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根据文献,乙醛氯化时除主要生成乙醇外,副反应很多。乙醛可以縮合成乙酸乙酯,或分解成一氧化碳和甲烷,或縮合成醇醛,再脫水、氫化生成丁醇。生成的乙醇也能脫氫成乙醛或脱水成乙烯。在試驗中,我們用Adkins的HJS2催化剂的制法,制得銅鉻催化剂,粒度6—8篩孔。在常压气相試驗了反应温度、氫气的流速和氫气对乙醛的分子比对乙醛氫化的影响。在180℃、氢气空间流速200以下和氫对乙醛的比率在4以上的条件下,得到乙醇收
According to the literature, acetaldehyde chlorination in addition to the main production of ethanol, many side effects. Acetaldehyde can be condensed into ethyl acetate, or decomposed into carbon monoxide and methane, or condensed into alcohol aldehyde, and then dehydrated, hydrogenated to produce butanol. The resulting ethanol can also dehydrogenate to acetaldehyde or dehydrate to ethylene. In the experiment, we use Adkins HJS2 catalyst preparation, copper chromium catalyst, particle size 6-8 mesh. The effect of reaction temperature, the flow rate of hydrogen and the molecular ratio of hydrogen to acetaldehyde on the acetaldehyde hydrogenation was tested in the atmospheric gas phase. Ethanol was obtained at 180 ° C under a hydrogen space flow rate of 200 and at a hydrogen to acetaldehyde ratio of 4 or more