CAS: 13777-23-6; Hafnium(Iv) Iodide

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CAS号13499-05-3 四氯化铪

📜氯化铪置于氢碘酸体系中,用 乙醚,正庚烷 用作溶剂,以37%的收率获得碘化铪
参考文献:锆(II)和ha(II)的芳烃衍生物
标题:锆(II)和ha(II)的芳烃衍生物
摘要:无水四卤化物mx 4(m = Zr或hf,X = Br或i)的制备方法是,将m(bh 4)4用干燥的hx在正庚烷中作用作溶剂处理,然后在减压下升华.Zrcl 4与al-alcl 3-芳烃体系的反应导致溶液中含有锆(II)-芳烃配合物.对于苯和六甲基苯(在苯中),获得了组成为zr(亚芳基)(alcl 4)2的固体物质.根据光谱性质,化学反应性和其他数据,这些物质被认为是锆(II)衍生物,其结构与相应的钛(II)配合物已经建立的结构相似.锆(II)的六甲基苯配合物也可以通过[zr(c 6 H 6)(alcl 4)2 ]和丁-2-炔的配位体合成反应获得.获得了相应of(II)-η 6-芳烃配合物(芳烃=甲苯或均三甲苯)在溶液中存在的光谱证据.三核物种中,[zr 3氯6(η 6-C 6我6)3 ] ñ +(n = 1或2)是通过al-Alcl 3还原zrcl 4(n = 2)或用水(n = 1)处理锆(II)-C
Doi:10.1039/dt9900001813

专利信息

专利号:US-9896523-B2
优先权日:2015-06-26
标题 :Ziegler-Natta catalyst synthesis and process thereof
发明人：SINGH GURMEET; KUMAR NARESH; KAUR SUKHDEEP; BANTU BHASKER; KAPUR GURPREET SINGH; SHASHIKANT
权利人:INDIAN OIL CORP LTD
摘要:The present invention describes a process of preparing a catalyst for olefin polymerization comprising: (i) treating a magnesium metal with an organohalide along with an internal donor to obtain a reaction mixture having solid component (A); (ii) treating the reaction mixture having solid component (A) with an acyl halide to obtain a reaction mixture having solid component (B); and (iii) treating the reaction mixture having solid component (B) of step (ii) with a transition metal compound to obtain the catalyst. The present invention also relates to a process for preparation of a catalyst system from said catalyst and preparation of a polyolefins from the catalyst system.

专利号:CN-114870872-A
优先权日:2022-05-25
标题:Preparation method and application of solid superacid catalyst for isobutyraldehyde catalyzed synthesis of methyl isopropyl ketone

专利号:US-4510342-A
优先权日:1982-12-29
标 题 :High viscosity index synthetic oils and synthesis thereof
发明人：CURRIE JANIE K; MOONEY J ROBERT
权利人:STANDARD OIL CO OHIO
摘要:A method for preparing synthetic oils characterized by a high viscosity index and prepared from 1-olefin is described. The method comprises polymerizing a 1-olefin or a mixture of 1-olefins in the presence of n (a) at least one transition metal halide catalyst, n (b) at least one alkyl aluminum compound containing up to about 15 carbon atoms in each alkyl group and up to about 40 carbon atoms per molecule as a co-catalyst, and n (c) a saturated alkyl fluoride. n The homopolymers and copolymers prepared in accordance with the method of the invention generally are characterized by a high viscosity index such as between about 100 to 300. The homopolymers and copolymers are useful as synthetic lubricants and as additives to synthetic or mineral oil lubricants for modifying the viscosity index characteristics of the lubricants.

专利号:EP-3696139-A1
优先权日:2010-04-23
标题 :Synthesis, capping and dispersion of nanocrystals

专利号:EP-3190083-B1
优先权日:2010-10-27
标 题 :Synthesis, capping and dispersion of nanocrystals

专利号:US-2022033999-A1
优先权日:2014-08-18
标题:High-Strength Refractory Fibrous Materials
发明人：MAXWELL JAMES L; WEBB NICHOLAS; HOOPER RYAN; ALLEN JAMES
权利人:DYNETICS
摘要:The disclosed materials, methods, and apparatus, provide novel ultra-high temperature materials (UHTM) in fibrous forms/structures; such “fibrous materialsâ€? can take various forms, such as individual filaments, short-shaped fiber, tows, ropes, wools, textiles, lattices, nano/microstructures, mesostructured materials, and sponge-like materials. At least four important classes of UHTM materials are disclosed in this invention: (1) carbon, doped-carbon and carbon alloy materials, (2) materials within the boron-carbon-nitride-X system, (3) materials within the silicon-carbon-nitride-X system, and (4) highly-refractory materials within the tantalum-hafnium-carbon-nitride-X and tantalum-hafnium-carbon-boron-nitride-X system. All of these material classes offer compounds/mixtures that melt or sublime at temperatures above 1800° C.—and in some cases are among the highest melting point materials known (exceeding 3000° C.). In many embodiments, the synthesis/fabrication is from gaseous, solid, semi-solid, liquid, critical, and supercritical precursor mixtures using one or more low molar mass precursor(s), in combination with one or more high molar mass precursor(s). Methods for controlling the growth, composition, and structures of UHTM materials through control of the thermal diffusion regio are disclosed.