US 11,180,431 B2 · Fluidized bed device and method for preparing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene

Abstract

A turbulent fluidized bed reactor, device and method for preparing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene, resolving or improving the competition problem between an MTO reaction and an alkylation reaction during the process of producing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene, and achieving a synergistic effect between the MTO reaction and the alkylation reaction. By controlling the mass transfer and reaction, competition between the MTO reaction and the alkylation reaction is coordinated and optimized to facilitate a synergistic effect of the two reactions, so that the conversion rate of toluene, the yield of para-xylene, and the selectivity of light olefins are increased. The turbulent fluidized bed reactor includes a first reactor feed distributor and a number of second reactor feed distributors and are arranged sequentially along the gas flow direction.

Claims19

Dependent claims

A turbulent fluidized bed reactor for preparing para-xylene and coproducing light olefins from methanol and/or dimethyl ether and toluene, the turbulent fluidized bed reactor comprising:

a reaction zone, a dilute phase zone, a first reactor feed distributor and a plurality of second reactor feed distributors, the first reactor feed distributor and the plurality of second reactor feed distributors are sequentially arranged from bottom to top in the reaction zone;
wherein the reaction zone is located in a lower part of the turbulent fluidized bed reactor, and the dilute phase zone is located in an upper part of the turbulent fluidized bed reactor;
a material stream A to the first reactor feed distributor comprises toluene and a portion of methanol and/or dimethyl ether;
a material stream B to the plurality of second reactor feed distributors comprises methanol and/or dimethyl ether;
and
the number of the second reactor feed distributors is in a range from 2 to 10;
the turbulent fluidized bed reactor further comprises a perforated plate, the perforated plate is located between the first reactor feed distributor and the second reactor feed distributor closest to the first reactor feed distributor, a porosity of the perforated plate is in a range from 5% to 50%;
and
a horizontal height of opening of a reactor stripper in a reactor shell is higher than that of the first reactor feed distributor and higher than that of the perforated plate.

6 more elements

A device for preparing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene, wherein the device comprises a fluidized bed regenerator for regenerating a catalyst, and a turbulent fluidized bed reactor comprising:

a reaction zone, a dilute phase zone, a first reactor feed distributor and a plurality of second reactor feed distributors, the first reactor feed distributor and the plurality of second reactor feed distributors are sequentially arranged from bottom to top in the reaction zone;
wherein the reaction zone is located in a lower part of the turbulent fluidized bed reactor, and the dilute phase zone is located in an upper part of the turbulent fluidized bed reactor;
a material stream A to the first reactor feed distributor comprises toluene and a portion of methanol and/or dimethyl ether;
a material stream B to the plurality of second reactor feed distributors comprise methanol and/or dimethyl ether;
and
the number of the second reactor feed distributors is in a range from 2 to 10;
the turbulent fluidized bed reactor further comprises a perforated plate, the perforated plate is located between the first reactor feed distributor and the second reactor feed distributor closest to the first reactor feed distributor, a porosity of the perforated plate is in a range from 5% to 50%;
and
a horizontal height of opening of a reactor stripper in a reactor shell is higher than that of the first reactor feed distributor and higher than that of the perforated plate.

6 more elements

A method for preparing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene, wherein the method comprises using a turbulent fluidized bed reactor comprising a reaction zone, a dilute phase, a first reactor feed distributor and a plurality of second reactor feed distributors, the first reactor feed distributor and the plurality of second reactor feed distributors are sequentially arranged from bottom to top in the reaction zone;

wherein the reaction zone is located in a lower part of the turbulent fluidized bed reactor, and the dilute phase zone is located in an upper part of the turbulent fluidized bed reactor;
a material stream A to the first reactor feed distributor comprises toluene and a portion of methanol and/or dimethyl ether;
a material stream B to the plurality of second reactor feed distributors comprise methanol and/or dimethyl ether;
and
the number of the second reactor feed distributors is in a range from 2 to 10;
the turbulent fluidized bed reactor further comprises a perforated plate, the perforated plate is located between the first reactor feed distributor and the second reactor feed distributor closest to the first reactor feed distributor, a porosity of the perforated plate is in a range from 5% to 50%;
and
a horizontal height of opening of a reactor stripper in a reactor shell is higher than that of the first reactor feed distributor and higher than that of the perforated plate.

5 more elements

Dependencies are inferred from the claim text.

Fluidized bed device and method for preparing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene

Life of this patent

Fluidized bed device and method for preparing para-xylene and co-producing light olefins from methanol and/or dimethyl ether and toluene

Life of this patent

Abstract

Claims19