本文選題：氯代異丁腈 + 分子篩�。� 參考：《浙江工業(yè)大學(xué)》2017年碩士論文

【摘要】：寧化公司原料四氯化碳總量約3.5萬噸/年,其中含有氯代異丁腈雜質(zhì)約1-3%。在公司現(xiàn)有產(chǎn)業(yè)鏈布局中,要將甲烷氯化物裝置中副產(chǎn)四氯化碳必須全部轉(zhuǎn)化為四氯乙烯產(chǎn)品,造成四氯乙烯產(chǎn)品中三氯丙烯腈的含量約為0.5-1%左右。四氯乙烯產(chǎn)品中存在三氯丙烯腈雜質(zhì)對用四氯乙烯生產(chǎn)制冷劑HCF125裝置的反應(yīng)催化劑Cr2O3影響非常大,當(dāng)含量超過15 ppm時能造成催化劑中毒,并不可逆。因此HCF125廠商要求此種雜質(zhì)在四氯乙烯產(chǎn)品中的含量小于15 ppm。考慮到從原料四氯化碳分離雜質(zhì)氯代異丁腈比從產(chǎn)品四氯乙烯中去除三氯丙烯腈雜質(zhì)更容易,因此開發(fā)研究出高效、對環(huán)境友好的氯代異丁腈脫除技術(shù)具有很大社會與經(jīng)濟(jì)效益。比較分析現(xiàn)有氯代異丁腈脫除方法存在的弊端,本文提出利用吸附法脫除四氯化碳中氯代異丁腈雜質(zhì)。通過考察不同類型的吸附劑對原料四氯化碳中腈類雜質(zhì)的吸附性能,篩選出具有高選擇性、高吸附容量吸附分離氯代異丁腈雜質(zhì)的吸附劑,并對吸附劑的吸附工藝條件進(jìn)行了優(yōu)化。8#分子篩類吸附劑是一種對氯代異丁腈雜質(zhì)具有良好吸附脫除效果的吸附劑,當(dāng)吸附溫度為60℃和90℃時,均可將原料四氯化碳中的氯代異丁腈脫除至檢測限以下,且四氯化碳的純度明顯提高。隨著吸附溫度與四氯化碳進(jìn)料空速的提高,8#分子篩類吸附劑對氯代異丁腈的吸附脫除效果減弱。8#分子篩類吸附劑的再生過程中,第二階段再生溫度控制在260-280℃左右,其再生性能最佳;且空氣對吸附劑再生性能優(yōu)于氮?dú)狻?#分子篩類吸附劑不管經(jīng)歷多少次吸附與脫附,都能基本恢復(fù)其原有的良好吸附脫除性能。經(jīng)過50次累積實(shí)驗(yàn),每克8#分子篩類吸附劑可以累積處理504克四氯化碳,累積吸附8.62克氯代異丁腈。總之,8#分子篩類吸附劑對氯代異丁腈吸附脫除具有良好效果,在工業(yè)上可以多次、重復(fù)使用。
[Abstract]:The total amount of carbon tetrachloride in Ninghua company is about 35 thousand tons per year, with chloroisobutadiene nitrile impurities containing about 1-3%. in the existing industrial chain layout of the company. The by-product of carbon tetrachloride in the methane chloride device must be converted to four chloroethylene products, and the content of three chloroacrylonitrile in four chloroethylene products is about 0.5-1%. Four chloroethylene The presence of three chloroacrylonitrile impurities in the product has a great influence on the reaction catalyst Cr2O3 for the HCF125 unit with four vinyl chloride production. When the content exceeds 15 ppm, the catalyst is intoxication and is not reversible. Therefore, the HCF125 manufacturer requires that the content of this impurity in the four chloroethylene product is less than 15 ppm., considering the carbon tetrachloride from raw material. The impurity chloroisobutyl nitrile is easier to remove from the four chloroacrylonitrile from the product of the product of chloroacrylonitrile from the product. Therefore, it has great social and economic benefits for the development and study of the environmentally friendly chloroisobutadiene removal technology. The disadvantages of existing chloroisobutyl nitrile removal methods are compared and analyzed. The removal of four chlorination by adsorption method is proposed in this paper. The adsorption properties of nitrile impurities in carbon tetrachloride were investigated by different types of adsorbents. The adsorbents with high selectivity and high adsorption capacity for separation of chloro isobutyl nitrile were screened, and the adsorption process conditions of the adsorbents were optimized by.8# molecular sieve sorbent as a kind of pair of chlorinated agents. Isobutadiene nitrile impurities have good adsorption and removal effect. When the adsorption temperature is 60 and 90, the chloroisobutadiene nitrile in carbon tetrachloride can be removed to the detection limit, and the purity of carbon tetrachloride is obviously improved. With the increase of the adsorption temperature and the air speed of the carbon tetrachloride feed, the 8# molecular sieve adsorbents to chloroisobutadiene nitrile. In the process of regeneration of.8# molecular sieve adsorbents, the second stage regeneration temperature was controlled at about 260-280, and the regeneration performance of the adsorbent was best, and the regeneration performance of air to adsorbents was better than that of nitrogen.8# molecular sieve adsorbents. No matter how many sorbents were experienced and desorption, the good adsorption and removal of adsorbents could be recovered. After 50 cumulative experiments, each 8# molecular sieve adsorbent can accumulate 504 grams of carbon tetrachloride and accumulate 8.62 grams of chloroisobutyl nitrile. In a word, 8# molecular sieve adsorbents have good effect on the adsorption and removal of chloroisobutadiene, and can be repeated and reused in industry.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O647.3;TQ222.423

【相似文獻(xiàn)】

相關(guān)期刊論文 前7條

1 ;天津推出合成異丁腈用新型催化劑[J];湖南化工;2000年02期

2 ;天津推出異丁腈用新型催化劑[J];江蘇化工;1999年05期

3 曹子英;胡敏;;二異丁腈肼溶液中氮的選擇性測定[J];理化檢驗(yàn)(化學(xué)分冊);2014年07期

4 曹子英;;二異丁腈肼水溶液穩(wěn)定性研究[J];科學(xué)咨詢(科技·管理);2014年06期

5 劉智凌,廖文文,王宇,陳平,劉列瓊,宮經(jīng)德;異丁醇?xì)庀啻呋苽洚惗‰鎇J];精細(xì)化工中間體;2001年01期

6 鄭志明;異丁腈合成2-異丙基-4-甲基-6-羥基嘧啶的研究[J];精細(xì)化工中間體;2001年02期

7 李杰;陳玉琴;張奕奕;宮貴貞;張志德;;偶氮異丁腈甲酰胺的合成研究[J];山東化工;2008年02期

相關(guān)碩士學(xué)位論文 前3條

1 黃波;吸附脫除四氯化碳中氯代異丁腈雜質(zhì)技術(shù)研究[D];浙江工業(yè)大學(xué);2017年

2 吳大維;乙炔和四氯化碳的催化加成反應(yīng)研究[D];北京化工大學(xué);2017年

3 馬羅奇（Manoj Hang Limbu）;大鼠肝腎纖維化復(fù)合動物模型的建立及機(jī)制初探[D];東南大學(xué);2017年

，

本文編號：1985671