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单词 Raney nickel
释义

Raney nickel

英语例句库

Qualified nickelous, sulfate, nickelous nitrate and nikel monoxide were prepared with waste raney nickel catalyst as raw material.

以废雷尼镍催化剂为原料,制备出合格的硫酸镍、硝酸镍和氧化镍。

A new camphol sandaliol was synthetized by selective alkylation of isocamphol and phenol with acidic catalyst, and following hydrogenated in the presence of Raney nickel.

本文用异龙脑与苯酚在酸性催化剂作用下进行选择性烷基化反应,再经催化氢化还原得到龙脑檀香产品。

中文百科

雷尼镍

干燥的活化后的雷尼镍.
镍-铝相图,标出了和浸出反应密切的NiAl3、Ni2Al3和NiAl相
雷尼镍包装,因为其是可燃有害物质,包装盒内填充蛭石

雷尼镍(英语:Raney Nickel)又译兰尼镍,是一种由带有多孔结构的镍铝合金的细小晶粒组成的固态异相催化剂,它最早由美国工程师莫里·雷尼(Murray Raney)在植物油的氢化过程中,作为催化剂而使用。其制备过程是把镍铝合金用浓氢氧化钠溶液处理,在这一过程中,大部分的铝会和氢氧化钠反应而溶解掉,留下了很多大小不一的微孔。这样雷尼镍表面上是细小的灰色粉末,但从微观角度上,粉末中的每个微小颗粒都是一个立体多孔结构,这种多孔结构使得它的表面积大大增加,极大的表面积带来的是很高的催化活性,这就使得雷尼镍作为一种异相催化剂被广泛用于有机合成和工业生产的氢化反应中。由于“雷尼”是格雷斯化学品公司(W. R. Grace and Company)的注册商标,所以严格地说,仅有这个公司的戴维森化学部门(Grace Davison division)生产的产品才能称作“兰尼镍”。而“金属骨架催化剂”或者“海绵-金属催化剂”被用于称呼具有微孔结构,而物理和化学性质类似于雷尼镍的催化剂。

英语百科

Raney nickel 雷尼镍

Light-gray powder on a glass dish
Raney nickel is pyrophoric and must be handled with care. This shipping container is filled with vermiculite to protect the sealed bottle inside.
Phase diagram of the Ni–Al system, showing relevant phases
SEM of Raney nickel catalyst in which crystals of 1-50µm is seen.

Raney nickel /ˈrn ˈnɪkəl/, also called spongy nickel, is a fine-grained solid composed mostly of nickel derived from a nickel-aluminium alloy. A variety of grades are known, but most are gray solids. Some are pyrophoric, most are used as air-stable slurries. Raney nickel is used as a reagent and as a catalyst in organic chemistry. It was developed in 1926 by American engineer Murray Raney for the hydrogenation of vegetable oils.

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更新时间:2025/6/18 6:17:20