Brine production of ultrafine magnesium hydroxide: an economical and effective industrial approach

The brine method for producing ultrafine magnesium hydroxide has become an important way to achieve high-value utilization of magnesium resources due to its advantages of abundant raw materials and low cost. This article will introduce in detail the process flow and technical points of preparing ultrafine magnesium hydroxide by the brine method.

Overview of the process flow

Raw material preparation

Use magnesium-containing resources such as seawater desalination byproducts or salt lake brine.

Magnesium ion enrichment

If necessary, increase the magnesium ion concentration by evaporation or ion exchange.

Reaction condition control

Select suitable alkaline substances, control the reaction temperature, pH value and stirring speed.

Precipitation and filtration

Form magnesium hydroxide precipitate, and remove impurities by filtration.

Surface modification

Use surfactants or coupling agents to improve the dispersibility and compatibility of magnesium hydroxide.

Drying and crushing

Use spray drying, freeze drying and other methods, followed by mechanical crushing.

Post-processing

Screening and grading to ensure that the product meets different application requirements.

Technical points

Reaction condition optimization: finely control pH value, temperature, stirring speed, and affect product characteristics.

Surface modification technology: Improve the flame retardant and processing properties of the product.

Equipment selection: Efficient stirring and filtering equipment is essential to improve production efficiency.

Application areas

Ultrafine magnesium hydroxide is widely used in flame retardant materials, plastic and rubber fillers, coatings, papermaking, medicine and other industries.

Advantage analysis

Low raw material cost: Brine resources are easy to obtain, reducing production costs.

Simple production process: Suitable for large-scale industrial production.

Wide range of product applications: The versatility of ultrafine magnesium hydroxide makes it of great value in many industries.

Challenges and solutions

Particle size and morphology control: By finely controlling the reaction conditions, specific application requirements can be met.

The preparation of ultrafine magnesium hydroxide by brine method, with its economical and efficient characteristics, provides a new idea for the sustainable utilization of magnesium resources. In the future, through continuous technological innovation and process optimization, it is expected to further improve product quality and expand the application field.