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MOF-Zr-EDTA material as well as preparation method and application thereof to cigarettes

A technology of mof-zr-edta and mof-zr, which is applied in the field of MOF-Zr-EDTA materials, can solve the problems of low removal rate of heavy metal ions and difficult separation, and achieve the convenience of large-scale industrial production, good application prospects, and cavity large size effect

Inactive Publication Date: 2019-05-17
CHINA TOBACCO HENAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Ethylenediaminetetraacetic acid (EDTA) is an important complexing agent, which can form stable water-soluble complexes with alkali metal ions, rare earth metal ions and transition metal ions. If it is used to adsorb heavy metal ions in the solution, the subsequent Separation is more difficult. If it is used as a filter additive, because it contacts with mainstream smoke only by surface adsorption, the removal rate of heavy metal ions is low

Method used

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  • MOF-Zr-EDTA material as well as preparation method and application thereof to cigarettes
  • MOF-Zr-EDTA material as well as preparation method and application thereof to cigarettes
  • MOF-Zr-EDTA material as well as preparation method and application thereof to cigarettes

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Embodiment 1

[0025] A preparation method of MOF-Zr-EDTA material:

[0026] (1) Preparation of MOF-Zr material: Take 4.2g of trimesibenzic acid (20mmol) and 19.4g of zirconyl chloride octahydrate (60mmol), add N,N-dimethylformamide and formic acid (v: v=1:1) The mixed solution was used as solvent (800mL), reacted at a constant temperature of 130 ℃ for 24h, cooled to room temperature, centrifuged to separate the product, and the product was washed 3 times with fresh N,N-dimethylformamide and methanol respectively , soaked in anhydrous N,N-dimethylformamide for three days, and changed the solvent once a day to exchange the remaining N,N-dimethylformamide molecules in the molecular pores, and then soaked in deionized water for three days. day, to exchange the remaining N,N-dimethylformamide molecules in the molecular pores, and finally in 50mL of anhydrous methanol (the anhydrous methanol used was added with magnesium scraps and refluxed for 4 hours before use, and then re-distilled) soaked i...

Embodiment 2

[0029] A preparation method of MOF-Zr-EDTA material, the difference from Example 1 is that the zirconium salt in step (1) is zirconyl nitrate, and the dosage is 13.9g (60mmol); in step (2), take 29.8g (0.08 mol) of ethylenediaminetetraacetic acid disodium salt was reacted with the prepared MOF-Zr material in 1L of deionized water. The reaction temperature was 50°C for 24 hours. The vacuum drying temperature was 70°C. After 48 h, the MOF-Zr-EDTA material B was obtained. .

Embodiment 3

[0031] A preparation method of MOF-Zr-EDTA material, the difference from Example 1 is that the zirconium salt in step (1) is zirconium tetrachloride, and the dosage is 14.0g (60mmol), and it is called Take 22.4g (0.06 mol) ethylenediaminetetraacetic acid disodium salt in 1L deionized water, and react with the prepared MOF-Zr material. The reaction temperature is 70°C, the reaction time is 36h, and the vacuum drying temperature is 80°C. The drying time was 24 hours, and the MOF-Zr-EDTA material C was obtained.

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Abstract

The invention belongs to the technical field of cigarette filter production, in particular to an MOF-Zr-EDTA material as well as a preparation method and application thereof to cigarettes. The MOF-Zr-EDTA material is prepared from mesi-tribenzoic acid and a metal zirconium salt, the MOF-Zr-EDTA material is prepared by interchange of carboxyl groups in MOF-Zr and ethylenediamine tetraacetic acid (EDTA), and the framework of the MOF-Zr material remains unchanged. Because of the pore structure, large specific surface area and large cavity size of the MOF-Zr material, active sites in EDTA molecules are more easily exposed, and the content of heavy metals in a solution and mainstream cigarette smoke can be significantly reduced. The preparation method is easy to operate, low in cost and convenient for large-scale industrial production, and shows a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of cigarette harm reduction, and in particular relates to a MOF-Zr-EDTA material capable of reducing heavy metal content in mainstream smoke and its application in cigarettes. Background technique [0002] Common harmful heavy metals in cigarette smoke include Ni, Pb, Cd, Cr, As, Se, and Hg. The harm they cause to smokers, in the final analysis, enters the human body through mainstream smoke in the form of aerosols or metal oxides. The study found that in the gas phase of mainstream smoke, except for Hg, the gas phase mobility of other heavy metals in the mainstream smoke of cigarettes is close to zero, that is, the heavy metals in cigarettes will basically not migrate into the gas phase of mainstream smoke of cigarettes; In the granular phase, the transfer rates of heavy metals Pb and Cd are relatively high, followed by As and Hg, and the transfer rates of Cr and Ni are the lowest. In the sidestream smoke ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/04A24D3/08
Inventor 楚文娟田海英邱建华顾亮李明哲高明奇刘超席高磊高桂园
Owner CHINA TOBACCO HENAN IND
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