Data from the industrial recovery process are limited in open sources. Ecochem Inc., a Du Pont–Conagra partnership, had developed a recovery and purification process that produced a by-product ammonium salt instead of insoluble gypsum cake, and the company intended to sell this as a low-cost fertilizer (Datta and Henry 2006).

At present, the idea of the common treatment process of zero-emission of industrial high-salt wastewater is to make the salt and water separate and recover the …

Finally, the EOs were dried with anhydrous sodium sulfate and weighed, and then stored in a refrigerator at 4 °C. 2.3 In Situ Formation of DES. The extraction process is represented in Fig. 1. 0.5 mL EOs was diluted with 2 mL n-hexane in 15 mL centrifuge tube. Certain amount of quaternary ammonium salt was added to the tube, …

During the operation of salt separation of high-brine from a mine using the nanofiltration separation process, the purity of sodium sulfate reached more than …

Huahong Shi & Tiancun Xiao. 4118 Accesses. 1 Citation. Explore all metrics. Abstract. Sulfur recovery is an important industrial process for fossil fuel clean …

The aim of this study was to focus on the leaching and separation of cobalt from other impurity metals in spent LIBs to recover pure cobalt sulfate for pigment use. 2. Materials and methods2.1. MaterialsThe spent LIBs were subjected to physical treatment which involved discharging, dehydration, drying and crushing steps (Shin et al., 2008).

Ideally, the total percent recovery will be close to . The efficiency of separation and recovery steps will vary, and losses of the individual components can occur and result in less than recovery. Sample calculations are provided in the following example. Problem 5. A KBr-AgCl-NiCO. 3 mixture weighs 3.27 g. After separating the individual

Resource recovery from such unutilized by-products presents a sustainable waste management approach. This work presents the development and evaluation of a process for sodium-sulphate (Na 2 SO 4) recovery from sulphate-rich bitterns using an integrated process combining cooling crystallization, filtration, and drying as major unit …

(1) Quantitative extraction of 99.99% pure cobalt sulfate can be obtained from LIBs industry waste using Cyanex 272 as an extractant by solvent extraction process from the leach liquor, by managing different process parameter such as pH of the leach liquor, Cyanex 272 concentration, O/A volume 368 B. Swain et al. / Separation and Purification ...

However, some operations have inherent problems such as slow kinetics, solid–liquid separation, high cost, and low purity (Swain et al., 2004). Solvent extraction has been widely used for the recovery and separation of metals from leach liquors, effluents, and waste materials.

Overarching principles for salting-out extraction are long-established but poorly disseminated. We highlight the opportunity for more widespread application of this technique using the Hofmeister series as a foundational basis for choosing the right salt. The power of this approach is exemplified by the aqueous workup of a highly water …

1. Introduction. The mining and metallurgical industries produce large amounts of waste during the processing and neutralization of acidic streams [].Sulfuric acid is commonly used for leaching metals and their oxides [2,3] and sodium hydroxide is subsequently used for their precipitation and acid neutralization, as well as for pH control …

The pulp obtained from sulfite process is comparatively brighter than the pulp obtained from soda or sulfate process. Unbleached pulp of 32.3 kappa number at 50.3% yield was obtained in a study carried out on cornstalk using 16% of sodium sulfite and sodium hydroxide in 50:50 ratio at 145°C for 30 minutes.

2.1. Materials. We used self-made simulated sodium sulfate waste salt (0.3 mol·L −1) containing lithium carbonate; its components are shown in Table 1 [].H 2 SO 4, NaOH, NaCO 3, and other chemicals used in this study were all analytically pure (Meifeng Chemical Instrument Co. Ltd., Hefei, China).The anion exchange, cation exchange, and …

Results indicate that mixing the lithium sulfate and sodium carbonate solutions both at 2.0 mol/L concentration at 45 °C and 300 rpm agitation rate followed by cooling crystallization of sodium sulfate byproduct produces lithium carbonate with 90% lithium recovery and 99.0% purity.

Hydrometallurgical recovery of rare earth elements (REE) from NiMH battery waste can be performed using sulfuric acid leaching followed by selective precipitation as double salt (REENa(SO4)2·H2O) …

Finely ground Na 2 SO 4 seed crystals are introduced to an aqueous solution which is concentrated at a temperature greater than 60° C. to produce a first fraction consisting of ammonium sulfate with a minor amount of sodium sulfate, and a second fraction …

de Araujo Sampaio, D. et al. Aqueous two-phase (polyethylene glycol+ sodium sulfate) system for caffeine extraction: Equilibrium diagrams and partitioning study. J. Chem. Thermodyn. 98, 86–94 ...

Process for the recovery and for the separation of pure sodium sulfate and pure ammonium sulfate from aqueous solutions thereof Download PDF Info Publication number US3607141A.

An acid-base extraction can be used to extract carboxylic acids from the organic layer into the aqueous layer. As was discussed in the previous section, NaOH can be used to convert a carboxylic acid into its more water-soluble ionic carboxylate form. However, if the mixture contains a desired compound that can react with NaOH, a milder base ...

alkaline or reducing recovery solution such as a m ixture of sodium hydrate and sodium sulfate. The I 2 crossed the membrane from the aqueous feed solution into the recovery solution, where it was ...

The most commonly used polyacrylamide gel electrophoresis for quantitative protein analysis is Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). ... (%C). Deferring these two parameters, helps in regulation in the pore size of the gel to yield the best separation result. %T indicates the pore size of the prepared gel ...

Semantic Scholar extracted view of "Sustainable and efficient recovery of lithium from sodium sulfate by-product of lithium hydroxide production process using solvent extraction" by Licheng Zhang et al. ... An innovative scheme for the separation of potassium from lithium-bearing solution: A jarosite precipitation method ...

Finely ground Na 2 SO 4 seed crystals are introduced to an aqueous solution which is concentrated at a temperature greater than 60° C. to produce a first fraction consisting of ammonium sulfate with a minor amount of sodium sulfate, and a second fraction consisting of a predominant amount of sodium sulfate with a minor amount of …

The paper contains a new hydrometallurgical process flow sheet for the recovery of high pure cobalt sulfate solution/salt from waste LiCoO2 cathodic active material generated from lithium ion ...

SRB process is more efficient for low concentrated sulphate removal and metal recovery, this process is high predictable, highly controllable.

The Electrosynthesis Company and Ormiston Mining and Smelting Co. developed a process to split sodium sulfate, improving the current efficiency by …

What is claimed is: 1. A process for producing potassium sulfate or potassium sulfate and sodium sulfate from potash and a sodium sulfate/water source, comprising the steps of: (a) subjecting a sodium sulfate source to conversion with potash in an aqueous medium to yield glaserite precipitate and a first mother liquor;

Abstract. Osmotic membrane distillation-crystallization is proposed in this study to recover sodium carbonate, potassium nitrate and sodium sulphate from …

On the other hand, Table 2 shows the consumptions and costs of power, chemicals and water in the recovery process, where 3340 kg of H2O2, 600 kg of sodium sulfate, 100 kg of extractant and 3000 kg of water are needed. In addition, the electricity for the entire Na2SO4 electrolysis and recycling process is calculated as 16535 kW·h.