He was attempting to manufacture quinine from aniline, an inexpensive and readily available coal tar wasteproduct.
他试图用苯胺批量制造奎宁,苯胺是一种廉价且容易获得的煤焦油废料。
2
Research has shown that Tanco could reprocess the by-product of potassium chloride use to yield a crop fertilizer, leaving a relatively small volume of waste for disposal.