Hydroximic acid-metal hydroxide coordination complex and preparation and application thereof

Patent metadata

Field	Value
Publication number	US-12180236-B2
Application number	US-201817270961-A
Country	US
Kind code	B2
Filing date	Aug 29, 2018
Priority date	Aug 29, 2018
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A hydroxamic acid-metal hydroxide coordination complex and preparation and application thereof are disclosed. The hydroxamic acid-metal hydroxide coordination complex is formed by a coordination of hydroxamic acid with divalent or higher valent metal ions under an alkaline condition. The hydroxamic acid-metal hydroxide coordination complex has a strong selectivity and a strong collection ability for metal oxide minerals such as tungsten-containing minerals, ilmenite, rutile, cassiterite, and rare earth. The preparation method is simple and low in costs, and is beneficial to industrialized production.

First claim

What is claimed is:

1. A preparation method of a hydroxamic acid-metal hydroxide coordination complex, comprising: performing a coordination reaction between hydroxamic acid and divalent or higher valent metal ions in an alkaline solution system to obtain the hydroxamic acid-metal hydroxide coordination complex; wherein
the hydroxamic acid has a structure of formula 1, and the formula 1 is expressed as:

wherein R is a hydrophobic organic group, wherein after the coordination reaction is completed, the hydroxamic acid-metal hydroxide coordination complex is separated and purified by a carrier adsorption-foam floatation method.

2. The preparation method according to claim 1 , wherein R is an aliphatic hydrocarbon radical or an aryl.

3. The preparation method according to claim 2 , wherein R is a C 4 -C 12 alkyl, a C 4 -C 12 unsaturated aliphatic hydrocarbon radical, phenyl, or substituted phenyl.

4. The preparation method according to claim 3 , wherein R is the phenyl.

5. The preparation method according to claim 1 , wherein the divalent or higher valent metal ions comprise at least one of Pb 2+ , Ca 2+ , Mn 2+ , Cu 2+ , Fe 3+ , and Al 3+ .

6. The preparation method according to claim 5 , wherein the divalent metal ions are Pb 2+ .

7. The preparation method according to claim 1 , wherein a coordination mole ratio of the divalent or higher valent metal ions to the hydroxamic acid is (1-4):(1-5).

8. The preparation method according to claim 7 , wherein the coordination mole ratio of the divalent or higher valent metal ions to the hydroxamic acid is (1-2):(1-3).

9. The preparation method according to claim 1 , wherein a pH value of the alkaline solution system is 8-11.

10. The preparation method according to claim 9 , wherein the pH value of the alkaline solution system is 8.5-9.5.

11. The preparation method according to claim 1 , wherein a temperature of the coordination reaction is 20-80° C., and a reaction time is 0.5-6 hours.

12. The preparation method according to claim 11 , wherein the temperature of the coordination reaction is 55-65° C., and the reaction time is 1-2 hours.

13. The preparation method according to claim 1 , wherein the carrier adsorption-foam floatation method comprises the steps of:
adsorbing the hydroxamic acid-metal hydroxide coordination complex in a solution system by carrier particles;
after the step of adsorbing is completed, recovering the carrier particles loading the hydroxamic acid-metal hydroxide coordination complex through a foam floatation; and
obtaining a hydroxamic acid-metal coordination complex solution by an ultrasonic washing of the carrier particles loading the hydroxamic acid-metal hydroxide coordination complex.

14. The preparation method according to claim 13 , wherein the carrier particles are quartz particles with a particle size of 10-37 μm.

15. The preparation method according to claim 13 , wherein absolute ethyl alcohol is used as a washing agent for the ultrasonic washing.

Assignees

• Univ Central South

Inventors

• Hu Yuehua
• Sun Wei
• Han Haisheng
• Wei Zhao
• Wang Jianjun
• Wang Ruolin

Classifications

• C07F11/005

  compounds without a metal-carbon linkage · CPC title

• C07F7/28

  Titanium compounds · CPC title

• C07F7/2224

  Compounds having one or more tin-oxygen linkages · CPC title

• C01G41/02

  Oxides; Hydroxides · CPC title

• C01G23/0475

  Purification · CPC title