Acetic acid, also known as acetic acid, is a chemical organic compound CH3COOH, which is an organic monobasic acid and the main component of vinegar. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic liquid with a freezing point of 16.6 ℃ (62 ℉). After the colorless crystal is solidified, its aqueous solution is weak in acidity, strong in corrosivity, strong in corrosivity to metals, and steam stimulates eyes and nose.

1、 Six functions and uses of acetic acid
1. The largest single use of acetic acid is to produce vinyl acetate monomer, followed by acetic anhydride and ester.
2. It is used to prepare acetic anhydride, vinyl acetate, acetate, metal acetate, chloroacetic acid, cellulose acetate, etc.
3. It is also an important raw material for pharmaceuticals, dyes, pesticides and organic synthesis, used to synthesize vinyl acetate, cellulose acetate, acetate, metal acetate and haloacetic acid;
4. Used as analytical reagent, solvent and leaching agent;
5. It is used to produce ethyl acetate, edible flavor, wine flavor, etc;
6. Dyeing solution catalyst and auxiliary materials
2、 Introduction to upstream and downstream of acetic acid industry chain
The acetic acid industry chain consists of three parts: upstream materials, midstream manufacturing and downstream applications. The upstream materials are mainly methanol, carbon monoxide and ethylene. Methanol and carbon monoxide are separated from syngas produced by the reaction of water and anthracite, and ethylene is derived from the thermal cracking of naphtha extracted from petroleum; Acetic acid is an important organic chemical raw material, which can derive hundreds of downstream products, such as acetate, vinyl acetate, cellulose acetate, acetic anhydride, terephthalic acid (PTA), chloroacetic acid and metal acetate, and is widely used in textile, light industry, chemical, pharmaceutical, food and other fields.

3、 List of enterprises with large output of acetic acid in China
1. Jiangsu Sop
2. Celanese
3. Yankuang Lunan
4. Shanghai Huayi
5. Hualu Hengsheng
There are more acetic acid producers with smaller output on the market, with a total market share of nearly 50%.