Title:
COMPOSITE LAYER COALESCING ADSORBENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/259595
Kind Code:
A1
Abstract:
The present invention provides a composite layer coalescing adsorbent, comprising an outer adsorbent layer containing a low silicon X molecular sieve and an inner adsorbent layer containing a high silicon X molecular sieve, the molar ratio of silica to alumina of the low silicon X molecular sieve is 2.07 to 2.18, the molar ratio of silica to alumina of the high-silicon X molecular sieve is 2.2 to 2.5, the adsorbent includes 95.0 to 100% by mass of a X molecular sieve and 0 to 0.5% by mass of a matrix based on the total mass of the adsorbent, and the cationic site of the X molecular sieve in the adsorbent is occupied by Group IIA metal or both Group IA metal and Group IIA metal. The adsorbent is suitable for the process of adsorption and separation of PX from C8 aromatic hydrocarbons using light aromatic hydrocarbons as a desorbent, with relatively high adsorption selectivity and good mass transfer performance.
Inventors:
GAO NINGNING (CN)
WANG HUIGUO (CN)
LIU YUSI (CN)
WANG HUIGUO (CN)
LIU YUSI (CN)
Application Number:
PCT/CN2020/098147
Publication Date:
December 30, 2020
Filing Date:
June 24, 2020
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC RES INST PETROLEUM (CN)
SINOPEC RES INST PETROLEUM (CN)
International Classes:
B01J20/12; B01J20/18; B01J20/30; C01B39/22; C07C7/00; C07C7/13; C07C15/08
Domestic Patent References:
| WO2015057280A1 | 2015-04-23 |
Foreign References:
| CN101497022A | 2009-08-05 | |||
| CN1347339A | 2002-05-01 | |||
| CN108525641A | 2018-09-14 | |||
| US20120330081A1 | 2012-12-27 | |||
| US20180170834A1 | 2018-06-21 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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