摘要:
Process for the preparation of an additive-containing anionic clay comprising the steps of (a) milling a physical mixture of a divalent metal compound and a trivalent metal compound, (b) calcining the physical mixture at a temperature in the range 200-800° C., and (c) rehydrating the calcined mixture in aqueous suspension, wherein an additive is present in the physical mixture and/or the aqueous suspension of step (c). With this process additive-containing anionic clays with a homogeneous additive distribution can be prepared.
摘要:
The present invention is directed to a process for the preparation of a doped anionic clay. In said process a trivalent metal source is reacted with a divalent metal source, at least one of the metal sources being either doped boehmite, doped MgO or doped brucite, to obtain a doped anionic clay. Suitable dopants are compounds containing elements selected from the group of alkaline earth metals (for instance Ca and Ba), alkaline metals, transition metals (for example Co, Mn, Fe, Ti, Zr, Cu, Ni, Zn, Mo, W, V, Sn), actinides, rare earth metals such as La, Ce, and Nd, noble metals such as Pt and Pd, silicon, gallium, boron, titanium, and phosphorus.
摘要:
Process for the preparation of a metal-containing composition, which process comprises the steps of (a) calcining a physical mixture of an anionic clay and a metal additive at a temperature between 200 and 800° C., and (b) rehydrating the calcined product of step a). This process allows the use of insoluble metal additives. It does not require the use of soluble metal additives, which has economic and environmental advantages.
摘要:
A Ccomposition comprising one or more metal hydroxy salts and a matrix, binder or carrier material, wherein the metal hydroxy salt is a compound comprising (a) as metal either (i) one or more divalent metals, at least one of them being selected from the group consisting of Ni, Co, Ca, Zn, Mg, Fe, and Mn, or (ii) one or more trivalent metal(s), (b) framework hydroxide, and (c) a replaceable anion. This composition has various catalytic applications.
摘要:
Novel compositions of matter comprising a cationic layered material and a second compound. The second compound has a reflection in its XRD pattern at 18.5 degrees two-theta, and s second reflection at 29 degrees two-theta. The composition of matter may be used in hydrocarbon conversion, purification, and synthesis processes, such as fluid catalytic cracking and hydroprocessing. The materials are especially suitable for the reduction of SOx and NOx emissions and the reduction of the sulfur and nitrogen content in fuels like gasoline and diesel.
摘要:
The present invention pertains to a quasi-crystalline boehmite containing additive in a homogeneously dispersed state. Suitable additives are compounds containing elements selected from the group of alkaline earth metals, alkaline metals, rare earth metals, transition metals, actinides, silicon, gallium, boron, titanium, and phosphorus. Said QCBs according to the invention may be prepared in several ways. In general, a quasi-crystalline boehmite precursor and an additive are converted to a quasi-crystalline boehmite containing the additive in a homogeneously dispersed state.
摘要:
Cationic layered materials, a process for their preparation and their use in hydrocarbon conversion, purification, and synthesis processes, such as fluid catalytic cracking. Cationic layered materials are especially suitable for the reduction of SOx and NOx emissions and the reduction of the sulfur and nitrogen content in fuels like gasoline and diesel. The new preparation process avoids the use of metal salts and does not require the formation of anionic clay as an intermediate.
摘要:
The present invention is directed to a process for the preparation of crystalline anionic clay-containing bodies from sources comprising a trivalent metal source and a divalent metal source comprising the steps of: a) preparing a precursor mixture containing a liquid, a divalent metal source and/or a trivalent metal source, at least one of them being insoluble in the liquid; b) shaping the precursor mixture to obtain shaped bodies; c) optionally thermally treating the shaped bodies; and d) aging the shaped bodies to obtain crystalline anionic clay-containing bodies; with the proviso that if no divalent or trivalent metal source is present in the precursor mixture of step a), such source is added to the shaped bodies after shaping step b) and before aging step d); and with the further proviso that the combined use of an aluminium source as the trivalent metal source and a magnesium source as the divalent metal source is excluded. The quintessence of the present invention is that the major part of the final amount of anionic clay is formed after shaping, i.e., in situ in the shaped body. This results in attrition resistant bodies, without the need to add a binder material.
摘要:
The present invention pertains to cheaper process for the preparation of quasi-crystalline boehmite containing additive in a homogeneously dispersed state. In this cheaper process an inexpensive quasi-crystalline boehmite precursor is and additive are combined and aged to form a quasi-crystalline boehmite containing additive in a homogeneously dispersed state. Suitable inexpensive quasi-crystalline boehmite precursors are aluminum trihydrate and thermally treated forms thereof and inorganic aluminum salts. Suitable additives are compounds containing elements selected from the group of rare earth metals alkaline earth metals, transition metals, actinides, silicon, gallium, boron, and phosphorus.
摘要:
Oxidic composition consisting essentially of oxidic forms of a first metal, a second metal, and optionally a third metal, the first metal being either Ca or Ba and being present in the composition in an amount of from about 5 to about 80 wt %, the second metal being Al and being present in the composition in an amount of from about 5 to about 80 wt %, the third metal being selected from the group consisting of La, Ti, and Zr, and being present in an amount of from 0 to about 17 wt %—all weight percentages calculated as oxides and based on the weight of the oxidic composition, the oxidic composition being obtainable by(a) preparing a physical mixture comprising solid compounds of the first, the second, and the optional third metal, (b) optionally aging the physical mixture, without anionic clay being formed, and (c) calcining the mixture.This composition is suitable for use in FCC processes for the passivation of metals with only minimal influence on the zeolite's hydrothermal stability.