The invention belongs to the field of natural
organic chemistry, relating to a method for enriching and purifying procyanidin in pine
bark. The method is characterized in that an intermittent
distillation and
macropore adsorbent resin
coupling technology is used to separate and purify the procyanidin, and the technology is good for absorption selectivity of the procyanidin; and by using the intermittent
distillation and
macropore adsorbent resin
coupling technology, absorption is quick and deabsorption is also quick,
absorption capacity is large, extraction is convenient and quick,
raw material source is rich, production cost is low, separation effect is obvious, extraction purity is high, above 50% of semi-finished product procyanidin and above 95% of final product procyanidin can be achieved, and the defects of low conventional extraction rate and low extraction purity are overcome. In the method, the
macropore adsorbent resin which has the advantages of stable physicochemical property, large surface area, fast exchange speed, high
mechanical strength, strong
pollution resistance capability and good
heat stability is selected, the procyanidin is selectively absorbed from solution through physical absorption, absorption is quick and deabsorption is also quick, and
absorption capacity is large.