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Process for preparing phosphine-selective transition metal-bound particles

A transition metal and selective technology, which is applied in chemical instruments and methods, compounds of group 5/15 elements of the periodic table, radioactive pollutants, etc., can solve problems such as high pressure drop and uncontrollable load

Active Publication Date: 2017-10-27
ITALMATCH KEMIKALS SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the loading is less controllable, and due to particle size and shape issues, this polymer is not suitable for industrial processes, e.g. filtration at high flow rates, forming a dense filter cake, resulting in high pressure drop

Method used

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  • Process for preparing phosphine-selective transition metal-bound particles
  • Process for preparing phosphine-selective transition metal-bound particles
  • Process for preparing phosphine-selective transition metal-bound particles

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preparation example Construction

[0167] The method for preparing phosphine-based transition metal binding particles according to the present invention comprises at least a first step: the above-mentioned phosphine-modified macroporous particles and at least one of the above-mentioned NHR a R b Types of nucleophiles react. According to a Mannich-type condensation reaction (Tetrahedron, 46, 1791, 1990), the OH groups of the phosphine units grafted on the macroporous particles react with amines.

[0168] As mentioned above, the nucleophilic reactant NHR used within the scope of the present invention a R b , contain at least one "NH" functional group, especially may contain two "NH" functional groups.

[0169] Preferably, the phosphine-modified macroporous particles and the nucleophilic reactant NHR a R b The reaction between them is carried out with at least one molar equivalent of "NH" functionality (relative to the free hydroxyl end groups of the phosphine-modified macroporous particles).

[0170] The me...

Embodiment 1

[0223] Synthesis of particles of the invention

Embodiment 11

[0225] Phosphine modified macroporous particles

[0226] Resins containing secondary and primary amines (containing ethylenediamine-functionalized polystyrene-based particles, resin 1, 1700 ml) were neutralized with THP (2.03 mol) by neutralizing THPS (1.02 mol) with NaOH (2.03 mol). preparation) contacts. After 90 minutes, the resin was filtered off and washed with water to give resin 2. After the reaction, ICP analysis of the residual phosphorus content showed consumption of 1.60 mol THP, corresponding to 0.94 mmol P / ml resin pellets.

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Abstract

The present invention relates to a process for the preparation of phosphine-selective transition metal-binding particles comprising at least one of the steps of: reacting a macroporous particle comprising at least one "NH" reactive functional group with a nucleophilic reactant of formula NHRaRb, said The "NH" reactive functional group is capable of reacting with at least one molar equivalent of the phosphine derivative R-P(CH2OH)2, wherein NHRaRb contains at least one "NH" functional group.

Description

technical field [0001] The present invention relates to phosphine-based transition metal binding particles, a process for the preparation of these particles and their use for binding transition metal atoms in aqueous media. [0002] More specifically, the present invention relates to novel methods of preparing phosphine-based transition metal-bound particles such that the selectivity of those particles for a particular subset of transition metals can be more easily and finely tuned. Background technique [0003] Metal-binding particles are increasingly being used to remove metals from metal-containing waste streams. The aim is to purify sewage, recycle the water, and recover (valuable) metals. Thus, this purpose may have ecological, economic, or both implications. [0004] Metal-binding particles can be added to metal-containing liquid streams as flocculants or coagulants. Alternatively, water can be filtered by passing it through a column of metal-binding particles. Par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/50C02F1/58
CPCC02F1/285C02F1/58C02F1/683C02F2101/006C02F2101/20C08J2325/06Y02P10/20C07F9/505C02F1/62C08J9/36
Inventor 史蒂文·凡 祖特芬维拉蒂卡·博科克
Owner ITALMATCH KEMIKALS SPA