欧美1314免费大片,日韩精品一区日韩在线,久久人人妻人人做人人爽,亚欧美一区二区三区

你好,歡迎訪問濟南金昊化工有限公司!

專注品質(zhì),信賴服務(wù)

我們用心做產(chǎn)品服務(wù)

咨詢熱線:

13655318786

常見問題

您現(xiàn)在的位置: 網(wǎng)站首頁>>新聞中心>>常見問題影響苯酐質(zhì)量的雜質(zhì)有哪些

影響苯酐質(zhì)量的雜質(zhì)有哪些

來源:http://www.myxshdh.cn/ 日期:2020-06-02 發(fā)布人: 瀏覽次數(shù):0
  在實際操作過程中,鄰苯二甲酸酐氣體冷凝蒸餾過程中,可有效去除馬來酸酐、檸檬酸酐、苯、鄰二甲苯、苯甲酸、鄰甲苯酸等雜質(zhì)。在催化劑使用初期,蒽醌及其同系物等重雜質(zhì)較少。蒸餾后可以減少到可以接受的水平(但是后期用于催化劑、催化劑性能差,很難單獨的四氯苯酞進一步增加一代,代蒽醌及其同系物和其他重型說,通過蒸餾不能徹底,影響鄰苯二甲酸酐產(chǎn)品融化顏色數(shù)量和顏色將增加的熱穩(wěn)定性。酞本身是無色“即使添加量高達0.5%),但對熱穩(wěn)定性的影響的顏色數(shù)量大得多(這表明,本質(zhì)上是不穩(wěn)定的,容易轉(zhuǎn)換成顯色物質(zhì),鄰苯二甲酸酐的顏色數(shù)量,特別是熱穩(wěn)定性的顏色數(shù)量大幅增加。
順酐廠家
  In the actual operation process, the impurities such as maleic anhydride, citric anhydride, benzene, o-xylene, benzoic acid and o-toluic acid can be effectively removed in the process of condensation distillation of o-phthalic anhydride. In the early stage of catalyst use, anthraquinone and its homologues have less heavy impurities. After distillation, it can be reduced to an acceptable level (but in the later stage, it is difficult to increase the generation of Tetrachlorobenzene phthalein alone due to poor performance of catalyst and catalyst. Anthraquinone and its homologues and other heavy-duty theories cannot be completely removed by distillation, which will affect the quantity and thermal stability of the melting color of phthalic anhydride products. Phthalide itself is colorless "even if the amount of addition is as high as 0.5%), but the number of colors that affect the thermal stability is much larger (this shows that it is unstable in nature, easy to convert into chromogenic substances, and the number of colors of phthalic anhydride, especially the number of colors that are thermally stable, increases significantly.
  因為酞和鄰苯二甲酸酐是很難有效和完全獨立的,所以在實際業(yè)務(wù)流程盡可能地控制酞,確保鄰苯二甲酸酐的質(zhì)量是非常重要的,當然,高性能催化劑的使用可以減少酞“高負載的催化劑的使用可以提高設(shè)備的操作能力。但是,隨著裝置的運行,高性能催化劑的活性會慢慢降低,同時鄰苯二甲酸的產(chǎn)生量也會相應(yīng)增加(反應(yīng)溫度升高后,生成的鄰苯二甲酸會進一步被氧化)。在催化劑活性大幅度降低之前,通過降低裝置的負荷和運行能力,也可以保證鄰苯二甲酸酐的質(zhì)量。在催化劑使用的后期,當鄰苯二甲酸和重雜質(zhì)蒽醌及其同系物的產(chǎn)量增加到一定程度時,需要更換催化劑以保證鄰苯二甲酸酐的質(zhì)量。
  Because phthalic acid and phthalic anhydride are difficult to be effective and completely independent, it is very important to control the production of phthalic acid as much as possible in the actual business process to ensure the quality of phthalic anhydride. Of course, the use of high-performance catalyst can reduce the use of catalyst with high load for the production of phthalic acid, which can improve the operation capacity of the equipment. However, with the operation of the unit, the activity of the high-performance catalyst will slowly reduce, and the amount of phthalic acid produced will also increase correspondingly (after the reaction temperature increases, the phthalic acid produced will be further oxidized). Two kinds of two kinds of catalysts will be used in the production of phthalic acid. The quality of phthalic anhydride can also be guaranteed by reducing the load and operation capacity of the unit before the catalyst activity is greatly reduced. When the output of phthalic acid, anthraquinone and their homologues increases to a certain extent, the catalyst needs to be replaced to ensure the quality of phthalic anhydride.
  以上是順酐廠家小編為大家介紹的相關(guān)內(nèi)容,想要了解更多內(nèi)容,歡迎訪問網(wǎng)站:http://www.myxshdh.cn
  The above is the relevant content introduced by maleic anhydride manufacturer. If you want to know more, please visit the website: http://www.myxshdh.cn

相關(guān)新聞
亚洲视频一区二区三区免费-国产一级黄色大片在线| 欧美一级一线在线观看-亚洲一区二区亚洲三区| 国产午夜精品理论片A级漫画-久久精品国产99亚洲精品| 在线成色中文综合网站-国产二区精品视频在线观看| av一区免费在线观看-中文字幕日韩国产精品视频| 午夜福利院免费在线观看-久久精品日产第一区二区三区画质| 日韩亚洲一区二区三区av-欧美综合在线观看一区二区三区| 久久夜色精品亚洲噜国产av-大香蕉伊人猫咪在线观看| 丝袜高跟熟女视频国产-熟女少妇亚洲一区二区| 91精品国产影片一区二区三区-欧美精品久久久精品一区二区| 黑丝av少妇精品久久久久久久-中文字幕久久久人妻无码| 亚洲一区二区三在线观看-国产精品亚洲а∨天堂123| 成人免费黄色在线网站-日韩精品一区二区三区四区在线| 亚洲综合久久综合激情-日韩欧美精品人妻二区少妇| 交换朋友的妻子中文字幕-日本美女8x8x8x8| 一区二区三区国产高清mm-美女张开腿让帅哥桶爽| 欧美日韩精品人妻在线-在线播放中文字幕一区| 日韩精品一区二区三区十八-日韩人妻少妇一区二区三区| 亚洲欧美激情自拍色图-国产亚洲精品sese在线播放| 国产在线不卡高清一区-日本一区二区三区四区无卡| 国产精品熟女视频一区二区-国产日韩精品欧美一区喷水| 日韩精品一区二区三区十八-日韩人妻少妇一区二区三区| 精品老熟妇一区二区三区-日韩丰满一区二区三区| 国产一区二区三区四区五区麻豆-欧美一级在线视频播放| 国产一级片久久免费看同-麻豆精品尤物一区二区青青| 青青操大香蕉在线播放-国产亚洲欧美精品在线观看| 日韩二级视频在线观看-美女扒开奶罩露出奶子的视频网站| 精品少妇一区二区18-一区二区三区日韩在线播放| 久久免费观看归女高潮特黄-黄色av一本二本在线观看| 亚洲av乱码一区二区-九九免费在线观看视频| 国产欧美日本不卡精美视频-日本后入视频在线观看| 国产小黄片高清在线观看-涩涩鲁精品亚洲一区二区| 日韩毛片在线免费人视频-超碰中文字幕av在线| 日韩精品一区二区三区粉嫩av-欧美亚洲国产中文字幕| 国产综合日韩激情在线-日韩精品人妻一专区二区三区| 久久人妻一区二区三区欧美-国内不卡的一区二区三区| 欧美黄色三级视频网站-国产九九热视频在线观看| sobo欧美在线视频-免费av网址一区二区| 狠狠狠狠爱精品一二三四区-l舌熟女av国产精品| 三级a级一级大片在线观看-日韩av有码免费观看| 久久精品亚洲无中文东京热-日本妹子内谢视频一区|