91丨九色丨高潮丰满,亚洲av片一区二区三区,日韩精品一区二区三区中文不卡,中文人妻无码一区二区三区

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

行業(yè)新聞

您現(xiàn)在的位置: 網(wǎng)站首頁>>新聞中心>>行業(yè)新聞順丁烯二酸酐的制備方法

順丁烯二酸酐的制備方法

來源:http://91baiyin.cn/ 日期:2021-01-22 發(fā)布人: 瀏覽次數(shù):0
順丁烯二酸酐又名馬來酸酐或失水蘋果酸酐,常簡稱順酐。無色結(jié)晶,有強(qiáng)烈刺激氣味,凝固點(diǎn)52.8℃,沸點(diǎn)202℃,易升華。主要由苯或碳四餾分中的正丁烷或丁烯氧化而制得,是不飽和聚酯及有機(jī)合成的原料。
Maleic anhydride, also known as maleic anhydride or dehydrated malic anhydride, is often referred to as maleic anhydride. Colorless crystal, strong pungent smell, freezing point 52.8 ℃, boiling point 202 ℃, easy sublimation. It is mainly prepared by oxidation of n-butane or butene in benzene or C4 fraction. It is the raw material for the production of unsaturated polyester and organic synthesis.
順酐的主要方法有苯氧化法、丁烯氧化法和正丁烷氧化法,但仍以苯氧化法為主。1.苯氧化法苯在V-Mo-P系催化劑作用下,在固定床中發(fā)生氧化反應(yīng),生成順丁烯二酸酐,反應(yīng)溫度為365℃(反應(yīng)床層也可用沸騰床,但消耗高)。然后用水吸收生成順丁烯二酸,再經(jīng)共沸脫水和精餾,刮片得到成品。2.丁烷(或丁烯)氧化法丁烷(或丁烯)在V-Mo催化劑作用下,經(jīng)空氣或氧氣氧化生成順酐,反應(yīng)溫度350-400℃。然后再經(jīng)水吸收,脫水和精制得到成品。
The main production methods of maleic anhydride include benzene oxidation, butene oxidation and n-butane oxidation, but benzene oxidation is still the main method. 1. Benzene is oxidized to maleic anhydride in fixed bed under the action of v-mo-p catalyst. The reaction temperature is 365 ℃ (the reaction bed can also be fluidized bed, but the consumption is high). Then, maleic acid is absorbed with water to form maleic acid, which is then dehydrated by azeotrope, rectified and scraped to obtain the finished product. 2. Butane (or butene) oxidation method butane (or butene) is oxidized to maleic anhydride by air or oxygen in the presence of v-mo catalyst, and the reaction temperature is 350-400 ℃. Then the product is obtained by water absorption, dehydration and refining.
順丁烯二酸酐的用途
Application of maleic anhydride
塑料工業(yè)用于制造增塑劑。造紙工業(yè)用于制造紙張?zhí)幚韯?。合成樹脂工業(yè)用于制造不飽和聚酯樹脂、醇酸樹脂等。涂料工業(yè)用于制造絕緣漆、白磁漆、烘漆、清漆等。農(nóng)藥工業(yè)用于制造農(nóng)藥馬拉松和低毒農(nóng)藥4049等。醫(yī)藥工業(yè)用于制造長效磺胺藥。油脂工業(yè)用作脂肪、油的防腐劑。有機(jī)工業(yè)用于制造富馬酸及四氫呋喃等。分析化學(xué)中用作化學(xué)試劑。
The plastics industry is used to make plasticizers. The paper industry is used to make paper treatment agents. Synthetic resin industry is used to manufacture unsaturated polyester resin, alkyd resin, etc. The coating industry is used to manufacture insulating paint, white enamel, baking paint, varnish, etc. The pesticide industry is used to manufacture pesticide marathon and 4049, etc. The pharmaceutical industry is used to manufacture long-acting sulfonamides. Oil industry is used as preservative of fat and oil. The organic industry is used to produce fumaric acid and tetrahydrofuran. Used as a chemical reagent in analytical chemistry.

相關(guān)新聞
久久精品国产一区二区三区不卡 | 美女操逼男寄吧| 中国熟女一本区二区| 欧美激情图| 开心成人网激情| 国产日韩最新在线| www.国产成人自拍av91.com| 鸡巴不卡逼视频| 男人的天堂AV线| 久不卡在线日的| 土默特右旗| 中国精品女村女人操逼| 欧美日本黄色免费观看| 久久久中文字幕在线观看| 欧美日韩午夜国产福利| 亚洲欧美日韩国产另类毛片| 在线观看欧美后入| 舔舔二区| 舔美女逼的视频一区二区 | 中文字幕在线观看一区永久| 看看美女野外操逼| 天天舔天天奸天天插| 91人妻,人人操| 欧美成人深夜| 非州大黑吊插日本嫩逼| 嗯同在线观看成人视频| 中文人妻诱惑| 不要嗯嗯在线| 日本亚洲在线伦理| 超碰青青青青青青青| 99久久婷婷国内精品2021婷婷| 黄色小说免费看日韩一级片| 午夜激情视频福利 | 欧美日韩国产h在线| 激情av色综合| 亚洲日韩性爱激情| 国产精品成人AV1237区| 911啪啪视频| 人人操人人人人人人人操| 首页欧美国产在线观看| 人妻综合干|