摘要:
The invention features a method for treating a supported catalyst with a sulphur compound based active phase and a mercury compound contaminated mineral support. This method consists in implementing the following steps: the said catalyst is contacted with a basic aqueous solution of at least one sulphide selected among alkaline metal sulphides, alkaline-earth metal sulphides or ammonium sulphide; then the catalyst is separated from the basic aqueous solution. At the end of this process, the treated catalyst shows the same characteristics as before its contamination by mercury.
摘要:
The invention relates to a catalyst and a catalytic process for the aromatization of hydrocarbons containing 2 to 4 carbon atoms per molecule.The catalyst contains a MFI zeolite and an amorphous matrix containing at least one noble metal from the platinum family, at least one additional metal chosen from tin, germanium, lead and indium and at least one alkali metal or alkaline earth metal.
摘要:
A MFI-based gallosilicate type catalyst is described.The catalyst is characterized by the following composition expressed by weight:a) 0.1 to 99.49% of a matrix,b) 0.5 to 99.99% of a zeolite having the following approximate chemical formula:M.sub.2/n O, Ga.sub.2 O.sub.3, xSiO.sub.2 whereinM represents a proton and/or a metallic cation,n is the valence of said cation,x is a number ranging from 12 to 1,00, the zeolite of MFI structure synthesized in a fluoride medium having a fluorine content ranging from 0.02 to 1.5% by weight incorporated during synthesis.The catalyst is notably used in aromatization reactions of light C.sub.2 -C.sub.4 gases in the presence or not of olefins.
摘要:
The present invention concerns a new decationized, dealuminated and stabilized zeolite of L type, characterized particularly by:a total SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 8,a potassium content lower than 2.9% by weight,parameters a and c of the elementary mesh respectively lower than 1.836 nm and 0.754 nm,a nitrogen adsorption capacity at 77 K, for a partial pressure P/Ps of 0.19, higher than 11% by weight,a benzene adsorption capacity at 30.degree. C., for a partial pressure P/Ps of 0.25, higher than 8.5% by weight, anda lattice of mesopores whose radii, measured by nitrogen adsorption-desorption at 77 K according to the BJH method, range from 0.8 nm to 20 nm.
摘要翻译:本发明涉及一种新型的分解,脱铝和稳定的L型沸石,其特征在于特征在于:总SiO 2 / Al 2 O 3摩尔比至少为8,钾含量低于2.9重量%,基本网格的参数a和c 分别低于1.836nm和0.754nm,对于分压P / Ps为0.19,高于11重量%,在30℃下的苯吸附容量为77K时的氮吸附容量,对于分压P / Ps为0.25,高于8.5重量%,并且根据BJH方法在77K下通过氮吸附 - 解吸测定的半径为0.8nm〜20nm的中孔的晶格。
摘要:
A catalyst for isomerizing a hydrocarbon cut of high n-paraffin content is disclosed. The catalyst is obtained by controlled oxychlorination of a solid containing at least one group VIII metal supported on an acid mordenite, said mordenite having a sodium content lower than 0.2% by weight, adsorbing molecules of a kinetic diameter larger than about 6.6 Angstroms, having a mesh volume, V, of the elementary mesh from 2.73 to 2.78 nm.sup.3 and a benzene adsorption capacity higher than 5% by weight, said oxychlorination being conducted at a temperature of about 200.degree.-500.degree. C. by means of a gas mixture containing oxygen, water, chlorine or at least one chlorinated compound used in a total amount from 0.5 to 10% by weight of chlorine, in proportion to the mordenite weight. The catalyst may further contain a matrix, the mordenite amount being at least 40% by weight of the total amount of mordenite and matrix.
摘要:
A catalytic reforming process using catalysts containing a carrier, platinum, rhenium and optionally at least one metal selected from the group consisting of tin, germanium, lead, indium, thallium and titanium, arranged in several successive catalyst beds wherein the catalyst of the first bed has a Re/Pt ratio higher than the Re/Pt ratio of the catalyst used in the last bed, said catalyst of the last bed containing at least 0.08% of rhenium in proportion to the carrier.The catalysts preferably contain at least one halogen in an amount, expressed in proportion to the carrier, from 0.1 to 15%, said carrier preferably consisting mainly of alumina.In a preferred embodiment 3 successive catalyst beds are used wherein the Re/Pt ratios are, as a whole, decreasing from the first bed to the last bed.
摘要翻译:一种使用催化剂的催化重整方法,其中催化剂含有载体,铂,铼和任选的至少一种选自锡,锗,铅,铟,铊和钛的金属,其布置在几个连续的催化剂床中,其中第一床的催化剂 Re / Pt比高于最后一个床中使用的催化剂的Re / Pt比,最后一个床的催化剂含有与载体成比例的至少0.08%的铼。 催化剂优选含有至少一种与载体成比例地表示的卤素,为0.1至15%,所述载体优选主要由氧化铝组成。 在优选的实施方案中,使用连续的催化剂床,其中Re / Pt比率总体上从第一床到最后一床减小。
摘要:
Process for regenerating or activating a catalyst for isomerizing n-paraffins, containing at least one group VIII metal supported on an acid mordenite, wherein, after having lost at least a part of its initial activity, said catalyst is treated in a first step with an oxygen-containing gas at a temperature lower than about 550.degree. C., so as to remove the major part of the catalyst coke content, and in a second step the resultant product from the first step is oxychlorinated to a temperature of about 200.degree.-500.degree. C. by means of a gas mixture containing oxygen, water and chlorine or at least one chlorinated compound, said chlorine or chlorinated compound being used in a total amount of 0.5-10% by weight, calculated as chlorine, in proportion to the mordenite weight.
摘要:
For the selective hydrogenation of a hydrocarbon charge containing at least one acetylenic and/or diolefinic hydrocarbon, there is used a catalyst comprising at least one group VIII metal selected from the platinum, palladium, nickel and cobalt group, or a compound thereof, and at least one metal from the group comprising germanium, tin and lead or a compound thereof, wherein at least one compound from one of the above-defined group VIII metals and at least one compound of metal from the germanium, tin and lead group is incorporated in a carrier, e.g., alumina, and wherein the compound of metal from the germanium, tin and lead group is incorporated in the carrier as a hydrocarbyl compound of said metal.
摘要:
Spent lead catalysts containing contaminating amounts of arsenic values, e.g., mixed oxides of lead and arsenic, are regenerated and rendered suitable for reuse by heat-treating same at a temperature of at least 550.degree. C. in the presence of a gas mixture which comprises an inert gas, e.g., Ar, N.sub.2 or He, and at least 2% by volume of at least one reducing gas, e.g., H.sub.2, CO or CH.sub.4.
摘要:
For the catalytic aromatization of hydrocarbons containing 5 to 9 carbons atoms per molecule, use is made of a catalyst containing a MFI zeolite containing at least one noble metal from the platinum family and at least one additional metal chosen from the group constituted by tin, germanium, lead and indium, and optionally an amorphous matrix.