離子液體在輕質烯烴雙聚合反應上之應用

IFP公司開發之Dimereol製程，使用可溶於油料中含鎳金屬錯合物觸媒以及烷基氯化鋁助觸媒於液相情況下進行烯經雙聚合反應，轉化率及雙聚合物選擇性分別為80%及85%。由於烯經轉化率與進料中正丁烯之初濃度有很大關聯性，同時需要較大反應設備來進行聚合反應及氨洗、碱洗、水洗等觸媒移除過程，增加投資成本及操作費用，因此IFP公司再開發Difasol製程，使用與Dimersol相同之觸媒系統，以酸性氯化鋁酸鹽離子液體為鎳觸媒之溶劑，成為兩不互溶液相之催化反應系統，產物與觸媒分開在不同液相中，如此使觸媒更有效利用，轉化率在70～80%之間，雙聚合物選擇性可達90～95%，同時轉化率與進料中丁烯之初濃度無太大關聯性。如能將Dimersol與Difasol技術結合，則可得到81%轉化率及92%雙聚合選擇性，而Dimersol技術更可以將Difasol進料之雜質先行去除，以免累積在離子液體中。

關鍵字

Dimersol製程； Difasol製程；離子液體；氯化鋁酸鹽溶液；烯烴雙聚合；鎳金屬錯合物；烷基氯化鋁；三氯化鋁；丙烯；丁烯；辛烯

並列摘要

The Dimersol Process developed by IFP in 1970, employs a soluble nickel complex and an aluminum-based compound to oligomerize light olefins in the liquid phase with 80% conversion and 85% dimer selectivity (Dimersol X). The conversion level is highly dependent on the initial concentration of n-butene in the Dimersol feedstock, also with higher capital expense (CAPEX) and operation expense (OPEX). Therefore, the Difasol Process was developed in 1990 for the improvement of Dimersol Process. The Difasol Process using the same nickel-based catalyst dissolved in the acidic chloroaluminate ionic liquid is carried out in the biphasic system to ensure more efficient catalyst utilization and reduces both residue production and operation cost. The dimer selectivity is high, in the range of 90-95%. The butene conversion of 70-80% are easily achieved in a single step even with diluted feedstocks. The Difasol reactor is ideally integrated as a finishing reaction section after a Dimersol Process, giving a global 81% conversion and 92% dimer selectivity. The impurity of Difasol Process could be removed by the Dimersol Process.

並列關鍵字

Dimersol Process ； Difasol Process ； Ionic Liquid ； Chloroaluminate Solution ； Olefin Dimerzation ； Nickel Organometallic Complex ； Alkylaluminum Chloride ； Aluminum Chloride ； Propene ； Butene ； Octene

國際替代計量

離子液體在輕質烯烴雙聚合反應上之應用

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