The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2020
Filed:
Sep. 30, 2017
Shaanxi Normal University, Shaanxi, CN;
Pengfei Niu, Shaanxi, CN;
Nongxue Qiu, Shaanxi, CN;
Xiaojie Su, Shaanxi, CN;
Yurong Guo, Shaanxi, CN;
Yonghong Meng, Shaanxi, CN;
Hong Deng, Shaanxi, CN;
SHAANXI NORMAL UNIVERSITY, Shaanxi, CN;
Abstract
A high-efficiency supercritical oil extraction method is provided. According to the method, in an early extraction stage, extraction is performed using an extractant along an extraction kettle from top to bottom; in a middle extraction stage, the extraction kettle is longitudinally flipped by 180 degrees, extraction is still performed using an extractant along the extraction kettle from top to bottom; in a later extraction stage, extraction is performed using a conventional extractant along the extraction kettle from bottom to top. Thus, the pressure effect and the critical extraction effect of the critical extractant are simultaneously exerted, thereby greatly improving the extraction efficiency of supercritical oil extraction, shortening the extraction time, and reducing the dosage of extractant, so as to achieve high-efficiency and low-cost oil extraction.