Search results for "hydroxide"
showing 10 items of 317 documents
A novel colorimetric experimental technique for the characterisation of metal hydroxides reactive crystallization phenomena
2021
The reactive crystallization of metal hydroxides constitutes a field of raising interest driven by the importance of metals recovery and the wide industrial applications of their hydroxides. A popular example is related to the case of magnesium hydroxide (Mg(OH)2), which is widely employed in the fields of water treatment, desulphurization of fuel gases, pharmaceutical industry, refractory field and flame retardants
CFD-PBM simulation of Mg(OH)2 precipitation from saltwork brine
2021
Recovery of magnesium hydroxide from real bitterns
Operational analysis of a novel reactive crystallizer for the production of Magnesium Hydroxide from waste brines
SELECTIVE CRYSTALLISATION OF MAGNESIUM AND CALCIUM HYDROXIDES FROM INDUSTRIAL WASTE BRINES: A PILOT STUDY
2021
In the last years, a rising interest has been focused on the valorization of waste brines from industrial processes, such as desalination plants. In most current scenarios, waste brines are disposed directly, or after being treated, into a receiving water bodies, often causing environmental concerns and, more importantly, renouncing to the possibility of using such a waste as source of valuable raw materials. In fact, these brines are typically rich in useful salts and minerals, whose recovery can increase the environmental and economical sustainability of the industrial process [1-2]. The ZERO BRINE EU-H2020 project aims at the development of technologies for the recovery of salts, mineral…
Design of a novel membrane-integrated waste acid recovery process from pickling solution
2019
Abstract Hydrochloric acid pickling is a common practice in steel manufacturing industry. During the process, acid is consumed to dissolve surface oxides and metals ions are accumulated in the solution, which becomes less effective with time. In addition, the costly and risky waste acid disposal is another issue affecting the hot-dip galvanizing industry. In this work, a novel sustainable waste acid recovery process from pickling solutions based on circular approach is proposed to tackle these issues. The innovative system allows (i) the continuous regeneration of pickling solutions to enhance process rate and performance and (ii) minimise the highly expensive and environmentally risky wast…
Development of a pilot plant for the recovery of magnesium hydroxide from waste brines
Waste brines from various industrial processes, mainly from saltworks, are an important source of minerals, such as magnesium, table salt and potable water.
Magnesium Hydroxide Nanoparticles Production from Natural Bitterns
2022
Magnesium hydroxide nanoparticles are widely employed in numerous industrial applications. Several preparation methods have been proposed using mainly synthetic Mg2+ containing solutions. In the present work, the possibility of producing Mg(OH)2 nanoparticles from real bitterns, the by-product of sea salt production, is investigated. Bitterns are highly concentrated Mg2+ containing solutions whose exploitation can turn a waste into valuable products embracing the circular economy idea. Two bitterns collected from Galia and Margi saltworks of the district of Trapani (Italy) were studied. Galia and Margi bitterns had a 1 M and 2.5 M Mg2+ concentration, respectively. A 2 mm diameter circular-c…
Synthesis and characterization of magnesium compounds recovered from exhausted brines.
2023
Gezielte und reversible Fluoreszenzmarkierung von SH-Lysozym mit Vinylsulfonen
1985
Am Beispiel von SH-Lysozym wird gezeigt, wie man SH-Gruppen reversibel mit den Vinylsulfonen 1–4 nach Gl. (a) selektiv blockieren und nach Gl. (b) selektiv deblockieren kann. Das wasserlosliche Vinylsulfon 2 macht das blockierte SH-Lysozym wasserloslich. Durch Einwirkung von NaOH-Losung wird nach Gl. (b) das wasserunlosliche SH-Lysozym regeneriert. Die fluoreszierenden Vinylsulfone 3 und 4 konnen als Fluoreszenzmarker nach verschiedenen Arbeitsweisen zum qualitativen Nachweis und zur quantitativen Bestimmung von SH-Gruppen herangezogen werden. Selective and Reversible Fluorescence Marking of SH-Lysozyme with Vinyl Sulfones The SH groups of SH-lysozyme as a model substance are selectively bl…