raney nickel sentence in Hindi
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- Care should be taken never to expose Raney nickel to air.
- The isomaltulose is then hydrogenated, using a Raney nickel catalyst.
- Macroscopically, Raney nickel is a finely divided gray powder.
- Raney nickel is typically supplied as a 50 % slurry in water.
- This is now a common alloy composition for modern Raney nickel catalysts.
- Benzene is routinely reduced to cyclohexane using Raney nickel for the production of nylon.
- The reductive agent is hydrogen, and Raney nickel is used as a catalyst.
- Likewise, Raney nickel will remove the sulfur of thiophene to give a saturated alkane.
- Care should be taken when handling these raw materials during laboratory preparation of Raney nickel.
- An alternative way of preparing enantioselective Raney nickel has been devised by surface adsorption of tartaric acid.
- However, this is the preferred alloy composition for production of Raney nickel catalysts currently in use.
- Commercially available Raney nickel has an average Ni surface area of 100 m 2 per gram of catalyst.
- Raney nickel is produced when a block of nickel-aluminium alloy is treated with concentrated sodium hydroxide.
- For this reason, commercial Raney nickel is available in both " active " and " inactive " forms.
- An alternative process operates in diluted ADN conditions using HMD itself as a solvent and Raney Nickel as catalyst.
- This catalyst, now commonly known as Raney nickel, was the subject of a patent he obtained in 1927.
- Raney nickel is notable for being thermally and structurally stable, as well has having a large Teller ) surface area.
- Even after reaction, Raney nickel contains significant amounts of hydrogen gas, and may spontaneously ignite when exposed to air.
- In the presence of Raney nickel, it undergoes dehydrogenation to 2-methylimidazole, which can then be further elaborated.
- "' Raney nickel "'is a solid catalyst composed of fine grains of a nickel-aluminium alloy.
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