7 results about "High iodine" patented technology

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 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.

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 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 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 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.