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Removal of thiophenes from aromatic hydrocarbons by means of condensation in the presence of acid catalysts

机译：在酸催化剂的存在下通过缩合从芳烃中除去噻吩

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摘要

The method of removal of thiophenes from aromatic hydrocarbons by means of condensation of thiophenes with formaldehyde catalyzed by different acids was investigated.Formic acid,acetic acid,Amberlyst-15,and H-P zeolite were used as the catalysts and their performances for thiophenes removal were compared.The aqueous formaldehyde and paraformaldehyde were used as the sources of formaldehyde.The results revealed that,under the catalysis of formic acid,the thiophenes can be converted to the compounds with higher boiling temperature efficiently and the formed products can be removed readily via fractional distillation without aromatic hydrocarbons losses.The effects of various operation conditions using formic acid as the catalyst were also studied.The condensation experiments were carried out to remove dibenzothiophenes from aromatic hydrocarbons and the results showed this method was not applicable to the elimination of dibenzothiophenes in aromatic hydrocarbons.
机译：研究了不同酸催化下噻吩与甲醛的缩合反应，从芳香烃中脱除噻吩的方法。以甲酸，乙酸，Amberlyst-15和HP沸石为催化剂，比较了它们的脱噻吩性能。结果表明，在甲酸的催化下，噻吩可以高效地转化为沸点较高的化合物，并且通过分馏可以很容易地除去所形成的产物。还研究了以甲酸为催化剂的各种操作条件的影响。进行了缩合反应去除芳烃中的二苯并噻吩，结果表明该方法不适用于芳烃中二苯并噻吩的去除。 。

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