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及用途

順丁烯二酸酐的制備方法及用途

來源:http://bj1866.cn/ 日期:2020-11-25 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,有強烈刺激氣味,凝固點52.8℃,沸點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 to sublimate. It is mainly prepared by oxidation of n-butane or butene in benzene or C4 fraction. It is a raw material for the production of unsaturated polyester and organic synthesis.
順丁烯二酸酐的制備方法
Preparation of maleic anhydride
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 oxidation reaction of benzene in the presence of v-mo-p catalyst in a fixed bed to produce maleic anhydride at 365 ℃ (the reaction bed layer can also be used in boiling bed, but the consumption is high). Then, maleic acid is formed by absorption with water, and then the product is obtained by azeotropic dehydration and distillation. 2. Butane (or butene) oxidation method butane (or butene) is oxidized by air or oxygen in the presence of v-mo catalyst, and the reaction temperature is 350-400 ℃. Then the product is absorbed by water, dehydrated and refined.
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:铣蓸渲I(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 and so on. The coating industry is used to manufacture insulating paint, white enamel, baking paint, varnish, etc. 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. Organic industry is used to produce fumaric acid and tetrahydrofuran. Used as a chemical reagent in analytical chemistry.

相關(guān)新聞
3p夫妻一区二区| 我美女日B| 欧美黑人三级不卡中文字幕| 大香蕉久久伊人一本√U| 大色桃AV| 国产欧美一区二区xxx| 婷婷一区二区三区视频| 国产精品在线欧美| 熟女,中文字幕| 蜜臀中文字幕日韩有码| 视频一区四区| 人妻在线播放不卡| 99av在线不卡| 亚洲毛片久久久 乱爱| 亚洲午夜无限久久久| 后入小穴视频在线看| 宝具综合网站一区二区| 久久狠狠亚洲| 亚洲图一二| 色偷婷久久久久ttt| 日韩视频图片一区 二区| 欧美成人在线视频之日韩| 5月10草逼视频| 国产精品视频16p| 欧美的人妻久久熟妇| 国产超碰AV制服丝袜| 欧美色图亚洲色图校园春色另类图片| 五月天日韩av| 国产女人高潮免费潮视频在线观看| 久久人人天天人人| 欧美日韩一道免费播放| 国无码一区二区| 中文字幕一区二区三区www.| 啪在线网站| 成人网站大香蕉视频| 97超级碰碰碰视频| 五月婷婷一区二| 欧美国产在线视频| 青青草AV在线网| 午夜福利无码成人| 加勒比人妻|