摘要:
Extraction process wherein a supercritical fluid, or the same fluid in liquid state under near critical conditions, is used to extract the ceroid fraction of cork smoker wash solids and to isolate (C 20 - C 26 ) long chain aliphatic alcohols, diterpenoid and triterpenoid compounds contained in said fraction. The extracts containing diterpenes, triterpenoids, long chain aliphatic alcohols, or mixtures thermos enriched in these compounds are submitted to fractionation, these compounds being isolated from the extracts. Extraction may be carried out in a batch or semi-batch mode at temperatures between 30°C and 100°C, the preferred temperature range being between 30°C and 50°C and at pressures between 6 MPa and 40 MPa (60 bar and 400 bar). Pressure and temperature may be changed during the extraction, or may be kept constant. The separation is carried out at temperatures between 20°C - 120°C and at pressures between 40 MPa (400 bar) and the atmospheric pressure. The fractionation may be carried out using separators, or in a column.
摘要:
Salts of a pharmacologically active, naturally occurring or synthetic alkaloids, or alkaloid derivatives and a phosphatidic acid are provided, which preferably have the formula
wherein
Alk represents a cation derived from said pharmacologically active, naturally occurring or synthetic alkaloid, or alkaloid derivative, PA represents a phosphatidic acid or a mixture of different phosphatidic acids, and x:y is from 2:1 to 1:2.
The therapeutic use of the salts of the invention inthe treatment of syndromes affecting the elderly, particularly conditions that are related to changes in cerebral metabolism and reduced blood flow are decribed, as well as cosmetic methods.
摘要:
The present invention concerns a method for extracting cytisine from biomaterial wherein the biomaterial is contacted with an alkaline aqueous solution, but in the absence of any other co-solvent such as an organic phase. Cytisine is recovered from the alkaline aqueous extract by extraction of the extract with rapeseed oil which in turn is extracted with an acidic aqueous phase.
摘要:
Extraction process wherein a supercritical fluid, or the same fluid in liquid state under near critical conditions, is used to extract the ceroid fraction of cork smoker wash solids and to isolate (C 20 - C 26 ) long chain aliphatic alcohols, diterpenoid and triterpenoid compounds contained in said fraction. The extracts containing diterpenes, triterpenoids, long chain aliphatic alcohols, or mixtures thermos enriched in these compounds are submitted to fractionation, these compounds being isolated from the extracts. Extraction may be carried out in a batch or semi-batch mode at temperatures between 30°C and 100°C, the preferred temperature range being between 30°C and 50°C and at pressures between 6 MPa and 40 MPa (60 bar and 400 bar). Pressure and temperature may be changed during the extraction, or may be kept constant. The separation is carried out at temperatures between 20°C - 120°C and at pressures between 40 MPa (400 bar) and the atmospheric pressure. The fractionation may be carried out using separators, or in a column.
摘要:
A method for extracting valuable alkaloid materials from plants containing the same comprising slurrying the comminuted plant material in a mixture of water and a cosolvent at a pH of 8.5, adding a nonpolar, water-insoluble, solvent to dissolve the alkaloid, washing the nonpolar phase with acidulated water to convert the alkaloid to the imminium ion or acid salt form, precipitating the alkaloid, and recovering and drying the alkaloid.