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Journal of Rare Earths 2007年第3期25卷 321-328页

作者：王晓宁赵震徐春明段爱军张莉姜桂元 State Key Laboratory of Heavy Oil Processing China University of Petroleum

The effects of rare earth（RE）on the structure,acidity,and catalytic performance of HZSM-5 zeolite were investigated.A series of RE/HZSM-5 catalysts,containing 7.54% RE（RE=La,Ce,Pr,Nd,Sm,Eu or Gd）,were prepared by the impregnation of the ZSM-5 type zeolites（Si/Al=64：1）with the corresponding RE nitrate aqueous *** catalysts were characterized by means of FT-IR,UV-Vis,NH3-TPD,and IR spectroscopy of adsorbed *** catalytic performances of the RE/HZSM-5 for the catalytic cracking of mixed butane to light olefins were also measured with a fixed bed *** results revealed that the addition of light rare earth metal on the HZSM-5 catalyst greatly enhanced the selectivity to olefins,especially to propylene,thus increasing the total yield of olefins in the catalytic cracking of *** the RE-modified HZSM-5 samples,Ce/HZSM-5 gave the highest yield of total olefins,and Nd/HZSM-5 gave the highest yield of propene at a reaction temperature of 600℃.The presence of rare earth metal on the HZSM-5 sample,not only modified the acidic properties of HZSM-5 including the amount of acid sites and acid type,that is,the ratio of L/B（Lewis acid/Brnsted acid）,but also altered the basic properties of it,which in turn promoted the catalytic performance of HZSM-5 for the catalytic cracking of butane.

关键词： fight rare earth HZSM-5 zeolite catalytic cracking butane acidity

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Oxidative Dehydrogenation of butane to Butadiene and Butene Using a Novel Inert Membrane Reactor

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Chinese Journal of Chemical Engineering 2000年第4期8卷 374-378页

作者：葛善海刘长厚范煜王连军 Dalian Univ Technol Dept Chem Engn Dalian 116012 Peoples R China

The oxidative dehydrogenation of butane to butadiene and butene was studied using a conventional fixed-bed ractor (FBR), inert membrane reactor (IMR) and mixed inert membrane reactor (MIMR). When IMR and MIMR were employed, a ceramic membrane modified by partially coating with glaze was used to distribute oxygen to a fixed-bed of 24-V-Mg-O catalyst. The oxygen partial pressure in the catalyst bed could be decreased. The effect of feeding modes and operation conditions were investigated. The selectivity of C4 dehydrogenation products (butene and butadiene) was found to be higher in IMR than in FBR. The feeding mode with 20% of air mixing with butane in MIMR was found to be more efficient than the feeding mode with all air permeating through ceramic membrane. The MIMR gave the most smooth temperature profile along the bed.

关键词： butane ceramic membrane oxidative dehydrogenation membrane reactor catalyst/V-Mg-O

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Separation of butane isomer by tubular silicalite-1 zeolite membrane

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Chinese Science Bulletin 1998年第24期43卷 2074-2078页

作者： Xiaochun Xu Mojie Cheng Weishen Yang Liwu Lin Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China

The permeation properties of n-butane, i-butane and n-butane/i-butane mixture （n-butane 24.3% （molar ratio）, i-butane 75.7%） through a tubular silicalite1 zeolite membrane were studied at 298 and 473 K respectively. The permselectivities of n-butane and i-butane under pressure difference of 0.06 MPa at 298 and 473 K were 16.3 and 7.4 respectively. The separation factors of n-butane/i-butane mixture were between 2.0 and 2.5 at 298 and 473 K. At 298 K, the permeances of n-butane in the mixture were lower than those of single component while the permeances of i-butane in the mixture were almost the same as those of single component. At 473 K, the permeances of n-butane and i-butane in the mxiture were decreased compared with those of the single component, and the permeance of n-butane decreased more rapidly than that of i-butane.

关键词： silicalite1 zeolite membrane butane isomer separation.

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Ground and flight tests of AlSat-1B butane propulsion system

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Propulsion and Power Research 2022年第1期11卷 74-84页

作者： D.Darfilala D.Gibbon Satellite Development Center CDS Algerian Space Agency ASALBP 4065Ibn Rochd USTOOran31130Algeria Surrey Satellite Technology Ltd. GuildfordSurrey GU27YEUnited Kingdom

On September 26,2016 Algerian Space Agency launched AlSat-1B,the second in a series of medium resolution earth observation satellites ***-1B electro-thermal propulsion system follows the classic design principle that has been used on previous SSTL-100 *** a total dry weight of 5.17 kg,the system is filled with 2.35 L selfpressurized *** thruster assembly is designed to use 15 W(at 28 V)redundant heater elements,it is designed to have an average mission thrust of 50 *** a warm up time of 10 min,the temperature of the butane will be increased by over 250℃.This is the equivalent of about 35%gain in specific impulse over ambient temperature *** spacecraft dry weigh at launch site was 107 kg,the propulsion system is designed to provide at least 19 m/s Delta-v to meet the spacecraft’s mission *** investigate the system readiness for flight,a series of performance tests have been completed at the Surrey Satellite Technology Ltd laboratories(United Kingdom),Satellite Development Centre(Algeria)and Satish Dhawan Space Centre rocket launch site(India),the results of these tests as well as initial flight test results are presented in this paper.

关键词： Space Propulsion butane Resistojet Heaters Specific impulse

MICROCALORIMETRIC STUDIES OF Pt-Sn CATALYSTS SUPPORTED ON CALCINED HYDROTALCITE FOR butane DEHYDROGENATION

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Chinese Journal of Catalysis 1998年第1期 2-3页

作者： Li Zhiyu, Tu Mai, Shen Jianyi ** (Department of Chemistry, Nanjing University, Nanjing 210093) Jia Jifei, Xu Zhusheng, Lin Liwu (Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023)

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关键词： Platinum tin catalyst Hydrotalcite butane Dehydrogenation Microcalorimetry

n-butane ISOMERIZATION ON Al-PROMOTED SULFATED ZIRCONIA CATALYSTS

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Chinese Journal of Catalysis 1998年第2期 4-5页

作者： Xia Yongde, Hua Weiming, Miao Changxi, Gao Zi**(Department of Chemistry, Fudan University, Shanghai 200433)

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关键词： butane Isomerization Sulfuric acid Alumina Zirconia Acid strength distribution

Impregnation of Crushed Stone with Bitumenous Compounds Using Propane/butane Impregnation Process Carried out in Supercritical Fluid Conditions

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American Journal of Analytical Chemistry 2014年第14期5卷 945-956页

作者： Farid M. Gumerov Mansur I. Farakhov Vener F. Khayrutdinov Farizan R. Gabitov Zufar I. Zaripov Ilnar Sh. Khabriyev Talgat R. Akhmetzyanov Federal State Budgetary Educational Institution of Higher Professional Education Kazan National Research Technological University Kazan Russia Limited Liability Company Engineering-Promotional Center “Inzhekhim” Kazan Russia

An efficient technology of impregnation of carbonate crushed stone by oil-product based on SCF-impregnation process usage with propane/butane solvent was developed. Regular impregnation throughout the volume of crushed stone sample is achieved. As a result of the appliance of proposed technology, the humidity of the treated crushed stone samples decreased down to 0.54%.

关键词： Impregnation Carbonate Crushed Stone Propane butane Supercritical Fluid

Iridium-Catalyzed Enantioselective C(sp^3)-H Borylation of Cyclobutanes

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Chinese Journal of Chemistry 2020年第12期38卷 1533-1537页

作者： Xiang Chen Lili Chen Hongliang Zhao Qian Gao Zhenlu Shen Senmiao Xu College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory for Oxo Synthesis and Selective Oxidation Center for Excellence in Molecular SynthesisSuzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Hangzhou Normal UniversityHangzhou 311121China

of main observation and conclusion We herein report the first example of iridium-catalyzed enantioselective C(sp^3)-H borylation of cyclobutanes using benzoxazoline as the directing *** combination of a chiral bidentate boryl ligand and an iridium precursor has found to effectively catalyze C(sp)-H borylation to afford a variety of cyclobutylboronates with good to excellent *** also demonstrate the synthetic utility of the current method by converting the stereogenic C—B bond to other functionalities.

关键词： group. butane boron

Metal-Carbene-TempIated Photochemistry in Solution: A Universal Route towards Cyclobutane Derivatives

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Chinese Journal of Chemistry 2019年第11期37卷 1147-1152,I0002页

作者： Yang Li Guang-Feng Jin Yuan-Yuan An Rajorshi Das Ying-Feng Han Key Laboratory of Synthetic and Natural Functional Molecule Chemistry College of Chemistry and Materials ScienceNorthwest UniversityXi'anShaanxi 710127China

Background and Originality Content Cyclobutane moieties are an important class of motifs since they are frequently found in the medicinally relevant compounds such as alkaloids and pharmaceuticals.[1] Therefore,the development of efficient synthetic strategies for the construction of cyclobutanes and their derivatives has always been a focus of inter-est.[2a] Photochemical reactions are powerful tools for synthesizing compounds with high complexity and diversity.[2b-h] Among them,photochemical[2+2]cycloaddition is a widely used protocol for the preparation of such compounds.[2h]However,this kind of reaction always suffers from the challenges of controlling the resulting products of the intermolecular[2+2]*** principle,to achieve cyclobutanes via[2+2]cycloaddition,the two olefins should be oriented in a parallel fashion keeping the distance less than 4.2 A apart from each other.

关键词： butane photochemical alkaloids

Highly Stereoselective Direct Construction of Diaryl-Substituted Cyclobutanes

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Chinese Journal of Chemistry 2020年第3期38卷 259-262页

作者： Xiang-Yang Song Liu-Peng Zhao Lijia Wang Yong Tang State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesUniversity of Chinese Academy of Sciences345 Lingling LuShanghai 200032China Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistryEast China Normal University3663 North Zhongshan RoadShanghai 200062China

A copper catalyzed stereoselective[2+2]cyclization has been developed,providing a concise protocol to the direct construction of diaryl-substituted cyclobutanes in up to 99%yield with up to>95/5 ***,the enantioselective version of this reaction has also been achieved,leading to a series of optically active diaryl-substituted cyclobutanes with up to 94%ee.

关键词： substituted butane Highly