Magnesium-hydroxide/magnesium-sulfate/nifedipine

doi:10.1007/s40278-021-89628-1

Study on Process and Mecahnism for Preparation of Magnesium Hydroxide Whiskers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.92.247 ◽

2010 ◽

Vol 92 ◽

pp. 247-254 ◽

Cited By ~ 1

Author(s):

Yu Zhi Jiang ◽

Yue Xin Han ◽

Wan Zhong Yin ◽

Yan Bo Li

Keyword(s):

Magnesium Sulfate ◽

Magnesium Hydroxide ◽

Smooth Surface ◽

Raw Materials ◽

Slenderness Ratio ◽

Small Diameter ◽

Thermal Synthesis ◽

Initial Concentration ◽

Synthesis Conditions ◽

Anion Coordination

Taking alkaline magnesium sulfate whiskers and sodium hydroxide as raw materials, the proper process parameters were experimentally investigated for magnesium hydroxide whiskers preparation by hydro-thermal synthesis. The experimental results show that satisfactory product of magnesium hydroxide whiskers can be obtained under the proper synthesis conditions. The whiskers are characterized with smooth surface, straight morphology, and small diameter. The whisker product of magnesium hydroxide is of less than 0.5μm in diameter, around 100 in slenderness ratio, and 99.69% in purity under the condition of 4.0% initial concentration of alkaline magnesium sulfate whisker, stirring intensity of 100rpm, reaction temperature at 180°C, and reaction time of 4h. The synthetic mechanism of the whiskers was analyzed by the theories of anion coordination polyhedron nucleation and screw dislocation growth of the crystal.

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Synthesis of magnesium hydroxide and its calcinates by a precipitation method with the use of magnesium sulfate and poly(ethylene glycols)

Powder Technology ◽

10.1016/j.powtec.2012.10.008 ◽

2013 ◽

Vol 235 ◽

pp. 148-157 ◽

Cited By ~ 38

Author(s):

Agnieszka Pilarska ◽

Marcin Wysokowski ◽

Ewa Markiewicz ◽

Teofil Jesionowski

Keyword(s):

Magnesium Sulfate ◽

Magnesium Hydroxide ◽

Precipitation Method ◽

Ethylene Glycols ◽

Poly Ethylene

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Use of MgO to Promote the Oxyethylation Reaction of Lauryl Alcohol

Polish Journal of Chemical Technology ◽

10.2478/pjct-2014-0027 ◽

2014 ◽

Vol 16 (2) ◽

pp. 36-42 ◽

Cited By ~ 4

Author(s):

Agnieszka Pilarska ◽

Marek Lukosek ◽

Katarzyna Siwińska-Stefańska ◽

Krzysztof Pilarski ◽

Teofil Jesionowski

Keyword(s):

Thermal Decomposition ◽

Particle Size ◽

Magnesium Sulfate ◽

Sodium Hydroxide ◽

Bulk Density ◽

Surface Area ◽

Magnesium Oxide ◽

Magnesium Hydroxide ◽

Lauryl Alcohol ◽

Precipitation Method

Abstract Synthesis of magnesium hydroxide was performed by the precipitation method with the use of magnesium sulfate and sodium hydroxide. The infiuence of temperature and ratio of reagents was studied. Magnesium hydroxides, and the magnesium oxides obtained from them by thermal decomposition, were analyzed to determine their bulk density, polydispersity and particle size. The magnesium oxide with the largest surface area was tested as a catalyst in the oxyethylation of lauryl alcohol, and shown to be selective but poorly reactive in comparison with commercially available catalysts. Further studies are needed to improve its reactivity.

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A Prospective Randomized Trial of Magnesium Sulfate in Severe Preeclampsia: Use of Diuresis as a Clinical Parameter to Determine the Duration of Postpartum Therapy

Yearbook of Obstetrics Gynecology and Women s Health ◽

10.1016/s1090-798x(08)70345-x ◽

2006 ◽

Vol 2006 ◽

pp. 76

Author(s):

S. Thung

Keyword(s):

Randomized Trial ◽

Magnesium Sulfate ◽

Clinical Parameter ◽

Severe Preeclampsia ◽

Prospective Randomized Trial

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Environmental benefits of magnesium hydroxide-based peroxide bleaching of mechanical pulp – mill results

TAPPI Journal ◽

10.32964/tj12.6.9 ◽

2013 ◽

Vol 12 (6) ◽

pp. 9-15 ◽

Cited By ~ 1

Author(s):

TOMI HIETANEN ◽

JUHA TAMPER ◽

KAJ BACKFOLK

Keyword(s):

Sodium Hydroxide ◽

Magnesium Hydroxide ◽

Oxygen Demand ◽

Pulp Mill ◽

Transition Metal Ions ◽

Environmental Benefits ◽

Raw Material ◽

Paper Machine ◽

High Brightness ◽

Peroxide Bleaching

The use of a new, technical, high-purity magnesium hydroxide-based peroxide bleaching additive was evaluated in full mill-scale trial runs on two target brightness levels. Trial runs were conducted at a Finnish paper mill using Norwegian spruce (Picea abies) as the raw material in a conventional pressurized groundwood process, which includes a high-consistency peroxide bleaching stage. On high brightness grades, the use of sodium-based additives cause high environmental load from the peroxide bleaching stage. One proposed solution to this is to replace all or part of the sodium hydroxide with a weaker alkali, such as magnesium hydroxide. The replacement of traditional bleaching additives was carried out stepwise, ranging from 0% to 100%. Sodium silicate was dosed in proportion to sodium hydroxide, but with a minimum dose of 0.5% by weight on dry pulp. The environmental effluent load from bleaching of both low and high brightness pulps was significantly reduced. We observed a 35% to 48% reduction in total organic carbon (TOC), 37% to 40% reduction in chemical oxygen demand (COD), and 34% to 60% reduction in biological oxygen demand (BOD7) in the bleaching effluent. At the same time, the target brightness was attained with all replacement ratios. No interference from transition metal ions in the process was observed. The paper quality and paper machine runnability remained good during the trial. These benefits, in addition to the possibility of increasing production capacity, encourage the implementation of the magnesium hydroxide-based bleaching concept.

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