Preparing method for substance of poly pentenol capsule

Preparing process and use of ginkgo leaf polypentenol and ginkgo leaf extract

The present invention provides preparation process of ginkgo leaf polypentenol and ginkgo leaf extract (GBE). Through extraction with lipophilic solvent, saponification, extraction, precipitation, column chromatography and other technological steps, oily ginkgo leaf polypentenol in 50-90% content is prepared; and through extraction of leaf residue with hydrophilic solvent, centrifugal deposition,resin adsorption, solvent extraction, drying and other technological steps, ginkgo leaf extract (GBE) powder is prepared, which contains flavone glucoside greater than 24%, terpene lactone greater than 6% and ginkgolic acid less than 5 ppm. The preparation process of the present invention can utilize gingko material comprehensively and has relatively lower production cost.

Processing art for inhibiting turning to yellow of high yield baeached pulp and and paper products contg. same

A technique for suppresing the yellowing of high-output bleached paper pulp, paper and paperboard, which are made of fast-growing wood features that a single or combined process and the invented chemical are used to treat said products by spray, cooting, or immersing to improve their optical ageing resistance.

银杏叶聚戊烯醇和银杏叶提取物（GBE）的制备方法及其用途

... 本发明提供了一种从银杏叶中制备银杏叶聚戊烯醇和银杏叶提取物(GBE)的方法。该方法通过亲脂性溶剂提取、皂化、萃取、沉淀和柱层析等工艺，制备50％-95％银杏叶聚戊烯醇油状物；同时通过亲水性溶剂对残渣叶提取、离心沉淀、树脂吸附、溶剂萃取和干燥等工艺，制备银杏叶提取物(GBE)干粉，其中黄酮甙＞24％，萜内酯＞6％，银杏酸＜5ppm。本发明提供的制备方法，可综合利用银杏叶原料，生产成本低，宜于规模型生产。按本发明制备的银杏叶聚戊烯醇具有抗肿瘤和辅助化疗的作用。 ...

Molecular distillation purification method of polyprenol

A process for purifying the polypentenol by molecular distillation includes such steps as feeding the raw polypentanol into a high-temp vacuum molecular distilling evaporator at a certani speed, distilling, feeding the distilled substance into another high-temp vacuum molecular distilling evaporator at a certain speed, and distilling to obtain the high-purity (70-95 mass%) product.