Process method for extracting potassium from seawater through zeolite process

A process method, seawater technology, applied in seawater treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of insufficient potassium salt resources, no large reserves of soluble potassium ore, etc., and achieve a wide range of sources and save heat consumption. , low cost effect

Inactive Publication Date: 2017-04-26
广安佰瑞德钾盐化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country is a country with insufficient potassium salt resources. So far, no large reserves of soluble potassium ore have been found. The current potassium salt extraction is mainly extracted from bittern, but this method still has disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select clinoptilolite from Baimiaozi, Uradqian Banner, Bayannaoer City, Inner Mongolia, boil it with hot saturated salt water, and after continuing to boil for 2 hours, pour out the boiling liquid, repeat three times of hot saturated brine modification, until the clinoptilolite is washed with water until there is no suspension powder, the clinoptilolite modified by brine was loaded into the adsorption column and kept for later use.

[0023] The adsorption column is packed into the reaction tank, and the reaction tank is provided with four, which are connected in series, and the seawater is fed into the first reaction tank at a uniform speed, and the flow rate of the sea water is 17m / h; and the ammonium chloride solution is added to the reaction tank , the concentration of ammonium chloride solution is 80%.

[0024] Send the solution after serial elution out of the reaction tank, evaporate the water in the solution through the evaporator, then cool the solution, wash and...

Embodiment 2

[0026] Select the analcime from Ulan Tolgai Town, Wushen Banner, selected from the Department of Geology and Mineral Resources of the Inner Mongolia Autonomous Region, and boil it with hot saturated salt water. There is no suspended powder, and the analzeite modified by brine is loaded into the adsorption column and reserved for later use.

[0027] The adsorption column is packed in the reaction tank, and the reaction tank is provided with three, which are connected in series, and the seawater is fed into the seawater at a uniform speed by the first reaction tank, and the flow velocity of the seawater is 17m / h; and ammonium chloride solution is added in the reaction tank, The concentration of ammonium chloride solution is 85%.

[0028] Send the solution after serial elution out of the reaction tank, evaporate the water in the solution through the evaporator, then cool the solution, wash and separate to obtain potassium chloride crystals, and the precipitated crystals are sodiu...

Embodiment 3

[0030] Select anenzeolite from the suburbs of Hohhot, Inner Mongolia, boil it with hot saturated salt water, pour out the boiled liquid after continuing to boil for 2 hours, and repeat the modification with hot saturated brine three times until the dendenite is washed with water until there is no suspended powder. Put it into the adsorption column and keep it for later use.

[0031] The adsorption column is packed in the reaction tank, and the reaction tank is provided with three, which are connected in series, and the seawater is fed into the seawater at a uniform speed by the first reaction tank, and the flow velocity of the seawater is 17m / h; and ammonium chloride solution is added in the reaction tank, The concentration of ammonium chloride solution is 85%.

[0032] Send the solution after serial elution out of the reaction tank, evaporate the water in the solution through the evaporator, then cool the solution, wash and separate to obtain potassium chloride crystals, and ...

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Abstract

The invention discloses a process method for extracting potassium from seawater through a zeolite process. The process method comprises the following steps that clean natural zeolite with the diameter size being 0.8 mm-2 mm is selected; the selected zeolite is boiled through saturated salt water for 2 h and remained for standby application, and the solid-liquid ratio of the zeolite to the saturated salt water is 1:10; the treated zeolite is put into reaction tanks, the seawater with the temperature being 8 DEG C-10 DEG C is uniformly sent into the reaction tanks, and the seawater passing through the reaction tanks is circularly sent into the reaction tanks again; an ammonium chloride solution with the concentration being 80%-90% is added into the reaction tanks to serve as eluents; and the solution is cooled, potassium chloride crystals are precipitated, and the residual solution is sent into the step c to be recycled. According to the process method for extracting the potassium from the seawater through the zeolite process, the natural zeolite serves as an adsorbing agent, an alkali-filtered deaminized mother solution serves as the eluents at a normal temperature, and extraction of the potassium from the seawater and combination of hot-method and alkali making are combined, so that heat consumption in potassium extraction part is reduced, the resource is wide, the cost is low, pollution is not caused, and the economical benefit is high.

Description

technical field [0001] The invention relates to the technical field of potassium salt extraction, in particular to a process for extracting potassium from seawater by zeolite method. Background technique [0002] Potassium salts are widely used in fields such as agricultural fertilizers, chemicals, pesticides, medicines, textiles, printing and dyeing, glass, ceramics, and explosives. They cost a lot of money and are of great significance to the country's economic construction and resource security. At the same time, they are important minerals in short supply in our country. resource. At present, the amount of fertilizer used in my country ranks first in the world, and the import volume of potassium fertilizer ranks second in the world. In recent years, the output of potassium chloride has reached more than 1.3 million tons, but these can only meet 15% of the consumption. [0003] my country is a country with insufficient potassium salt resources. So far, no large reserves ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C01D3/06C02F103/08
CPCC02F1/281C01D3/06C02F2103/08
Inventor 张红张晗江夏尧罗张屏
Owner 广安佰瑞德钾盐化工股份有限公司
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