以下为句子列表：
英文: nitro-4-methysulfonyl benzoic acid is synthesized from 4-methysulfonyl toluene by nitration and oxygenation, using sodium dichromate as an oxidizing agent.
中文: 本研究以对甲砜基苯甲酸为原料,经硝化、重铬酸钠氧化,制得2硝基4甲砜基苯甲酸,两步反应总收率达80%,产品纯度≥99%。
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英文: The results show that chrome waste can be utilized to pickle the soft pelt to tan the pickled pelt as well as the second ply leather by adding appropriate amount of fresh chrome liquor, in this way, 0％ and 0％ sodium dichromate can be saved respectively.
中文: 实践表明,废铬液用于软化裸皮浸酸、浸酸裸皮初鞣和在废铬液中补充适量的新化铬鞣液用于鞣制二层皮,均取得了较好的效果,可分别节约红矾钠％和0％。
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