99.8min Glacial Acetic Acid Food Grade

Product Description:

Glacial Acetic Acid is a kind of colorless, transparent liquid, CAS number 64-19-7, formula CH3COOH.

Product Application: 

The raw materials used in this method are relatively cheap, but the process flow is long, corrosion is serious, and the acetic acid yield is not high, so it is limited to regional areas with cheap butane or liquefied petroleum gas supplies. For example, the American company Celance uses butane for oxidation, with a yield of 76% and a by-product of formic acid of 6%. For example, if light oil at a temperature of 30-100°C in a refinery is used as raw material, the oxidation temperature is 165-167°C, the pressure is 3.92-4.90MPa, and the amount of catalyst cobalt naphthenate is about 0.1/10,000 of the oil input. The mixed acid obtained by air liquid phase oxidation is separated through six towers to obtain acetic acid, with a yield of about 40% of light oil. For every 1 ton of acetic acid produced, the by-products are 0.1t propionic acid, 0.02t succinic acid, 0.12t formic acid, and 0.4t neutral acid. Approximately 2.4t light oil and 0.2kg catalyst are consumed. Industrial example of acetaldehyde oxidation to acetic acid: acetaldehyde and manganese acetate are added to the oxidation tower from the bottom of the tower, oxygen is introduced in stages, the reaction temperature is controlled at 70-75°C, the gas phase pressure at the top of the tower is maintained at 9.81×104Pa, and oxygen is introduced at the top of the tower Appropriate amount of nitrogen to prevent gas phase explosion. Continuous discharging. The freezing point of the crude acetic acid generated by the reaction should be between 8.5-9°C, and flows into the concentration and refining process. The tail gas is cooled at low temperature, the condensate is refluxed into the oxidation tower, and the gas is vented. The crude acetic acid continuously enters the concentration tower, and the temperature at the top of the tower is controlled at 95-103°C. The dilute acetic acid condensed by the condenser is recovered in the dilute acid recovery tower, and the non-condensable gas enters the low temperature and is condensed into dilute acetaldehyde for recovery and use. The crude acetic acid with low boiling point is removed and continuously added to the acetic acid evaporator. The temperature at the top of the tower is maintained at about 120°C. The distilled acetic acid is the finished product. The high boilers and catalyst at the bottom of the tower can be burned to remove organic matter and recover the catalyst. Acetic acid used as food sour agent shall comply with GB1903-80, the content shall be ≥98.0%, and the impurity index shall meet the requirements. Purification method of reagent acetic acid: Add potassium permanganate powder (1-2% of the weight of acetic acid) to industrial-grade acetic acid, stir thoroughly to dissolve. The added amount should keep potassium permanganate from fading within 1 hour. Finally, divide the lower insoluble part. The acetic acid is evaporated in the distillation tower, and an appropriate amount of powdered chromic anhydride is added to the newly evaporated acetic acid. Dissolve it and collect the supernatant liquid for distillation. The middle fraction is the finished product. In addition to using acetic anhydride, dehydration methods can also use azeotropic mixtures composed of ethyl acetate, butyl acetate, benzene, diisopropyl ether, etc. and water to perform azeotropic distillation dehydration.

1. It is an important raw material for synthesized fiber, gooey, medicines, pesticides and dyes, and also a good organic solvent.In soap making used as saponification and bleaching agent.
2. It is widely applied in such industries as of plastics, rubbers and printing etc.
3. It widely used in Solvents, dyes, celluloseacetate, pharmaceuticals, in-socticides, textile printing, photographic film and coagulating rubber latec.

Store in a dry area. Ventilation at floor level. Keep out of direct sunlight. Fireproof store room. Keep locked up. Protect against frost. Provide for a tub to collect spills. Provide the tank with earthing. Detached building. Store only in a limited quantity. Meet the legal requirements.

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