What is the density of acetic acid?

Acetic acid, also known as acetic acid (36%-38%) and glacial acetic acid (98%), is an organic monobasic acid and the main component of vinegar, and its freezing point is 16.6℃.

Density is a measure of mass in a specific volume. Density is equal to the mass divided by the volume of an object, which can be expressed by the symbol ρ. In the international system of units and China's legal units of measurement, the unit of density is kilogram/meter.

manufacturing technique

BP Cativa process

BP Company is the world's largest supplier of acetic acid, and 70% of the world's acetic acid production adopts BP technology. BP Company applied for Cativa technology patent in 1996. Cativa process adopts a new catalyst system based on iridium and uses a variety of new additives.

Such as rhenium, ruthenium, osmium, etc. Compared with rhodium catalyst, iridium catalyst system has higher activity and fewer by-products, and can be operated under the condition of low water concentration (less than 5%), which can greatly improve the traditional methanol carbonylation process, reduce the production cost by as much as 30% and the expansion cost by 50%. In addition, due to the reduction of water concentration, the utilization efficiency of co is improved and the steam consumption is reduced.

Celanese Oplus Craft

Celanese is also one of the largest producers of acetic acid in the world. During the period of 1978, Hearst Celanese Company (now Celanese Company) was put into industrial production in Monsanto acetic acid plant in Lake Clare, Texas, USA. 1980, Celanese applied for the patent of AOPlus process, which greatly improved Monsanto process.

Adding high concentration inorganic iodine (mainly lithium iodide) in AOPlus process improves the stability of rhodium catalyst. After adding lithium iodide and methyl iodide, the water concentration in the reactor decreased to 4% ~ 5%, but the carbonylation reaction rate remained at a high level, thus greatly reducing the separation cost of the device. The change of catalyst composition makes the reactor run at low water concentration (4% ~ 5%), which improves the yield and separation and purification ability of carbonylation reaction.