85 Phosphoric Acid

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Phosphoric acid

85 phosphoric acid Introduction:

Appearance and properties: colorless transparent or slightly light-colored thick liquid, pure phosphoric acid is colorless crystal, odorless, with sour taste.

Melting point (℃) : 42.35(pure)

Boiling point (℃) : 261

The relative density is 1.70

Relative density (water =1) : 1.87(pure)

Relative vapor density (air =1) : 3.38

Saturated vapor pressure (kPa) : 0.67(25℃, pure)

Solubility: miscible with water, can be miscible in ethanol.

85 phosphoric acid Production method:

The refined purification method dissolves industrial phosphoric acid in deionized water, purifies it to remove impurities such as arsenic and heavy metals, and then filters and concentrates it to produce high-purity industrial phosphoric acid products.

Wet process is produced by decomposing phosphate ore with acid. This method is divided into sulfuric acid method, hydrochloric acid method, nitric acid method, and ammonium bisulfate method. Commonly used is the sulfuric acid method. Due to different reaction temperatures and concentrations of phosphoric acid produced by the sulfuric acid method, there are three different forms of calcium sulfate crystals in phosphoric acid aqueous solution. According to their production processes, they can be divided into "dihydrate" process, "semi hydrate" process, and "anhydrous" process. In recent years, there have also been "semi hydrate dihydrate" process and "dihydrate semi hydrate" process

The production of phosphoric acid by thermal method includes acid cooling process, water cooling process, and spray defogging process

85 phosphoric acid use:

Used to manufacture zinc phosphate as an adhesive for dental filling;

Catalysts for the condensation of phenolic resins using plastics;

Drying agents for the production of dyes and intermediate chemical books;

Printing is used to prepare cleaning agents for wiping off stains on offset color printing plates.

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