摘要:
A method for synthesizing alkyl glucosides by the acetalization of sugars, particularly glucose, with alcohols in excess and subsequent separation of the excess alcohol by extraction, the extraction being carried out with an extraction agent, which is close to the critical point at a reduced pressure in the range of 0.8 to 1.3 and preferably of 0.9 to 1.2 at pressures, which are selected so that the density of the extraction agent, which is close to the critical point, is greater than 180 kg/m.sup.3.
摘要翻译:通过将醇,特别是葡萄糖与醇过量缩合并随后通过萃取分离过量的醇来合成烷基葡糖苷的方法,用萃取剂进行萃取,该提取剂在减压下接近临界点 在0.8至1.3的范围内,优选在0.9至1.2的压力下进行选择,使得接近临界点的萃取剂的密度大于180kg / m 3。
摘要:
The invention relates to a method for separating alkyl glycoside mixtures or alcohol-containing alkyl glycoside mixtures by extraction, which is characterized in that the extraction is carried out with an extraction agent, which is close to or below the critical point at a reduced temperature ranging from 0.9 to 1.2, and at pressures, which are selected so that the density of the extraction agent is at least 180 kg/m.sup.3.
摘要翻译:本发明涉及一种通过提取分离烷基糖苷混合物或含醇烷基糖苷混合物的方法,其特征在于用提取剂进行萃取,该提取剂在降低的温度范围内接近或低于临界点 0.9至1.2,并且在压力下,其选择使得提取剂的密度为至少180kg / m 3。
摘要:
The invention relates to a process for recovering monoglycerides and optionally diglycerides and/or triglycerides as well as optionally glycerol from mixtures comprising glycerides and glycerol containing glycerides, respectively, by countercurrent extraction with a circulating extraction. As an extractant, forming a separate phase, there is used a hydrocarbon having a density of more than 180 kg/m.sup.3 and/or trifluoromethane having a density of more than 180 kg/m.sup.3.
摘要翻译:本发明涉及通过循环提取的逆流提取来分别回收单甘油酯和任选的甘油二酯和/或甘油三酸酯以及任选的甘油,其包含甘油酯和含甘油的甘油酯的混合物。 作为萃取剂,形成分离相,使用密度大于180kg / m 3的烃和/或密度大于180kg / m 3的三氟甲烷。
摘要:
The invention relates to a process for the preparation of fatty acid esters from fats and oils of biological origin by transesterification with monohydric alcohols in the presence of basic catalysts, the catalysts being salts of a basic organic compound and carbonic acid.
摘要:
The invention relates to a process for the preparation of fatty acid esters from fats and oils of biological origin by transesterification with monohydric alcohols in the presence of basic catalysts, the catalysts being salts of a basic organic compound and carbonic acid.
摘要:
A method for removing free fatty acids from fats or oils of biological origin or their steam distillates by extracting the free fatty acids with a mixture of basic organic nitrogen compounds and water as an extraction medium at a temperature below the boiling point of the organic nitrogen compounds. The content of the basic organic nitrogen compounds in the extraction medium is 20-30% by weight. In this manner, the formation of a viscous soapstock which is difficult to remove is prevented. The boiling point of the basic organic nitrogen compounds used is the same as or above boiling point of water and below the boiling point of the fatty acids to be extracted in order to enable simple recovery of the extraction medium.
摘要:
The invention concerns a method for producing fatty acid esters from fatty acid triglyceride and in particular from animal or vegetable fats and oils by transesterification with a monovalent low-molecular weight alcohol in the presence of a homogeneous or heterogeneous catalyst. In accordance with the invention, the formed fatty acid ester is extracted from the reaction mixture by means of a near-critical extractant. In this way fatty acid esters are obtained at high yield and excellent purity. As the extractant preferably a low pressure gas having a reduced temperature at 20° C. of about 0.7, preferably of equal to or greater than 0.7, is employed. Preferred extractants are carbon dioxide, propane, butane, dimethyl ether, ethyl acetate or mixtures thereof.
摘要:
A process for preparing fat and/or oil with a modified distribution of fatty acids in the glycerides by heterogeneously catalysed transesterification, wherein the process comprises reaction of the fat and/or oil of biological origin to be transesterified in the presence of a catalyst consisting of a metal salt of a basic amino acid or an amino acid derivative. The disadvantages of conventional transesterification processes can be overcome by using this catalyst.
摘要:
A process is described for extracting carotenes from carotene-containing materials, in particular from fats and oils of biological origin, which provides for extraction of carotene-containing material with an extractant comprising at least one member selected from the group consisting of acetonitrile, N-methylpyrrolidone, N,Ndimethylformamide, N,N-dimethylacetamide, 4-formylmorpholine, 4-acetylmorpholine, 4-methylmorpholine, 4-phenylmorpholine.
摘要:
The present invention relates to a process for obtaining fatty acid esters from triglycerides by means of alcoholysis. In particular, the invention relates to a process for the transesterification of fat and/or oil by alcoholysis wherein, in order to accelerate the process in the initial stage, at least one alkanol fatty acid ester is added in a quantity such that the reaction mixture produced thereby consists of one phase. A high reaction rate can thereby be maintained in the process from the beginning.