摘要:
[Problem] To provide a magnesium hydroxide-based solid solution which has smaller primary particles and secondary particles and improved reactivity with an acid as compared with conventional magnesium hydroxide (Mg(OH) 2 ), improves the flame retardancy and mechanical strength of a resin, and also forms a non-sedimenting slurry, providing the same handleability as a liquid. [Structure] A magnesium hydroxide-based solid solution represented by the following formula (1) : Mg(OH) 2-x R x (Formula 1), wherein R represents a monovalent organic acid, and x represents 0
摘要:
[Problem] To provide a magnesium hydroxide-based solid solution which has smaller primary particles and secondary particles and improved reactivity with an acid as compared with conventional magnesium hydroxide (Mg(OH) 2 ), improves the flame retardancy and mechanical strength of a resin, and also forms a non-sedimenting slurry, providing the same handleability as a liquid. [Structure] A magnesium hydroxide-based solid solution represented by the following formula (1) : Mg(OH) 2-x R x (Formula 1), wherein R represents a monovalent organic acid, and x represents 0
摘要:
Method for producing dead burned magnesia and products obtainable thereby. The invention relates to magnesium oxides and methods for producing them. Provided is a method for producing a sintered, high density, dead burned magnesia (DBM) from an aqueous slurry of magnesium hydroxide or a mixed magnesium hydroxide / magnesium oxide slurry,characterized inthat Ti0 2 and graphite are added to the aqueous slurry each in amount of 0.05 to 0.5 percent, preferably 0.1 to 0.3 percent, by weight of the magnesium hydroxide. Also provided is a sintered, high density, dead burned magnesia having a MgO content of 97-99 wt%, a density of at least 3.50 g/cm 3 and a crystal size of at least 90 microns.
摘要:
A method of producing magnesium hydroxide having a long diameter (width) of not less than 0.5 µm and an aspect ratio of not less than 10, said method comprising the steps of: (A) adding an alkali to and coprecipitating it with a mixed aqueous solution of a water-soluble magnesium salt and a monovalent organic acid or a salt thereof, or (B) adding an alkali aqueous solution to and coprecipitating it with an aqueous solution of a water-soluble magnesium salt and adding a monovalent organic acid or a salt thereof to the resulting product; and (C) hydrothermally treating the obtained slurry at 100°C or higher.
摘要:
The invention relates to a method for precipitating pentavalent calcium arsenate from an acidic solution, in which arsenic is at least partially in trivalent form. The acidic solution is neutralised before being routed to an arsenic oxidation stage,and a poorly soluble calcium-arsenic compound is precipitated from the solution, in which all the arsenic is pentavalent.
摘要:
The invention relates to a method and a device for producing a metal hydroxide, especially magnesium hydroxide, from a salt solution. The metal is first precipitated from the salt solution and the suspension obtained in this way is then filtered. The aim of the invention is to provide a method and a device by which means a highly pure metal hydroxide, especially magnesium hydroxide, can be easily, economically and rapidly produced. To this end, the suspension is filtered by means of at least one filter (13 - 17) pertaining to a cross-flow filtration installation (13 - 17), and a permeate created by the filtering of the suspension is redirected to the cross-flow filtration installation (14 - 17).
摘要:
Magnesium hydroxide of high purity, having a fine particle size suitable for use in flame retardants and other high-end uses, is produced by utilizing flue gas desulfurization system process slurry as feedstock; according to the production process energy-intensive steps are absent as well as high-cost chemicals usage.
摘要:
Magnesium hydroxide of high purity, having a fine particle size suitable for use in flame retardants and other high-end uses, is produced by utilizing flue gas desulfurization system process slurry as feedstock; the production process is absent energy-intensive steps as well as high-cost chemical usage.