why so quite today, page-33

By the way Jezza here is proof of your point, NO CO2 IN THE PATENTED EXTRACTION PROCESS

[0014] The invention is based on a method of processing plant raw materials from green conifer needles and foliage of deciduous species, which includes the following: extraction using organic solvent; subsequent isolation by settling with cooling and filtering of waxes; separation of free acids from the obtained solution of extractive compounds in hydrocarbon solvent with alkali solution; fractionalization of the obtained neutralized solution into a solution of neutral compounds in hydrocarbon solvent and a water-alkaline solution of salts of organic adds; acidification of water-alkaline solution of salts by organic and inorganic acid and subsequent separation by settling into chlorophyllin acids, and the fatty and resin acids fraction, with subsequent fractioning of the total diterpene and higher fatty acids; distillation of solvent from the neutral compounds and separation of the neutral compounds.

[0015] This method differs from others in that: the combined diterpene and higher fatty acids are treated with low-molecular alcohol with addition of sulphuric acid as catalyst; alcohol is distilled off, diterpene acids and catalyst are neutralized by an inorganic base; esters of higher fatty acids are extracted by a hydrocarbon solvent; water-alkaline solution is acidified, and isolated diterpene acids are extracted by a hydrocarbon solvent; solvent is distilled off until the concentration of diterpene acids is 30-50%, and rodent repellent is obtained.

[0016] Neutral compounds are extracted by acetone and then by alcohol C.sub.1-C.sub.3. The mass ratio 1:2-1:5 neutral compounds: solvent is obtained by acetone treatment of concentrates of esters of higher fatty acids, triterpene alcohols, sterins and higher fatty alcohols, and acetone soluble remainder. The remainder is then retreated with alcohol, the total diterpene alcohols fraction is separated from the non-alcohol soluble compounds, which are then saponified by alcohol alkali solution to obtain polyprenols concentrate, which is then chromatographed on silica gel with substance:sorbent ratio of 1:10, using hexane, and hexane with addition of 5% of diethyl ester by volume, and hexane with addition of 10% diethyl ester by volume with sorbent:solvent ratio of 1:1, to isolate polyprenols.

Barret