摘要:
A process for producing at least one light olefin comprising: (a) contacting a first raw material comprising methanol with a least one catalyst in a first reaction zone to produce at least one light olefin and at least one inactivated catalyst; (b) transporting the at least one inactivated catalyst to a first regeneration zone to produce at least one first regenerated catalyst, and transporting a portion of the at least one first regenerated catalyst to the first reaction zone; (c) transporting another portion of the at least one first regenerated catalyst to a second regeneration zone to obtain at least one second regenerated catalyst; and (d) transporting the at least one second regenerated catalyst to a second reaction zone, and contacting the at least one second regenerated catalyst with a second raw material comprising C4 olefins to produce a product stream II comprising at least one light olefin.
摘要:
A process for producing at least one light olefin comprising: (a) contacting a first raw material comprising methanol with a least one catalyst comprising at least one silicon-aluminophosphate molecular sieve in a first reaction zone to produce a product stream I comprising at least one light olefin and at least one inactivated catalyst; (b) transporting the at least one inactivated catalyst to a first regeneration zone to produce at least one first regenerated catalyst, and transporting a portion of the at least one first regenerated catalyst to the first reaction zone, wherein the at least one first regenerated catalyst comprises a carbon deposit present in an amount ranging from about 0.8% to about 2.5% by weight relative to the total weight of the at least one first regenerated catalyst; (c) transporting another portion of the at least one first regenerated catalyst to a second regeneration zone to obtain at least one second regenerated catalyst, wherein the at least one second regenerated catalyst comprises a carbon deposit present in amount of less than about 0.2% by weight relative to the total weight of the at least one second regenerated catalyst; and (d) transporting the at least one second regenerated catalyst to a second reaction zone, and contacting the at least one second regenerated catalyst with a second raw material comprising C4 olefins to produce a product stream II comprising at least one light olefin.
摘要:
Hydrocarbons are converted by contacting them at hydrocarbon conversion conditions with a catalyst composite comprising a silica polymorph consisting of crystalline silica, said silica polymorph after calcination in air at 600.degree. C. for one hour, having a mean refractive index of 1.39.+-.0.01 and a specific gravity at 25.degree. C. of 1.70.+-.0.05 g/cc and a refractory inorganic oxide.
摘要:
HYDROCARBON COMPOUNDS CAN BE DEMETHYLATED IN THE PRESENCE OF HYDROGEN AND A NOVEL SOLID, REDUCED BIMETALLIC CATALYST PREPARED BY REACTING DIMETHYL OR TRIMETHYL ALUMINUM DERIVATIVES WITH COMPOUNDS OF IRON, COBALT, OR NICKEL. THE REACTION MAY BE UTILIZED TO REMOVE ONE OR MORE METHYL OR METHYLENE GROUPS FROM ALIPHATIC, ALKYL AROMATIC OR ALICYCLIC COMPOUNDS, THEREBY REDUCING THE CARBON NUMBER OF SUCH COMPOUNDS. IN A PREFERRED EMBODIMENT THE REACTION TAKES PLACE AT A REDUCED TEMPERATURE.
摘要:
Catalysts of certain combinations of platinum, tin, acidic molecular sieve and aluminum phosphate binder achieve the isomerization and dealkylation activities characteristic of platinum-containing catalysts yet enjoy the low net C6 naphthenes make properties.