Title:
HYDROGEN PRE-TREATMENT AND PURIFICATION METHOD FOR WASTE LUBRICATING OIL
Document Type and Number:
WIPO Patent Application WO/2022/100764
Kind Code:
A1
Abstract:
The present invention relates to a hydrogen pre-treatment and purification method for waste lubricating oil, the method comprising the following steps: mechanical impurities are removed from waste lubricating oil, and then the oil is subjected to flash distillation to separate free water and a portion of light hydrocarbons; a bottom product of the flash distillation column is mixed with hydrogen and a self-vulcanizing oil-soluble transition metal catalyst, and then enters a slurry bed reactor for hydrogen pre-treatment; a gas product obtained by performing separation on a reaction effluent is subjected to adsorption purification and then enters a hydrogen recycle compressor for cyclic use; a liquid product obtained by performing separation on a reaction effluent is subjected to hydrocyclone separation and solvent washing to remove solid residue, and finally a purified lubricating oil component is obtained. The method of the present invention has such advantages as simple processing procedures, a high non-ideal component conversion rate, a high oil liquid yield, and good quality. In addition, the oil-soluble catalyst features simple dispersion, no need for vulcanization, a small catalyst adding amount, high low-temperature hydrogenation activity, and is capable of effectively preventing the coking that could occur during a process of preheating the waste lubricating oil, markedly extending the operational lifespan of a waste lubricating oil hydrogen treatment device.
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Inventors:
LIU BIN (CN)
CHAI YONGMING (CN)
LIU CHENGUANG (CN)
PAN YUAN (CN)
LI YICHUAN (CN)
ZHANG KONGYUAN (CN)
LIU YUNQI (CN)
CHAI YONGMING (CN)
LIU CHENGUANG (CN)
PAN YUAN (CN)
LI YICHUAN (CN)
ZHANG KONGYUAN (CN)
LIU YUNQI (CN)
Application Number:
PCT/CN2022/071134
Publication Date:
May 19, 2022
Filing Date:
January 10, 2022
Export Citation:
Assignee:
UNIV CHINA PETROLEUM EAST CHINA (CN)
International Classes:
C10M175/00; B01J27/047; B01J27/049; B01J27/051; B01J31/02; C10G47/02; C10G47/26; C10G49/22; C10G67/00; C10G67/14
Foreign References:
| CN112500916A | 2021-03-16 | |||
| CN110194968A | 2019-09-03 | |||
| CN110237851A | 2019-09-17 | |||
| CN1386826A | 2002-12-25 | |||
| CN103254934A | 2013-08-21 | |||
| CN109225647A | 2019-01-18 | |||
| CN102050769A | 2011-05-11 | |||
| US4606809A | 1986-08-19 |
Attorney, Agent or Firm:
BEIJING ZHIRAN LAW FIRM (CN)
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