摘要:
L'invention concerne un catalyseur renfermant un solide à base d'une zéolithe ou d'une silice de structure MFI, ce solide ayant été fluoré en cours de synthèse, le catalyseur renfermant en outre une matrice et un métal hydrogénant. Le catalyseur dont un spectre de vibration infrarouge est représenté sur la figure 3, est utilisé en particulier pour améliorer la tenue au froid d'un gas-oil.
摘要:
Process for producing bases by condensing an aliphatic aldehyde and/or ketone with ammonia in gas phase in the presence of a catalyst, characterized by using a catalyst which is obtained by modifying a zeolite having a proportion of Si to Al, Fe and/or Ga of about 12 to about 1,000 and a constraint index of about 0.8 to about 12 with at least one metal ion or metal compound, the metal being selected from the group consisting of thallium, lead and cobalt.
摘要:
Process for converting synthesis gas in naphta by contacting it at 260-315,55 °C and 446,07-6996,09 kPa and at a GHSV of 400-20000 with a catalyst comprising a crystalline acidic aluminosilicate (ZSM-5) having a silica to alumina ratio of at least 12, a pore size greater than 5Å and a constraint index of 1 to 12, a soliceous matrix and iron; this catalyst is prepared by adding the zeolite to a siliceous hydrogel, homogenizing and spray drying the mixture and impregnating it with an iron salt (e.g. the nitrate). The catalyst may contain clay.
摘要:
Improved yield in light olefins and aromatics from methanol conversion on Zn and Mn loaded pentasil zeolite and composite pentasil zeolite-asbestos catalysts, the Zn content thereof ranging from 0.1 to 1.0% wt/wt and the Mn content thereof ranging from 0.2 to 5.0% wt/wt. The light olefins/aromatics ratio in the products varies with the Mn content in the catalyst, the cumulative light olefinic and aromatic production being kept constant at a high value (higher than 80% at 450°C).
摘要:
A catalytic process for hydrocracking C 5 + paraffin stream. The catalyst comprises a hydrogenation function such as palladium and a Group IIA form e.g. Be Mg, or IIIB, form e.g. Sc, Y, of zeolite ZSM-20. In an optional further step the paraffin stream is thermally cracked to recover ethylene and propylene.