摘要:
Polyols are produced by an alkoxylation process in which a vegetable oil containing hydroxyl functional groups is combined with a DMC catalyst to form a mixture, the DMC catalyst is then activated by adding ethylene oxide and/or propylene oxide to the vegetable oil/catalyst mixture, and ethylene oxide and propylene oxide are added to the mixture containing activated DMC catalyst in amounts such that the total of percentage of ethylene oxide in the polyol plus percentage of primary hydroxyl groups in the polyol produced is from 50 to 77% and the percentage of primary hydroxyl groups is at least 30% but less than 50%. These polyols are useful for the production of molded polyurethane foams, particularly, hot-cure molded polyurethane foams.
摘要:
The present invention generally concerns a process for the purification of crude glycerol obtained as a by-product of industrial processes such as saponification, hydrolysis and transesterification with low chain alcohols of natural oils and fats. The present invention particularly concerns the purification treatment of crude glycerol obtained as a by-product of the biodiesel production from vegetable oils and animal fats, aiming to obtain a concentrated purified product.
摘要:
The present invention is directed to Mixture of esters according to the general formula (I), R 1 -C(=O)-O-R 2 , wherein R 1 is an alkyl moiety with 5 to 11 carbon atoms and wherein R 2 is a an alkyl moiety with 8 to 1 carbon atoms and wherein the mixture comprises 10 or less than 10 weight-% of ester of the general formula (I), wherein R 1 is an alkyl moiety with 9 or more carbon atoms, based on the total amount of esters according to formula (I). The invention is further directed to cosmetic and/or pharmaceutical compositions comprising such esters as well as to processes for the production of such esters.
摘要:
Process for preparation of a supported catalyst based on hydroxylated inorganic material selected from the group consisting of silica (SiO 2 ), alumina (Al 2 O 3 ), titania (TiO 2 ), zirconia (ZrO 2 ), lanthanum oxide (La 2 O 3 ) or mixtures thereof, characterized in that the hydroxylated inorganic material is contacted with organosilicon compounds selected from the group consisting of Formula 1 i.e., [(RO) y Si-[O-(RO) y Si] y -O-Si(RO) y ] or Formula 2 i.e., (RO) y -Si-R 1 -S 2-4 -R 1 -Si-(RO) y with R being alkyl and R 1 being a linear or branched alkylene having from 1 to 5 carbon atoms and y being an integer from 1 to 3.
摘要翻译:过程基于选自二氧化硅(SiO 2),氧化铝的选择羟基化无机材料制备的负载型催化剂比(Al 2 O 3),氧化钛(TiO 2的),氧化锆(氧化锆),氧化镧(La 2 O 3)或它们的混合物,dadurch gekennzeichnet,DASS死羟基化无机材料与选自式1即,([(RO)y的SI-[O-(RO)y的硅 - ] Y -O-Si中选择的有机硅化合物接触 RO)Y]或式2即,(RO)Y的Si-R 1 -S 2-4 -R 1 -Si(RO)y的其中R是烷基,并且R 1为直链或支链亚烷基具有1至 5个碳原子和y是从1至第三的整数
摘要:
Composition comprising at least one ester of one or more saturated C 18 fatty acids and an alcohol, wherein the fatty acids have between 1 and 3 pairs of vicinal ester groups of formula R 1 COO-, the two vicinal ester groups in each pair being different, R 1 is a radical independently selected from linear or branched (C 1 -C 18 ) alkyl; and the alcohol is selected from the group consisting of a (C 1 -C 15 ) linear or branched monohydric alcohol and a (C 2 -C 6 ) polyhydric alcohol having between 2 and 4 hydroxyl groups obtainable by a process comprising: a) epoxidizing a product comprising at least an ester of an unsaturated C 18 fatty acid and of an alcohol; followed by ring opening of the epoxide and b) reacting the compound obtained in step a) with a (C 1 -C 18 ) linear or branched carboxylic acid different from the one used in step a). The composition obtainable by the process of the invention is useful as lubricant base stock oil or as an additive to modulate the viscosity and/or the pour point of lubricant compounds.