To disenchant an item use your interract key, its basic value is shift
By disenchanting an items you get gold depending on its rarity.
Each rarity has its own disenchanting time and gold received:[ | ]
Disenchanting a Common itme will take you 0.35s and reward with 12 gold.
Disenchanting a Rare item will take you 0.35s and reward with 24 gold.
Disenchanting an Epic item will take you 3s and reward with 36 gold.
Disenchanting a Legendary item will take you 5s and reward with 72 gold.