- 1、本文档共5页,可阅读全部内容。
- 2、原创力文档(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
查看更多
Molecular distillation Profile
Molecular distillation is a distillation method operated in high vacuum, At this time, the mean free path of steam molecules is greater than the distance between evaporation surface and condensation surface, liquid mixtures can be separated because of the difference of evaporation rate of each component in liquid.
Under certain temperature, the lower the pressure, the gas molecule mean free path greater. When the pressure of evaporation space (10-2 ~ 10-4 mmHg) is very low, and evaporation surface is near condensation surface, the vertical distance between them is less than the mean free path of steam molecules , gas molecules can reach condensation surface and condensate without collisions.
The working principle of molecular distillation
Molecular distillation is a special kind of liquid - liquid separation technology, which is different from the traditional distillation separation principle. Separation can be achieved because of the difference of the mean free path of the different molecules. When the liquid mixture flows along the heating plate and is heated, light and heavy liquid molecules escape into the gas phase because of the difference of the mean free path of the light and heavy molecules, the moving distance of the different molecules after escaping from liquid surface. If a condensation plate can be set up properly, the light molecules can reach condensation surface and condensate and be exhausted, the heavy molecules can not reach condensation surface and be exhausted. In this way, the purpose of the separation material is achieved. The difference of pressure between the boiling film and the condensation surface is the driving force whose the steam flows, the small pressure drop will cause the flow of steam. It is required that the distance between boiling surface and condensation surface is very short under the pressure of 1mbar, the stills based on the principle is named short-path distillation device. Still short-ra
您可能关注的文档
- 长沙县20万Nm3d天然气油气母站建设项目环境影响报告表.doc
- [教学]爱岗敬业修师德 身正为范作榜样 爱岗敬业修师德 身正为范作榜样.doc
- 语文版八年级下册语文期中测试卷.doc
- 机库加固改造工程施工组织设计.doc
- 板蓝根药理研究综述【文库论文】.doc
- 【PPT】市场营销~苹果公司的营销策略.ppt
- 引号作用及练习(附答案).doc
- [精品]居住空间中的低碳设计理念.doc
- 数据库系统原理与应用技术 课件 教学PPT 作者 陈漫红 第6章 数据库保护.ppt
- [修订]电子商务相关专业的个人职业生涯规划.doc
- 辽宁省鞍山市(新版)2024小学语文部编版小升初测试(评估卷)完整试卷(含答案).docx
- 辽宁省锦州市(新版)2024小学语文统编版小升初模拟(培优卷)完整试卷(含答案).docx
- 辽宁省辽阳市(新版)2024小学语文苏教版小升初真题(冲刺卷)完整试卷(含答案).docx
- 陕西省商洛市(新版)2024小学语文人教版小升初摸底(预测卷)完整试卷(含答案).docx
- 陕西省安康市(新版)2024小学语文统编版(五四制)小升初测试(提分卷)完整试卷(含答案).docx
- 辽宁省营口市(新版)2024小学语文部编版小升初真题(提分卷)完整试卷(含答案).docx
- 重庆市县(新版)2024小学语文苏教版小升初测试(培优卷)完整试卷(含答案).docx
- 辽宁省铁岭市(新版)2024小学语文苏教版小升初质量检测(冲刺卷)完整试卷(含答案).docx
- 陕西省商洛市(新版)2024小学语文苏教版小升初测试(备考卷)完整试卷(含答案).docx
- 辽宁省葫芦岛市(新版)2024小学语文人教版小升初模拟(培优卷)完整试卷(含答案).docx
最近下载
- 办公用品订购合同范本.docx VIP
- WORD版本刻度尺-A4纸打印可用.doc
- 90nm逻辑产品Peeling缺陷的解决方案.pdf
- 神经系统的分级调节.pptx VIP
- 中建施工总平面布置图设计(69页).pdf
- 2024年公共卫生与预防医学继续教育平台“大学习”活动线上培训栏目考试题库(1392题).docx
- 北师大版(2023)必修第一册 Unit 2 Sports and Fitness单元教学设计.pdf VIP
- 2016-2023年长沙民政职业技术学院高职单招(英语/数学/语文)笔试历年参考题库含答案解析.docx
- 农业经济学-农业资金.ppt VIP
- 齐鲁医学神经系统疾病的辅助检查.ppt VIP
文档评论(0)