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Method for recycling palladium from organic waste liquid

A technology of organic waste liquid and solid phase extraction agent, applied in the field of palladium recovery, to achieve the effect of easy operation

Active Publication Date: 2013-12-11
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is suitable for the palladium-containing organic waste liquid produced in the production process of homogeneous catalysts, and solves the problem of recovering palladium from the organic phase. Recover palladium in organic waste liquid at the same time, realizing the effect of recycling while producing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1. To introduce -SH and The silica gel of the group is used as the solid-phase extraction agent, and 1g of the solid-phase extraction agent is packed into a Φ13mm×300mm glass column to form a solid-phase extraction column. A peristaltic pump is used to extract 100g of palladium-containing organic waste liquid generated during the production process of the homogeneous catalyst. Inject into the solid-phase extraction column at a flow rate of 1mL / min, and extract the palladium in the palladium-containing organic waste liquid into the solid-phase extraction agent under the condition of 25° C. to obtain a palladium-containing solid-phase extraction agent; the palladium-containing The mass content of palladium in the organic waste liquid is 142ppm;

[0026] Step 2, after taking out the palladium-containing solid-phase extraction agent described in step 1, place it in an oven, dry to constant weight, then transfer the dried palladium-containing solid-phase extraction age...

Embodiment 2

[0031] Step 1. To introduce -SH, with The silica gel of the group is used as the solid phase extraction agent. Fill 30g of the solid phase extraction agent into a Φ25mm×300mm glass column to form a solid phase extraction column. Use a peristaltic pump to extract 3000g of palladium-containing organic waste liquid generated during the production process of the homogeneous catalyst. Inject into the solid-phase extraction column at a flow rate of 10mL / min, extract the palladium in the palladium-containing organic waste liquid into the solid-phase extraction agent under the condition of 20° C. to obtain the palladium-containing solid-phase extraction agent; the palladium-containing The mass content of palladium in the organic waste liquid is 142ppm;

[0032] Step 2, after taking out the palladium-containing solid-phase extraction agent described in step 1, place it in an oven, dry to constant weight, then transfer the dried palladium-containing solid-phase extraction agent to a ...

Embodiment 3

[0037] Step 1. To introduce -SH and Silica gel with two groups is used as the solid phase extraction agent, and 1g of the solid phase extraction agent is packed into a Φ13mm×300mm glass column to form a solid phase extraction column, and the palladium-containing organic waste generated during the production process of the homogeneous catalyst is collected by a peristaltic pump. Liquid 1000g injects in the solid-phase extraction column at the flow velocity of 5mL / min, under the condition that temperature is 50 ℃, extract the palladium in the palladium-containing organic waste liquid into the solid-phase extraction agent, obtain the palladium-containing solid-phase extraction agent; The mass content of palladium in palladium-containing organic waste liquid is 10ppm;

[0038] Step 2, after taking out the palladium-containing solid-phase extraction agent described in step 1, place it in an oven, dry to constant weight, then transfer the dried palladium-containing solid-phase extr...

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Abstract

The invention discloses a method for recycling palladium from an organic waste liquid. The method comprises the following steps: firstly, extracting palladium from the palladium-containing organic waste liquid produced in the production process of a homogeneous catalyst into a solid-phase extractant by a solid-phase extraction method, so as to obtain a palladium-containing solid-phase extractant; secondly, drying the palladium-containing solid-phase extractant, adding the dried palladium-containing solid-phase extractant into an acidic solvent, refluxing and stirring so as to transfer the palladium from the solid-phase extractant into the acidic solvent, filtering to obtain an H2PdCl4 solution; thirdly, performing repeated purification for 2 to 5 times by a conventional ammonia complexing and hydrochloric acidifying method to obtain a palladium solution; and finally, reducing the palladium solution to obtain metal palladium powder. The method is applicable to the palladium-containing organic waste liquid produced in the production process of the homogeneous catalyst; through the adoption of the method, the problem of recycling palladium from organic phase is solved; the method is simple in operation; any pretreatment on the waste liquid is not required; and the effect of producing while recycling can be achieved.

Description

technical field [0001] The invention belongs to the technical field of precious metal recovery, in particular to a method for recovering palladium from organic waste liquid. Background technique [0002] Pd complexes formed by noble metal Pd and organic compounds such as triphenylphosphine and octanoic acid are widely used in the chemical industry as homogeneous catalysts. However, in the process of preparing the catalyst, Pd is more or less lost. Therefore, recovering Pd from the waste liquid produced during the preparation of catalysts not only has economic benefits, but also can reduce environmental pollution. [0003] There are a lot of data about reclaiming Pd from Pd-containing wastewater, yet the method proposed by most of the data is applicable to palladium-containing inorganic phase aqueous solution, as patent CN1388256A provides a kind of utilization of bacterial cells to reclaim from low-concentration palladium ion waste liquid The method for palladium, patent C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/00B01D15/08
CPCY02P10/20
Inventor 崔静文永忠张之翔
Owner XIAN CATALYST NEW MATERIALS CO LTD
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