Products Description

The method of Industrial lactic acid production mainly includes the following steps and considerations:

Selection of suitable molecular distillation equipment: According to the study, centrifugal molecular distillation equipment is suitable for the refining of lactic acid from fermentation broth, which can effectively control the evaporation surface temperature, evaporation surface rotational speed, hot and cold surface spacing, and temperature difference between hot and cold surfaces, which will affect the purity and yield of L-lactic acid.

Optimisation of operating conditions: key operating parameters in the molecular distillation process include pressure, feed rate and rotor speed. By optimising these parameters, the purity and yield of L-lactic acid can be improved. For example, when using centrifugal molecular distillation equipment, the optimum process conditions are 0.1 Pa pressure.

Continuous distillation under high vacuum: molecular distillation is a continuous distillation process carried out under high vacuum conditions, which is particularly suitable for separating low volatility, high molecular weight, high boiling point, high viscosity, heat sensitive and biologically active materials, such as L-lactic acid. This technique is capable of volatilising materials at temperatures well below the boiling point at atmospheric pressure, thus avoiding the decomposition of lactic acid at high temperatures.

Improving vacuum during operation: To overcome the difficulty of maintaining a high vacuum during operation of a large-scale molecular distillation purification unit for lactic acid as well as the problem of low yields, the vacuum level during operation can be improved by optimising the vacuum unit of the Industrial lactic acid production unit and adopting multi-pump pumping to extract the vacuum.

No need for other dehydration and decolourisation methods: Compared with the traditional decompression distillation method, one of the advantages of molecular distillation technology is that crude lactic acid does not need to be processed by other dehydration and decolourisation methods, and high purity L-lactic acid can be obtained directly by Industrial lactic acid production molecular distillation.