Petroleo Brasileiro S.a. - Petrobras

Other

Lam Yiu Lau

Andrea De Rezende Pinho

Raquel Bastiani

Claudia Maria De Lacerda Alvarenga Baptista

Alexandre De Figueiredo Costa

Marlon Brando Bezerra De Almeida

Ivanilda Barboza Do Espirito Santo

Eliane Bernad Castro Mattos

Aline Barbosa Junqueira De Souza

Joao Eduardo Cerutti Karam

Ricardo Drolhe Montaury Pimenta

Marcelo Maciel Pereira

Rodolfo Eugênio Roncolatto

Rosana Wasserman

Janaina Gorne

Eliane Bernadete Castro Mattos

Claudia Maria Lacerda Alvarenga Baptista

Sergio Augusto Santos Rodrigues

Additives for mixing into the base catalyst inventory of the fluid catalytic cracking (FCC) process units, so as to achieve a high selectivity of light olefins (ethylene and propylene), are described. Such additives comprise an FER zeolite and an MFI zeolite, the MFI zeolite preferably being zeolite ZSM-5. The mixture of the additive in a concentration greater than 2% w/w relative to the base catalyst of an FCC unit allows greater selectivity for light olefins, propylene and ethylene, while maintaining catalytic activity.

Additives for maximizing light olefins in fluid catalytic cracking and process units

A process is described for maximization of light olefins, preferably ethylene, by the catalytic cracking of feeds of saturated hydrocarbons, with molecular size in the range from 4 to 6 carbon atoms. The process uses a catalyst based on a zeolite of type ZSM-5 with low sodium content and modified with nickel, with concentration by weight of nickel, expressed in the form of oxide, in the range from 0.1% to 20% relative to the weight of zeolite in the catalyst, and operating conditions that involve a temperature between 400&#xb0; C. and 650&#xb0; C. and feed partial pressure between 0.1 and 1.0 MPa, so that the product recovered is rich in light olefins, with ethylene/propylene ratio in the range from 0.25 to 2.00.

Catalytic cracking process of a stream of hydrocarbons for maximization of light olefins

A process for the preparation and modification of additives, with a zeolite base and a high silica alumina ratio (SAR) like the ZSM-5, to increase the yield of propene and LPG in low severity FCC operations, that seeks to maximize the production of medium-distillates with low aromaticity and to minimize molecular cracking in the LCO range. The additives involved guarantee an increase in light olefin yields without altering the yield or the quality of the LCO produced. The innovative process includes surprising actions from rare earths (RE) on the active sites of zeolite, that at once partially block their pores and, in this way, make molecular cracking in the medium-distillate range difficult, which preferably occur at low reaction temperatures and keeps the remaining sites quite active. These sites are sufficiently active to crack smaller molecules in the gasoline range, guaranteeing an overall increase in light olefins and allowing the additive involved to be used industrially in operations to maximize medium-distillates in an FCC unit. This new additive may be obtained by modifying any commercial ZSM-5 zeolite additive.

Additive to maximize GLP and propene suitable for use in low-severity operations of a fluid catalytic cracking unit and its preparatory process

A multifunctional additive for maximizing yield of light olefins and LPG, with a tolerance to contaminant metals. Maximization of the referenced properties is accomplished through the use of a zeolite treated with a phosphorus source, calcined and impregnated with a rare earth salt. The process for preparation of the referenced catalyst includes the following steps: preparation of a precursor containing a zeolite that is selective of olefins with a source of phosphorus; placement of a source of phosphorus in this precursor through calcination; deposition of rare earth salts on the surface of the additive for maximizing the yield of light olefins and LPG that forms; and drying the multifunctional additive formed.

Multifunctional additive for maximizing properties relevant to the process of fluid catalytic cracking and the process for preparation thereof

Growing community of inventors

Rio de Janeiro, Brazil

Lam Yiu Lau