyl covalent organic framework material disclosed by the invention has the advantages of simplicity in preparation, high specific surface area, high porosity, high iodine adsorption performance and reproducibility. The novel bipyridyl covalent organic framework material disclosed by the invention is uniform and stable in structure and beneficial to large-scale adsorption; the iodine adsorption material also has excellent high chemical stability and thermal stability, can be used for iodine adsorption experiments at 75 DEG C, and is suitable for treating related radioactive accidents, environmental pollutants and other problems in practical fields.

The application provides an iodine-doped starch-based carbon material and a preparation method and application thereof, and relates to the technical field of starch-based carbon materials. The method comprises the following steps: mixing starch, an iodine source and a water-soluble dispersant in a solvent, aging, drying and crushing to obtain a purple red to blue purple inclusion precursor; and then performing gradient carbonization treatment in an inert atmosphere to obtain the iodine-doped starch-based carbon material. The application realizes the inclusion and molecular-level anchoring through the van der Waals force between the spiral cavity of the linear starch and the iodine element, and relies on the water-soluble dispersant to form a physical encapsulation layer on the surface of the starch in situ in the low-temperature carbonization stage, cooperates with the high-temperature carbonization process, and inhibits the volatilization of the iodine element to realize the doping of high iodine content. The obtained material is characterized in that the iodine is embedded in the carbon skeleton in a P-pi conjugate state, the conductivity is significantly enhanced, the carrier concentration is improved, and the sodium ion storage capacity is improved, so that the reversible specific capacity is improved and the first circle coulombic efficiency is improved.

The present application relates to a kind of oral microemulsion of high EPA content and its preparation method.The oral microemulsion includes 1%~50% EPA glyceride raw material, 0.1%~10% high iodine value phospholipid (including PC) by weight percentage, other emulsifiers 0.01~10%, the first auxiliary material for assisting EPA liver enrichment 0~10%, other food neutralizing and / or pharmaceutically acceptable raw materials 0~40% and appropriate amount of water, wherein, EPA glyceride raw material provides high content EPA, the first auxiliary material provides liver targeting component and / or PEG modified component.The oral microemulsion provided by the present application can realize the synergistic absorption of EPA and phospholipid, further with the help of the first auxiliary material, EPA entering blood circulation can be reduced by lipoprotein lipase hydrolysis, also can improve the bioavailability of EPA while promoting its enrichment in liver, therefore, can be used for the prevention and / or treatment of fatty liver and other diseases.

This application discloses a method for preparing a co-crystal iodine adsorbent based on columnar aromatic hydrocarbons, specifically relating to the field of adsorbents. The method includes: co-dissolving columnar aromatic hydrocarbons and a compound containing electron-withdrawing groups in a first solvent to obtain a first mixed solution; allowing the first mixed solution to stand at a preset temperature until blocky crystals precipitate, obtaining a charge-transfer co-crystal. Utilizing the advantages of electron-rich supramolecular macrocyclic columnar aromatic hydrocarbons readily undergoing charge transfer (CT) and possessing intrinsic cavities, the CT interaction between the columnar aromatic hydrocarbons and the compound containing electron-withdrawing groups generates intriguing channels, resulting in high iodine removal efficiency. Furthermore, the chemical composition and assembly structure of this co-crystal are precisely controlled using a macrocyclic host competition method, further improving the adsorption efficiency.

This invention discloses the application of a hetero[3]aromatic crystalline material in the adsorption and separation of a mixture of pyrrolidine and tetrahydrofuran and / or the capture of iodine vapor. It relates to the field of adsorption technology. Firstly, a novel hetero[3]aromatic crystalline material capable of adsorbing and separating pyrrolidine and tetrahydrofuran to achieve iodine capture is synthesized. The application method includes: selectively adsorbing pyrrolidine in a mixture of pyrrolidine and tetrahydrofuran using the novel hetero[3]aromatic crystalline material to obtain a pyrrolidine-hetero[3]aromatic crystalline material, achieving the separation of tetrahydrofuran and pyrrolidine, and capturing iodine vapor using the pyrrolidine-hetero[3]aromatic crystalline material. Compared with other macrocyclic aromatics, this invention not only achieves the separation of tetrahydrofuran and pyrrolidine, but also has advantages such as high iodine adsorption capacity and good thermal stability; at the same time, the synthesis method has advantages such as simple operation, high yield, simple post-processing, and easy separation and purification of the product.

The invention discloses a preparation process of low-ash coconut shell activated carbon, and belongs to the technical field of activated carbon preparation. The process aims to solve the problems of high ash content, environmental pollution caused by strong acid washing and poor mechanical strength of the product in the prior art. Mixing the coconut shell precursor with a choline chloride-urea eutecticevaporate solvent (DES), and carrying out dipping extraction to realize source deliming of the raw materials; then carrying out quantity-controlled separation to obtain a coconut shell precursor with a specific amount of residual DES; the precursor is subjected to two-stage programmed heating pyrolysis in an inert atmosphere, a low-temperature platform is kept at a constant temperature to realize template support by utilizing residual DES and prevent pore collapse, and a high-temperature platform is kept at a constant temperature to realize in-situ slow-release activation by utilizing a DES decomposition product. Through integrated utilization of DES dual functions, coconut shell activated carbon with low ash content (1.8-2.6%), high iodine adsorption value (1100-1250 mg / g) and high mechanical strength (greater than or equal to 96%) is synergistically prepared, and the method is short in process flow and environment-friendly.

The invention discloses an hsa-miR-185-5p primer group, a kit and a method for PTC (Positive Temperature Coefficient) metastasis risk detection in a high-iodine environment, and belongs to the technical field of in-vitro auxiliary evaluation of tumor molecules. The primer group comprises hsa-miR-185-5p, a nucleotide sequence of the hsa-miR-185-5p is as shown in SEQ ID NO. 1; the nucleotide sequence of the U6 upstream primer is as shown in SEQ ID NO. 2; the nucleotide sequence of the U6 downstream primer is as shown in SEQ ID NO. 3; and the nucleotide sequence of the miRNA reverse universal downstream primer is as shown in SEQ ID NO. 4. The invention proves that high iodine is an independent risk factor of PTC lymph node metastasis; it is found that the serum exosome miR-185-5p under high iodine is a PTC LNM specific marker; a detection kit containing an autonomously designed primer group and a standardized detection process are constructed, the kit is clinically adapted, and a non-invasive and accurate auxiliary detection tool is provided for metastasis risk stratification of PTC subjects in high-iodine regions.

The present invention provides a polarizing film which is formed by adsorbing iodine on a polyvinyl alcohol-based film and performing orientation, has an iodine content of more than 10% by weight and a monomer transmittance of 41% or less, and contains a radical scavenger, the weight ratio of the content of the radical scavenger to the content of the iodine (the content of radical scavenger / the content of iodine) is 0.01 or more, and in a generated gas analysis, in the presence of an inert gas, under conditions of a temperature increase rate of 10 DEG C / min and a temperature increase range of 40 DEG C to 350 DEG C, the content of the radical scavenger and the content of the iodine are separated from each other, and the content of the radical scavenger and the content of the iodine are separated from each other. The peak temperature of the maximum intensity of water detected by the polarizing film is 175 DEG C or more. The polarizing film has a high iodine content, an initial monomer transmittance of 41% or less, and an excellent effect of suppressing a decrease in monomer transmittance due to coloring of the polarizing film in a high-temperature environment.

The invention relates to the field of material science, and particularly discloses a double-needle independent jet type composite fiber membrane electrostatic spinning preparation technology. The composition is prepared from ZIF-67 powder, polyacrylonitrile, polyvinylpyrrolidone, N, N-dimethylformamide and the like. The preparation method comprises the following steps: standing at room temperature to synthesize ZIF-67 powder, independently preparing a polymer matrix and functional component double-system spinning solution, performing double-needle synchronous electrostatic spinning to enable jet flow to be interwoven and compounded, and performing low-temperature drying post-treatment to obtain the composite fiber membrane. The product can be used for adsorbing pollutants, especially for capturing radioactive iodine, recycling industrial iodine resources and the like, and has the advantages of high iodine adsorption capacity, full exposure of active sites, stable structure and easiness in recycling; the preparation method has the advantages of continuous and stable process, high ZIF-67 loading capacity, uniform dispersion, low energy consumption and environmental protection, the adaptability to scenes such as nuclear facility tail gas purification is high, the process is green and sustainable, the cost is controllable, and the requirements of large-scale production are met.

1. The name of the design product: packaging box (Mn25 high-iodine-value deacetal carbon). 2. The use of the design product: used for containing Mn25 high-iodine-value deacetal carbon product. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo best indicating the design points: perspective view.

The application discloses a method for detecting ascorbic acid in urine based on nitrogen and boron co-doped fluorescent carbon dots, and belongs to the field of analysis and detection. The carbon dots are prepared by taking citric acid, ethylenediamine and boric acid as precursors, and the fluorescent quantum yield of the carbon dots reaches 84.5%. The high iodine oxide oxidizes the surface functional groups of the carbon dots to generate non-fluorescent groups, so that the fluorescence of the carbon dots is quenched. The ascorbic acid preferentially reacts with the high iodine oxide in an oxidation-reduction reaction, thereby inhibiting the fluorescence quenching effect of the high iodine oxide, and the inhibition degree is related to the concentration of the ascorbic acid. Based on this, a relationship curve between the concentration of the ascorbic acid and the degree of inhibition of fluorescence quenching is constructed, so that the quantitative detection of the concentration of the ascorbic acid in urine is realized, and the detection limit is as low as 0.01 nmol / L. The application first uses an "inhibition" type fluorescence sensor to quantitatively detect the ascorbic acid, and is simple, safe, efficient and suitable for routine analysis.