Device and method for preparing potassium sulphate

A potassium sulfate and sampling device technology, which is applied in cells, electrolysis process, electrolysis components, etc., can solve the problems of corrosiveness, complex process flow, and large turnover of mother liquor.

Active Publication Date: 2015-12-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metathesis method has a low reaction temperature and a simple process, but its main problem is that the mother liquor turnover is large and corrosive, and it will cause great damage to the equipment.
[0009] Although the existing technolog...

Method used

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  • Device and method for preparing potassium sulphate
  • Device and method for preparing potassium sulphate
  • Device and method for preparing potassium sulphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Assembling the device: Specifically, the electrodialysis device 33 is composed of anion exchange membranes and cation exchange membranes alternately laminated, plus auxiliary materials such as flow channel separators and gaskets, and consists of 22 pairs of anion exchange membranes and cation exchange membranes. The membrane stack 1, the effective area of ​​each membrane is 200dm 2 , and the cathode and anode electrodes 8 and 7 respectively arranged at both ends of the membrane stack, and the electrodialysis device 33 formed by clamping the clamping devices 5 and 6 arranged at the two ends of the electrodes through bolt clamping, the anode chamber inlet 9, the outlet 10, and the cathode chamber inlet 11. Outlet 12, first salt chamber tank inlet 13, outlet 14, second salt chamber tank inlet 15, outlet 16, third salt chamber tank inlet 17, outlet 18, fourth salt chamber tank inlet 19, outlet 20 respectively through The latex tube is connected to the inside of the correspo...

Embodiment 2

[0132] Adopt the device for preparing potassium sulfate shown in embodiment 1 to prepare potassium sulfate, comprise the following steps:

[0133] Perfusion 200mL molar concentration is the potassium sulfate solution of 0.4mol / L in the anode chamber tank 27 and the cathode chamber tank 28 respectively; The volume of potassium sulfate solution accounts for 40% of the volume of the cathode chamber tank 28 .

[0134] Into the first salt room tank 29, pour 250 mL of potassium chloride solution with a molar concentration of 2.8 mol / L, and the volume of the potassium chloride solution accounts for 50% of the first salt room tank 29 volume.

[0135] Into the second salt room tank 30, pour 250 mL of ammonium sulfate solution with a molar concentration of 2.8 mol / L, and the volume of the ammonium sulfate solution accounts for 50% of the volume of the second salt room tank 30 .

[0136] Inject 700 mL of potassium sulfate solution with a molar concentration of 0.05 mol / L into the third ...

Embodiment 3

[0143] Adopt the device for preparing potassium sulfate shown in embodiment 1 to prepare potassium sulfate, comprise the following steps:

[0144] Perfusion 300mL molar concentration is the potassium sulfate solution of 0.3mol / L in the anode chamber tank 27 and the cathode chamber tank 28 respectively; The volume of potassium sulfate solution accounts for 50% of the volume of the cathode chamber tank 28 .

[0145] Into the first salt room tank 29, pour 250 mL of potassium chloride solution with a molar concentration of 2.8 mol / L, and the volume of the potassium chloride solution accounts for 50% of the first salt room tank 29 volume.

[0146] Into the second salt room tank 30, pour 200 mL of ammonium sulfate solution with a molar concentration of 2.8 mol / L, and the volume of the ammonium sulfate solution accounts for 40% of the volume of the second salt room tank 30 .

[0147] Inject 700 mL of potassium sulfate solution with a molar concentration of 0.05 mol / L into the third ...

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Abstract

The invention provides a device for preparing potassium sulphate. The device comprises a membrane stack, a cathode, an anode, a first electrolyte sampling device, a second electrolyte sampling device, a first saline solution sampling device, a second saline solution sampling device, a third saline solution generation device, a fourth saline solution generation device and a power supply. The cathode is connected with the negative electrode of the power supply. The anode is connected with the positive electrode of the power supply. The cathode and the anode are arranged on the two sides of the membrane stack respectively. Six partition chambers including the cathode chamber, the anode chamber, the first salt chamber, the second salt chamber, the third salt chamber and the fourth salt chamber are formed in the membrane stack. According to the device for preparing potassium sulphate, ammonium sulfate serves as a supply source of sulfate ions, potassium chloride is converted into potassium sulphate, the whole process can be conducted at the normal temperature, the energy consumption is low, no strong corrosive substances are generated, and corrosion to devices is small. The process flow is simple, and the mechanization and automation are easy to achieve.

Description

technical field [0001] The invention relates to the technical field of chlorine-free potassium fertilizer production, in particular to a device and method for preparing potassium sulfate. Background technique [0002] Potassium sulfate is a chlorine-free potassium fertilizer that not only contains a high content of K 2 O, also contains 18% sulfur, and the potassium sulfate index is low, which has a relatively small impact on the salinity of the soil. In addition, potassium sulfate also has some unique advantages: no agglomeration, no moisture absorption, and easy transportation. Therefore, potassium sulfate is an excellent potassium source for supplementing potassium in crops that lack potassium and avoid chlorine (such as tobacco, tea, citrus, etc.). [0003] According to the source of raw materials, the method for preparing potassium sulfate includes three major categories: 1. producing from natural potassium sulfate ore or solid potassium ore; 2. extracting from sulfate-...

Claims

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Application Information

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IPC IPC(8): C25B1/14C25B9/00
Inventor 张旭韩效钊汪小尧柳先超马朋飞
Owner HEFEI UNIV OF TECH
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