1.      Ointment collecting ratio has increased by 10～15 percent over that of multifunctional tank, and the effective components of ointment has raised by more than 100 percent. In the process of extracting, hot solvent adds to the ointment continuously, goes through the ointment layer from upper to lower fast and dissolves the solute, and the contain of solute keeps latitude with that of solvent, and the solute of ointment dissolves out fast until completely dissolved. So the extracting ratio of the effective components is high. In addition, the extracting process has finished in a set of closed equipment, so the loss ratio is very low, the exchanging rate is high, the ointment-collecting ratio is high, and the effective ointment content is high.

2.      The solute dissolving out fast shortens the extracting time, concentrating and extracting going in the same pace, so it costs only 7-8 hours to extract from the medicine material to the ointment.

3.      The equipment is simple, the occupying area is small, the use ratio is high, so it can reduce the investment.

4.      During the process, it needs to add the solvent only one time, recycling used in a set of closed equipment, the solvent of medicine residue can be basically recycled, so the solvent cost can be reduced by more than 30% compared to that of extraction tank, cost ratio can reduce by 50%～70%, which pave a smooth way for extracting organic solvent and purifying the effective component of Chinese medicine.

5.      The extracting heat source comes from the concentrating second-time steam, and the temperature of the feeding extracting liquid is the same with the concentrating temperature, so it can save above 50 percent steam. And it is convenient to operate, reducing the operator quantity