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Method for extracting minerals with high purity from deep ocean water

A mineral and crystallization technology, applied in solution crystallization, seawater treatment, alkali metal chloride, etc., can solve the problems of difficult effective separation and low recovery rate of mineral components, and achieve the effect of improving yield and yield

Inactive Publication Date: 2008-02-13
BLUE OCEAN WORLD
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Problems solved by technology

However, when using these desalination methods, since it is difficult to separate various mineral components contained in seawater very effectively, the recovery rate of the mineral components is low, especially with sodium (Na + ) of the same ionic valence as potassium (K + ) composition and magnesium (Mg 2+ ) components are difficult to effectively separate

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  • Method for extracting minerals with high purity from deep ocean water
  • Method for extracting minerals with high purity from deep ocean water

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Embodiment

[0041]The deep ocean water is finely filtered with a microporous filter (material: PTFE (polytetrafluoroethylene), pore size is about 0.5 μm, manufactured by Sehan Co., Ltd.) to remove impurities (pretreatment), and then filtered with a reverse osmosis system (Doll Chemical Co., Ltd. System, FILMTEC, SW30-4021, yield: 0.5) separated into concentrated water and fresh water. The flow rates (unit: GPD) and mineral concentrations (unit: mg / l) of deep ocean water, pretreated water, and concentrated water are listed in Table 1 below, and the obtained concentrated water had a specific gravity of 4.5° Be.

[0042] Table 1

[0043] deep ocean water

[0044] The above-mentioned concentrated water is sequentially passed through three multiple-function evaporators (10, refer to Fig. 1), while the Baume specific gravity of the concentrated water is 23 ° Be, 30 ° Be and 36 ° Be, and the calcium salt, sodium salt and sulfuric acid The salts were successively separated and remove...

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Abstract

A method for efficiently extracting minerals of high purity from deep ocean water by using low temperature vacuum crystal is disclosed. The method comprises the steps of: obtaining concentrated liquid containing ion components and fresh water without the ion components by freshening the deep ocean water; separating crystals of a calcium salt, a sodium salt, and a sulfate from the concentrated liquid by heat-concentrating and filtering the concentrated liquid; obtaining a mixed salt slurry of a potassium salt and a magnesium salt by concentrating the concentrated liquid from which a calcium salt, a sodium salt, and a sulfate are removed; obtaining a solution in which a magnesium salt is dissolved and a crystal of a potassium salt by washing the mixed salt slurry with water; and obtaining a mixed crystal of a potassium salt and a magnesium salt by concentrating the solution in which a magnesium salt is dissolved, and then separating a magnesium salt solution with improved purity by filtering the concentrated solution in which a magnesium salt is dissolved.

Description

technical field [0001] The invention relates to a method for extracting minerals from deep ocean water, in particular to a method for effectively extracting high-purity minerals from deep ocean water by adopting a low-temperature vacuum crystallization method. Background technique [0002] Deep ocean water generally refers to deep seawater located at a depth of 200 m or more that is not irradiated by sunlight. Deep ocean water has eutrophicity containing a large amount of inorganic nutrients necessary for life activities, cleanliness without chemical contamination, low temperature stability with little temperature change, and long-term ripening under water pressure above 20 atmospheres. The marine resources with characteristics such as nature are widely used in aquatic products (breeding), energy (air-conditioning), products (food, salt, wine, mineral water, cosmetics), medical (atopic skin treatment), etc. In particular, deep ocean water contains four kinds of minerals (ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C01D3/06C01F5/30C02F103/08
CPCC01F5/40C01F11/46C01D3/06C01F5/30B01D9/02C02F1/26
Inventor 秋瑢植孙泰勉
Owner BLUE OCEAN WORLD
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