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Method and apparatus for desorbing material

A technology for desorption and target materials, applied in chemical instruments and methods, ion exchange treatment devices, improvement of process efficiency, etc.

Inactive Publication Date: 2006-07-19
CLEAN TEQ HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Another type of adsorption / desorption process is the continuous process

Method used

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  • Method and apparatus for desorbing material
  • Method and apparatus for desorbing material

Examples

Experimental program
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Effect test

example 1

[0102] This example describes the desorption of copper from a resin that is saturated during the treatment of a wastewater stream from a copper electroplating plant. displayed by using the Figure 4 The device in is designed to perform this example.

[0103] The copper concentration in the wash water is about 50 to 80 ppm, and the loading capacity of the resin suction reaches 28 to 32 g / l.

[0104] according to Figure 4 In the example shown in , the desorption test was carried out in a 150L plastic U-shaped column tube, and the loaded resin entered the column tube through the sleeve 5 located on the cover of the column tube. After desorption, the completely desorbed resin is removed from the column via the transfer tube and the intermediate chamber 7 once an hour. The resin was passed through the column at a rate of 20 L / hr.

[0105] A 7% sulfuric acid solution was used as the desorption solution. A desorption stream was pumped at a rate of approximately 22 L / hr into the...

example 2

[0110] This example shows the desorption of nickel from resin that was loaded during the adsorption recovery of nickel from high pressure ferrovanadium leached slurry. by using Figure 4 The device shown in is used to perform this example.

[0111] The elemental composition analysis of the loaded resins is shown in Table 2.1.

[0112] The desorption equipment consists of a U-shaped plastic test column with a capacity of 750 ml. The resin flows through the column at a rate of 100ml / hr.

[0113] A 10% hydrochloric acid solution was used as the desorption solution. The solution was pumped into the column via cannula 4 and valve 14 and flowed through the desorption and resorption zones at a rate of approximately 160 ml / hr. The desorption solution stream is divided into two unequal parts:

[0114] i) The wastewater solution stream, which after desorption is collected in an amount of approximately 100 ml / hr from the discharge device 3 and fed to the adsorption stage together wi...

example 3

[0120] This example shows the desorption of copper from a saturated resin which had been previously loaded during the adsorption recovery of copper from bulk filtrate. The copper concentration is between 2g / l and 6g / l.

[0121] The resin loading capacity in this copper test was 55 to 64 g / l. The resin flowed through the desorption column at a rate of approximately 100 ml / hr during the test.

[0122] according to Image 6 For the apparatus shown in , desorption experiments were performed in 750 ml borosilicate glass column tubes. The U-shaped column was fully insulated to maintain the temperature in the column between 60 and 70°C.

[0123] 10% sulfuric acid solution is used as the desorption agent, and an electric heater is used at the inlet 4 of the desorption solution to preheat it to 60-70°C. The flow of desorbent was maintained at a rate of approximately 75ml / hr.

[0124] In addition, after copper sulfide is precipitated, the preheated mother liquor is pumped into the ...

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Abstract

The present invention relates to a method and apparatus for the continuous countercurrent desorption of targeted materials including metals, non-metals and inorganic and / or organic compounds of thereof, wherein the desorption method is divided to the two modes namely: (I) desorption and (II) re-absorption. The desorption of the target material from the loaded resin using the fresh desorbent takes place in mode (I). According to mode (I) loaded resin moves upwardly in a chamber. According to mode (II) impurities are desorbed from resin and targeted material in solution can be re-absorbed. The resin moves downwardly in another chamber during mode (II). Concentrated eluates, which are suitable for the direct economical recovery of chemical elements and / or compounds thereof, can be produced using the present invention. The apparatus of the present invention includes desorption and re-absorption zones that are configured using a ''pipe-in-pipe'' construction or a U-shape construction.

Description

technical field [0001] The present invention relates to a method and apparatus for desorbing material from a loaded ion exchange resin. [0002] The ion exchange resin can be any suitable resin that can be doped with target materials including non-ferrous metals such as copper, nickel, and cobalt; noble metals such as gold and silver; and refractory metals such as molybdenum and tungsten. The exchange resin is also suitable for any other metals, non-metals, organic substances, inorganic substances and mixtures thereof. Background technique [0003] Currently, there is a wide choice of techniques for desorbing materials from resins. Some technologies are better suited to a particular application than others, so selecting the most suitable technology is an important factor in achieving high desorption rates and cost-effectiveness. [0004] In general, desorption processes for desorbing materials from resins can be carried out in batches or in continuous operation, which usua...

Claims

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Application Information

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IPC IPC(8): B01J47/10B01J49/00C22B3/24C22B3/42
CPCY02P10/20
Inventor N·宗托夫
Owner CLEAN TEQ HLDG
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