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Use of metal-accumulating plants for the preparation of catalysts useful in chemical reactions

A catalyst and application technology, applied in the field of metal accumulating plants, can solve problems such as environmental harm and high extraction cost, and achieve the effect of avoiding emissions

Active Publication Date: 2016-01-27
CENT NAT DE LA RECHERCHE SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A considerable number of them require an intermediate liquid-liquid extraction stage, which inevitably leads to the use of organic solvents, which are harmful to the environment and have high extraction costs

Method used

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  • Use of metal-accumulating plants for the preparation of catalysts useful in chemical reactions
  • Use of metal-accumulating plants for the preparation of catalysts useful in chemical reactions
  • Use of metal-accumulating plants for the preparation of catalysts useful in chemical reactions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0374] Example 1: Preparation of a composition comprising a metal catalyst whose metal is Zn

[0375] 1.1: Obtain crude catalyst

[0376] Dehydrated and pulverized leaves 30.03 g of Cerulean indica originating from the soil of the mine in Avnières were tested by the Escarré method (zinc reagent test) to measure the level of zinc present in the dry matter (in used and calcined In sample: 420 mg or 2 mmol: average level, depending on the site where the leaves were collected). The dry matter was then taken up in 20 mL of 1N hydrochloric acid.

[0377] Note: Dehydration is either by calcination (about 2 hours at 300°C: then ash is obtained), or by heating at 100°C under vacuum for 4-5 hours followed by grinding with a mortar). The quality of the dry matter is then different (more organic product degradation and loss by calcination, see Table II below).

[0378] Table II

[0379]

[0380] The above values ​​are those obtained after treatment with 1N HCl and filtration.

[0...

Embodiment 2

[0452] Example 2: Analysis of zinc in plant leaves after dehydration by UV-visible spectrophotometry (test with zinc reagents, according to CEFE:centred'écologiefonctionnelle etévolutive, Hélène Frérotet Bruno Buatois)

[0453] Target:

[0454] The zinc concentration in plant samples was measured after dissolving the metal in acid, adding a colorimetric reagent, and analyzing the intensity of staining by UV-visible spectrophotometry, depending on the amount of zinc in the sample.

[0455] definition:

[0456] Zinc reagent =[α-(2-Hydroxy-5-sulfophenylazo)benzylidene]hydrazino-2-benzoic acid monosodium salt

[0457]

[0458] C 20 h 15 N 4 NaO 6 S=462.41

[0459] g.mol -1

[0460] Appearance: purple or dark red powder

[0461] Absorbance: >0.375 (about 490nm)

[0462] Sulfated Ash: 15-25%

[0463] Zinc reagent is a chelating agent for metals (Cu, Zn, Pb, Cd, Fe, Mn, Ni, Co, Al, etc.). Zinc chelation occurs at pH 8.5-9.5. At these pH values, the color of the aque...

Embodiment 3

[0543] Example 3: Reaction utilizing the zinc catalyst of Example 1

[0544] 3.1: Halogenation of alcohols using catalysts whose metal is Zn

[0545] Examples of Secondary Alcohols (General Procedure):

[0546] At 25° C., 0.5-2 mmol, especially 1 mmol, of alcohol (depending on the alcohol used) is added to the reaction mixture of example 1.1 or 1.2.

[0547] The average stirring time was 8 hours at 20°C. Chlorinated derivatives can be isolated by adding petroleum ether, extracting, washing with sodium bicarbonate solution, drying over calcium chloride and removing petroleum ether.

[0548] Bear Stearns test and GCMS analysis (VARIANChrompackCP3800GasChromatography / VarianMSSaturn2000-Colonneoptima5; 30m-0.25μ-flow rate: 1mL / min-program: 50℃: 2 minutes / 100℃ (temperature rise: 5℃ / minute); 12 minutes / 150℃) ; (temperature rise: 20°C / min); 150°C: 16 minutes; (temperature rise: 50°C / min); 250°C: 17 minutes) The formation of the chlorinated derivative was confirmed.

[0549] E...

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Abstract

The present invention relates to the use of metal accumulating plants for the preparation of catalysts useful in chemical reactions.

Description

technical field [0001] The present invention relates to the use of metal accumulating plants for carrying out chemical reactions. Background technique [0002] Biodecontamination of soils contaminated with radioisotopes, agricultural and industrial organic wastes and discharges, metalloids or metals is of great concern because soils play a fundamental role in greatly determining food production and water quality. [0003] Among the different polluting substances, heavy metals are among the most harmful compounds because they are not biodegradable and accumulate in soil. The extent of the problem is fully illustrated by the example near the mines of Saint-Laurent-le-Gard. Mining of the seam near Ganges from Roman times until 1992 (Rolley J.P., lapetite histoire du plombet du zincen Cévennes (A small history of lead and zinc in the Cevennes), www.ensm-ales.fr / ~jprolley / Geologie / Pb-Zn. html, 2002) has caused the soil to be significantly polluted by zinc, lead, and cadmium (EM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J23/06B01J23/755B01J23/72C02F3/32B09C1/10C07C31/34
CPCA62D3/35B01J23/06B01J23/72B01J23/755C07C17/16C07C67/03C07C67/347C07D239/22A62D2101/04C07C69/24C07C69/608C07C19/01C07C23/10C07C29/62C07C31/36C07C2/861C07C41/30C07C45/00C07C67/02C07C209/32C07C2523/04C07C2527/122C07C2527/128C07C2527/138C07F1/08
Inventor C·格里森J·艾斯卡雷
Owner CENT NAT DE LA RECHERCHE SCI
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