The Chinese word for sultana is
葡萄干

pú tao gān

sultana

Chinese Definition

Components
葡萄
1. n. grape
2. v. (Hong Kong Cantonese, neologism, slang) to be jealous; to envy (from (m, zh, 吃不到的葡萄是酸的, t=the grapes are sour anyway, tr=-))
葡
1. Used in 葡萄 (grape) (and related terms.)
2. Short for 葡萄牙, Portugal
3. (chiefly Cantonese by extension in compounds) Macau
4. 葡幣 - Macanese pataca -
5. 葡汁 - Portuguese sauce (a kind of sauce in Macanese cuisine) -
萄
1. a kind of grass
2. Used in 葡萄
干
1. Variant of 乾
2. Simplified form of 幹
3. Variant of 豻
4. Variant of 贛