欧美色亚洲色,天堂A∨在线A,天堂国产成人综合亚洲,伊人成人视屏

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>>常見問題山東順酐的制備方法都有哪些?

山東順酐的制備方法都有哪些?

來源:http://m.m9660.cn/ 日期:2021-09-15 發(fā)布人: 瀏覽次數(shù):0
1.苯氧化成山東順酐
1. Oxidation of benzene to maleic anhydride
加熱到管狀催化反應(yīng)器后,苯通過熱交換器與空氣(苯為1%-1.4%)混合。氧化反應(yīng)在0.1-0.2MPa壓力和350-400℃溫度的反應(yīng)條件下進行。產(chǎn)生的產(chǎn)品通過兩個熱交換器和一個冷卻器,冷卻到露點附近(55-65℃)。
After heating to the tubular catalytic reactor, benzene is mixed with air (benzene is 1% - 1.4%) through the heat exchanger. The oxidation reaction was carried out under the reaction conditions of 0.1-0.2mpa pressure and 350-400 ℃. The resulting product is cooled near the dew point (55-65 ℃) through two heat exchangers and a cooler.
冷卻反應(yīng)物進入分離器,分離器底部得到粗馬來酸酐并進入粗順酐槽。分離器的頂部流出物被送入洗滌塔并用水洗滌??諝忭敳亢臀捶磻?yīng)的苯可以通過吸附回收。洗滌塔底部的水溶液被送入脫水器,水被分離,產(chǎn)生的順酐被送入粗馬來酸酐罐。粗馬來酸酐進一步進入蒸餾塔進行蒸餾和精煉,以獲得順酐。由此產(chǎn)生的山東順酐可以異構(gòu)化得到富馬酸和蘋果酸。
The cooled reactant enters the separator, the crude maleic anhydride is obtained at the bottom of the separator and enters the crude maleic anhydride tank. The top effluent of the separator is sent to the scrubber and washed with water. Air top and unreacted benzene can be recovered by adsorption. The aqueous solution at the bottom of the scrubber is sent to the dehydrator, the water is separated, and the generated maleic anhydride is sent to the crude maleic anhydride tank. Crude maleic anhydride further enters the distillation tower for distillation and refining to obtain maleic anhydride. The resulting Shandong maleic anhydride can be isomerized to fumaric acid and malic acid.
2.C4部分氧化成順酐
2. Partial oxidation of C4 to maleic anhydride
順酐的工業(yè),使用不分離的C4部分或異丁烯和丁二烯分離后的C4部分作為原料。C4餾分與空氣混合,然后送入人流化床氧化反應(yīng)器,并在300-500℃的溫度下與反應(yīng)器中的催化劑接觸,產(chǎn)生馬來酸酐。氧化反應(yīng)器頂部的反應(yīng)產(chǎn)物進入吸收塔,水作為吸收劑,頂部氣體通過廢水。
For the industrial production of maleic anhydride, the non separated C4 part or the C4 part after the separation of isobutene and butadiene is used as raw material. C4 fraction is mixed with air, then sent to the fluidized bed oxidation reactor, and contacted with the catalyst in the reactor at the temperature of 300-500 ℃ to produce maleic anhydride. The reaction products at the top of the oxidation reactor enter the absorption tower, water is used as absorbent, and the top gas passes through the wastewater.

相關(guān)新聞
逼逼免费观看视频| 大香蕉在线观看95| 麻豆视频一区二区视频| 欧美精品另类综合| 欧美视频狠狠| 亚洲综合天天插天天干| 亚洲日本中文久久| 久热Aⅴ| 欧美日韩一区二区HD| 天高清看av| 999网站毛片| 夫妻在线视频一区二区| 国产区、欧美区、日韩区、| 尤物二区中文字幕| 尤物看片1738| 天天槽夜夜槽天天槽| 天天日天天射天天操天天插| 夜精品A一区二区三区| 日本淫秽在线观看| 欧美调教网站| 国产高清黄色一级网站| 无码9999无码午夜| 亚洲狠狠综合一二| 老司机社区一区二区| 国产精品122区| 麻豆产精国品免费2004| 成人黄网站 免费欧美| 日韩少妇av在线一区二区| 欧美激情免费色| 国产麻豆91蜜臀| 色色AV总站| 精品国产99国产精品| 国产2区| 在线中文不卡免费AV| 欧美一区=区三区在线观看| 啪啪啪精品啪啪一区| 日韩潮欧美在线| 日韩骚道| 香蕉视频黄色片A级黄色片 | 欧美日韩亚洲专区| 99人妻555|