摘要:
For the oligomerization of a fatty ester or fatty acid containing conjugated double bonds, the reaction uses a catalyst consisting of an activated earth, e.g., montmorillonite, at a temperature of from 100.degree.-180.degree. C., preferably from 130.degree.-160.degree. C. The process can be carried out continuously or in a batch process on a fixed bed and is particularly applicable to conjugated methyl esters obtained by conjugating and transesterifying sunflower seed oil. The oligomerized products obtained are particularly useful as lubricants or polycondensation reactants.
摘要:
Co dimerization is conducted of at least one monoolefin, for example a monoolefinic hydrocarbon such as ethylene, propylene or 1-butene, a halogenated monoolefin such as vinyl chloride, or an olefinic functional compound such as methyl acrylate, acrylonitrile, allyl acetate or vinyl acetate, with at least one polyolefin containing at least two conjugated or unconjugated ethylene bonds, for example a diene hydrocarbon such as 1,3-butadiene, piperylene, or isoprene or a polyolefin containing a carboxylic function, such as a fatty acid or a fatty acid ester having 14 to 24 carbon atoms in the fatty chain derived, for example, from a natural oil. The reaction is carried out in the presence of a catalytic system having general formula [RhX.sub.4 ][YR.sub.4 ] where X represents a halogen ion or a SO.sub.4.sup.--, SO.sub.3.sup.-, OH.sup.-, OR.sup.- or R.sup.- group, at least one X being a halogen ion, Y represents a nitrogen atom or a phosphorous atom, and R represents an alkyl, cycloalkyl, alkenyl, aryl, alkylaryl, polystyryl, alkyl polystyryl or acyl radical.
摘要:
A linear olefin is manufactured by contacting a fatty acid or ester with a catalyst comprising nickel and at least one metal from the group consisting of tin, germanium and lead at 200.degree.-400.degree. C.
摘要:
The invention concerns a process for manufacturing a composition of fatty acid esters useful as gas oil substitute motor fuel, said composition containing at least one hydrated ethyl alcohol.The process comprises:(A) A first acid transesterification step in the presence of at least one aliphatic, linear or branched monoalcohol of 1 to 5 carbon atoms, consisting at least partly of hydrated ethyl alcohol containing 1 to 60% by weight of water, said step leading to the formation of a phase mainly containing ethyl esters after removal of the produced glycerol phase,(B) A second step wherein the initial free acidity or that formed during the first step in the phase containing the esters is decreased to a value at most equal to about 2%; and(C) A third step of basic transesterification of the phase resulting from step B, in the presence of at least one aliphatic, linear or branched monoalcohol of 1 to 5 carbon atoms, with the recovery of the so-formed ester composition.The composition of the invention can be used for combustion in Diesel engines.
摘要:
For the production of ethyl esters of fatty acids from fatty acid glycerides such as vegetable or animal oil or fat or other mixtures of glycerides, the process comprises the following stages: (a) transesterifying fatty acid glycerides with hydrated ethyl alcohol using an alkaline catalyst to form a medium comprising ethyl esters and excess ethyl alcohol; (b) adding a glycerine phase to said medium, and evaporating the excess ethyl alcohol to produce two immiscible phases, an ester phase and a glycerine phase A, and recycling said excess ethyl alcohol to stage (a); (c) separating said glycerine phase A and said ester phase to obtain the desired ethyl esters; (d) neutralizing said glycerine phase A with acid, and separating resultant "fatty acids+esters" phase and a glycerine phase B, and drying the latter phase; (e) subjecting the "fatty acids+esters" phase to glycerolysis with at least a fraction of the dried glycerine phase B in the presence of an alkaline catalyst to form a mixture of glycerides and esters, and passing said mixture into transesterification stage (a).
摘要:
A novel family of chemical compounds derived from fatty compounds has two branches of two carbon atoms on the linear chain and general formula C.sub.21 H.sub.39 COOR where R represents a hydrogen atom, a lower alkyl radical or a glyceryl radical. Particular compounds for consideration have the following formulae:(C.sub.2 H.sub.5).sub.2 C.sub.17 H.sub.29 COOR (I)(C.sub.2 H.sub.5)(C.sub.2 H.sub.4)C.sub.17 H.sub.30 COOR (II)and(C.sub.2 H.sub.5)(C.sub.2 H.sub.3)C.sub.17 H.sub.31 COOR (III)also compounds with the following formulae derived from partial or total hydrogenation of the above:(C.sub.2 H.sub.5).sub.2 C.sub.17 H.sub.31 COOR (IV)(C.sub.2 h.sub.5)(C.sub.2 h.sub.4)C.sub.17 H.sub.32 COOR (V)andti (C.sub.2 H.sub.5).sub.2 C.sub.17 H.sub.33 COOR (VI)Compounds with formulae (I), (II) and (III) may be produced by addition of ethylene to compositions comprising mainly diunsaturated C.sub.18 fatty acids; or to lower alkyl or glyceryl esters of these acids, originating in particular from natural oils, in the presence of a catalytic system containing anionic rhodium of the type [RhX.sub.4 ].sup.- YR'.sub.4 where X is preferably a halide anion; Y is a nitrogen N.sup.+ or phosphorous P.sup.+ atom and R.sup.' is preferably a hydrocarbon group.Compositions in accordance with the invention can be used as base compositions for lubricants or emulsifying agents.
摘要翻译:衍生自脂肪族化合物的化学化合物的新型家族在直链上具有两个碳原子的分支,通式为C 21 H 39 COOR,其中R表示氢原子,低级烷基或甘油基。 考虑的具体化合物具有下式:(C 2 H 5)2 C 17 H 29 COOR(I)(C 2 H 5)(C 2 H 4)C 17 H 30 COOR(II)和(C 2 H 5)(C 2 H 3)C 17 H 31 COOR 上述:( C2H5)2C17H31COOR(Ⅳ)(C2h5)(C2h4)C17H32COOR(Ⅴ)和(C2H5)2C17H33COOR(VI)式(Ⅰ),(Ⅱ)和(Ⅲ)化合物可以通过加入乙烯 主要包含二不饱和C18脂肪酸的组合物; 或者在含有[RhX4] -YR'4类型的阴离子铑的催化体系存在下,将这些酸的烷基或甘油酯特别地衍生自天然油,其中X优选为卤化物阴离子; Y是氮N +或磷P +原子,R'优选为烃基。 根据本发明的组合物可用作润滑剂或乳化剂的基础组合物。
摘要:
A description is given of an improved process for the production of esters from fatty substances having a natural origin (animal and vegetable oils) and low molecular weight alcohols, in which the soaps and oily compounds entrained in the alkaline phases are recycled by treating them, following acidification and separation, with a fraction of the glycerol phase produced, in the presence of an alkaline catalyst and for forming preferably a triglyceride or a partly substituted glyceride.This process makes it possible to quantitatively obtain methyl, ethyl, propyl or butyl esters usable as a substitute for gas oil.
摘要:
A cobalt catalytic system that makes it possible to obtain branched compounds from fatty substances by reacting simple olefins on polyunsaturated esters, which may or may not be conjugated, is described.The compounds that are obtained may be hydrogenated and used as lubricant bases.
摘要:
In order to produce a composition of esters of linear monocarboxylic acids containing 6 to 26 carbon atoms and glycerine simultaneously with high degrees of purity, the following is carried out:a step a) in which a plant or animal oil, which may or may not be acidic, is reacted with an excess of at least one aliphatic mono-alcohol containing 1 to 4 carbon atoms in the presence of a heterogeneous catalyst, eliminating the excess mono-alcohol and separating out glycerine, this step producing a crude ester containing residual mono-glycerides;a step b) in which the crude ester obtained undergoes transesterification or esterification of the residual mono-glycerides to di- and tri-glycerides, in the presence of a heterogeneous catalyst; anda step c) in which the ester composition is evaporated under reduced pressure, recycling the evaporation residue to the starting oil of step a). The ester compositions obtained, which are of high purity, are of particular use as gas oil substitutes.
摘要:
For the production of linear monocarboxylic acid esters with 6 to 26 carbon atoms vegetable oils or animal oils, which may or may not be neutral, are reacted with monoalcohols having a low molecular weight, for example 1 to 5 carbon atoms, in the presence of a catalyst that is selected from among zinc oxide, mixtures of zinc oxide and aluminum oxide, and the zinc aluminates that correspond to the formula:ZnAl.sub.2 O.sub.4, x ZnO, y Al.sub.2 O.sub.3(with x and y each being in the range of 0-2) and having more particularly a spinel type structure, thereby enabling the direct production in one or more stages, of an ester that can be used as a fuel or combustible and a pure glycerine.
摘要翻译:对于具有6至26个碳原子的线性单羧酸酯的生产,可以是或可以不是中性的植物油或动物油与具有低分子量,例如1-5个碳原子的一元醇在存在 选自氧化锌,氧化锌和氧化铝的混合物的催化剂和对应于下式的ZnAl 2 O 4,x ZnO,y Al 2 O 3(x和y各自在0-2范围内)的铝酸锌, 并且更具体地具有尖晶石型结构,从而能够在一个或多个阶段直接生产可用作燃料或可燃物的酯和纯甘油。