公开(公告)号：US11542172B1

公开(公告)日：2023-01-03

申请号：US17873651

申请日：2022-07-26

申请人： Qinghai Institute of Salt Lakes, Chinese Academy of Sciences

发明人： Jinbo Zeng ,  Chunxi Hai ,  Yue Shen ,  Yuan Zhou ,  Xiang Li ,  Xiufeng Ren ,  Yanxia Sun ,  Xia Shen ,  Chengrong Zhang ,  Jianghua Liu

IPC分类号： C01F7/30 ,  C01F7/441

摘要： Disclosed are methods for preparing high-purity boehmite and porous gamma-alumina nano-powder, comprising: adding aluminum isopropoxide into water and stirring the aluminum isopropoxide added water, then adding aluminum hydroxide generated by hydrolysis of high-purity aluminum powder into that stirred water, stirring that aluminum hydroxide added water to obtain a mixed system; carrying out hydrothermal reaction on the mixed system, performing centrifuging, washing, drying and crushing to the reacted mixed system, obtaining high-purity boehmite; calcining the high-purity boehmite to obtain porous gamma (γ)-alumina nano-powder. By strictly controlling the addition of isopropanolic aluminum and the temperature as well as the duration of the hydrothermal reaction, the product boehmite γ-AlOOH obtains good character in terms of crystalline structure, purity, morphology and dispersion; γ-Al2O3 obtained after calcining remains basically the same morphology as that of boehmite powder with good powder dispersion and no major changes.

公开(公告)号：US11740032B2

公开(公告)日：2023-08-29

申请号：US17851693

申请日：2022-06-28

申请人： Qinghai Institute of Salt Lakes, Chinese Academy of Sciences

发明人： Yue Shen ,  Yuan Zhou ,  Xiang Li ,  Shengdi Zhang ,  Chunxi Hai ,  Yanxia Sun ,  Jinbo Zeng ,  Xiufeng Ren

IPC分类号： F28D20/02 ,  C09K5/04 ,  C09K5/06 ,  G01N25/48

CPC分类号： F28D20/02 ,  C09K5/044 ,  C09K5/063 ,  G01N25/4893

摘要： Disclosed is a method for enhancing thermal energy storage performance of industrial grade hydrated salts based on phase change, comprising: heating an aqueous system of industrial grade hydrated salts containing 105-130 percent (%) by mass of m0 industrial grade hydrated salt to m0, taking a sample for differential scanning calorimeter testing and recording its melting enthalpy as ΔH1; melting and adding water into, or melting and evaporating the residual aqueous system of industrial grade hydrated salts or the residual industrial grade hydrated salts system with a mass of m1 to increase or decrease the mass by 0.4-0.8% m0 until a melting enthalpy ΔHn of a sample that taken from the residual aqueous system of industrial grade hydrated salts with a mass of mn satisfies ΔH2 ΔHn+1.