摘要:
A method for preparing novel zeolitic catalyst compositions having a high Si/Al ratio and a crystallinity of at least about 70%. The method involves cation exchanging an as synthesized faujasite material having an Si/Al greater than about 4 with a component selected from the group consisting of ammonium ions and mineral acids, then steam calcining said cation exchanged faujasite in a single steam calcination step at a temperature from about 900.degree. F. to about 1 500.degree. F.
摘要:
The present invention provides a method for the synthesis of MeAPO molecular sieves which includes the following steps: providing a source of alumina, a source of phosphorus, water, and a template suitable for forming a MeAPO molecular sieve; providing a source of metal (Me) including metal particles, the metal particles measuring, in their largest dimension, equal to or less than five nanometers; providing a water soluble organic solvent capable of solubilizing the source of metal; forming a synthesis mixture from the source of alumina, the source of phosphorus, the water, the template, the source of metal, and the solvent; and forming a MeAPO molecular sieve from the synthesis mixture.
摘要:
The present invention relates to a gallo-aluminosilicate zeolite designated as ECR-10 which contains cesium. It also relates to a process for preparation of the zeolite. It may be employed in absorbent or separation applications, particularly in separation of small molecules.
摘要:
This invention relates to novel zeolitic compositions having one or more transition metals as well as aluminum and silicon in the framework tetrahedral positions. The composition has a mazzite-like structure. The invention also involves a process of preparation in which at least one divalent transition metal is directly synthesized into the product.
摘要:
This invention relates to novel zeolitic compositions having transition metals as well as aluminum and silicon in the framework tetrahedral positions. The composition has a structure similar to mazzite type zeolites. The invention also involves a process of preparation in which at least one transition metal is directly synthesized into the product.
摘要:
A synthetic crystalline zeolite is provided characterized by having a composition, in terms of mole ratios of oxides, in the range:0.1 to 0.02 R.sub.2 O:0.90 to 0.98 Na.sub.2 O:Al.sub.2 O.sub.3 :5 to 20 SiO.sub.2 :0 to 8 H.sub.2 Owherein R represents a bis-(2-hydroxyethyl) dimethylammonium group, and characterized by having atoms arranged in a structure as indicated by a specified x-ray powder diffraction pattern. The zeolite may be prepared by crystallization from an aged reaction mixture of an oxide of sodium, a bis-(2-hydroxyethyl) dimethylammonium salt, water, a source of silica, a source of alumina, and sodium aluminosilicate nucleating seeds in specified relative amounts.
摘要翻译:提供合成结晶沸石,其特征在于以氧化物的摩尔比计,其组成范围为0.1至0.02R 2 O:0.90至0.98 Na 2 O:Al 2 O 3:5至20 SiO 2:0至8 H 2 O,其中R表示双 - (2-羟乙基)二甲基铵基,其特征在于具有按照规定的x射线粉末衍射图所示的结构排列的原子。 沸石可以通过将钠,二 - (2-羟乙基)二甲基铵盐,水,二氧化硅源,氧化铝源和硅铝酸钠成核种子的氧化物的老化反应混合物以规定的相对量 。
摘要:
Disclosed are silicoaluminates (SAPOs) having unique silicon distributions, a method for their preparation and their use as naphtha cracking catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution.
摘要:
Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions and their preparation. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from single phase synthesis solutions, or from microemulsions containing surfactants.
摘要:
Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions and high catalytic cracking activity, a method for their preparation and their use as FCC catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution. The new SAPOs may have a small crystal size and may be synthesized from a single- phase synthesis solution.