97人人模人人爽人人少妇,一区二区二区无码视频,日韩女优精品,囯产精品第二页

你好,歡迎訪問濟(jì)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(yè)>>新聞中心>>常見問題苯酐的方法及苯酐回收工藝

苯酐的方法及苯酐回收工藝

來源:http://bj1866.cn/ 日期:2022-11-07 發(fā)布人: 瀏覽次數(shù):0
苯酐是重要的化工原料,目前國(guó)內(nèi)外苯酐的方法主要有萘氧化法和鄰二甲苯氧化法,兩種方法在苯酐凈化過程中都有黑褐色精餾殘?jiān)a(chǎn)生。該廢料中含有大量苯酐,同時(shí)含有部分黑色焦油和高聚物,無(wú)法進(jìn)行直接利用。
Phthalic anhydride is an important chemical raw material. At present, naphthalene oxidation and o-xylene oxidation are the main methods to produce phthalic anhydride at home and abroad. Both methods produce dark brown rectification residues in the purification process of phthalic anhydride. The waste contains a large amount of phthalic anhydride, as well as some black tar and polymers, which cannot be directly produced and utilized.
目前有各種回收方法,其中比較多的有溶劑萃取法、升華法和反應(yīng)深加工處理法等。但各種工藝均不能很好的滿足實(shí)際要求。本研究按某廠提出的產(chǎn)品不含焦油、收率高、成本低的要求,采用簡(jiǎn)單合理的回收工藝可回收幾乎廢料中的全部苯酐,產(chǎn)品質(zhì)量好。采用該法處理回收某廠苯酐廢料600噸,可年產(chǎn)粗苯酐近500噸,再結(jié)合工廠的需要將該苯酐返回到苯酐裝置出工業(yè)優(yōu)級(jí)品,不影響苯酐裝置的正常。該技術(shù)可降低苯酐成本,為工廠帶來一定的經(jīng)濟(jì)效益。目前國(guó)內(nèi)苯酐能力估計(jì)為70萬(wàn)噸,按2%計(jì)算可年產(chǎn)廢料1.4萬(wàn)噸,估計(jì)可回收1萬(wàn)多噸苯酐。若該技術(shù)推廣全國(guó)或向國(guó)外轉(zhuǎn)化技術(shù)將具有很好的經(jīng)濟(jì)和社會(huì)效益。該技術(shù)成熟,達(dá)到水平。
At present, there are various recovery methods, among which solvent extraction, sublimation and reaction deep processing are more common. However, various production processes can not meet the actual requirements very well. In this study, according to the requirements of a factory that the product contains no tar, has high yield and low cost, a simple and reasonable recovery process can be used to recover almost all phthalic anhydride in the waste, and the product quality is good. This method is used to treat and recover 600 tons of phthalic anhydride waste from a certain factory, which can produce nearly 500 tons of crude phthalic anhydride annually. Combined with the needs of the factory, the phthalic anhydride is returned to the phthalic anhydride production unit to produce industrial high-grade products, which will not affect the normal production of the phthalic anhydride unit. This technology can reduce the production cost of phthalic anhydride and bring certain economic benefits to the factory. At present, the domestic production capacity of phthalic anhydride is estimated to be 700000 tons. According to 2% calculation, 14000 tons of waste can be produced annually, and it is estimated that more than 10000 tons of phthalic anhydride can be recovered. It will have good economic and social benefits if the technology is popularized nationwide or transferred to foreign countries. The technology is mature and reaches the international advanced level.
以上就是為大家介紹的有關(guān)順酐廠家的詳細(xì)介紹,希望對(duì)您有所幫助.如果您有什么疑問的話,歡迎聯(lián)系我們.我們將以的態(tài)度,為您提供服務(wù)http://bj1866.cn
The above is a detailed introduction of maleic anhydride manufacturers, and I hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional services http://bj1866.cn

相關(guān)新聞
97国产丝袜麻豆| 久久久久久久久久久久国产| 国产精品 欧美 日韩 视频| av在线网络不卡| 91日本精品少妇| 久久99精品久久久九九| 日本少妇传媒电影,| 久久久久久中文字幕在线| 亚太地区一区二区三区视频| 女优伦理一区二区三区四区| 少妇久久久久久久久久久久久000| 免费播放搞B视频| 人妻无码乱交精品| 偷拍视频月本一区二区三区| 久久中文精品免费看| 日日夜夜精品一区二区亚洲| 日韩狠劲射| 久久久产品一区二区三区| 黄色理论久久| 精品人妻无码一区二区三区91电影| 日本 中文字幕 高清 久久| 国产一级黄色网战| 免费国产一区绯色二区欧美情趣| 97香焦超级碰碰| 久久久精品天堂| 97精品褔利| 欧美精品尤物一区二区在线| 青青草久热这里只有精品| 美女少妇有区二区三区| 激情伊人五月天久久综合| 超碰在线亚洲色| 中国精品,日老妓女视频| 国产三区精品视频下载| 国产欧美在线刘玥| 亚洲综合黄色三级网站| 香蕉久久人人爽人人爽人人片av| 99人妻99久久| 中文字幕Av一卡| 互舔b b视频| 日本无码欧美一区二区三区| 91人妻国产成人一区二区三区|