Method for recycling rhodium from rhodium octanoate mother liquor

A technology of rhodium octanoate and mother liquor, which is applied in the field of recovering rhodium from rhodium octanoate mother liquor, can solve the problems of complex purification process, large amount of rhodium ash, and low rhodium yield, and achieve simple process flow, low pollution and high recovery rate Effect

Inactive Publication Date: 2018-06-15
南京新奥环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the low yield of rhodium in the prior art, large amount of rhodium ash, low rhodium content, many impurities, complicated follow-up purification process, etc., the invention provides a method for reclaiming rhodium from octanoic acid rhodium mother liquor

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  • Method for recycling rhodium from rhodium octanoate mother liquor

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Effect test

Embodiment 1

[0036] The method for reclaiming rhodium from octanoic acid rhodium mother liquor, comprises the steps:

[0037] (1) mix octanoic acid rhodium mother liquor and acetic acid with mass ratio 1:1 and carry out pulping process, obtain slurry;

[0038] (2) After the slurry and wastewater are mixed, the flow ratio of the slurry and wastewater into the three channels is determined by the mass and calorific value, so that the calorific value of the slurry and wastewater is mixed at 4-6MJ / kg, and oxygen is introduced as an oxidant , carry out supercritical oxidation treatment, the material from the supercritical oxidation reactor is decompressed in multiple stages, and the gas-liquid separation is obtained to obtain a gas phase system and a non-gas phase system, and the non-gas phase system uses a ceramic ultrafiltration membrane for solid-liquid separation treatment to obtain the first solid phase, wherein the wastewater obtained from solid-liquid separation is returned to supercritic...

Embodiment 2

[0042] The method for reclaiming rhodium from octanoic acid rhodium mother liquor, comprises the steps:

[0043] (1) mix octanoic acid rhodium mother liquor and acetic acid with mass ratio 1:3 and carry out pulping process, obtain slurry;

[0044] (2) After the slurry and wastewater are mixed, the flow ratio of the slurry and wastewater into the three channels is determined by the mass and calorific value, so that the calorific value of the slurry and wastewater is mixed at 4-6MJ / kg, and oxygen is introduced as an oxidant , carry out supercritical oxidation treatment, after the material from the supercritical oxidation reactor undergoes multi-stage pressure reduction, gas-liquid separation is obtained to obtain a gas phase system and a non-gas phase system, and the non-gas phase system is filtered by an ultrafiltration membrane made of ceramic material, Obtain the first solid phase, wherein the waste water obtained by filtration is returned to the supercritical oxidation treat...

Embodiment 3

[0048] The method for reclaiming rhodium from octanoic acid rhodium mother liquor, comprises the steps:

[0049] (1) mix octanoic acid rhodium mother liquor and acetic acid with mass ratio 1:2 and carry out pulping process, obtain slurry;

[0050](2) After the slurry and wastewater are mixed, the flow ratio of the slurry and wastewater into the three channels is determined by the mass and calorific value, so that the calorific value of the slurry and wastewater is mixed at 4-6MJ / kg, and oxygen is introduced as an oxidant , carry out supercritical oxidation treatment, after the material from the supercritical oxidation reactor undergoes multi-stage pressure reduction, gas-liquid separation is obtained to obtain a gas phase system and a non-gas phase system, and the non-gas phase system is filtered by an ultrafiltration membrane made of ceramic material, Obtain the first solid phase, wherein the waste water obtained by filtration is returned to the supercritical oxidation treatm...

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Abstract

The invention relates to the technical field of precious metal recycling, and particularly discloses a method for recycling rhodium from rhodium octanoate mother liquor. The method includes the following steps that the rhodium octanoate mother liquor is subjected to slurry-mixing with acetic acid to obtain slurry; after the slurry, an oxidizing agent, and water are mixed, supercritical oxidation treatment is carried out, a gas-phase system and a non-gas-phase system are obtained through gas-liquid separation, the non-gas-phase system is subjected to solid-liquid separation treatment, and a first solid phase is obtained; the first solid phase is subjected to acid pickling treatment to obtain a second solid phase, a mixed system after acid pickling is collected to perform solid-liquid separation to obtain a third solid phase, and the second solid phase and the third solid phase are combined to obtain a rhodium crude product; and the rhodium crude product is washed to obtain the preciousmetal rhodium. The method is simple in technological process, low in pollution since organic matter is rapidly oxidized into innoxious substances such as carbon dioxide and nitrogen, short in processing time, low in energy consumption, and high in recovery rate, the loss of the precious metal rhodium is reduced, and the industrialization is easy.

Description

technical field [0001] The invention relates to the technical field of precious metal recovery, in particular to a method for recovering rhodium from rhodium octanoate mother liquor. Background technique [0002] The content of the precious metal rhodium in the earth's crust is only one part per billion, but its use value is very high. It is widely used in chemical industry, aerospace, electronic information and other manufacturing fields. Although the amount is small, it plays a very important role. Known as "industrial vitamins". Among them, rhodium catalysts have been widely used in the fields of petrochemical, pharmaceutical chemical, fine chemical and pharmaceutical chemical industries. It has outstanding performance in reactions such as chemicalization and ring closure, and is especially widely used in the synthesis of β-lactam drugs such as meropenem. And these rhodium catalysts cannot avoid being scrapped because the catalyst activity is reduced to a certain extent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/44
CPCC22B3/44C22B11/042Y02P10/20
Inventor 李超伟卢俊华马强狄昌淼
Owner 南京新奥环保技术有限公司
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