Fluorosilicic Acid

Fluorosilicic acid

Appearance and properties: its concentrated solution is colorless and transparent fuming liquid with pungent smell.

Aqueous fluorosilicate crystal

Relative density (water =1) : 1.32g/mL

Boiling point (℃) : 108.5

Solubility: Soluble in water.

1. Product introduction

Fluorosilicic acid, also known as silfluorohydroic acid, is a gaseous acid, the chemical formula is H2SiF6, anhydrous fluorosilicic acid is colorless gas, unstable, easy to decompose into silicon tetrafluoride and hydrogen fluoride. Aqueous solution is colorless, a strong acid, corrosive, can attack glass. Store in wax or plastic containers. The concentrated solution fumed and colorless dihydrate (fluorosilicic acid dihydrate) crystals precipitated upon cooling. The melting point was 19℃. Fluorosilicic acid has disinfecting properties. It is used for making fluorosilicate and cryolite, electroplating, beer disinfection, wood anticorrosion and so on. By silicon dioxide dissolved in hydrofluoric acid or mixed with quartz powder, calcium fluoride and concentrated sulfuric acid after heating and made. It can also be absorbed by water from the silicon tetrafluoride gas escaping from the decomposition of phosphate rock in the phosphate fertilizer plant. Fluorosilicic acid solution contains hexafluorosilicate ion (SiF62−) with octahedral structure and Si-F bond length of 1.71 A.

2. Product Parameters (Specifications)

3. Product features and uses

1, is the preparation of sodium fluorosilicate, potassium, ammonium, magnesium, copper, barium, lead and other fluorosilicate and silicon tetrafluoride basic raw materials. Used for metal electroplating, wood anticorrosion, beer disinfection, brewing industry equipment disinfection (1%-2%H2SIF6) and lead electrolytic refining, etc. Also used as mordant and metal surface treatment agent.

2, used for the determination of barium. Separate barium and strontium. Electrolytic refining of lead and tin. Preparation of fluorosilicate. Equipment disinfection.

3, fluorosilicic acid is also used in some electroplating additives, fluorosilicic acid or salt for chromium plating, can have a similar effect with sulfate root, and can improve the current efficiency to about 20%, brightness, bright current density range widened; Fluorosilicic acid has activation effect on chromium plating layer, short power off time, continue to plating, bonding force is almost not affected, so fluorosilicic acid is necessary to add components in rolling chromium plating; Fluorosilicic acid can reduce the current density of chromium plating, improve the coating ability, but increase the corrosion of bath.

4. Raw materials for making fluorosilicate and silicon tetrafluoride are also used in metal electroplating, wood anticorrosion, beer disinfection, etc.

5. Fluoride of tap water

In order to prevent caries, fluoride concentration in community water supply should be adjusted to an appropriate concentration in low fluoride area, which means fluoride in tap water. In the implementation process, the water plant should have a strict management and detection system, to ensure that the concentration of fluoride in drinking water reaches and maintains in the predetermined standard range, adding fluoride such as H2SiF6, Na2SiF6 and NaF. If it's fluosilicate and sodium fluoride, add with liquid, if it's sodium fluosilicate, add with solid. According to the fluoride level of local raw water, climate and water supply, water samples were taken every day for routine monitoring and recording.

4. Product details

Fluorosilicic acid is a coordination acid with strong acidity and PH of 1.6 at 0.03mol/L concentration (not considering decomposition, acidity is similar to nitric acid). If stored in a plastic container, it is stable in dilute solution at room temperature. The complex ion fluorosilicic acid (SiF62-) is very stable. Fluosilicic acid can release hydrogen ions well, and its salts have special solubility, potassium salt and barium salt are insoluble, rubidium salt is slightly soluble, sodium salt, lithium salt and ammonium salt are soluble, cesium salt, ferric salt is easily soluble. [1] Decomposition by heat releases toxic fluoride gas. It is highly corrosive.

5. Delivery, transportation and services

Operation precautions: airtight operation, pay attention to ventilation. The operation is mechanized and automated as far as possible. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter gas mask (full cover), rubber acid and alkali resistant suit and rubber acid and alkali resistant gloves. Keep away from flammable and combustible materials. Prevent steam leakage into the workplace air. Avoid contact with alkali. Handling should be carried lightly to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may contain hazardous materials.

Storage precautions: Store in a cool and ventilated warehouse. Keep away from fire and heat source. The storage temperature should not exceed 30℃. Keep container sealed. It should be stored separately with combustible materials and alkali, and must not be mixed. The storage area shall be equipped with leakage emergency treatment equipment and suitable storage materials.

6.FAQ

1.How many production lines in your factory?

Our company has two production lines.

2. How long is your delivery time?

Around 7 days to 15 days