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Method for preparing tara tannin germanium extracting agent

A technology of tara tannin and extractant, which is applied in the field of preparation of tara tannin germanium extractant, and can solve problems such as high acidity, limited application, and difficulty in stripping

Inactive Publication Date: 2013-04-24
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] In foreign countries, Lix63 (hydroximes) and Kelex-100 (8-hydroxyquinoline derivatives) have been used to extract germanium from zinc sulfate, and good results have been obtained, but the concentration of the extractant is high, the acidity is high, and the reaction Difficult to extract, application is limited

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  • Method for preparing tara tannin germanium extracting agent
  • Method for preparing tara tannin germanium extracting agent
  • Method for preparing tara tannin germanium extracting agent

Examples

Experimental program
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Effect test

Embodiment 1

[0062] 1. Preparation and method of Tara Tannin 1# germanium extractant. It is characterized in that it comprises the following steps:

[0063] The first step is commercial tara powder raw material, tannin content ≥ 48%, moisture content ≤ 12%, 80-100 mesh.

[0064] In the second step, the Tara powder extraction process adopts a low-temperature two-tank three-step dual-dynamic countercurrent extraction process. Extraction temperature: 35-45°C, extraction time: 0.5-1hr / step, extraction solid-liquid ratio: 1:3-6 / step.

[0065] The third step is to add the Tara powder raw material and water into the double dynamic extractor at a solid-liquid ratio of 1:4-6 according to the above extraction process, heat up, keep warm, and extract to prepare the Tara powder solid-liquid extraction mixture.

[0066] In the fourth step, the solid-liquid separation of the Tara powder solid-liquid extraction mixture adopts the process of spiral sedimentation centrifugal separation (horizontal spiral...

Embodiment 2

[0100] Weigh 500kg of 80-100 mesh tara powder and place it in a 3000-liter glass-lined or stainless steel dynamic extraction tank with stirring and condenser. The extraction process of tara powder adopts a low-temperature two-tank three-step double dynamic extraction process.

[0101] One-step extraction temperature: 40°C, two-step extraction: 45°C, three-step extraction: 50°C.

[0102] One-step extraction time: 0.5hr, two-step extraction time: 0.5hr, three-step extraction extraction time: 0.5hr.

[0103] One-step extraction solid-liquid ratio: 1:5, one-step extraction solid-liquid ratio: 1:4, one-step extraction solid-liquid ratio: 1:3.

[0104] According to the above-mentioned extraction process, the raw materials of Tara powder and water are added into a double dynamic extractor with a solid-liquid ratio of 1:3-5, heated, kept warm, and extracted to prepare a solid-liquid-water extraction mixture of Tara powder.

[0105] Tara powder solid-liquid-water extraction mixed liqu...

Embodiment 3

[0115] Weigh 520kg of 80-100 mesh tara powder and place it in a 3000-liter glass-lined or stainless steel dynamic extraction tank with stirring and condenser. The extraction process of tara powder adopts a low-temperature two-tank three-step double dynamic extraction process.

[0116] One-step extraction temperature: 38°C, two-step extraction: 42°C, three-step extraction: 45°C.

[0117] One-step extraction time: 0.5hr, two-step extraction time: 0.5hr, three-step extraction extraction time: 0.4hr.

[0118] One-step extraction solid-liquid ratio: 1:6, one-step extraction solid-liquid ratio: 1:5, one-step extraction solid-liquid ratio: 1:4.

[0119] According to the above extraction process, the Tara powder raw material and 70% methanol solution are added to the double dynamic extractor at a solid-to-liquid ratio of 1:4-6, heated, kept warm, and extracted to prepare the Tara powder solid-liquid methanol extraction mixture.

[0120] Tara powder solid-liquid extraction mixed liqui...

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Abstract

The invention relates to a method for preparing a tara tannin germanium extracting agent. In the method, tara powder is taken as a raw material, water extraction, methanol extraction and ethanol extraction processes are correspondingly adopted according to different processes, and different combined processes and equipment such as tara powder dual-dynamic countercurrent leaching, spiral settling centrifugal separation, foam separation, settling separation, plate-frame pressure filtration, refining, mixing, concentration, drying and the like are combined, so that a tara tannin No.1 germanium extracting agent, a tara tannin No.2 germanium extracting agent and a tara tannin No.3 germanium extracting agent are respectively prepared, and are mainly used for extracting and recovering germanium metal. The using amount of the tara tannin germanium extracting agent is 20 to 25 times germanium content, and the leaching rate of the germanium is over 98 percent.

Description

Technical field: [0001] The present invention relates to the preparation and method of tara tannin germanium extractant, which includes the preparation and processing of tara tannin 1# germanium extractant, tara tannin 2# germanium extractant, and tara tannin 3# germanium extractant. method. Background technique: [0002] Today, the flotation of rare and precious metals in my country has formed an independent industrial system and national security strategy. For example, the industrial production of lead-zinc ore wet-process germanium extraction has always used the process of tannic acid precipitation of germanium. With the development of construction and the demand of foreign trade, tannic acid has become a short-term shortage material, which is expensive and in short supply. At the end of 2008, the sales price of industrial tannic acid used in the flotation of rare metals in lead-zinc ore once rose to 80,000 yuan / ton , This has seriously affected the domestic and foreign sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B41/00C22B3/16C07G99/00
CPCY02P10/234Y02P10/20
Inventor 孙先玉孙博张宗和秦清王重阳王少龙
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY