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Journal of Dispersion Science and Technology Volume 39, 2018 - Issue 2
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Original Articles

Separation of oil content from oily cuttings in CO2-responsive switch water

Wenmeng DuanCollege of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China;Engineering Research Center of Oilfield Chemistry Ministry of Education, Chengdu, People’s Republic of China
,
Ruijiao WangCollege of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
,
Dongfang LiuCollege of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China
&
Hongsheng LuCollege of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People’s Republic of China;Engineering Research Center of Oilfield Chemistry Ministry of Education, Chengdu, People’s Republic of ChinaCorrespondence[email protected]
Pages 155-162 | Received 15 Feb 2017, Accepted 04 Mar 2017, Published online: 20 Apr 2017
 
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ABSTRACT

“Switch water” (SW) is an aqueous solution of switchable ionic strength trigger by CO2. In this article, three tertiary amino alcohols were chosen to build CO2-responsive SW. An ingenious recyclable SW–diesel oil emulsion system was built to separate oily content from oily cuttings. The separation rate of diesel oil from emulsion almost reached 100% after CO2 treatment under appropriate conditions. Recycling of SW was easily done by N2 treatment. Compared with the traditional methods, CO2-responsive SW which is energy saving, pollution free, and efficient has all the qualifications to become a mainstream treatment in the near future.

GRAPHICAL ABSTRACT

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