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Integrated extraction-adsorption process for selective ...

This work aimed at proposing a green process for selective recovery of antioxidant polyphenols, in order to propose a sustainable valorisation of chicory grounds, a food-industry by-product. An integrated extraction-adsorption process was performed, enabling simultaneous extraction of phenolics and their purification in a single operation.

US5846501A - Process for the selective recovery of the ...

In order to recover in an environmentally sound and economic manner used hardening shop salts which contain nitrate-nitrite, the salts, comminuted to particle sizes of from 1 to 50 mm, are dissolved in a mixture of nitric acid and hydrogen peroxide without nitrogen oxides arising, and, by evaporation and cooling, potassium nitrate, sodium chloride, and sodium nitrate are obtained sequentially ...

Recovery/Recycling Methods for Metal Finishers | Products ...

Sep 29, 2011· Recover the process solution and directly add back into the process tank. Remove contaminants from process solutions to greatly extend solution life. Recover metals that can be reused or sent back to suppliers and/or reclaimers. Evaporation is the most common, simplest and, in most cases, cost-effective form of recovery. Evaporation can provide ...

Selective metal recovery from Fe-rich industrial residues ...

Mar 04, 2019· Therefore, by developing a process to recover the economically important metals, we could reduce the amount of waste and also turn this waste stream into a valuable product. New process to recover selectively recover lead and zinc from jarosite. Selectivity is a major challenge in extractive metallurgy of industrial process residues.

PROCESS FOR SELECTIVE ADSORPTION AND RECOVERY OF …

May 03, 2019· This invention relates generally to a process for selective adsorption and recovery of lithium from natural and synthetic brines, and more particular to a process for recovering lithium from a natural or synthetic brine solution by passing the brine solution through a lithium selective adsorbent in a continuous countercurrent adsorption and desorption circuit.

Microbial enhanced oil recovery - Wikipedia

Microbial enhanced oil recovery (MEOR) is a biological based technology consisting in manipulating function or structure, or both, of microbial environments existing in oil reservoirs. The ultimate aim of MEOR is to improve the recovery of oil entrapped in porous media while increasing economic profits.

US6264904B1 - Process for recovery of cobalt by selective ...

There is provided a process for the recovery of cobalt as cobalt (III) hexammine sulphate, comprising adding an effective amount of a calcium sulphate slurry to an ammoniacal ammonium sulphate solution containing cobalt (III) hexammine sulphate to thereby selectively precipitate a cobalt (III) hexammine sulphate-calcium sulphate double salt.

Recovered-memory therapy - Wikipedia

Recovered-memory therapy (RMT) is a catch-all psychotherapy term for therapy using one or more method or technique for the purpose of recalling memories. It does not refer to a specific, recognized treatment method, but rather several controversial and/or unproven interviewing techniques, such as hypnosis and guided imagery, and the use of sedative-hypnotic drugs, which are presently rarely ...

US Patent for Enhanced process for selective salt recovery ...

Enhanced process for selective salt recovery from wastewater, waste salts, and brines . Jul 26, 2017 - Veolia Water Technologies, Inc. A process for treating wastewater or waste brines that include sodium and chloride ions. The waste brine is concentrated and thereafter directed to a Mirabilite crystallizer that produces hydrated sulfate salt ...

Selective extraction - Circular Economy Guide

Selective extraction is a mechanical recycling method in which specific materials or substances are recovered from solutions containing multiple materials and contaminants. Since the purification is done at the molecular level, the process can recover a very pure material.

Selective Flotation - Mineral Processing & Metallurgy

Who would think that Selective Flotation of copper, gold, zinc or any metal would required that one must be able to feel pain and recognized and/or admit when it hurts. Flotation mass-pull is a process that is often misunderstood; a learner's mistake made by non-operating types. You do not need to pump anything in the lab. In selective flotation, less is more!

Selective Process Steps for the Recovery of Scandium from ...

We report the development of a process allowing the selective, sustainable recovery of scandium (Sc) with 75% efficiency from Jamaican bauxite residue (red mud), a waste product from aluminum production.

Development of recovering lithium from brines by selective ...

Development of recovering lithium from brines by selective-electrodialysis: Effect of coexisting cations on the migration of lithium. ... The aim of this study was to examine the influence of major coexisting cations in brines on lithium recovery in the selective-electrodialysis (S-ED) process. ... As a simple recovery process, a large sum of ...

Process for recovering tungsten carbide from cemented ...

Jan 24, 1995· A process of recovering tungsten carbide from cemented tungsten carbide scraps by selective electrolysis is disclosed. A chelating agent is added to the electrolyte for complexing with tungsten ion to prevent passivation of tungsten carbide, and thus the dissolution rate of the cementing agent is increased.

Environmentally benign process for selective recovery of ...

Herein, we find it is possible to eliminate secondary emission and no sodium is included in the process of spent LIB (LiCoO 2 as a case study) recycling if the transfer pathway of sulfur among different phases is well controlled. At the same time, high lithium recovery selectivity is achieved.

Selective leaching process for the recovery of copper and ...

The results indicated that zinc extraction efficiency was higher than 95%. A selective acid leaching process was then used to recover the copper content of the residue after filtration. In the second stage, an additional 1 N of sulphuric acid was added to the suspension in the selective leaching process, and the pH value was controlled at 1.5-2.0.

Method for bioleaching and solvent extraction with ...

May 07, 2019· A bioleaching and solvent extraction process with selective recovery of copper and zinc from sulphide polymetallic concentrates, according to claim 11, wherein the copper removal step comprises countercurrently contacting the copper loaded organic stream with a copper depleted electrolyte solution having an acidity of >150 g/l H 2 SO 4, wherein ...

Selective Process Steps for the Recovery of Scandium from ...

Request PDF | On Nov 21, 2017, Remya P.N. Narayanan and others published Selective Process Steps for the Recovery of Scandium from Jamaican Bauxite Residue (Red Mud) | Find, read and cite all …

WO2016086910A1 - Process for the selective flotation of ...

This process allows an industrial-scale treatment for the selective recovery of kainite from mineral mixtures with the aid of the flotation process. The invention relates to a process for the selective flotation of kainite from ground potash ores or, for example, from crystallized salt mixtures which are obtained by evaporation processes and ...

PROCESS FOR RECOVERING HEAVY MINERAL BY SELECTIVE ...

Aug 28, 1973· A process of recovering heavy minerals from a body of natural flowing water in which said minerals are entrained, comprising A. providing in said body of flowing water adjacent the bottom thereof a collecting structure which is capable of promoting a selective settling of said heavy minerals from said body of flowing water, B. artificially agitating the bottom of said body of water upstream of ...

(PDF) Recovery of iron from iron ore slimes by selective ...

A laboratory scale selective flocculation process capable of recovering iron oxide from a sample of ultrafine (less than 10 μm) iron ore tailings containing kaolinite as the main gangue mineral ...

Selective Data Backup, Restore, Data Recovery for iOS

Selective Backup, Restore, Data Recovery Tool for iOS, by david. ... Click on the Start button to initiate the recovery process. The tool will automatically detect your device and offer the latest available firmware for download. Click on the Download button to download the firmware. Once the firmware has been downloaded, it will automatically ...

Selective recovery of polyphenols from MDF process waters ...

A scalable, fixed-bed adsorption system for the removal and selective recovery of polyphenols (lignans and stilbenes) from medium-density fiberboard (MDF) process waters was developed.

Integrated process extraction–adsorption for selective ...

Dec 13, 2013· Optimization of adsorption and desorption for selective recovery of Aronia phenolics. • New integrated process for selective anthocyanins recovery from berries was proposed. • Simultaneous eco-extraction of phenolics and their purification in a simple process. • Process integration enhances the extraction yields of phenolics of more than ...

Selective recovery of gold from waste mobile phone PCBs by ...

Dec 30, 2011· Selective recovery of gold from waste mobile phone PCBs by hydrometallurgical process. ... In a two-stage leaching process the selective dissolution of copper and gold using electro-generated chlorine was achieved. In the 1st stage leaching the maximum copper recovery in 2 mol/L HCl solution was 97% in 165 min at 25 °C and 40 g/L pulp density ...

US5384016A - Process for recovering tungsten carbide from ...

A process of recovering tungsten carbide from cemented tungsten carbide scraps by selective electrolysis is disclosed. A chelating agent is added to the electrolyte for complexing with tungsten ion to prevent passivation of tungsten carbide, and thus the dissolution rate of the cementing agent is …

Selective Flocculation and Flotation

Selective flocculation and flotation were evaluated in a pilot plant with a feed rate of 900 lb/hr. Concentrates averaging 61. 7 pct iron and 5.1 pct silica were obtained, with an accompanying iron recovery of 67.2 pct. About 83 pct of the process water requirements were reclaimed from the slime and froth tailing and then recycled.

Separating and recovering lithium from brines using ...

The lithium recovery ratio (R Li) and the separation coefficient of each coexisting cation and lithium (F M–Li) are two significant parameters of S-ED process in separating and recovering lithium from brines with different feed characteristics. In the section 3.1, on the one hand, temperature has some positive influence on the lithium ...

Selective Process Steps for the Recovery of Scandium from ...

We report the development of a process allowing the selective, sustainable recovery of scandium (Sc) with 75% efficiency from Jamaican bauxite residue (red mud), a waste product from aluminum production. The process design is inspired by green chemistry principles and focuses on establishing highly selective process steps (sulfation, leaching, and precipitation) in order to minimize costs and ...

Hybrid process to recover helium | Linde Engineering

Hybrid process to recover helium ... The technical name for this process is the principle of selective permeation. Depending on the gas composition and the size of the plant, any number of cartridges can be combined in one or more membrane stages to optimise the yield.