A process for dewaxing waxy hydrocarbonaceous materials, such as hydrocarbon fuel and lubricating oil fractions to reduce their cloud and pour points comprises reacting the material with hydrogen in the presence of a dewaxing catalyst comprising at least one metal catalytic component and ferrierite in which at least a portion of its cation exchange positions are occupied by one or more trivalent rare earth metal cations. The rare earth ion exchanged ferrierite catalyst has good selectivity for lubricating oil production, particularly when dewaxing a Fischer-Tropsch wax hydroisomerate. Preferably at least 10 % and more preferably at least 15 % of the ferrierite cation exchange capacity is occupied by one or more trivalent rare earth metal cations.

Catalytic dewaxing with trivalent rare earth metal ion exchanged ferrierite

A catalyst for catalytic pyrolysis process for the production of light olefins comprises 10˜70 wt % (based on the weight of catalyst) of clay, 5˜85 wt % of inorganic oxides and 1-50 wt % zeolite, wherein said zeolite is a mixture of 0˜25 wt % of Y type zeolite and 75˜100 wt % of phosphorus and aluminum or phosphorus and magnesium or phosphorus and calcium containing high silica zeolite having a structure of pentasil; said pentasil high silica zeolite being one selected from the group consisting of ZSM-5, ZSM-8 and ZSM-11 of zeolites containing 2˜8 wt % of phosphorus and 0.3˜3 wt % of aluminum or magnesium or calcium (calculated as the oxides), having a silica/alumina mole ratio of 15-60. The catalyst exhibits excellent activity stability and high yields of light olefin, especially for C 2 = . It can at the same level of yields of light olefins as that of steam thermal cracking at a lower reaction temperature than that of steam thermal cracking.

Catalyst for catalytic pyrolysis process for the production of light olefins and the preparation thereof

The present invention relates to new crystalline molecular sieve SSZ-75 prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent, and its use in catalysts for hydrocarbon conversion reactions.

Hydrocarbon conversion using molecular sieve SSZ-75

A hydrocarbon feed containing C4-C7 olefins and/or paraffins is converted to light olefins, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, having an initial silica to alumina ratio greater than about 300:1, and phosphorus.

Catalytic production of light olefins rich in propylene

The present invention is directed to a catalyst composition for FCC which has high efficiency in the production of light olefins while maintaining the bottoms conversion. Said catalyst composition is prepared by: a) ex situ activating an olefin-selective zeolite with at least 10 wt% of a phosphorus-containing compound, calculated as P2O5 based on the total amount of olefin-selective zeolite; b) combining the activated olefin-selective zeolite with 10-40 wt% catalytic cracking component, binder, and 0-25 wt% silica in a slurry, so that the total amount of amorphous alumina present in the final catalyst composition is at least 10 wt%, and c) spray-drying the slurry to form catalyst particles.

Catalyst composition with high efficiency for the production of light olefins

A cracking catalyst for the production of light olefins comprises 0-70% (based on the weight of the catalyst) of clay, 5-99% of inorganic oxides, and 1-50% of zeolite. The zeolite in the catalyst is a mixture of 0-25 wt % of REY or high silica Y zeolite and 75-100 wt % of phosphorus and rare earth containing high silica zeolite having a structure of pentasil. The catalyst exhibits higher hydrothermal activity-stability, conversion level, and C2 -C4 olefin yields in cracking reaction, comparing with the catalyst using HZSM-5 zeolite as active component.

Cracking catalyst for the production of light olefins

The present invention discloses a rare earth-containing high-silica zeolite having penta-sil type structure and process for the same. The anhydrous composition of the high-silica zeolite of the present invention (based on the mole ratio of oxides) can be defined by the formula xRE.sub.2 O.sub.3 yNa.sub.2 OAl.sub.2 O.sub.3 zSiO.sub.2 in which X=0.01-0.30, y=0.4-1.0, and z=20-60. The high-silica zeolite of the present invention is an useful active component for catalysts.

Zhicheng Shi

Papers

Cracking catalyst for the production of light olefins

Rare earth-containing high-silica zeolite having penta-sil type structure and process for the same