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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.:

US 11286425 B1

PDFFull Text
Date of Patent:
Mar. 29, 2022

Filed:

Jul. 10, 2020

Method for preparing needle coke for ultra-high power (uhp) electrodes from heavy oil

Applicant:

China University of Petroleum, Qingdao, CN;

Inventors:

Dong Liu, Qingdao, CN;

Xin Gong, Qingdao, CN;

Bin Lou, Qingdao, CN;

Jun Li, Qingdao, CN;

Hui Du, Qingdao, CN;

Zhihao Li, Qingdao, CN;

Assignee:

CHINA UNIVERSITY OF PETROLEUM, Qingdao, CN;

Attorney:

Bayramoglu Law Offices LLC

Primary Examiner:

Benjamin L Lebron

Int. Cl.
CPC ...
B01D 15/34 (2006.01); B01D 15/36 (2006.01); B01J 39/04 (2017.01); B01J 39/20 (2006.01); B01J 39/26 (2006.01); B01J 41/04 (2017.01); B01J 41/14 (2006.01); B01J 41/20 (2006.01); C10B 55/00 (2006.01); C10B 57/02 (2006.01); C10G 55/04 (2006.01); H05B 7/06 (2006.01);
U.S. Cl.
CPC ...
C10B 55/00 (2013.01); B01D 15/34 (2013.01); B01D 15/361 (2013.01); B01J 39/04 (2013.01); B01J 39/20 (2013.01); B01J 39/26 (2013.01); B01J 41/04 (2013.01); B01J 41/14 (2013.01); B01J 41/20 (2013.01); C10B 57/02 (2013.01); C10G 55/04 (2013.01); H05B 7/06 (2013.01); H05B 2203/017 (2013.01);
Abstract

A method for preparing needle coke for ultra-high power (UHP) electrodes from heavy oil is provided. In this method, heavy oil is used as a raw material. The size exclusion chromatography (SEC) is conducted with polystyrene (PS) as a packing material to separate out specific components with a relative molecular weight of 400 to 1,000. The ion-exchange chromatography (IEC) is conducted to remove acidic and alkaline components to obtain a neutral raw material. The neutral raw material is subjected to two-stage consecutive carbonization to obtain green coke, and the green coke is subjected to high-temperature calcination to obtain the needle coke for UHP electrodes. The needle coke has a true density of more than 2.13 g/cmand a coefficient of thermal expansion (CTE) of ≤1.15×10/° C. at 25° C. to 600° C.

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