摘要:
A catalyst composition comprising at least about 10% by weight pentasil, at least about 12% by weight Y-type zeolite at a pentasil to Y zeolite ratio of at least 0.25, and wherein the pentasil and Y zeolite comprise at least about thirty-five percent of the catalyst have been shown to optimize light olefin yields and LPG from FCC processes. Embodiments having matrix surface areas greater than 25m 2 /g, phosphorous and rare earth are preferred. The compositions of this invention are particularly useful in typical fluid catalytic cracking (FCC) processes.
摘要:
Compositions for reduction of NO x generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeolite, and a particulate NO x reduction composition containing ferricrite zeolite particles. Preferably, the NO x reduction composition contains ferrierite zeolite particles bound with an inorganic binder. In the alternative, the ferrierite zeolite particles are incorporated into the cracking catalyst as an integral component of the catalyst. NO x reduction compositions in accordance with the invention are very effective for the reduction of NO x emissions released from the regenerator of a fluid catalytic cracking unit operating under FCC process conditions without a substantial change in conversion or yield of cracked products. Processes for the use of the compositions are also disclosed.
摘要:
A particulate catalytic cracking catalyst which comprises a zeolite having catalytic cracking ability under catalytic cracking conditions, added silica, precipitated alumina and, optionally clay. The catalytic cracking catalyst has a high matrix surface area and is useful in a catalytic cracking process, in particularly, a fluid catalytic cracking process, to improve bottoms conversion at a constant coke formation.
摘要:
Compositions for reduction of NO X generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition; preferably containing a Y-type zeolite, and a particulate NO X reduction composition containing particles of a zeolite having a pore size ranging from about 3 to about 7.2 Angstoms and a SiO 2 to Al 2 O 3 molar ratio of less than about 500. Preferably, the NO X reduction composition contains NO X reduction zeolite particles bound with an inorganic binder, In the alternative, the NO X reduction zeolite particles are incorporated into the cracking catalyst as an integral component of the catalyst. Compositions in accordance with the invention are very effective for the reduction of NO X emissions released from the regenerator of a fluid catalytic cracking unit operating under FCC process conditions without a substantial change in conversion or yield of cracked products. Processes for the use of the compositions are also disclosed.
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 is a cracking catalyst composition comprising a zeolite in combination with a Lewis Acid containing component, wherein the cracking catalyst composition comprises 0.2% Na2O or less. It has been found that sulfur compounds in hydrocarbon feeds to fluid catalytic cracking processes can be reduced by at least 15% compared to the same composition, which does not comprise the aforementioned Lewis Acid containing component.