摘要:
The present invention discloses a SCM-38 molecular sieve and preparation process and use thereof. The SCM-38 molecular sieve is a phosphorus-aluminium or silicon-phosphorus-aluminium molecular sieve, the SCM-38 molecular sieve shows the following diffraction peak feature in its XRD spectrum: X-ray diffraction peaks appear at 2θ of 7.20±0.1, 10.81±0.1, 11.60±0.1, 14.32±0.1, 21.39±0.1, 21.83±0.1, 27.31±0.1, 28.72±0.1, wherein the most intense peak appears at 2θ of 7.20±0.1. The SCM-38 molecular sieve of the present invention can be used in catalysts.
摘要:
The present invention discloses a SCM-34 molecular sieve, preparation method therefor and use thereof. The SCM-34 molecular sieve comprises aluminum, phosphorus, oxygen and optionally silicon. In the XRD diffraction data of the molecular sieve, a 2θ degree of the strongest peak within the range of 5-50° is 7.59 ± 0.2. The SCM-34 molecular sieve has a new skeleton structure and can be used to prepare a metal-containing AFI type molecular sieve or an SAPO-17 molecular sieve, meeting the different needs for catalysts in the chemical production.
摘要:
A solvothermal synthesis process of the SAPO molecular sieves and catalysts prepared thereby are provided. The synthesis process comprises the following steps: a) an organic amine, an aluminum source, a phosphorus source, a silicon source, and water are mixed in a molar ratio of 6-30 : 1 : 0.5-5 : 0.01-1.0 : 0.1-15, to obtain an initial mixture for preparing the SAPO molecular sieves, wherein the molar ratio of water to the organic amine is less than 2.0; b) the initial mixture obtained in the step a) is maintained at 30-60 °C and aged with stirring for not more than 24 hours, to obtain an initial gel; c) the initial gel obtain in the step b) is crystallized at 150-250 °C for 0.5-15 days. The SAPO molecular sieves prepared thereby are used, after being calcined at 400 - 700 °C in air, as catalysts for acid-catalyzed reactions or for conversion reactions of oxygen-containing compounds to olefins.
摘要:
A method for synthesizing an aluminophosphate based molecular sieve is described. The method may include the steps of: (a) preparing an aqueous mixture comprising water, a substituted hydrocarbon, and a 1-oxa-4-azacyclohexane derivative; (b) reacting the aqueous mixture; (c) obtaining a solution comprising an organo-1-oxa-4-azoniumcyclohexane compound; (d) forming a reaction mixture comprising reactive sources of Al, and P, and the solution; and (e) heating the reaction mixture to form the molecular sieve.
摘要:
A new family of crystalline microporous metallophosphates designated AlPO-57 has been synthesized. These metallophosphates are represented by the empirical formula R + r M m n+ EP x Si y O z where R is an organoammonium cation such as the DEDMA + , M is a divalent framework metal such as an alkaline earth or transition metal, and E is a framework element such as aluminum or gallium. The microporous AlPO-57 compositions are characterized by a new unique ABC-6 net structure and have catalytic properties for carrying out various hydrocarbon conversion processes and separation properties for separating at least one component.
摘要翻译:已经合成了一种称为AlPO-57的结晶微孔金属磷酸盐的新家族。 这些金属磷酸盐由经验式R + rM m n + EP xSi y O z表示,其中R为有机铵阳离子如DEDMA +,M为二价骨架金属如碱土金属或过渡金属,E为骨架 元素如铝或镓。 微孔AlPO-57组合物的特征在于新的独特的ABC-6网状结构,并具有用于进行各种烃转化过程和用于分离至少一种组分的分离性质的催化性质。