Title:
METHOD FOR SELECTIVE HYDROGENATION OF BUTADIENE EXTRACTION TAIL GAS AND SELECTIVE HYDROGENATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/089250
Kind Code:
A1
Abstract:
Provided are a method for selective hydrogenation of butadiene extraction tail gas and a selective hydrogenation apparatus. The method for selective hydrogenation of butadiene extraction tail gas comprises: (1) feeding alkyne-containing tail gas from a butadiene extraction apparatus into a feedstock tank, and optionally removing impurities entrained in said alkyne-containing tail gas prior to feeding into said feedstock tank; (2) pressurizing the carbon C4 raw material in the feedstock tank by a material feed pump to a pressure required for reaction, then combining with recycled C4 from a buffer tank at the outlet of a one-stage reactor and then entering a one-stage mixer, mixing with hydrogen in the one-stage mixer, then entering a one-stage reactor for one-stage hydrogenation reaction, and the obtained one-stage reaction stream flowing into a one-stage reactor outlet buffer tank; the hydrogen gas required for the reaction in the one-stage reactor being dispensed in a first manner of addition or a second manner of addition; the first manner of addition is: all of the hydrogen gas required for reaction entering by means of the one-stage reactor outlet buffer tank, then entering a one-stage reactor by means of a first path at the exit of one-stage reactor outlet buffer tank; the second manner of addition is: part of the hydrogen gas required for reaction entering by means of the one-stage reactor outlet buffer tank, then entering a one-stage reactor by means of a first path at the exit of one-stage reactor outlet buffer tank; the other part of the hydrogen entering by means of the one-stage mixer, then entering the one-stage reactor; (3) the one-stage reactor outlet buffer tank has no gas-phase discharge, and the liquid-phase product is divided into at least two strands, the first strand returning to the one-stage reactor as recycled C4, the second strand entering a stabilization column as stabilization column feed or being subjected to further hydrotreating, then entering the stabilization column; (4) separating via the stabilization column and then extracting a C4 hydrogenation product.
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Inventors:
LI YAN (CN)
TIAN JUN (CN)
LI DONGFENG (CN)
GUO LIANG (CN)
LI CHUNFANG (CN)
YUE YI (CN)
DU ZHOU (CN)
SHU ZHAN (CN)
LUO SHUJUAN (CN)
YE JIEMING (CN)
CUI TING (CN)
TIAN JUN (CN)
LI DONGFENG (CN)
GUO LIANG (CN)
LI CHUNFANG (CN)
YUE YI (CN)
DU ZHOU (CN)
SHU ZHAN (CN)
LUO SHUJUAN (CN)
YE JIEMING (CN)
CUI TING (CN)
Application Number:
PCT/CN2021/124668
Publication Date:
May 05, 2022
Filing Date:
October 19, 2021
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
BEIJING RES INST CHEMICAL IND CHINA PETROLEUM & CHEMICAL CORP (CN)
BEIJING RES INST CHEMICAL IND CHINA PETROLEUM & CHEMICAL CORP (CN)
International Classes:
C07C5/09; C10G70/02
Foreign References:
| CN102336626A | 2012-02-01 | |||
| CN102285860A | 2011-12-21 | |||
| CN103121905A | 2013-05-29 | |||
| EP1217060A1 | 2002-06-26 | |||
| CN102285859A | 2011-12-21 | |||
| CN103121905A | 2013-05-29 | |||
| CN108863697A | 2018-11-23 | |||
| CN103787811A | 2014-05-14 | |||
| CN109806885A | 2019-05-28 | |||
| CN102240547A | 2011-11-16 | |||
| CN102886262A | 2013-01-23 | |||
| CN10886397A | ||||
| CN104707622A | 2015-06-17 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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