中英文转换器

Through the research to the brown rice in the variety for the pigment existence form and the constitution research, had discovered 4 kind of brown rice variety past, respectively is: High mallow element (FI), pelargonium 3,5 12 glucose past (FZ), a cornflower element 3 glucose past (said) and a cornflower element 3,5- two glucose past (F4), these 4 kind of brown rice variety past has much the common benzoin and adjoins nan after the base substitution structure, forms the model C6 C3 C6 three links altogether to clutch the system. Because altogether clutches the effect, on oxygen atom unpaired electron far away oxygen atom, nearness benzene ring, thus the weakening oxyhydrogen key, enhanced the phenol after the base on hydrogen atom activeness, the easy dehydrogenation to become the hydrogen donator .4 kind of members to have two the difference, one is besides the high mallow element for the past Yuan, other 3 kinds all form the variety past with the glucose; Two is 4 kind of variety pasts is different after the base number and the position, thus we come to the brown rice pigment physics and chemistry nature, the brown rice for medicinal purposes physiology function, thus will obtain the next brown rice variety glucoside the research direction.

本设计任务书为生产年产1万吨丙烯的精馏装置工艺设计，采用板式精馏塔，常压，泡点进料。将原料经预热器预热至泡点温度后送入精馏塔内。塔顶上升蒸汽采用全凝器冷凝，冷凝液在泡点下一部分回流至塔内，其余部分经产品冷凝器冷却后送入储罐。该物系属于易分离物系。
本设计重点介绍了丙烯-精馏装置工艺设计的基本原理，主塔的物料蘅算，工艺流程，塔内结够的计算以及部分设备的确定。
设计过程中，注意理论与实际相结合，实出国内市场中丙烯在生产和生活中的地位，及现代先进的科技技术。

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