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Method for preparing aluminium benzoate from calcium-free chromium slag

A calcium-chromium-free slag, aluminum benzoate technology, applied in chemical instruments and methods, process efficiency improvement, compounds containing periodic table Group 3/13 elements, etc. increase and other issues, to achieve high utilization value, achieve energy saving and consumption reduction, and increase the effect of material recycling.

Inactive Publication Date: 2014-04-30
陕西绿泉环保科技有限公司
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Benefits of technology

This new method described by this patented technology allows for better separation between metals like iron and copper during production compared to previous methods that took advantage of these resources. It also improves how much material was used before disposal instead of being reused or discarded altogether. Additionally, there's an added benefits because it makes more efficient use of valuable metal while reducing waste generation.

Problems solved by technology

This patented technical problem addressed by this patents relates to finding ways to dispose of harmful chrome slags generated from various industries like iron making processes without creation of new ones that could potentially become more expensive than traditional methods.

Method used

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  • Method for preparing aluminium benzoate from calcium-free chromium slag

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Embodiment Construction

[0019] The following are specific examples of the present invention, and further describe the technical solution of the present invention, but the protection scope of the present invention is not limited to these examples. All changes or equivalent substitutions that do not depart from the concept of the present invention are included in the protection scope of the present invention.

[0020] 1. Crush 100Kg of calcium-free chromium slag (provided by Hubei Zhenhua Chemical Co., Ltd.) to 320 mesh.

[0021] 2. Soak in 300Kg water for the first time, stir for 2 hours, and filter; soak in 200Kg water for the second time, stir for 2 hours, filter, and combine the second soaking solution.

[0022] 3. Heat the alkaline soaking solution in the previous step to 60-70°C, add a newly prepared sodium sulfide solution with a concentration of 30% (mass percentage), and reduce hexavalent chromium to trivalent chromium precipitation until no precipitation occurs, 30 The consumption of % sodiu...

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Abstract

The invention discloses a method for preparing aluminium benzoate from calcium-free chromium slag. The method comprises the following steps: (1) crushing calcium-free chromium slag; (2) adding water and leaching the chromium slag, and standing the leaching solution for the future use; (3) reducing hexavalent chromium in the leaching solution to trivalent chromium precipitates; (4) separating iron precipitates and aluminium precipitates from the chromium slag treated in the step (2); separating aluminium solution from the precipitates in the step (4); (6) adding ammonium benzoate solution in the aluminium solution obtained in the step (5), so as to generate aluminium benzoate. The method disclosed by the invention is capable of detoxicating the chromium slag containing hexavalent chromium, and converting the contained aluminium to another aluminium benzoate with a higher added value, thus turning harm into good, and turning waste into wealth.

Description

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Claims

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Application Information

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Owner 陕西绿泉环保科技有限公司
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