Liquefied dimethyl ether based multi-stage extraction for high efficient oil recovery from spent bleaching clay

被引：6

作者：

Zhang, Dong ^{[1
,2
]}

Huang, Ying ^{[1
]}

Oshita, Kazuyuki ^{[2
]}

Takaoka, Masaki ^{[2
]}

Wang, Quan ^{[2
]}

Sheng, Changdong ^{[1
]}

Lin, Zizeng ^{[3
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Dept Environm Sci & Technol, Sipailou 2, Nanjing 210096, Peoples R China

[2] Kyoto Univ, Grad Sch Engn, Dept Environm Engn,Cluster C, Nishikyo Ku, Kyoto 6158540, Japan

[3] Nanjing Forest Univ, Civil Coll, 159 Longpan Rd, Nanjing 210037, Peoples R China

来源：

WASTE MANAGEMENT | 2021年 / 136卷

基金：

中国国家自然科学基金;

关键词：

Oil recovery; Spent bleaching clay; Liquefied dimethyl ether; Adsorption equilibrium; Multi-stage batch extraction; SOLVENT-EXTRACTION; SEWAGE-SLUDGE; EARTH; WATER; REGENERATION; FABRICATION; PYROLYSIS; LIQUID;

D O I：

10.1016/j.wasman.2021.09.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

With the increasing production of spent bleaching clay (SBC), the recovery of the waste oil in SBC is becoming an important and urgent needs for our environment and economy. In this research, we have developed a new effective recovery technique to recover oil from SBC by use of liquefied dimethyl ether (DME). Over 65 wt% oil and 81% wt.% oil are efficiently recovered from SBC under equilibrium single-stage extraction conditions and multi-stage extraction conditions, respectively based on the systematically investigation to the effects of the DME/SBC ratio, extraction time, stirring speed and extraction stage number on oil recovery via a batch extractor. Compared with using other extraction solvents, the extraction solvent DME can be reused without heating and therefore significantly reduce the energy consumption during the oil recovery process. In addition, the quantitative oil extraction relationship is derived from the adsorption equilibrium model and is well verified by experimental results. The results show a great potential for using this oil recovery technique in SBC as well as in the large amount of oily sludge and oil sands.

引用

页码：204 / 212

页数：9