摘要:
A composition for controlling NOx emissions during FCC processes comprises (i) an acidic oxide support, (ii) cerium oxide, (iii) a lanthanide oxide other than ceria such as praseodymium oxide, and (iv), optionally, an oxide of a metal from Groups Ib and IIb such as copper, silver and zinc.
摘要:
Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the catalytic cracking of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from microemulsions containing surfactants.
摘要:
A microporous crystalline material of a zeolitic nature, that corresponds to the empirical formulax(M1/nXO2):yYO2:zGeO2:(1nullz)TO2wherein x has a value between 0 and 0.2; y has a value between 0 and 0.1; z has a value between 0 and 0.67; being at least one of the z, x and y above zero; M is selected between Hnull and inorganic cations with a nulln charge; X is at least one chemical element with a null3 oxidation status; Y is at least one chemical element with a null4 oxidation status; and T is at least one chemical element with a null4 oxidation status; and is also characterised by its X-ray diffraction pattern and its microporous properties, and can be employed as a catalyst or oxidating agent in the separation and transformation of organic compounds.
摘要:
Mesoporous hexagonal, cubic or wormhole aluminosilicates derived from zeolite seeds using an ionic structure directing agent are described. The aluminum in the structures is stable so that the framework of the structures does not collapse when heated in the presence of water or water vapor (steam). The steam stable aluminosilicates can be used as acid catalysts for hydrocarbon conversions, including the fluidized bed catalytic cracking and the hydrocracking of petroleum oils, and other cracking of organic compounds.
摘要:
The present invention is directed to certain catalyst compositions and processes that are capable of reducing sulfur compounds normally found as part of the gasoline fraction streams of fluid catalytic cracking processes. The present invention requires an equilibrium cracking catalyst composition comprises at least one Y-type zeolite having kinetic conversion activity of at least about 3 in combination with a Lewis acid containing alumina composite present in at least 50 weight percent of the composition. The resultant equilibrium catalyst composition has a kinetic conversion activity of at least about 2.
摘要:
A fluid catalytic cracking catalyst made from microspheres that initially contain kaolin, a dispersible boehmite alumina and a sodium silicate or silica sol binder. The kaolin portion contains hydrous kaolin and a particular kaolin which has been calcined through its characteristic exotherm and which produces a catalyst having a novel morphology comprising a macroporous matrix and crystallized zeolite freely coating the walls of the pores of the matrix. Calcination of the hydrous kaolin to metakaolin and formation of in-situ zeolite by treatment with sodium silicate yields a catalyst containing Y-faujasite and transforms the dispersible boehmite into a transitional alumina. The catalyst can be used to crack resid or resid-containing feeds as the alumina phase formed from the dispersible boehmite passivates nickel and vanadium contaminants.
摘要:
A process for cracking an olefin-containing hydrocarbon feedstock which is selective towards light olefins in the effluent, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a reactor containing a crystalline silicate selected from an MFI-type crystalline silicate having a silicon/aluminium atomic ratio of at least 180 and an MEL-type crystalline silicate having a silicon/aluminium atomic ratio of from 150 to 800 which has been subjected to a steaming step, at an inlet temperature of from 500 to 600null C., at an olefin partial pressure of from 0.1 to 2 bars and the feedstock being passed over the catalyst at an LHSV of from 5 to 30hnull1 to produce an effluent with an olefin content of lower molecular weight than that of the feedstock, wherein the olefin-containing hydrocarbon feedstock includes a C5-containing overhead cut from a first fractionator which has been fed with a C5null hydrocarbon feedstock, the-bottom fraction from the first fractionator being a C6null cut and the C5null hydrocarbon feedstock comprises a bottom fraction from a second fractionator which has been fed with a feedstock having at least C4null hydrocarbons, and the overhead from the second fractionator comprises a C4 containing cut, optionally further containing C3 hydrocarbons.
摘要:
The present invention relates to non-noble metal combustion catalyst for carbon monoxide comprising CunullAl/CenullAl complex oxides and aluminum oxide support. The catalysts comprise CenullAl complex oxide and CunullAl complex oxide successively loaded on the aluminum oxide support, wherein the loading weight ratio is 0.02-0.10 for CenullAlnullO/Al2O3 and 0.05-0.15 for CunullAlnullO/Al2O3, and the CunullAl complex oxide is dispersed in cluster form on the surface of the aluminum oxide support pre-covered with high dispersed nanoparticles of the CenullAl complex oxide. Furthermore, the present invention relates to a process for preparing the catalysts and their use as combustion promoter with high catalytic activity, high hydrothermal stability and ability of reducing NOx exhaust in the fluid catalytic cracking (FCC) process of petroleum refining.
摘要翻译:本发明涉及一种包含Cu-Al / Ce-Al复合氧化物和氧化铝载体的一氧化碳非贵金属燃烧催化剂。 催化剂包含依次负载在氧化铝载体上的Ce-Al复合氧化物和Cu-Al复合氧化物,其中Ce-Al-O / Al2O3的负载重量比为0.02-0.10,Cu-Al-O / Al 2 O 3,并且Cu-Al复合氧化物以簇状分散在预先覆盖有Ce-Al复合氧化物的高分散纳米颗粒的氧化铝载体的表面上。 此外,本发明涉及一种制备催化剂的方法及其用作具有高催化活性,高水热稳定性和在石油精炼的流化催化裂化(FCC))方法中还原NOx排放的能力的助燃剂。
摘要:
The present invention relates to new crystalline zeolite SSZ-54 prepared using a templating agent comprising N-isopropyl ethylenediamine, or a mixture of 1-N-isopropyl diethylenetriamine and isobutylamine, and processes employing SSZ-54 in a catalyst.
摘要:
The sulfur content of liquid cracking products, especially the cracked gasoline, of the catalytic cracking process is reduced by the use of a sulfur reduction catalyst composition comprising a porous molecular sieve which contains a metal in an oxidation state above zero within the interior of the pore structure of the sieve as well as a cerium component which enhances the stability and sulfur reduction activity of the catalyst. The molecular sieve is normally a faujasite such as USY. The primary sulfur reduction component is normally a metal of Period 3 of the Periodic Table, preferably vanadium. The sulfur reduction catalyst may be used in the form of a separate particle additive or as a component of an integrated cracking/sulfur reduction catalyst.