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公开(公告)号：US11292038B2
公开(公告)日：2022-04-05
申请号：US17292729
申请日：2020-10-19
发明人： Dong Liu , Shuhai Guo , Wei Zhu , Fushan Wen , Nan Shi , Yu Qiu , Xiaoning Feng , Bo Wu , Gang Li , Changlong Yin , Xiujie Yang , Dehui Kong , Hongbo Dai , Mengfei Li , Sa Wang
IPC分类号： B09C1/00 , B01J23/745 , B01J35/00 , B01J37/04 , B01J37/06 , B01J37/08 , B09C1/06 , B09C1/08 , C01G49/00
摘要： A combined remediation method of petroleum-contaminated soil includes: impurity removal pretreatment, photocatalytic pre-oxidation, stepwise thermal desorption of petroleum from soil, and high-temperature oxidation; with iron-titanium composite metal oxide (ITCMO) as a catalyst, conducting oxidation pretreatment under light conditions so that some cross-linked structures in macromolecular petroleum contaminants are broken and degraded; and conducting stepwise pyrolysis to achieve a removal rate of more than 98.00%. The new method adopts a combined remediation technology of photocatalytic pre-oxidation-stepwise pyrolysis, which realizes a relatively-high removal rate of petroleum hydrocarbons and the efficient and harmless remediation of high-concentration petroleum-contaminated soil, and remedied soil can be reused.
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公开(公告)号：US11286425B2
公开(公告)日：2022-03-29
申请号：US17423488
申请日：2020-07-10
IPC分类号： B01D15/34 , B01D15/36 , B01J39/04 , B01J39/20 , B01J39/26 , B01J41/04 , B01J41/14 , B01J41/20 , C10B55/00 , C10B57/02 , C10G55/04 , H05B7/06
摘要： 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.
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3.发明授权公开(公告)号：US11149361B1
公开(公告)日：2021-10-19
申请号：US17315390
申请日：2021-05-10
发明人： 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
摘要： 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.
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