ประโยคภาษาจีน : 中文句子 |
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duì běn èr fēn 对苯二酚 hé 和 jiǎ chún 甲醇 zài 在 nóng 浓 liú suān 硫酸 hé 和 duì běn kūn 对苯醌 cuī huà 催化 xià 下 zhì 制 dé 得 jiǎ yǎng jī 甲氧基 fēn 酚 chǎn 产 lǜ 率 wèi 为 |
In this work, the 4-methoxyphenol was prepared from hydroquinone, methanol which were catalyzed by benzoquinone and concentrated sulphuric acid. The yield of 4-methoxyphenol was 80%. |