Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for extracting iodine and kelp, applied in the field of extracting iodine, can solve problems such as difficulty in removing small molecular organic impurities, and achieve the effects of improving the yield of iodine, improving the adsorption effect, and improving the yield of iodine.
Active Publication Date: 2013-05-01
QINGDAO BRIGHT MOON SEAWEED GROUP
View PDF4 Cites 8 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] Aiming at the above-mentioned deficiencies in the methods for extracting iodine from kelp in the prior art, the present invention provides a method for extracting iodine
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0024] The method for extracting iodine from kelp of the present invention comprises the following steps:
[0025] 1. Select the dried kelp that is aired, weigh 100Kg and soak it in the way of secondary soaking, put the above-mentioned dried kelp into the secondary soaking solution and spread it evenly, soak for 90 minutes, and the obtained kelp soaking solution is used for step 2 treatment. Add 1200 Kg of tap water to the sea-tangle after the above-mentioned first soaking and soak for the second time. The soaking time is 30 minutes. The liquid after soaking is the second soaking liquid for the next dry sea-tangle soaking.
[0026] 2. The kelp soaking liquid obtained is purified through the following steps:
[0027] (1) Add calcium oxide to adjust the pH value to 8.0, centrifuge and inflate at the same time, let it stand for 1 hour, separate impurities such as scum in the upper layer and sediment settled at the bottom, and take the first clear liquid;
[0028] (2) Add sodium ...
Embodiment 2
[0036] The method for extracting iodine from kelp of the present invention comprises the following steps:
[0037] 1. Choose fresh kelp, weigh 500 Kg, put the above fresh kelp into the secondary soaking solution and spread it evenly, soak for 60 minutes, the obtained kelp soaking solution is used for step 2, add 3000 Kg of tap water to the kelp after soaking once Soak for the second time, the soaking time is 30 minutes, and the liquid after soaking is used for the fresh kelp soaking next time.
[0038] 2. The obtained kelp soaking liquid is purified through the following steps:
[0039] (1) Add calcium hydroxide to adjust the pH value to 8.0, and carry out continuous air flotation at the same time to separate impurities such as scum in the upper layer and sediment settled at the bottom, and take the first clear liquid;
[0040] (2) Add sodium hydroxide to the obtained first supernatant to adjust the pH value to 11.5, carry out continuous air flotation and separation at the sa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a method for extracting iodine from kelp. The method comprises the following steps of kelp immersion, kelp immersion liquid purification, acidification oxidation conversion into dissociative iodine, adsorption by a resin, reduction desorption and iodine oxidation precipitation. Concretely, the method comprises the following steps of preparing an immersion liquid of kelp as a raw material, carrying out multistage reaction purification separation, adding calcium oxide or calcium hydrate into the immersion liquid subjected to purification separation for air floatation to remove water-soluble alginate and proteins which can react with calcium ions, adding an alkali into the immersion liquid treated by the previous step to remove alkaline insoluble substances such as fucoidin and water-insoluble impurities by air floatation separation under strong alkaline conditions, and adding an acid into the immersion liquid treated by the previous step to further remove acid-insoluble proteins by air floatation under acidic conditions. Through removal of the organic impurities, competitive adsorption of elemental iodine in resin adsorption is avoided and resin adsorption effects and an iodine yield are improved. Compared with the method for treating an immersion liquid only by a caustic soda solution, the method provided by the invention can effectively purify a kelp immersion liquid and improve an iodine yield.
Description
technical field [0001] The invention relates to a method for extracting iodine from kelp. Background technique [0002] Iodine is not only an essential element for the human body, but also one of the important inorganic chemical raw materials, which plays a decisive role in the national economy. At present, iodine is a scarce resource in the world. [0003] At present, countries with higher iodine production in the world include Japan, the United States, and Chile. In Chile, iodine is a by-product of the process of producing sodium nitrate from natural saltpeter. Japan's iodine production accounts for about 70% of the world and is the world's largest iodine-producing country. The raw materials of iodine produced in the United States mainly come from the oil and gas field brine from the exploitation of oil and natural gas, and the interlayer brine of salt lakes. [0004] my country is a country seriously deficient in iodine, and most of the iodine needs to be imported. S...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more