Titanium-based metal-organic framework adsorption material, preparation method therefor and application in separation of palladium

An organic framework and adsorption material technology, applied in the field of titanium-based metal-organic framework adsorption material for selective separation of palladium and the field of preparation thereof, can solve the problems of reduced palladium recovery rate, numerous raw material components, complicated methods and the like, and achieves saving production costs, The effect of shortening material preparation time and simple and easy preparation method

Active Publication Date: 2019-11-01
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The different forms of palladium in palladium-containing waste liquid is one of the important reasons for the decrease of palladium recovery rate
[0004] CN107130114A discloses a method for separating and recovering palladium in palladium-containing waste liquid, adopting chitosan derivatives and palladium waste liquid to form flocs to realize the separation of palladium and waste liquid, and the above-mentioned method is more loaded down with trivial details
CN 109438719 A discloses a modified metal-organic framework composite material and a preparation method. This patent proposes the concept of using a metal-organic framework modified material as an adsorption material, but the modification operation of the metal-organic framework material used in this technical solution Complex, with a wide variety of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to method A, add 140mL of mixed solvent (composed of 100mL of anhydrous DMF and 40mL of anhydrous methanol) into the round bottom flask, then add 11.5g of 2-aminoterephthalic acid and 12.5mL of tetrabutyl titanate in sequence, and heat Stir and reflux at 120°C for 12 hours, cool to room temperature, add 40mL of sodium alginate aqueous solution with a mass concentration of 1% to the mixed solution, mix well, add hydrochloric acid dropwise to adjust the pH value to below 2, and obtain a yellow precipitate by suction filtration, followed by Rinse with washing solution DMF, methanol, water, and acetone, and dry the obtained solid under vacuum at 100°C for 8 hours to prepare a titanium-based metal-organic framework adsorption material, labeled as Ti-MOF1.

Embodiment 2

[0027] The operation steps are the same as in Example 1, the difference is that when preparing the titanium-based metal-organic framework adsorption material, 11 mL of isopropyl titanate is used as the titanium metal source instead of tetrabutyl titanate, and the finally obtained titanium-based metal-organic framework adsorption material is labeled For Ti-MOF2.

Embodiment 3

[0029] According to method B, 5.5g of 2-aminoterephthalic acid and 2.5mL of tetrabutyl titanate were added to a mixed solvent consisting of 20mL of anhydrous DMF and 20mL of anhydrous methanol, ultrasonically dispersed for 10 minutes, and the mixed solution was transferred to In a stainless steel reaction kettle equipped with a polytetrafluoroethylene liner, stand at 150°C for 16 hours, cool to room temperature and then centrifuge. The obtained yellow precipitate is soaked with washing liquid DMF and methanol in turn, and then placed in a vacuum drying oven Vacuum dry at 100°C for 12 hours; ultrasonically disperse the dried solid in 50mL of water, add 10mL of sodium alginate aqueous solution with a mass concentration of 0.5% to the dispersion, add hydrochloric acid dropwise to adjust the pH value to below 2, and continue stirring for 12 hours , the solid obtained after suction filtration was soaked with washing liquid water and acetone in turn, and then vacuum-dried at 100°C fo...

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Abstract

The invention discloses a titanium-based metal-organic framework adsorption material, a preparation method therefor and an application in separation of palladium. The adsorption material is prepared from a titanium-based metal-organic framework and alginic acid. The invention further discloses two preparation methods for the adsorption material. The material prepared through an optimized preparation process has high adsorption rate to palladium ions and can be reused, the preparation process is simple, the reaction conditions are mild, and the production cost is low.

Description

technical field [0001] The invention belongs to the field of separation, recovery and utilization of precious metals, and in particular relates to a titanium-based metal-organic framework adsorption material for selectively separating palladium, a preparation method and application thereof. Background technique [0002] Palladium is a platinum group metal that can be used in electroplating, catalysts, dental alloys, brazing alloys and various contact materials. It has unique physical and chemical properties and is widely used in chemical catalysis, aerospace, microelectronics technology, exhaust gas purification It plays a key and central role in cutting-edge science and modern industries such as petrochemical, electrical and electronic, environmental protection, biopharmaceuticals, and national defense. With the increasing importance of environmental protection and the in-depth development and application of catalysts, the demand for metal palladium is growing rapidly. Fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/226
Inventor 冯建李敏肖鹏孟晓静蒋松山唐思汪麒林
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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