Turbulent fluidized-bed reactor, device, and method using oxygen-containing compound for manufacturing propene and C4 hydrocarbon

Patent metadata

Field	Value
Publication number	US-10710940-B2
Application number	US-201616342587-A
Country	US
Kind code	B2
Filing date	Oct 19, 2016
Priority date	Oct 19, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A turbulent fluidized-bed reactor, device and method for preparing propylene and C4 hydrocarbons from oxygen-containing compounds. The device includes the turbulent fluidized-bed reactor and a fluidized-bed regenerator for regenerating a catalyst. The method includes: a) feeding a raw material containing the oxygen-containing compounds from n reactor feed distributors to a reaction zone of the turbulent fluidized-bed reactor, and contacting the raw material with a catalyst, to generate a stream containing target product and a spent catalyst containing carbon; b) sending the stream discharged into a product separation system, obtaining propylene, C4 hydrocarbons, light fractions and the like after separation, returning 70 wt. % or more of the light fractions to the reaction zone of the turbulent fluidized-bed reactor from the reactor feed distributor, and reacting ethylene and the oxygen-containing compounds to perform an alkylation reaction in presence of the catalyst, to produce products of propylene and the like.

First claim

The invention claimed is:

1. A turbulent fluidized-bed reactor for preparing propylene and C4 hydrocarbons from oxygen-containing compounds, comprising:
a reactor shell, one or more reactor feed distributors, a first reactor gas-solid separator, a second reactor gas-solid separator, a reactor heat extractor, a product gas outlet and a reactor stripper, wherein the lower part of the turbulent fluidized-bed reactor is a reaction zone, the upper part of the turbulent fluidized-bed reactor is a settling zone, the one or more reactor feed distributors are disposed in the reaction zone, the reactor heat extractor is disposed in the reaction zone, the first reactor gas-solid separator and the second reactor gas-solid separator are placed in the settling zone or outside the reactor shell, the first reactor gas-solid separator is equipped with a regenerated catalyst inlet, the catalyst outlet of the first reactor gas-solid separator is located at the bottom of the reaction zone, the gas outlet of the first reactor gas-solid separator is located in the settling zone, the inlet of the second reactor gas-solid separator is located in the settling zone, the catalyst outlet of the second reactor gas-solid separator is placed in the reaction zone, the gas outlet of the second reactor gas-solid separator is connected to the product gas outlet, the reactor stripper passes through the reactor shell from outside to inside at the bottom of the turbulent fluidized-bed reactor and is opened in the reaction zone of the turbulent fluidized-bed reactor, a reactor stripping gas inlet is arranged at the bottom of the reactor stripper, and a spent catalyst outlet is arranged at the bottom of the reactor stripper.

2. The turbulent fluidized-bed reactor according to claim 1 , wherein one or more reactor feed distributors are disposed in the reaction zone from bottom to top, and there are between one and ten distributions.

3. The turbulent fluidized-bed reactor according to claim 1 , wherein the horizontal height of opening of the reactor stripper in the reactor shell is higher than 1/10 the height of the reaction zone.

4. The turbulent fluidized-bed reactor according to claim 1 , wherein the first reactor gas-solid separator and the second reactor gas-solid separator are cyclone separators.

5. A device for preparing propylene and C4 hydrocarbons from oxygen-containing compounds, comprising the turbulent fluidized-bed reactor according to claim 1 and a fluidized-bed regenerator for regenerating a catalyst.

6. The device according to claim 5 , wherein the fluidized-bed regenerator is a turbulent fluidized-bed regenerator.

7. The device according to claim 5 , wherein the fluidized-bed regenerator comprises a regenerator shell, a regenerator feed distributor, a regenerator gas-solid separator, a regenerator heat extractor, a flue gas outlet and a regenerator stripper, in which the lower part of the fluidized-bed regenerator is a regeneration zone, the upper part of the fluidized-bed regenerator is a settling zone, the regenerator feed distributor is placed at the bottom of the regeneration zone, the regenerator heat extractor is placed in the regeneration zone, the regenerator gas-solid separator is placed in the settling zone or outside the regenerator shell, the inlet of the regenerator gas-solid separator is disposed in the settling zone, the catalyst outlet of the regenerator gas-solid separator is disposed in the regeneration zone, the gas outlet of the regenerator gas-solid separator is connected to the flue gas outlet, and the regenerator stripper is opened at the bottom of the regenerator shell;
the spent catalyst outlet of the reactor stripper is connected to the inlet of a inclined spent catalyst pipe, a spent catalyst sliding valve is arranged in the inclined spent catalyst pipe, the outlet of the inclined spent catalyst pipe is connected to the inlet of a spent catalyst lift pipe, the bottom of the spent catalyst lift pipe is provided with a spent catalyst lifting gas inlet, and the outlet of the spent catalyst lift pipe is connected to the settling zone of the fluidized-bed regenerator; and
the bottom of the regenerator stripper is provided with a regenerator stripping gas inlet, the bottom of the regenerator stripper is connected to the inlet of a inclined regenerated catalyst pipe, a regenerated catalyst sliding valve is arranged in the inclined regenerated catalyst pipe, the outlet of the inclined regenerated catalyst pipe is connected to the inlet of a regenerated catalyst lift pipe, the bottom of the regenerated catalyst lift pipe is provided with a regenerated catalyst lifting gas inlet, and the outlet of the regenerated catalyst lift pipe is connected to the regenerated catalyst inlet of the first reactor gas-solid separator.

8. A method for preparing propylene and C4 hydrocarbons from oxygen-containing compounds, including:
feeding a raw material containing an oxygen-containing compound from n reactor feed distributors to a reaction zone of a turbulent fluidized-bed reactor, and contacting the raw material with a catalyst, to generate a stream containing propylene and C4 hydrocarbons product and a spent catalyst containing carbon;
sending the stream discharged from the turbulent fluidized-bed reactor containing propylene and C4 hydrocarbons product into a product separation system, obtaining propylene, C4 hydrocarbons, light fractions, propane and hydrocarbons with five or more carbons after separation, wherein the light fractions contain more than 90 wt % of ethylene and a small amount of methane, ethane, hydrogen, CO and CO2, returning 70 wt. % or more of the light fractions to the reaction zone of the turbulent fluidized-bed reactor from the reactor feed distributor at the bottom-most of the turbulent fluidized-bed reactor, and reacting ethylene and the oxygen-containing compounds to perform an alkylation reaction in presence of the catalyst, to produce a product containing propylene; and
regenerating the spent catalyst by a fluidized-bed regenerator, and after being gas-solid separated by a first reactor gas-solid separator, the regenerated catalyst is fed to the bottom of the reaction zone of the turbulent fluidized-bed reactor.

9. The method according to claim 8 , wherein the method is carried out by using the device comprising:
a reactor shell, one or more reactor feed distributors, a first reactor gas-solid separator, a second reactor gas-solid separator, a reactor heat extractor, a product gas outlet and a reactor stripper, wherein the lower part of the turbulent fluidized-bed reactor is a reaction zone, the upper part of the turbulent fluidized-bed reactor is a settling zone, the one or more reactor feed distributors are disposed in the reaction zone, the reactor heat extractor is disposed in the reaction zone, the first reactor gas-solid separator and the second reactor gas-solid separator are placed in the settling zone or outside the reactor shell, the first reactor gas-solid separator is equipped with a regenerated catalyst inlet, the catalyst outlet of the first reactor gas-solid separator is located at the bottom of the reaction zone, the gas outlet of the first reactor gas-solid separator is located in the settling zone, the inlet of the second reactor gas-solid separator is located in the settling zone, the catalyst outlet of the second reactor gas-solid separator is placed in the reaction zone, the gas outlet of the second reactor gas-solid separator is connected to the product gas outlet, the reactor stripper passes through the reactor shell from outside to inside at the bottom of the turbulent fluidized-bed reactor and is opened in the reaction zone of the turbulent fluidized-bed reactor, a reactor stripping gas inlet is arranged at the bottom of

Assignees

• Dalian Inst Chem & Physics Cas

Inventors

• Zhang Tao
• Ye Mao
• He Changqing
• Zhang Jinling
• Wang Xiangao
• Tang Hailong
• Jia Jinming
• Zhao Yinfeng
• Liu Zhongmin

Classifications

• B01J8/0055 Primary

  using cyclones · CPC title

• Y02P20/52

  using catalysts, e.g. selective catalysts · CPC title

• Y02P30/20

  using bio-feedstock · CPC title

• Y02P30/40

  Ethylene production · CPC title

• C07C1/20 Primary

  starting from organic compounds containing only oxygen atoms as heteroatoms · CPC title