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

公司新聞

您現(xiàn)在的位置: 網(wǎng)站首頁>>新聞中心>>公司新聞順酐在制作過程中需要防備事項(xiàng)

順酐在制作過程中需要防備事項(xiàng)

來源:http://bj1866.cn/ 日期:2021-03-18 發(fā)布人: 瀏覽次數(shù):0
通過對(duì)市場(chǎng)的調(diào)查回訪我們發(fā)現(xiàn),很多客戶對(duì)順酐的制備方法還不是了解的很明白,今天小編就將查閱的相關(guān)資料與大家分享一下,希望引起大家的重視,讓大家對(duì)順酐廠家有一個(gè)深層次的了解。這樣大家在購買使用山東順酐時(shí)也能做到心中有數(shù),不怕上當(dāng)受騙,希望對(duì)大家有所啟發(fā)與幫助。
Through the market survey, we found that many customers do not understand the preparation method of maleic anhydride very well. Today, I will share the relevant information with you, hoping to arouse your attention and let you have a deep understanding of maleic anhydride manufacturers. In this way, when you buy and use Shandong maleic anhydride, you can also have a clear idea, and you are not afraid of being cheated. I hope it will inspire and help you.
1. 苯氧化制順酐
1. Oxidation of benzene to maleic anhydride
順酐廠家
將苯與空氣混合(苯為1%-1.4% )經(jīng)換熱器預(yù)熱后,進(jìn)人列管式催化反應(yīng)器。在壓力為0.1-0.2MPa、溫度為350-400℃的反應(yīng)條件下進(jìn)行氧化反應(yīng),所得產(chǎn)物經(jīng)兩臺(tái)換熱器、一臺(tái)冷卻器后,冷卻到接近露點(diǎn)(55―65℃)。冷卻后的反應(yīng)物進(jìn)入分離器,分離器底部得粗順酐,進(jìn)入粗順酐罐。
The mixture of benzene and air (benzene is 1% - 1.4%) is preheated by heat exchanger and then put into tubular catalytic reactor. The oxidation reaction was carried out under the reaction conditions of 0.1-0.2mpa pressure and 350-400 ℃ temperature. The product was cooled to near dew point (55-65 ℃) by two heat exchangers and one cooler. The cooled reactant enters the separator, and crude maleic anhydride is obtained at the bottom of the separator and enters the crude maleic anhydride tank.
分離器頂部流出物進(jìn)人洗滌塔,用水洗滌,塔頂為多余空氣和未反應(yīng)的苯,苯可用吸附回收。洗滌塔塔底水溶液進(jìn)人脫水器,分離出水,所得粗順酐進(jìn)人粗順酐罐。粗順酐進(jìn)一步進(jìn)人蒸餾塔進(jìn)行蒸餾精制,得順酐。所得順酐可進(jìn)行異構(gòu)化得富馬酸和蘋果酸。
The effluent from the top of the separator enters the scrubber and is washed with water. The top of the scrubber contains excess air and unreacted benzene, which can be recovered by adsorption. The water solution at the bottom of the washing tower enters the dehydrator to separate the water, and the obtained crude maleic anhydride enters the crude maleic anhydride tank. The crude maleic anhydride is further put into a distillation tower for distillation and refining to obtain maleic anhydride. The obtained maleic anhydride can be isomerized to give fumaric acid and malic acid.
2.C4餾分部分氧化制順酐
2. Partial oxidation of C4 fraction to maleic anhydride
工業(yè)上用不經(jīng)分離的C4餾分或分離異丁烯和丁二烯后的C4餾分為原料順酐。C4餾分與空氣混合后進(jìn)人流化床氧化反應(yīng)器,在300―500℃溫度下,與反應(yīng)器中的催化劑接觸順酐。氧化反應(yīng)器頂部流出的反應(yīng)生成物進(jìn)人吸收塔,用水作為吸收劑,塔頂氣體經(jīng)廢水。
Maleic anhydride is produced from C4 fraction without separation or C4 fraction after separation of isobutene and butadiene. The mixture of C4 fraction and air was fed into a fluidized bed oxidation reactor to produce maleic anhydride at 300-500 ℃. The reaction product from the top of the oxidation reactor flows into the absorption tower, water is used as the absorbent, and the top gas passes through the waste water.

相關(guān)新聞
欧美粉嫩在线观看| 噜噜噜噜噜噜噜噜噜噜噜色91| 国产精品17久久久久不卡| 69成年人国产网站| 国产91在线刺激孕妇| 曰韩黄色一级视频在线播放| www.国产在线一区二区| 92AV男人天堂| 国产亚洲AV综合人人澡水密桃| 日本6区码久久久久久久| 中日无码精品久久久久久久久久| 在线视频人妻网站| 中文字幕一区欧洲一区| 日韩欧欧美日韩一区| 国产乱码一区二区三区在| 乐昌市| www.91麻豆lk| 久久久欧美乱码| 亚洲欧美疯狂3P| 国产免费欧美日韩在线精品| 国产日韩欧美影院| 操水多B视屏| 久久影视这里只有粘精品视频| 成人欧美色日韩| 站长推荐一二三区欧美| 草草影院国产欧美| 日本韩国欧美一区| 一区二区日韩欧美黄片| 一区二区色吧| 天天日天天干天天操天天干嘛| 国产午夜美女精品自拍| 性色网站一区二区三| 亚洲一区在线视频免费观看| 日韩黄是电影| 日木不卡区二区三区高| 亚洲深喉在线视频| 国产一区 欧美精品| 亚洲自拍偷拍系列1页| 蜜桃92午夜福利视频| 婷婷ab网| 国产日韩国欧在线观看|