二甲基甲酰胺生产工艺

二甲基甲酰胺既然是化学产品,其生产工艺自然是绕不过的话题。目前二甲基甲酰胺主要的工业生产工艺主要包括甲酸酯化二步法、甲醇脱氢二步法、氢氰酸—甲酸法、三氯乙荃与二甲胺合成法、一步法等。随着工艺的进步,二

SAN FRANCISCO - MARCH 2: Recycled plastic bottles are seen at the San Francisco Recycling Center March 2, 2005 in San Francisco, California. Bottled water is the single largest growth area among all beverages, more than doubling over the last decade. Only about 12 percent of plastic bottles, mostly water, were recycled in 2003, according to industry consultant R.W. Beck, Inc. Since most bottled water is consumed away from home where recycling isn't an option, an estimated 40 million bottles a day go into the trash or become litter. (Photo by Justin Sullivan/Getty Images)

甲基甲酰胺的生产难度和成本不断降低,与此同时,产量和纯度不断提高。生产过程中,对环境的污染程度也在不断降低。

甲酸酯化二步法是制取二甲基甲酰胺最早的工艺方法,通过甲酸与甲醇醇化生成甲酸甲酯,再与二甲胺反应生成二甲基甲酰胺和甲醇。

甲醇脱氢二步法的优点是品质高、设备简易、使用方便、成本低、污染少,但生产流程长,经济性差。氢氰酸—甲酸法的回收利用率比较高。

一步法适合大规模生产,但同时对固定设备投入的要求很高。

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