摘要:
A process for preparing aluminophosphate compounds (and substituted derivatives) of the structural type VFI. This preparation process is characterized in that the speed of increase in temperature of the reaction mixture is greater than 250.degree. C./hour, the total time of heating of the reaction mixture, including the rise in temperature and the plateau heating, being less than one hour. The temperature of the plateau heating is between 100.degree. and 200.degree. C.The synthetic compounds in accordance with the invention possess(a) a general formula approximating to the following:1 Al.sub.2 O.sub.3 0.75-1.25 P.sub.2 O.sub.5 0-0.5 XO.sub.n/2 0-0.05 R y H.sub.2 OwhereX represents a heteroatom chosen from the group consisting of silicon, cobalt, magnesium and zinc;n is the degree of oxidation of the heteroatom X;y, the number of water molecules contained in the said compound, is greater than 0.001; andR is an organic compound chosen from the group consisting of secondary amines, tertiary amines, and quaternary ammonium salts and hydroxides;(b) an X-ray diffraction diagram as represented in Table I of the description.
摘要翻译:制备结构型VFI的磷酸铝化合物(和取代的衍生物)的方法。 该制备方法的特征在于,反应混合物的温度升高速度大于250℃/小时,反应混合物的总加热时间(包括温度升高和平台加热)小于 一小时。 平台加热的温度为100至200℃。根据本发明的合成化合物具有(a)接近于以下的通式:1 Al 2 O 3 0.75-1.25 P 2 O 5 0-0.5 XOn / 2 0-0.05 其中X表示选自硅,钴,镁和锌的杂原子; n是杂原子X的氧化度; y,所述化合物中含有的水分子数目大于0.001; 并且R是选自仲胺,叔胺和季铵盐和氢氧化物的有机化合物; (b)如说明书的表I所示的X射线衍射图。
摘要:
The object of the invention is a synthetic crystalline zeolite of the beta type characterized by:a) the following approximate general formula:M.sub.2/n O, Al.sub.2 O.sub.3, xSiO.sub.2where M represents a proton and/or a metallic cationn is the valence of Mx is a number ranging from 5 to 800,b) an X-ray diffraction diagram represented in table I of the description, andc) a fluorine content ranging from about 0.005 to 2.0% by weight, said zeolite having been furthermore synthetized in a fluoride medium.
摘要:
The invention is concerned with a catalyst comprising a matrix, a MFI type zeolite and at least one group VIII element, in which the crystals of the MFI type zeolite are desaluminated on their outer surface by at least one treatment with at least one solution of a fluorosilicate of a cation selected from the group formed by NH4+, alkylammoniums, K+, Na+, Li+, Ba2+, Mg2+, Cd2+, Cu+, Cu2+, Ca2+, Cs+, Fe2+, Co2+, Pb2+, Mn2+, Rb+, Ag+, Sr2+, Zn2+, Tl+ and H+, the global desalumination rate of said MFI zeolite thus treated being less than 5 atomic per cent.
摘要:
The invention concerns a process for isomerising a feed containing essentially hydrocarbons, preferably paraffins containing principally 4 to 8, preferably princiapply to 6 and more principally 5 and/or 6 carbon atoms per molecule, comprising a fractionation zone and at least two isomersation reaction zones, said process comprising carrying out the following steps:(1) sending the feed to a fractionation zone;(2) drawing off at least a portion of the liquid circulating in said zone, via at least two draw-off levels; and(3) sending the major portion of the liquid drawn off in step (2) to at least two isomerisation zones, each isomerisation zone being associated with a draw-off level.
摘要:
The invention relates to an alkylation process, in which a charge incorporating at least one isoparaffin and at least one olefin containing 2 to 6 carbon atoms per molecule, is treated in the presence of a solid alkylation catalyst. In the process, catalyst present in a reaction R is contacted with the charge, recycled liquid effluent discharged from reaction zone R and liquid effluent discharged from an isobutane/n-butane/alkylate separation zone S. The process uses a specific catalyst, e.g., sulfuric acid impregnated on a porous support.
摘要:
The invention relates to a synthetic crystalline zeolite of the MTW type, characterized by:a) the following approximate general formula:M.sub.2/n O, Al.sub.2 O.sub.3, xSiO.sub.2 in which M represents a metal cation and/or proton, n is the valency of M and x is a number between 14 and 800,b) a X-ray diagram shown in table I of the description,c) a fluorine content between approximately 0.005 and 2% by weight, said zeolite having been synthesized in a fluoride medium and accompanied by stirring.
摘要:
Synthetic crystalline zeolite of the MFI type and its preparation process, said zeolite being characterized by:a) the following approximate general formula:M.sup.+.sub.(x+y) [Si.sub.(96-(x+y)) Al.sub.x Ga.sub.y 0.sub.192 ].sup.(x+y).sup.- in which M represents an alkaline cation and/or ammonium cation and/or a proton, x is a number between 0 and 24, y is a number between 0 and 24, (x+y) is a number between 0.64 and 24 and preferably between 1.88 and 19.2,b) a X-ray diagram of its ammonium form shown in Table I of the description andc) a fluorine content of its ammonium form between approximately 0.01 and 2.0% by weight, said zeolite having been synthesized in a fluoride medium and in the absence of an organic agent.
摘要:
Impregnated catalyst based on silica and a solid state sulfuric acid and its use in the catalytic alkylation of isobutene and/or isopentane in the presence of at least one olefin having 3-6 carbon atoms per molecule. The catalyst may contain an additive, e.g., B(OH).sub.3, HBF.sub.4, H.sub.3 PO.sub.4, FSO.sub.3 H, CF.sub.3 SO.sub.3 H, SbF.sub.5, CF.sub.3 COOH, and SO.sub.3.
摘要翻译:基于二氧化硅和固态硫酸的浸渍催化剂及其在每分子具有3-6个碳原子的至少一种烯烃的存在下在异丁烯和/或异戊烷的催化烷基化中的用途。 催化剂可以含有添加剂,例如B(OH)3,HBF 4,H 3 PO 4,FSO 3 H,CF 3 SO 3 H,SbF 5,CF 3 COOH和SO 3。
摘要:
Process for recovery of hydrogen in an effluent that is rich in hydrocarbons and that also contains hydrogen and a light olefin fraction, whereby said process comprises: a stage a) in which said effluent is brought into contact with at least one reagent that can react with said olefins to form with them a complex or a molecule; a stage c) in which the effluent that is obtained from stage a) is brought into contact with a composition that comprises at least one unsaturated compound in the presence of a suitable catalyst under hydrogenation conditions of at least a portion of said unsaturated compound by at least a portion of the hydrogen that is present in said effluent; a stage d) in which a reaction for dehydrogenation of hydrocarbons that are present in the effluent that is obtained from stage c) is carried out.
摘要:
The invention concerns a catalyst comprising a porous organic or inorganic support and at least one active phase comprising at least one acid selected from acids with formula R--SO.sub.3 H, where R is fluorine or an alkyl group or a fluorinated alkyl group, and at least one weakly basic aprotic organic solvent, the support having been impregnated with the active phase, the catalyst being such that it is essentially constituted by particles with an average diameter in the range 0.1 .mu.m to 150 .mu.m, and being such that before impregnation with the active phase, the support has a total pore volume in the range 0.5 cm.sup.3 /g to 6 cm.sup.3 /g. The invention also concerns the use of the catalyst for aliphatic alkylation.