摘要:
For the selective production of propylene from an olefinic C4 fraction, a process is implemented that successively comprises: 1) the selective hydrogenation of butadiene with isomerization of butene-1 into butene-2; 2) the separation by distillation of a mixture that is rich in isobutene and butene-1 at the top and a fraction that is rich in butene-2 at the bottom; 3) the skeletal isomerization of isobutene into n-butenes on the top fraction, with recycling in stage 1; and 4) the metathesis of the butene-2-rich fraction with ethylene.
摘要:
For the selective production of propylene from an olefinic C4 fraction, a process is implemented that successively comprises: 1) the selective hydrogenation of butadiene with isomerization of butene-1 into butene-2; 2) the separation by distillation of a mixture that is rich in isobutene and butene-1 at the top and a fraction that is rich in butene-2 at the bottom; 3) the skeletal isomerization of isobutene into n-butenes on the top fraction, with recycling in stage 1; and 4) the metathesis of the butene-2-rich fraction with ethylene. The advantage of this process is to produce in a very selective way polymerization-quality propylene from all of the olefinic compounds of a C4 fraction, including isobutene.
摘要翻译:对于从烯烃C 4 H 4馏分选择性生产丙烯,实施了连续包括:1)丁烯与丁烯-2的异构化的选择性氢化; 2)通过蒸馏分离富含异丁烯和顶部丁烯-1的混合物和底部富含丁烯-2的馏分; 3)将异丁烯骨架异构化为顶级馏分中的正丁烯,并在第1阶段循环使用; 和4)富含丁烯的富烯馏分与乙烯的复分解。 该方法的优点是以非常有选择的方式生产聚合优质的丙烯从C 4 S 4馏分的所有烯烃化合物,包括异丁烯。
摘要:
A composition defined: either as comprising at least one Broensted acid, designated HB, dissolved in a liquid medium with an ionic nature of general formula Q+A−, in which Q+ represents an organic cation and A− represents an anion that is different from B, or as resulting from dissolving at least one Broensted acid, designated HB, in a non-aqueous liquid medium with an ionic nature of general formula Q+A−, in which Q+ represents an organic cation and A− represents an anion that is identical to the anion B, can be used as a catalyst and solvent in acid catalysis processes, in particular in the alkylation of aromatic hydrocarbons, the oligomerization of olefins, the dimerization of isobutene, the alkylation of olefins by isoparaffins, the isomerization of n-paraffins into isoparaffins, the isomerization of n-olefins into iso-olefins, the isomerization of the double bond of an olefin and the purification of an olefin mixture that contains branched alpha olefins as impurities.
摘要:
A catalytic composition is obtained by mixing at least one chromium compound with at least one aryloxy compound of an element M selected from the group formed by magnesium, calcium, strontium and barium, with general formula M(RO)2-nXn, where RO is an aryloxy radical containing 6 to 80 carbon atoms, X is a halogen or a hydrocarbyl radical containing 1 to 30 carbon atoms and n is a whole number that can take values of 0 to 2, and with at least one aluminum compound selected from hydrocarbylaluminum compounds (tris(hydrocarbyl)-aluminum, chlorinated or brominated hydrocarbylaluminum compounds) and aluminoxanes. The catalytic composition can be used in an ethylene oligomerization process, in particular to produce 1-hexene.
摘要:
A nickel 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 or may be transformed according to known procedures into compounds of acid, alcohol, amine or amide type, used in varied applications.
摘要:
A process for carrying out a reaction on an organic feed, for example dimerization, co-dimerization, oligomerization or metathesis of olefins, as described in which the catalyst is a catalytic metal compound dissolved in a non-aqueous ionic medium which is not or is only slightly miscible with hydrocarbons. The reaction is carried out in a system comprising at least two treatment loops each comprising at least one reaction zone and at least one zone for separating the organic and polar phases between which the polar medium containing the catalytic metal compound, and the organic phase circulate. Fresh polar phase is injected into the second loop and used polar phase is eliminated from the first loop. The hydrocarbon to be transformed is injected into the first loop and the products are withdrawn from the second loop. The invention also concerns a unit for carrying out the process.
摘要:
A supported catalyst with rhenium and also containing aluminium introduced by a compound of the formula (OR).sub.qAlR'.sub.r with R being a hydrocarbyl residue with from 1 to 40 carbon atoms, R' being an alkyl residue with from 1 to 20 carbon atoms, and with q and r equal to 1 or 2 with q+r=3. A process for the preparation of a catalyst comprising impregnating a compound of rhenium on a porous support formed by refractory oxides and/or alumino-silicates of an acid, neutral or basic nature, roasting at a temperature of form 200 to 950.degree. C. and impregnating with said aluminium compound. The catalyst is used for the metathesis of olefins.
摘要翻译:具有铼并且还含有由式(OR)qAlR'r化合物引入的负载催化剂,R是具有1至40个碳原子的烃基残基,R'是具有1至20个碳原子的烷基, q和r等于1或2,q + r = 3。 一种制备催化剂的方法,包括将铼化合物浸渍在由难溶氧化物和/或酸性,中性或碱性的耐热氧化铝和/或铝硅酸盐形成的多孔载体上,在200至950℃的温度下焙烧, 用所述铝化合物浸渍。 催化剂用于烯烃的复分解。
摘要:
The present invention concerns a process for the conversion of an olefinic C.sub.4 cut to polyisobutene and to propylene by metathesis. The process comprises three successive steps: (1) selective hydrogenation of diolefins with simultaneous isomerisation of 1-butene to 2-butenes, (2) polymerisation of the isobutene, including optional prior extraction of the isobutene, (3) metathesis of 2-butene with ethylene. Part or all of the C.sub.4 cut may originate from the metathesis of an olefinic C.sub.5 cut with ethylene after hydroisomerisation of the C.sub.5 cut. Application to C.sub.4 and C.sub.5 steam cracking cuts.
摘要:
The present invention concerns new catalytic compositions containing at least one compound of rhenium and aluminium corresponding to the general formula: O.sub.3 Re--O--�Al(OR)(L).sub.x --O!.sub.n --ReO.sub.3 in which R is a hydrocarbyl residue, for example alkyl, cycloalkyl, alkenyl, aryl and aryl or cycloalkyl which are substituted, containing from 1 to 40 carbon atoms, which residue can be substituted by alkoxy groups or by halogens, L is the synthesis solvent, x is equal to 0 or 1 and n is an integer of from 1 to 10. The invention also concerns the preparation of such compositions and the use thereof for the metathesis of olefins in a homogeneous phase.
摘要翻译:本发明涉及包含至少一种铼和铝化合物的新催化组合物,其对应于通式为:O 3 Re-O- [Al(OR)(L)x O] n -R Re 3,其中R为烃基残基,例如烷基 含有1至40个碳原子的环烷基,烯基,芳基和芳基或环烷基,该残基可以被烷氧基或卤素取代,L是合成溶剂,x等于0或1,n是 本发明还涉及这种组合物的制备及其在均相中烯烃复分解的用途。
摘要:
The present invention concerns new catalysts based on compounds containing both rhenium and aluminum, which are deposited on an organic or inorganic support. The compounds of rhenium and aluminum correspond to the general formula: O.sub.3 Re--O--�Al(OR)(L).sub.x --O!.sub.n --ReO.sub.3 in which R is a hydrocarbyl residue, for example alkyl, cycloalkyl, alkenyl, aryl, and aryl or cycloalkyl which are substituted, containing from 1 to 40 carbon atoms, which residue can be substituted by alkoxy groups or by halogens, L is the synthesis solvent, x is equal to 0 or 1 and n is an integer of from 1 to 10. The invention also concerns the preparation of such catalysts and the use thereof for the metathesis of olefins.
摘要翻译:本发明涉及基于含有铼和铝的化合物的新催化剂,其沉积在有机或无机载体上。 铼和铝的化合物对应于以下通式:O 3 Re-O- [Al(OR)(L)x O] n -R Re 3,其中R是烃基残基,例如烷基,环烷基,烯基,芳基和芳基或 被取代的含有1至40个碳原子的环烷基,该残基可以被烷氧基或卤素取代,L是合成溶剂,x等于0或1,n是1至10的整数。 本发明还涉及这种催化剂的制备及其用于烯烃复分解的用途。