公开(公告)号：US11286425B2

公开(公告)日：2022-03-29

申请号：US17423488

申请日：2020-07-10

Applicant: China University of Petroleum

Inventor： Dong Liu ,  Xin Gong ,  Bin Lou ,  Jun Li ,  Hui Du ,  Zhihao Li

IPC: B01D15/34 ,  B01D15/36 ,  B01J39/04 ,  B01J39/20 ,  B01J39/26 ,  B01J41/04 ,  B01J41/14 ,  B01J41/20 ,  C10B55/00 ,  C10B57/02 ,  C10G55/04 ,  H05B7/06

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/cm3 and a coefficient of thermal expansion (CTE) of ≤1.15×10−6/° C. at 25° C. to 600° C.

公开(公告)号：US11149361B1

公开(公告)日：2021-10-19

申请号：US17315390

申请日：2021-05-10

Applicant: China University of Petroleum

Inventor： Dong Liu ,  Xin Gong ,  Bin Lou ,  Jun Li ,  Zhihao Li ,  Nan Shi ,  Fushan Wen ,  Hui Du ,  Zhaojun Chen ,  Changlong Yin ,  Xiujie Yang ,  Luning Chai ,  Zhichen Zhang ,  Enqiang Yu ,  Yu'e Fu ,  Huizhi Yuan ,  Jianguo Zhang ,  Zhiqing Ma ,  Chong Jiao ,  Yonggang Cao

IPC: B01D15/34 ,  B01D15/36 ,  B01J20/26 ,  B01J20/28 ,  D01F9/15 ,  D01F9/155 ,  C10C3/08 ,  B01D15/18

Abstract: Preparation methods of a high modulus carbon fiber (HMCF) and a precursor (mesophase pitch (MP)) thereof are provided. The preparation method of MP includes: separating components with a molecular weight distribution (MWD) of 400 to 1,000 from a heavy oil raw material through size-exclusion chromatography (SEC); subjecting the components to ion-exchange chromatography (IEC) to obtain modified feedstock oil, where, the components are passed through macroporous cation-exchange and anion-exchange resins in sequence to remove acidic and alkaline components; and subjecting the modified feedstock oil to thermal polycondensation and carbonization to obtain high-quality MP with prominent spinnability. With high mesophase content, low softening point, low viscosity, and prominent meltability and spinnability, the obtained MP is a high-quality raw material for preparing HMCFs. The obtained MP can be subjected to melt spinning, pre-oxidation, carbonization, and graphitization to obtain an MP-based HMCF.