本文選題：NO　切入點：常溫吸附　出處：《大連理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：目前NO作為新型的功能材料,被廣泛應用于化工合成、半導體電子行業(yè)、航天航空等領(lǐng)域,特別是在醫(yī)療和生命科學領(lǐng)域,研究發(fā)現(xiàn)NO幾乎參與了生命體所有的機能活動,通過調(diào)節(jié)人體NO的代謝狀況可以有效治療高血壓、糖尿病、心腦血管疾病、癌癥等疑難雜癥�；どa(chǎn)制備的NO當中含有一些有害雜質(zhì),這些雜質(zhì)的存在將嚴重影響NO在上述高新領(lǐng)域的應用,因此必須想辦法進行除雜純化。NO的合成方法有很多種,本課題選擇以稀硫酸與亞硝酸鈉為原料制備NO,反應生成的氣體經(jīng)初步除雜獲得粗制產(chǎn)品,粗制產(chǎn)品再經(jīng)過深度脫除雜質(zhì)獲得高純的NO產(chǎn)品,重點討論了相關(guān)雜質(zhì)的脫除工藝及具體的工藝參數(shù),主要的研究成果如下：1、本課題選擇以一定濃度稀硫酸與亞硝酸鈉為原料直接發(fā)生氧化還原反應制備NO氣體,該方法產(chǎn)品收率高,且雜質(zhì)含量較低,反應生成的NO氣體經(jīng)堿洗和堿塔干燥過程初步除雜后,可以得到純度達到99%的粗制NO產(chǎn)品。2、粗制NO氣體中的主要雜質(zhì)包括H2O、CO2、N2O、NO2、N2等,分別用露點儀、氣相色譜儀、檢氣管等分析檢測手段來確定雜質(zhì)的含量。3、分別采用硅膠、分子篩常溫吸附,活性炭低溫吸附,反復冷凍抽空等方法對粗制NO氣體深度脫除,取得理想效果。4、考察了分子篩常溫吸附時壓力對NO氣體中雜質(zhì)脫除效果的影響,表明隨著系統(tǒng)壓力的增高,NO中相關(guān)雜質(zhì)含量明顯降低。5、考察了活性炭低溫吸附時溫度、壓力對NO氣體中雜質(zhì)脫除效果的影響,表明隨著溫度的降低,活性炭對NO中相關(guān)雜質(zhì)的吸附效果明顯提高,但當溫度低于-100℃時,很容易造成活性炭吸附器堵塞：隨著壓力的增高,NO中相關(guān)雜質(zhì)含量降低。6、先低溫冷凍抽空再常溫抽空可有效脫除NO中的N2,采用兩級金屬篩網(wǎng)過濾器能有效減少固體顆粒物。
[Abstract]:At present, no, as a new functional material, has been widely used in chemical synthesis, semiconductor electronics, aerospace and other fields, especially in medical and life sciences. It has been found that no is involved in almost all the functional activities of life. By regulating the metabolism of no in human body, we can effectively treat hypertension, diabetes, cardiovascular and cerebrovascular diseases, cancer and other complicated diseases. The presence of these impurities will seriously affect the application of no in the above-mentioned high-tech fields, so there are many kinds of synthetic methods for removing impurities and purifying .NO. In this paper, no was prepared from dilute sulfuric acid and sodium nitrite. The gas produced by the reaction was preliminarily removed to obtain the crude product, and the crude product was further removed to obtain the high purity no product. The main research results are as follows: 1. In this paper, the redox reaction of a certain concentration of dilute sulfuric acid and sodium nitrite is selected to produce no gas directly. The product yield is high, and the impurity content is low. The crude no product with purity of 99% can be obtained after the reaction gas is removed by alkali washing and alkali tower drying process. The main impurities in crude no gas include H _ 2O _ 2CO _ 2N _ 2O _ 2 no _ 2N _ 2, etc. Dew point instrument, gas chromatograph and trachea were used to determine the impurity content. Silica gel, molecular sieve adsorption at room temperature, activated carbon adsorption at low temperature and repeated freeze-out were used to remove crude no gas deeply. The effect of pressure on the removal of impurities in no gas was investigated during adsorption at room temperature. The results showed that the impurity content in no decreased significantly with the increase of system pressure, and the temperature of adsorption at low temperature was investigated. The effect of pressure on the removal efficiency of impurities in no gas shows that the adsorption effect of activated carbon on impurities in no is obviously improved with the decrease of temperature, but when the temperature is lower than -100 鈩，

本文編號：1558491