CN1022098C - 氢化铝钠的合成方法 - Google Patents

氢化铝钠的合成方法 Download PDF

Info

Publication number
CN1022098C
CN1022098C CN 89108190 CN89108190A CN1022098C CN 1022098 C CN1022098 C CN 1022098C CN 89108190 CN89108190 CN 89108190 CN 89108190 A CN89108190 A CN 89108190A CN 1022098 C CN1022098 C CN 1022098C
Authority
CN
China
Prior art keywords
sodium
sodium hydride
hydride
thf
nah
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 89108190
Other languages
English (en)
Other versions
CN1051152A (zh
Inventor
申泮文
车云霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nankai University
Original Assignee
Nankai University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nankai University filed Critical Nankai University
Priority to CN 89108190 priority Critical patent/CN1022098C/zh
Publication of CN1051152A publication Critical patent/CN1051152A/zh
Application granted granted Critical
Publication of CN1022098C publication Critical patent/CN1022098C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

本申请提供了一种完全新的合成氢化铝钠的方法,其生成的氢化钠为微细分散的活性极高的固体,它与三氯化铝四氢呋喃溶液反应生成氢化铝钠。

Description

本发明属于无机合成化学领域。
氢化铝钠NaAlH4是Schlesinger和Finholt在1951年首次报道的[H.I.Schlesmger and A.E.Finholt,U.S.Patent,2576311(1951)]。
它是一种还原性能很强的络合氢化物,其还原性与LiAlH4相近。由于在组成中以钠代替锂,本应是一种比LiAlH4应用更广泛的较价廉的还原试剂,但由于合成方法上存在一定困难,致使该产品至今在国际市场上尚未能商品化。
文献中报道的合成方法[U.S.Patent 2576311(1951),Czech,Patent 89103(1959),U.S.Patent 2900-224(1959)]是将溴化铝与氢化钠在醚型溶剂中反应,或用三乙基铝作催化剂,令氯化铝与氢化钠反应,生成NaAlH4
这类反应的困难之点在于反应中生成的氯化钠微晶沉积在氢化钠粒子上,阻滞了反应的继续进行,反应速度逐渐减慢以至最后阻断。另外在搅拌下析出的氯化钠在溶剂中形成凝胶状沉淀,使产品难于分离。
本发明的目的是要找出一种简便实用的方法来合成NaAlH4
本发明首先利用金属有机催化反应改变氢化钠的合成方法,使金属钠的氢化反应可以在常温常压条件下进行,节约了能源消耗,并生成活性很高的微细粒子的氢化钠,然后洗除催化剂,再在四氢呋喃中令氢化钠与三氯化铝四氢呋喃溶液反应,合成氢化铝钠。合成反应不需引发剂即能在常温下快速平稳进行,反应式如下:
(1)金属钠的常温常压催化氢化:
Na(s)+1/2H (常温常压)/(催化剂,THF) NaH(s)
催化剂=萘+TiCl4;THF=四氢呋喃
(2)氢化钠与三氯化铝的复合以应:
4NaH(s)+AlCl3(THF) (THF)/(常温) NaAlH4(THF)+3NaCl(s)
本合成方法的特点与效果是:
(1)氢化钠的合成与经典方法极大不同,在常温常压下催化合成,除了节约了能源之外,所得产物氢化钠有很高的化学活性。
(2)第二步复合反应因NaH活性高且微细分散,反应不需引发剂,可直接按计量比在常温下直接与AlCl3快速的反应,缩短了反应时间。
(3)设备条件简单,操作简易,原料易得,危险性小。产率依钠计为65%,纯度可达70%。经在THF中一次重结晶纯度可达95%。
[实例1]氢化钠的催化合成
在氩气氛中,将0.2摩尔切碎的金属钠,0.02摩尔萘和120毫升四氢呋喃放入干燥的反应圆底烧瓶中,加入0.004摩尔四氯化钛,然后在搅拌下通入氢气,用氢气流量计监测氢气用量。当进气与出气流量相等时即为反应终点。冷却后令反应混合物离心沉降,抽吸上层清液,然后用适量四氢呋喃洗涤产物数次以洗除催化剂,最后将产品在真空干燥器中抽干,取样测定活性氢。产品纯度高于90%。以钠计产率基本上是定量的。此法制得的氢化钠活性很高,在空气中会自燃,故操作应在惰性气氛中进行。
[实例2]氢化铝钠的合成反应
按照上述氢化钠纯度计算,称取化学计量的无水三氯化铝,溶解在适量的THF形成悬浮液,然后装上回流冷凝管,滴液漏斗和搅拌器。在搅拌下通过滴液漏斗将AlCl3(THF)逐滴加入到NaH的THF悬浮液中。滴加完毕后,继续搅拌6-7小时,然后静置48小时。抽吸出上层清液,加入略少于清液体积的干燥甲苯,在油浴温度不高于80℃的条件下蒸出四氢呋喃,即得白色结晶状的NaAlH4,纯度为70%,依NaH产率为65%,产品经一次THF重结晶纯度可达95%。
所得产品的X-射线衍射谱图见图1,与ASTM卡片标准谱图一致。

Claims (1)

1、一种氢化铝钠的合成方法,它包括
(1)金属钠与氢气反应制备NaH,
(2)NaH与AlCl3反应生成NaAlH4
其特征在于制备NaH时是以萘和TiCl4作催化剂,在四氢呋喃介质中于常温下合成,其中Na、萘、TiCl4的摩尔比为1∶0.1∶0.02,四氢呋喃的用量按每摩尔金属钠加入600毫升计算,而制备NaAlH4时,NaH与AlCl3的摩尔比为4∶1。
CN 89108190 1989-10-25 1989-10-25 氢化铝钠的合成方法 Expired - Fee Related CN1022098C (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 89108190 CN1022098C (zh) 1989-10-25 1989-10-25 氢化铝钠的合成方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 89108190 CN1022098C (zh) 1989-10-25 1989-10-25 氢化铝钠的合成方法

Publications (2)

Publication Number Publication Date
CN1051152A CN1051152A (zh) 1991-05-08
CN1022098C true CN1022098C (zh) 1993-09-15

Family

ID=4857480

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 89108190 Expired - Fee Related CN1022098C (zh) 1989-10-25 1989-10-25 氢化铝钠的合成方法

Country Status (1)

Country Link
CN (1) CN1022098C (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1304276C (zh) * 2003-12-04 2007-03-14 复旦大学 一种含铝纳米络合物贮氢材料及其制备方法、应用
ATE495775T1 (de) 2005-05-10 2011-02-15 Novo Nordisk As Injektionsvorrichtung mit optischem sensor
WO2010092156A1 (en) 2009-02-13 2010-08-19 Novo Nordisk A/S Medical device and cartridge
CN101531338B (zh) * 2009-03-13 2010-12-01 六九硅业有限公司 一种氢化铝钠制备方法
CN104445209A (zh) * 2014-11-28 2015-03-25 嵩县中科孵化器有限公司 硅烷的制备方法
CN114437123B (zh) * 2022-02-23 2023-05-16 沧州临港星辰化工有限公司 一种双(2-甲氧基乙氧基)二氢铝钠甲苯溶液的制备方法

Also Published As

Publication number Publication date
CN1051152A (zh) 1991-05-08

Similar Documents

Publication Publication Date Title
Piccolrovazzi et al. Electronic effects in homogeneous indenylzirconium Ziegler-Natta catalysts
CA1135480A (en) Process for the production of magnesium hydrides
Finholt et al. Lithium aluminum hydride, aluminum hydride and lithium gallium hydride, and some of their applications in organic and inorganic chemistry1
Ott et al. An investigation of the reaction of bis (cyclopentadienyl) titanium dichlorides with trimethylaluminum. Mechanism of an. alpha.-hydrogen abstraction reaction
Berger et al. Kinetics of the polymerization of ethylene with a ziegler‐natta catalyst. I. Principal kinetic features
JPH1087682A (ja) 遷移金属化合物
Villanueva et al. Reactions of palladium amide complexes with dimethyl acetylenedicarboxylate. Palladium-mediated carbon-nitrogen bond formation
CN101348501B (zh) 2-亚胺基-9-苯基-1,10-菲咯啉过渡金属配合物及其制备方法与应用
CN1022098C (zh) 氢化铝钠的合成方法
JP3474317B2 (ja) 水素化マグネシウムの製法
US6780808B2 (en) Enhanced solubility of magnesium halides and catalysts and polymerization process using same
CA2131870C (en) Method for the preparation of aluminum hydride (a1h3), by reacting magnesium hydride with aluminum halide
JP2502102B2 (ja) オレフイン重合用触媒
Ashby et al. Hydrometallation of 1-octene with grignard reagents. Alkylmagnesiums and alkylmagnesium hydrides catalyzed by dicyclopentadienyltitanium dichloride
CN110511251B (zh) 一种α-二亚胺镍配合物、金属催化剂、支化聚乙烯蜡及其制备方法和应用
Roha et al. Low pressure polyethylene catalysts
CN112778350A (zh) 一类[oonn]四齿第四副族金属配合物、制备方法及用途
Malpass et al. Preparation of organometallic complexes by reduction of magnesium alkyls with alkali metals
US4174429A (en) Process for polymerizing olefins
Mazzei et al. Stereopecific polymerization of isoprene with alano‐derivatives and titanium compounds. III. Catalysts based on poly (N‐alkyliminoalanes) and TiCl4
CN102190678A (zh) 一种改性铝氧烷的制备方法
CN104812487B (zh) 钌基催化剂及其在选择性氢化芳族或多不饱和化合物中的用途
Werber et al. Crystalline titanium dichloride—An active catalyst in ethylene polymerization. I. Catalyst activation
US4452912A (en) Process for producing a supported catalyst for the polymerization of .alpha.
Wong et al. Chromium (III) based Ziegler-Natta catalysts for olefin polymerization

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee