有机化合物现在约有四十万种,其中在工业上有用途的仅占少数。但化学家的努力研究,往往能使一种没有用的变成一种极有用的物质,乙二醛Glyoxal OHC·CHO 即是最近的一个例子。乙二醛自1856年特勃斯H.Debus 发见以后,将近九十年并无重要用途。最近一二年来忽然变为多种工业可以利用的有机化合物,因为牠的性质相当活动,可以替代蚁醛;而牠的制法已经改进,可以减轻成本。乙二醛的制法 There are about 400,000 organic compounds now, of which only a few are of industrial utility. However, hard work by chemists often turns a useless substance into a highly useful substance. Glyoxal OHC-CHO is a recent example. Glyoxal has had no significant use for almost 90 years since its appearance in 1986 by the H. Hubbus. In recent years, it has suddenly become a variety of organic compounds that can be used by many industries. Because of its rather nature, it can replace form aldehyde. Its manufacturing method has been improved to reduce costs. Preparation of glyoxal