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alatin

金虫 (正式写手)

[交流] 【二乙醇胺】 【有效期2008-10-11晚6点】

实验需要用到二乙醇胺,原来以为是液体,可是拿过来一看都已经凝固成固体了,像水结冰了一样,不知道用什么办法能使它重新液化,加热可以么?多少度合适?

请用过的朋友不吝赐教,谢谢了!

[ Last edited by alatin on 2008-10-12 at 09:27 ]

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shench_221

木虫 (正式写手)


alatin(金币+1,VIP+0):感谢!
二乙醇胺
name: Diethanolamine
--------------------------------------------------------------------------------
Synonym

2,2'-Dihydroxydiethylamine
2,2'-Iminodiethanol
2,2'-iminodiethanol; diethylolamine; bis(hydroxyethyl)amine; 2,2'-dihydroxydiethylamine

CAS NO.: 111-42-2
Molecular Formula:  C4H11NO2
Molecular Weight: 105.14
--------------------------------------------------------------------------------
Properties

Deliquescent prisms, mp 28° Usually offered as a viscous liquid. Mild ammoniacal odor. d430 1.0881; d460 1.0693. One U.S. gallon weighs 9.09 lbs at 30° Viscosity at 30° 351.9 cp; at 60° 53.85 cp. bp760 268.8° bp150 217° bp0.01 20° Strong base: pH of 0.1N aq soln: 11.0. nD30 1.4753. Dipole moment 2.81. Flash pt 300°F. Miscible with water, methanol, acetone. Soly at 25°in benzene: 4.2%, in ether: 0.8%, in carbon tetrachloride: <0.1%, in n-heptane: <0.1%. LD50 orally in rats: 12.76 g/kg (Smyth).
Ignition residue (sulfate): max. 0.01%
Refractive index n20/D: 1.474 to 1.479
Purity(GC): min. 99.0%
Water: max. 0.3%
Solubility in Water: to pass test
------------------------------------------------------------------------------
Use

To scrub gases as indicated under ethanolamine. Diethanolamine can be used with cracking gases and coal or oil gases which contain carbonyl sulfide that would react with monoethanolamine. As rubber chemicals intermediate. In the manuf of surface active agents used in textile specialties, herbicides, petr demulsifiers. As emulsifier and dispersing agent in various agricultural chemicals, cosmetics, and pharmaceuticals. In the production of lubricants for the textile industry.
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二乙醇胺熔点为28度,室温下,纯度高的二乙醇胺应为固体,40度以上水浴加热即可溶化;该物质易吸潮,含水量较多时可能为粘稠液体。
别驻足,梦想要不停,追逐!
4楼2008-10-11 12:29:25
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zhengjun1981

木虫 (著名写手)



alatin(金币+1,VIP+0):感谢!
加热没问题,用热水70-80度都没问题
2楼2008-10-11 11:43:46
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supermen

铁杆木虫 (著名写手)


alatin(金币+1,VIP+0):感谢!
可以参考下二乙醇胺的性质:无色粘稠液体。密度1.097。溶点28℃。沸点268.8℃。
3楼2008-10-11 12:16:05
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山核桃

金虫 (正式写手)

★ ★
alatin(金币+2,VIP+0):感谢!
使用时,可以水浴加热一下!
5楼2008-10-11 12:36:01
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