Question

Electrolytic refining of aluminium

Answer 1

Answer:

It is a method used to obtain aluminium of very high purity. The metal obtained in the Hall–Héroult process is about 99% pure, and for most purposes it is taken as pure metal. However, further purification of aluminium can be carried out by the Hoopes process. This is an electrolytic process.

In electrolytic refining, the plates of crude metal are anodically dissolved in a suitable electrolyte, while “pure” metal is deposited on the adjacent cathodes. The electrorefining process was introduced about a hundred years ago to produce a substitute to fire-refined copper.

Answer 2

Answer:

ɪᴛ ɪs ᴀ ᴍᴇᴛʜᴏᴅ ᴜsᴇᴅ ᴛᴏ ᴏʙᴛᴀɪɴ ᴀʟᴜᴍɪɴɪᴜᴍ ᴏғ ᴠᴇʀʏ ʜɪɢʜ ᴘᴜʀɪᴛʏ. ᴛʜᴇ ᴍᴇᴛᴀʟ ᴏʙᴛᴀɪɴᴇᴅ ɪɴ ᴛʜᴇ ʜᴀʟʟ–ʜéʀᴏᴜʟᴛ ᴘʀᴏᴄᴇss ɪs ᴀʙᴏᴜᴛ 99% ᴘᴜʀᴇ, ᴀɴᴅ ғᴏʀ ᴍᴏsᴛ ᴘᴜʀᴘᴏsᴇs ɪᴛ ɪs ᴛᴀᴋᴇɴ ᴀs ᴘᴜʀᴇ ᴍᴇᴛᴀʟ. ʜᴏᴡᴇᴠᴇʀ, ғᴜʀᴛʜᴇʀ ᴘᴜʀɪғɪᴄᴀᴛɪᴏɴ ᴏғ ᴀʟᴜᴍɪɴɪᴜᴍ ᴄᴀɴ ʙᴇ ᴄᴀʀʀɪᴇᴅ ᴏᴜᴛ ʙʏ ᴛʜᴇ ʜᴏᴏᴘᴇs ᴘʀᴏᴄᴇss. ᴛʜɪs ɪs ᴀɴ ᴇʟᴇᴄᴛʀᴏʟʏᴛɪᴄ ᴘʀᴏᴄᴇss.

ᴀʟᴜᴍɪɴɪᴜᴍ ᴏʀᴇ ɪs ᴄᴀʟʟᴇᴅ ʙᴀᴜxɪᴛᴇ . ᴛʜᴇ ʙᴀᴜxɪᴛᴇ ɪs ᴘᴜʀɪғɪᴇᴅ ᴛᴏ ᴘʀᴏᴅᴜᴄᴇ ᴀʟᴜᴍɪɴɪᴜᴍ ᴏxɪᴅᴇ, ᴀ ᴡʜɪᴛᴇ ᴘᴏᴡᴅᴇʀ ғʀᴏᴍ ᴡʜɪᴄʜ ᴀʟᴜᴍɪɴɪᴜᴍ ᴄᴀɴ ʙᴇ ᴇxᴛʀᴀᴄᴛᴇᴅ. ᴛʜᴇ ᴇxᴛʀᴀᴄᴛɪᴏɴ ɪs ᴅᴏɴᴇ ʙʏ ᴇʟᴇᴄᴛʀᴏʟʏsɪs. ᴛʜᴇ ɪᴏɴs ɪɴ ᴛʜᴇ ᴀʟᴜᴍɪɴɪᴜᴍ ᴏxɪᴅᴇ ᴍᴜsᴛ ʙᴇ ғʀᴇᴇ ᴛᴏ ᴍᴏᴠᴇ sᴏ ᴛʜᴀᴛ ᴇʟᴇᴄᴛʀɪᴄɪᴛʏ ᴄᴀɴ ᴘᴀss ᴛʜʀᴏᴜɢʜ ɪᴛ.