问题 问答题 简答题

分析甲醇产品水溶性试验不合格的原因有哪些

答案

参考答案:

①粗甲醇中的高级醇或石蜡含量高;

②加压精馏塔或常压精馏塔操作控制回流比过低,使精馏塔内重组分上移,随产品从塔顶出来;

③加压精馏塔再沸器加热蒸汽量过高,造成加压精馏塔或常压精馏塔有雾漠夹带或泛塔;

④预精馏塔烷烃类物质脱出不彻底;

⑤常压精馏塔侧线采出杂醇油量低

综合

读某地区等高线地形图,回答下列问题:(12分)

⑴ 图中A地形区名称为           山脉,它属于          板块(2分)

⑵ 图中B河谷地主要粮食作物为         ,分析该谷地农业生产发展的条件(5分)                                                           

                                                                 

                                                                 

⑶ BC之间的河流峡谷地区降水十分丰富,试简要分析其原因。(2分)

                                                                 

                                                                 

                                                                 

                                                                 

⑷ 青藏铁路的修建对青藏地区经济发展有什么意义?(3分)

                                                                 

                                                                 

                                                                 

                                                                 

 

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