Process method for extracting potassium from seawater through zeolite process

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 ...