摘要:
An improved process for preparing a difunctional catalyst active, in the hydroisomerization of long-chain normal paraffins is disclosed, which is constituted by an amorphous silica-alumina gel and one or more metals belonging to Group VIIIIA.
摘要:
An improved process for preparing a difunctional catalyst active in the hydroisomerization of long-chain normal paraffins is disclosed, which is constituted by an amorphous silica-alumina gel and one or more metals belonging to Group VIIIA,
摘要:
Hydrogen sulfide is oxidized to sulfur by means of treatment with an aqueous acid solution containing trivalent iron and a hetero polyacid having formula (I): HnXVyM(12-y)O40; or a sole hetero polyacid having formula (II): HnMeM12O40; wherein the symbols X, M Me n and y are specified in the text. At the end of the oxidation, the solution is treated with gas containing oxygen to re-oxidize the reduced metal.
摘要翻译:通过用含有三价铁的含水酸溶液和式(I)的杂多酸(HnXVyM(12-y)O40)处理将硫化氢氧化成硫。 或具有式(II)的唯一的杂多酸:HnMeM12O40; 其中符号X,M Me n和y在文中指定。 在氧化结束时,用含氧的气体处理溶液以再还原还原的金属。
摘要:
Process for the preparation of a micro-mesoporous gel consisting of a silica matrix in which one or more metal oxides are possibly dispersed comprising: (a) subjecting to hydrolysis and gelification a tetra-alkylorthosilicate with an alkyl-trimethylammonium hydroxide having the formula R(CH3)3N—OH, wherein R is selected from n-butyl, n-pentyl, n-hexyl and n-heptyl, possibly in the presence of one or more metal compounds, the molar ratios in this mixture being: R—OH/SiO2=0-10; R(CH3)3N—OH/SiO2=0.05-0.4; H2O/SiO2=5-40; metal oxides/SiO2=0-0.02; whereas the ratio H2O/R(CH3)3N—OH varies according to the number of carbon atoms in the alkylic chain R as follows: R=n-butyl, H2O/R(CH3-)3N—OH
摘要翻译:用于制备由二氧化硅基质组成的微孔介质凝胶的方法,其中一种或多种金属氧化物可能被分散,包括:(a)使原硅酸四烷基酯与具有式R的烷基 - 三甲基氢氧化铵进行水解和凝胶化 CH3)3N-OH,其中R选自正丁基,正戊基,正己基和正庚基,可能在一种或多种金属化合物存在下,该混合物中的摩尔比为:R-OH / SiO2 = 0-10; R(CH3)3N-OH / SiO2 = 0.05-0.4; H2O / SiO2 = 5-40; 金属氧化物/ SiO2 = 0-0.02; 而H 2 O / R(CH 3)3 N-OH的比例根据烷基链R中的碳原子数按如下方式变化:R =正丁基,H 2 O / R(CH 3)3 N-OH 35; R =正戊基,H 2 O / R(CH 3)3 N-OH <70; R =正己基,H 2 O / R(CH 3)3 N-OH <102; R =正庚基,H 2 O / R(CH 3)3 N-OH <136; (b)使步骤(a)中获得的凝胶或固体进行干燥和煅烧。
摘要:
A process is described for preparing monoalkylated aromatic compounds which comprises subjecting an aromatic hydrocarbon to alkylation with an olefin containing from 2 to 4 carbon atoms, or to transalkylation with a polyalkylaromatic hydrocarbon, in the presence of ERS-10 zeolite.
摘要:
A highly selective process is described for preparing 2,6-dimethylnaphthalene which comprises reacting a naphthalene hydrocarbon selected from naphthalene, methylnaphthalenes, dimethylnaphthalenes, trimethylnaphthalenes, polymethylnaphthalenes, and/or their mixtures with one or more benzene hydrocarbons selected from benzene, toluene, xylenes, trimethylbenzenes, tetramethylbenzenes, pentamethylbenzene and/or hexamethylbenzene, under at least partially liquid phase conditions and in the presence of a catalytic composition comprising a zeolite belonging to the MTW structural type and at least one element selected from P, B and Si. The process is preferably carried out in the presence of a methylating agent.
摘要:
Hydrogen sulfide is oxidized to sulfur by means of treatment with an aqueous acid solution containing trivalent iron and a hetero polyacid having formula (I): HnXVyM(12-y)O40; or a sole hetero polyacid having formula (II): HnMeM12O40; wherein the symbols X, M Me n and y are specified in the text. At the end of the oxidation, the solution is treated with gas containing oxygen to re-oxidize the reduced metal.
摘要翻译:通过用含有三价铁的含水酸溶液和具有式(I)的杂多酸处理将硫化氢氧化成硫:H 1 H (12-y)O u> 40; 或具有式(II)的单独的多元酸:H n MeM 12 O 40; 其中符号X,M Me n和y在文中指定。 在氧化结束时,用含氧的气体处理溶液以再还原还原的金属。
摘要:
Disclosed is an active catalyst in the hydroisomerization of waxes (paraffins), which catalyst is constituted by a carrier of acidic nature, of silica-alumina gel, and one or more metals belonging to Group VIIIA. Also a process for preparing said catalyst is disclosed.
摘要:
A highly selective process is described for preparing 2,6-dimethylnaphthalene which comprises reacting a naphthalene hydrocarbon selected from naphthalene, methylnaphthalenes, dimethylnaphthalenes, trimethylnaphthalenes, polymethylnaphthalenes, and/or their mixtures with one or more benzene hydrocarbons selected from benzene, toluene, xylenes, trimethylbenzenes, tetramethylbenzenes, pentamethylbenzene and/or hexamethylbenzene, under at least partially liquid phase conditions and in the presence of a catalytic composition comprising a zeolite belonging to the MTW structural type and at least one element selected from P, B and Si. The process is preferably carried out in the presence of a methylating agent.
摘要:
Disclosed is an active catalyst in the hydroisomerization of waxes (paraffins), which catalyst is constituted by a carrier of acidic nature, of silica-alumina gel, and one or more metals belonging to Group VIIIA. Also a process for preparing said catalyst is disclosed.