欧美色亚洲色,欧美日韩国产亚洲成人自拍,中文字幕人妻一区二区在线视频侦探,熟女一区二区少妇

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用途你了解多少?

順丁烯二酸酐的用途你了解多少?

來源:http://m9660.cn/ 日期:2020-08-31 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?。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. It is used in papermaking industry. 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
欧日韩一线性爱| 久久精品亚洲无毛| 99久久国产一区伦理| 中午字幕日本高清| 欧美六区在线| 男生爆操女生91在线观看| 国产精品69久久久久69AV| Av伦理免费网站| 天天做人人操天天做| 涩婷婷亚洲天堂五月天| 国产精品另类sm综合无码| 熟女AV我不卡| 欧美精品性感一区| 国产 欧美 日韩 另类| 亚洲婷婷久久五月天综合| 色哟哟视频按摩在线| 亚洲成人视频在线观看官网| 黄色www99| 日韩人妻免费丝袜一区二区| 日韩区欧美区日韩区欧美区日韩区| 亚州综合AV一区二区| 射欧美视频| 色呦呦网站在线播放视频| 日韩免费码中文AV| 国产午夜人妻| 欧美日韩电影久久一区| 饥渴熟女偷人| 亚洲国产日韩欧美乱码| 中出人妻 在线| 美女十八毛片免费看| 日韩无码美| 国产日韩欧美自拍第一页| 欧美一区二区日本国产| 欧美三级不卡一区二区| 艹B免费网站男的发情.| 欧美同城啪啪| 日本人妻交换电影| 三上悠亚电影一区二区大全| 骚逼被操的狂喷| 精品人妻一区蜜月| 国成人人妻网|