Titanium extraction agent using inactivated saccharomyces cerevisiae and corresponding titanium extraction method

Abstract

This invention discloses a titanium extractant using inactivated brewer's yeast and a corresponding titanium extraction method. The extractant is obtained through the following steps: (1) adding beer and 5×10... 6 (1) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran to the volume of the mixture obtained in step (1); (2) After mixing, amplify the mixture obtained in step (2) in a thermostat at 30℃-32℃ and pH 6.8 for 72 hours; (3) Boil the brewer's yeast liquid obtained in step (3) for 5 minutes to inactivate it completely; centrifuge at a speed of not less than 4000 rpm for 5 minutes, and the obtained cell precipitate is the titanium extractant. The extractant provided by the present invention solves the problems of unsafe, environmentally unfriendly and costly methods of leaching titanium metal using sulfuric acid and other acid leaching methods in the prior art.

Description

Technical Field

[0001] This invention relates to the field of rare metal metallurgical technology, specifically providing a titanium extractant prepared using inactivated brewer's yeast, its preparation method, and a method for leaching titanium from strongly alkaline red mud with a pH of 12.1-13.0 using the extractant. Background Technology

[0002] Titanium, as an important strategic resource, occupies a pivotal position in the modern industrial system. It is a strategic foundational material in the fields of high-end manufacturing and green energy, and is becoming a core engine supporting strategic resource security, empowering dual carbon goals, and upgrading high-end industries.

[0003] Currently, the most traditional and primary method for extracting and recovering titanium from titanium-bearing ores is the use of sulfuric acid as a chemical reagent. For example, patent application No. 2015800373175, which includes three priorities (2014.07.08 NZ 627180; 2014.07.08 NZ627185; 2014.07.8 NZ 627187), discloses a method for recovering titanium dioxide, aluminum sulfate, and magnesium sulfate from particulate materials. This method includes: a. contacting the particulate material with sulfuric acid and heating it to form a sulfation mixture. A drawback of the aforementioned sulfuric acid-based titanium extraction process is that its environmental pollution is difficult to assess. Summary of the Invention

[0004] To address the aforementioned problems and current status of existing technologies, this invention provides a titanium extractant using inactivated brewer's yeast, its preparation method, and a method for extracting titanium from red mud using this extractant. The titanium extractant, possessing a large specific surface area and a negative charge, is prepared by activating and expanding inactivated brewer's yeast. The specific surface area and charge characteristics of this formulation enable the extraction of titanium from red mud. The formulation and its application provided by this invention effectively solve the safety and environmental hazards associated with existing acid leaching methods for titanium metal, such as sulfuric acid extraction.

[0005] Specifically, to achieve the above objectives, the present invention first provides a titanium extractant using inactivated brewer's yeast, wherein the extractant undergoes the following processing steps: (1) In a container, add beer and 5×10 ml of liquid bacteria at a volume ratio of 1:20. 6 Dormant brewer's yeast culture (number per mL); (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume of the mixture obtained in step (1); (3) After mixing, the mixture obtained in step (2) is aerated in a thermostat at 30℃-32℃ and at pH 6.8 for 72 hours; (4) Boil the brewer's yeast liquid obtained in step (3) for 5 minutes to inactivate it completely; centrifuge at a speed of not less than 4000 rpm for 5 minutes, and the obtained cell precipitate is the titanium extractant.

[0006] Furthermore, after 72 hours of propagation, the concentration of brewer's yeast was 2.87 × 10⁻⁶. 7 per mL.

[0007] Furthermore, after 72 hours of expansion, the sterilized brewer's yeast exhibited a complex multi-layered microporous structure, resulting in a final titanium extract with a specific surface area of ​​2254 m². 2 / m 3 (Based on theoretical calculations according to BET standard GB / T19587-2004).

[0008] Furthermore, the glucan and mannan within the cell wall of the sterilized brewer's yeast titanium extract carried a combined negative charge of 1.01 × 10⁻⁶. 4 C / mL, and lone electrons 2.08 × 10 17 per mL.

[0009] Therefore, the present invention also provides a method for preparing a titanium extractant using inactivated brewer's yeast, the method comprising the following steps: (1) Add beer and 5×10 ml of liquid bacteria to a container at a volume ratio of 1:20. 6 Dormant brewer's yeast culture (number per mL); (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume of the mixture obtained in step (1); (3) After mixing, the mixture obtained in step (2) is kept in a thermostat at 30℃-32℃ and at a pH of 6.8 for 72 hours for expansion; (4) Boil the brewer's yeast liquid obtained in step (3) for 5 minutes to inactivate it completely; centrifuge at a speed of not less than 4000 rpm for 5 minutes, and the obtained cell precipitate is the titanium extractant.

[0010] In step (3), the concentration of brewer's yeast obtained after expansion was 2.87 × 10⁻⁶. 7 per mL.

[0011] Furthermore, the present invention provides a specific method for using the above-mentioned titanium extractant, a method for leaching titanium from red mud.

[0012] Specifically, the extraction method includes the following steps: (1) Add the titanium extractant to red mud with a pH of 12.1-13.0. No pH or temperature treatment is required. Shake at a speed of not less than 150 rpm for 2 hours at room temperature in a shaker. The negative charge carried by the inactivated brewer's yeast titanium extractant is attracted by the number of coordination sites on the specific surface area at an electrostatic attraction of 0.8-1.2 μg / (cm²·min). 4+ Attracted to the cell wall surface; and through the enrichment of specific surface area coordination sites, effectively allowing the negatively charged unbonded electrons (lone pairs) to bind with Ti. 4+ Stable coordination occurs in orbital vacancies on 3d orbitals, forming ≡Ti-O-Cell or ≡Ti-N-Cell covalent bonds (coordination mode: oxygen and nitrogen atoms act as bridging atoms, connecting multiple titanium atoms to form a polyhedral structure, thereby forming a three-dimensional network structure through oxygen / nitrogen atom bridging, which has unique electronic delocalization characteristics). (2) Solid-liquid separation: centrifugation at a speed of not less than 4000 rpm for not less than 5 min to obtain titanium leaching. Among them, the titanium leaching recovery rate is above 95.44%.

[0013] The beneficial effects of adopting the aforementioned technical solution are as follows: This invention provides a titanium extraction agent utilizing inactivated brewer's yeast, based on the large specific surface area of ​​the inactivated brewer's yeast cell wall and the synergistic effect of its negative charge (lone electron pair) on titanium adsorption and coordination. The resulting coordination structure is: Ti 4+ +2:O¨-C(=O)-R-> [Ti(O..-C(=O)-R)2]. This results in a titanium leaching recovery rate of over 95.44%. Furthermore, this bacterium is not only environmentally friendly, non-toxic and harmless to humans and animals, and does not pollute the environment, but also, during its reproduction, it secretes β-glucan, mannan, eight amino acids, and various B vitamins, effectively providing beneficial elements to nature and humanity. Attached Figure Description

[0014] To better illustrate the present invention, detailed descriptions are provided below using examples.

[0015] Figure 1 This is a microscopic image of brewer's yeast cells after expansion during the preparation process of Example 1 of the titanium extractant using inactivated brewer's yeast provided by the present invention.

[0016] Figure 2 This is a microscopic image of titanium metal being leached during the extraction of titanium from red mud in Example 1 of a titanium extractant using inactivated brewer's yeast provided by the present invention. Detailed Implementation

[0017] To better illustrate the present invention, detailed descriptions are provided below using examples. Example 1

[0018] A method for preparing, expanding, and leaching titanium metal extractants using inactivated brewer's yeast includes the following processing steps: (1) In a container, add 3mL of beer and 60ml of 5×10 at a ratio of 1:20. 6 Dormant brewer's yeast cells / mL; (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume of the mixture in step (1); (3) Amplify by shaking in a thermostat at 30℃-32℃ and pH 6.8 for 72 hours; (4) Boil the expanded brewer's yeast for 5 minutes to inactivate it completely; centrifuge to separate it, and take the precipitated bacterial remains as brewer's yeast titanium extract; (5) Add the titanium extract of brewer's yeast strain to red mud with a pH of 12.1-13.0. No pH or temperature treatment is required. Shake at room temperature in the laboratory for 2 hours at a speed of not less than 150 rpm. The titanium leaching recovery rate is 95.44%.

[0019] Laboratory-related data: A) 20 grams of red mud were taken for the experiment. The titanium content was measured to be 5.7%, so the total titanium content was 0.057 × 20 g = 1.14 g. B) 1.0881g of titanium was extracted; C) The residual amount of titanium tailings after extraction is 0.0519g. Example 2

[0020] (1) In a container, add 3 mL of beer and 60 mL of 2.0×3 ppm beer at a volume ratio of 1:20. 6 dormant brewer's yeast culture (number per mL); (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume obtained in step (1); (3) Spread the mixture for 72 hours in a thermostat at 30℃-32℃ and at a pH of 6.8; (4) Boil the expanded brewer's yeast for 5 minutes to inactivate it completely; centrifuge to separate it, and take the precipitate as titanium extract of inactivated brewer's yeast; (5) Add the titanium extractant to red mud with a pH of 12.1-13.0. No treatment is required for pH and temperature. Shake at a speed of not less than 150 rpm for 2 hours using a laboratory room temperature shaker. The titanium leaching recovery rate is 95.83%.

[0021] Laboratory-related data: A) 20 grams of red mud were taken for the experiment. The titanium content was measured to be 5.7%, and the total titanium content was 0.057 × 20 g = 1.14 g. B) 1.0925g of titanium was extracted; C) The residual amount of titanium tailings after extraction is 0.0475g. Example 3

[0022] (1) In a container, add 3 mL of beer and 60 mL of 2.0×3 [units of liquid] at a volume ratio of 1:20. 6 dormant brewer's yeast cells / mL; (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume of step (1); (3) Spread the mixture for 72 hours in a thermostat at 30℃-32℃ and at a pH of 6.8; (4) Boil the amplified strain for 5 minutes to completely inactivate it; centrifuge to separate it, and take the precipitate as titanium extract of inactivated brewer's yeast; (5) Add the titanium extractant to red mud with a pH of 12.1-13.0. No treatment is required for pH and temperature. Shake at a speed of not less than 150 rpm for 2 hours using a laboratory room temperature shaker. The titanium leaching recovery rate is 95.64%.

[0023] Laboratory-related data: A) 20 grams of red mud were used in the experiment, and the total titanium content was 0.057 × 20 g = 1.14 g; B) 1.0904g of titanium was extracted; C) The residual amount of titanium tailings after extraction is 0.0496g.

[0024] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A titanium extractant utilizing inactivated brewer's yeast, characterized in that, The titanium extractant is obtained through the following steps: (1) Add beer and 5×10 ml of liquid bacteria to a container at a volume ratio of 1:

20. 6 Dormant brewer's yeast culture (number per mL); (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume of the mixture obtained in step (1); (3) After mixing, the mixture obtained in step (2) is kept in a thermostat at 30℃-32℃ and at a pH of 6.8 for 72 hours for expansion; (4) Boil the brewer's yeast liquid obtained in step (3) for 5 minutes to inactivate it completely; centrifuge at a speed of not less than 4000 rpm for 5 minutes, and the obtained cell precipitate is the titanium extractant.

2. The titanium extractant using inactivated brewer's yeast according to claim 1, characterized in that, The concentration of brewer's yeast obtained after expansion in step (3) is 2.87 × 10⁻⁶. 7 per mL.

3. A titanium extractant using inactivated brewer's yeast according to claim 1 or 2, characterized in that, The titanium extractant has a complex multilayer microporous structure with a specific surface area of ​​2254 m² / m³.

4. A titanium extractant using inactivated brewer's yeast according to any one of claims 1-3, characterized in that, The titanium extractant is negatively charged with 1.01 × 10⁻⁶. 4 C / mL.

5. A method for preparing a titanium extractant using inactivated brewer's yeast, characterized in that, The method includes the following steps: (1) Add beer and 5×10 ml of liquid bacteria to a container at a volume ratio of 1:

20. 6 Dormant brewer's yeast culture (number per mL); (2) Add 2.1-4 g / L sugar, 5.2-7 g / L soybean residue and 5-7 g / L rice bran according to the volume of the mixture obtained in step (1); (3) After mixing, the mixture obtained in step (2) is kept in a thermostat at 30℃-32℃ and at a pH of 6.8 for 72 hours for expansion; (4) Boil the brewer's yeast liquid obtained in step (3) for 5 minutes to inactivate it completely; centrifuge at a speed of not less than 4000 rpm for 5 minutes, and the obtained cell precipitate is the titanium extractant.

6. The method for preparing a titanium extractant using inactivated brewer's yeast according to claim 5, characterized in that, The concentration of brewer's yeast obtained after expansion in step (3) is 2.87 × 10⁻⁶. 7 per mL.

7. A method for extracting titanium metal from red mud by leaching, characterized in that, Titanium was extracted from red mud using a titanium extractant based on inactivated brewer's yeast as described in claim 1.

8. The method for extracting titanium metal from red mud according to claim 7, characterized in that, The method includes the following processing steps: 1) Add the titanium extractant to red mud with a pH of 12.1-13.0 and shake it in a shaker at a speed of not less than 150 rpm for 2 hours at room temperature; 2) Centrifuge at a speed of not less than 4000 rpm for at least 5 minutes to obtain titanium leaching.

9. The method for extracting titanium metal from red mud according to claim 8, characterized in that, The leaching recovery rate of the titanium metal is above 95.44%.

Images