Regeneration method of copper molybdenum saturation resin

A resin and copper-molybdenum technology is applied in the field of regeneration of copper-molybdenum saturated resins to achieve the effects of reducing production costs, facilitating popularization and application, and uncomplicated operation.

Inactive Publication Date: 2019-06-25
HUNAN MAOTIAN SHIJIE NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the anion exchange resin is saturated, in order to make it reusable, the resin needs to be regenerated,

Method used

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  • Regeneration method of copper molybdenum saturation resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This example provides a regeneration method of copper-molybdenum saturated resin, the process is as follows figure 1 As shown, the steps include:

[0030] (1) After soaking the copper-molybdenum saturated resin with a strong acid and an oxidizing agent, carry out the first suction filtration;

[0031] (2) After washing the resin treated in step (1) with water, perform suction filtration for the second time;

[0032] (3) After alkali immersion of the resin treated in step (2), carry out suction filtration for the third time;

[0033] (4) After washing the resin treated in step (3) with water, perform suction filtration for the fourth time;

[0034] (5) Regenerate the resin treated in step (4) with a strong acid.

[0035] Wherein, the acid used is at least one of sulfuric acid, hydrochloric acid and nitric acid, and the concentration is 0.5-2 mol / L.

[0036] The oxidant is hydrogen peroxide or sodium hypochlorite with a volume concentration of 1-5 vol%.

[0037] The ...

Embodiment 2

[0042] In this example, the copper-removing D314 resin saturated by adsorption in a factory is selected. The suspended matter is washed with pure water and then suction-filtered. The dry basis rate is 43.64%. The regeneration is carried out through the following steps:

[0043] (1) 25 g of the above-mentioned D314 copper-molybdenum saturated resin was mixed with 1mol / L of H 2 SO 4 40mL and 3% (volume) H 2 o 2 Suction filtration for the first time after soaking for 20 hours to obtain oxidized resin and acidic oxidation solution;

[0044] (2) washing the resin treated in step (1) with water until the pH of the washing water is 3, and performing suction filtration for the second time;

[0045] (3) Soak the resin treated in step (2) with 50mL of 2mol / L NaOH for 2.5h, then perform suction filtration for the third time;

[0046] (4) washing the resin treated in step (3) with water until the pH of the washing water is 9, and then performing suction filtration for the fourth time...

Embodiment 3

[0052] In this example, the copper-removing D201 resin saturated by adsorption in a factory is selected. The suspended matter is washed with pure water and then suction-filtered. The dry basis rate is 40.1%. The regeneration is carried out through the following steps:

[0053] (1) 25 g of the above-mentioned D201 copper-molybdenum saturated resin was mixed with 1mol / L of H 2 SO 4 40mL and 2% (volume) H 2 o 2 Suction filtration for the first time after soaking for 20 hours to obtain oxidized resin and acidic oxidation solution;

[0054] (2) washing the resin treated in step (1) with water until the pH of the washing water is 3, and performing suction filtration for the second time;

[0055](3) Soak the resin treated in step (2) with 40mL 1mol / L NaOH for 2.5h, then perform suction filtration for the third time, then soak the resin with 40mL 1mol / L NaOH for 2.5h, then perform the fourth second suction filtration;

[0056] (4) washing the resin treated in step (3) with water...

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Abstract

The technical scheme provides a regeneration method of copper molybdenum saturation resin. The method is characterized in that the copper molybdenum saturation resin is soaked in acid and an oxidant and then is subjected to water washing and alkaline soaking, and finally, the resin is regenerated through acid. According to the technical scheme, the method has the advantages that the copper molybdenum saturation resin in the tungsten smelting process is effectively regenerated, and the regenerated resin has the same adsorbing effect as new resin, so that the resin can be recycled, and as a result, the production cost is decreased; the method is short in processes, easy to operate and free from expensive equipment; agents used in the method are normal and low in price; and the method is suitable for industrial popularization and application.

Description

technical field [0001] The invention belongs to the technical field of ion exchange resins, in particular to a method for regenerating copper-molybdenum saturated resins. Background technique [0002] In the tungsten smelting process, in order to remove molybdenum, the industry usually uses copper salts through selective precipitation. This method utilizes the MoS 4 2－ with Cu 2+ The affinity is greater than that of MoO 4 2－ with Cu 2+ The characteristics of MoO 4 2－ Convert to MoS 4 2－ , followed by the addition of Cu 2+ with MoS 4 2－ Combined to form copper and molybdenum precipitates, thereby removing the molybdenum. This method has high molybdenum removal efficiency, but after removing molybdenum, the trace amount of copper in the solution is converted into Cu(HS) 3 - and CuS(HS) 3 3- If it exists in the form of complex anions, it needs to be adsorbed by an anion exchange resin column to remove copper, otherwise the copper in subsequent products will exc...

Claims

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Application Information

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IPC IPC(8): C22B3/42C22B34/36
CPCY02P10/20
Inventor 雷吟春肖连生欧阳海波蒋纯曹育龙李湘军王琪王一舟徐园园
Owner HUNAN MAOTIAN SHIJIE NEW MATERIALS CO LTD
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