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在固定床反应器上评价不同种类助剂制备的催化剂活性来筛选较适宜的活性组分组合,通过正交设计优选出无汞催化剂的基础配方,考察了添加0.6%的三氯化钌、氯化钯、氯化银等贵金属活性成分及氯化汞后催化剂的活性情况,并进一步优化三氯化钌、氯化汞质量分数来提高催化剂活性。结果表明:助剂氯化钡较氯化钠、氯化铈更能与氯化亚铜/氯化铋间相互协同催化;活性炭上负载12%Cu Cl、16%Bi Cl3、4%Ba Cl2时制备的催化剂活性最佳,转化率可高达66.4%,继续添加氯化银能提高稳定性,但并不能改善催化剂的活性,添加氯化钯仅能改善反应初期催化剂活性,随着反应进行活性不断降低,而添加三氯化钌及氯化汞后催化剂活性明显提升,质量分数为1%时,平均转化率在72.2%以上,特别是氯化汞的转化率可增加至92%,较未加前增加了27%。
On the fixed bed reactor, the activity of catalyst prepared by different kinds of additives was evaluated to screen the more suitable active components. The basic formula of mercury-free catalyst was optimized by orthogonal design. The effects of adding 0.6% ruthenium trichloride, Palladium, silver chloride and other precious metals active ingredients and mercuric chloride rear catalyst activity, and further optimize the ruthenium trichloride, mercuric chloride mass fraction to improve the catalyst activity. The results showed that the additive barium chloride was more able to co-catalyze with cuprous chloride / bismuth chloride than sodium chloride and cerium chloride. When activated carbon supported 12% CuCl, 16% BiCl3, 4% Ba Cl2 The prepared catalyst has the best activity, and the conversion rate can reach as high as 66.4%. The continued addition of silver chloride can improve the stability but does not improve the activity of the catalyst. The addition of palladium chloride can only improve the activity of the initial reaction catalyst, , While the addition of ruthenium trichloride and mercuric chloride significantly increased the activity of the catalyst. When the mass fraction was 1%, the average conversion was above 72.2%, especially the mercuric chloride conversion could be increased to 92% Before the increase of 27%.