What are the main production processes of acetic acid?

Currently there are three main types: ① Ethanol-acetaldehyde-acetic acid (ethanol oxidation method) ； ② Ethylene-acetaldehyde-acetic acid (ethylene oxidation method) ； ③ Low pressure methanol oxo synthesis method. In most cases, low-pressure methanol oxo is the preferred process route for acetic acid production, currently accounting for 65% of global acetic acid production capacity. All world-scale acetic acid plants use the methanol oxo process. The low-pressure methanol carbonylation method has two catalytic systems: rhodium series and iridium series. The low-pressure carbonyl method of methanol to synthesize acetic acid was first industrialized by the American Monsanto Company. This method uses rhodium-iodine (HI, MEI) as the catalyst system. . In 1980, the American company Celeance successfully developed the AO Plus (acid optimization) process based on the traditional Monsanto method. The British BP Company continued to improve the Monsanto/BP process and launched the BP Cafiva process in 1996.

Methanol oxo synthesis process methanol + carbon monoxide generates acetic acid

As far as I know, there are currently three main types: 1. Ethanol-acetaldehyde-acetic acid (ethanol oxidation method) ； 2. Ethylene-acetaldehyde-acetic acid (ethylene oxidation method) ； 3. Low-pressure methanol oxo synthesis method. I have been engaged in the production of the first method, and this process is also basically used for edible acetic acid.

Nowadays, large domestic factories with high output use the process of low-pressure carbonylation of methanol to acetic acid. The more advanced one is BP's iridium-based catalyst system. Coal chemical companies all use the process of coal gasification - synthesis of methanol + carbon monoxide - acetic acid

study* Got it! ! ! ! ! ! ! !

Our company is the most evil one. We do the opposite and use methyl acetate to make acetic acid, with an annual output of 40,000 tons.