摘要:
A crystalline SiO.sub.2 --modification, which is characterized by an X-ray diffraction diagram having certain diffraction lines, and a process for the preparation of this crystalline SiO.sub.2 --modification by crystallizing reactive amorphous SiO.sub.2 under hydrothermal conditions in the presence of hexamethylenediamine. Sodium ions, phosphate ions and/or sulfate ions may be added for the crystallization.
摘要:
A process for the manufacture of a nitrogen-containing crystalline metal silicate having a zeolite structure from silicon dioxide and a metal oxide and/or metal hydroxide, wherein the crystallization is carried out in the absence of an alkali metal in an aqueous solution of hexamethylenediamine, preferably under the autogeneous pressure of the solution at from 100.degree. to 200.degree. C. The zeolites are preferably used as catalysts for the reaction of methanol and/or dimethyl ether to give unsaturated hydrocarbons, the oligomerization of olefins, the alkylation of aromatics, and other conversions of hydrocarbons.
摘要:
Alkali metal beryllo-alumino-silicates of the mordenite type form, under hydrothermal conditions (100.degree.-300.degree. C in a Carius tube), from aqueous mixtures containing the structural components SiO.sub.2, Al.sub.2 O.sub.3 and BeO and alkali metal hydroxides. In beryllium-containing mordenites, ratios of SiO.sub.2 to Al.sub.2 O.sub.3 of from 10:1 to 120:1 may be achieved, whereas values of only up to 10:1 are known in the pure alumino-silicates of this type. The alkali metal beryllo-alumino-silicates are accessible to ion exchange in the same way as the beryllium-free representatives. The so-called NH.sub.4 - and H-forms obtaineable by ion exchange may be used for the synthesis of highly active sorption compositions or catalysts after calcination.
摘要翻译:在水热条件下(100℃-300℃,在Carius管中),由含有结构组分SiO 2,Al 2 O 3和BeO的水性混合物和碱金属氢氧化物形成丝光沸石型的碱金属铍铝硅酸盐。 在含铍的丝光沸石中,SiO 2与Al 2 O 3的比例可以达到10:1至120:1,而在这种纯铝硅酸盐中仅有10:1的值是已知的。 碱金属铍铝硅酸盐可以与无铍代表相同的方式进行离子交换。 通过离子交换可获得的所谓NH4-和H-形式可用于煅烧后高活性吸附组合物或催化剂的合成。
摘要:
A process for the preparation of zeolites of the ZSM-5 structural type from a mixture of SiO.sub.2 and Al(OH).sub.3 by hydrothermal crystallization in an aqueous amine solution, in the absence of alkali, at from 100.degree. to 200.degree. C., wherein the crystallization is carried out in the presence of a triamine, tetraamine and/or higher amine and the reaction mixture is formulated to have an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio defined by an equation which involves the chain length and number of amine groups of the amine employed, as well as to have certain molar ratios of H.sub.2 O/amine and amine/Al.sub.2 O.sub.3, and the use of these zeolites as catalysts for the conversion of alcohols and/or dialkyl ethers to olefins and/or aromatics.
摘要翻译:在不存在碱的情况下,在100〜200℃下,通过在胺水溶液中水热结晶,从SiO 2和Al(OH)3的混合物中制备ZSM-5结构型沸石的方法, 其中所述结晶在三胺,四胺和/或更高级胺的存在下进行,并且所述反应混合物被配制成具有由包含胺的链长度和胺基数的方程定义的SiO 2 / Al 2 O 3摩尔比 以及具有一定摩尔比的H 2 O /胺和胺/ Al 2 O 3,以及这些沸石作为用于将醇和/或二烷基醚转化为烯烃和/或芳族化合物的催化剂的用途。
摘要:
A process for the preparation of zeolites of the ZSM-5 structural type from a mixture of SiO.sub.2 and Al(OH).sub.3 by hydrothermal crystallization in an aqueous amine solution, in the absence of alkali, at from 100.degree. to 200.degree. C., wherein the crystallization is carried out in the presence of a triamine, tetraamine and/or higher amine and the reaction mixture is formulated to have an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio defined by an equation which involves the chain length and number of amine groups of the amine employed, as well as to have certain molar ratios of H.sub.2 O/amine and amine/Al.sub.2 O.sub.3, and the use of these zeolites as catalysts for the conversion of alcohols and/or dialkyl ethers to olefins and/or aromatics
摘要翻译:在不存在碱的情况下,在100〜200℃下,通过在胺水溶液中水热结晶,从SiO 2和Al(OH)3的混合物中制备ZSM-5结构型沸石的方法, 其中所述结晶在三胺,四胺和/或更高级胺的存在下进行,并且所述反应混合物被配制成具有由包含胺的链长度和胺基数的方程定义的SiO 2 / Al 2 O 3摩尔比 并且具有一定摩尔比的H 2 O /胺和胺/ Al 2 O 3
摘要:
Crystalline isotactic zeolites having the composition2/.pi.R.multidot.W.sub.2 O.sub.3 .multidot.m YO.sub.2 .multidot.p H.sub.2 Owhere R is an organic amine and n is the number of amine groups in the amine molecule, W is one or more of the elements B, Al, Ga and Fe and Y is Si and/or Ge, and a process for the preparation of these crystalline isotactic metal silicate zeolites from mixtures of YO.sub.2 and W(OH).sub.3 by hydrothermal crystallization at from 100.degree. to 200.degree. C. with the aid of an organic amine, in the absence of an alkali metal base, alkaline earth metal base or quaternary nitrogen base or their intermediates, the number m depending on the chain length of the organic amine used in the crystallization.
摘要翻译:具有组成2 / pi RxW2O3xm YO2xpH2O的结晶全同立构沸石,其中R是有机胺,n是胺分子中的胺基数,W是元素B,Al,Ga和Fe中的一种或多种,Y是Si 和/或Ge,以及通过在100℃至200℃下借助于有机胺通过水热结晶从YO 2和W(OH)3的混合物制备这些结晶全同立构金属硅酸盐沸石的方法, 不存在碱金属碱,碱土金属碱或季氮碱或其中间体,其数量取决于用于结晶的有机胺的链长。
摘要:
A process for the preparation of a crystalline aluminosilicate of the pentasil type by hydrothermal crystallization of SiO.sub.2 and Al(OH).sub.3 in the presence of an alkali metal salt at from 80.degree. to 250.degree. C., wherein the crystallization is carried out in ether or aqueous ether. Particularly suitable solvents include the ethers from the group of the poly-(ethylene glycol) dimethyl ethers and mixtures of these ethers with water. The use of these crystalline aluminosilicates as catalysts for alkylating aromatics, and for preparing olefins and/or aromatics from methanol and/or dimethyl ether is also described.
摘要:
A process for the preparation of methanol by reacting a gaseous mixture of carbon monoxide, carbon dioxide and hydrogen at an elevated temperature and under superatmospheric pressure over a catalyst which contains zinc, copper and aluminum, the catalyst being prepared from a co-crystalline material of the formulaCu.sub.2.2 Zn.sub.2.8 (OH).sub.6 (CO.sub.3).sub.2,containing aluminum hydroxide as a structual promoter, by calcination and reduction at from 160.degree. to 350.degree. C. The novel catalyst has the advantage of giving a substantially increased space-time yield and having a longer life.
摘要:
Amorphous metal/magnesium silicates of the general formulaM.sub.x Mg.sub.y (SiO.sub.2).nH.sub.2 O.where M is a divalent, reducible metal atom from the group consisting of Cu, FeII, Co and Ni, x and y are numbers which together can add up to a value of 1.5 and n after drying, expressed in % by weight, ranges from 0 to 80 are prepared by subjecting a freshly precipitated magnesium silicate to an ion exchange, washing the product and then neutralizing it with an alkali and are used in catalytic reactions after the reducible metal in the metal/magnesium silicates has been converted into the metallic state with a reducing gas.
摘要:
A process for the manufacture of a bifunctional catalyst for the conversion of hydrocarbons, which contains a crystalline aluminosilicate of the type of the Y-zeolites as the acidic component and a noble metal as the hydrogenation component. The process constitutes a technologically simple way of manufacturing bifunctional zeolite catalysts which have at least the same activity and the same life as the catalysts manufactured by conventional methods, coupled with great heat stability and exhibit activity in the presence of H.sub.2 O, H.sub.2 S and NH.sub.3 at relatively high temperatures.