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发明授权
CN101148383B 由甲醇和二甲醚制取乙烯、丙烯方法 有权

由甲醇和二甲醚制取乙烯、丙烯方法
摘要：
本发明涉及一种由甲醇和二甲醚制取乙烯、丙烯的方法。主要解决以往技术中投资高，能耗大，催化剂再生周期短的技术问题。本发明通过采用以甲醇和二甲醚为原料，乙醇为稀释剂，其中甲醇与二甲醚的重量比为0～100∶100～0，原料与乙醇重量比为1～3∶1，依次包括以下步骤：(a)原料首先与含有氧化铝或分子筛催化剂1接触，生成第一股反应流出物；(b)第一股反应流出物与硅铝摩尔比SiO2/Al2O3至少为10的结晶硅铝酸盐催化剂2接触，生成含有乙烯、丙烯的第二反应流出物，经分离得到乙烯、丙烯产品的技术方案，较好地解决了该问题，可用于制取乙烯、丙烯的工业生产中。
摘要（英）：

The present invention relates to process of preparing ethylene and propylene with methanol and dimethyl ether as main material. The process of preparing ethylene and propylene with methanol and/or dimethyl ether as main material and ethanol as diluent includes the following steps: 1. contacting the material with catalyst containing alumina or molecular sieve to produce the first resultant; and 2.contacting the first resultant with crystalline aluminosilicate catalyst in the SiO2/Al2O3 molar ratio over 10 to produce the second resultant containing ethylene and propylene, and separating out ethylene and propylene. The present invention has low cost, low power consumption and long catalyst service life, and may be applied in industrial production.

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