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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>青海聚氨酯異氰酸酯哪家好,異氰酸酯</p><p><span>***更新：</span>2021-02-05 00:14:55</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="sh9l8hw" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都成英科技有限公司</a></p><p><span>聯(lián)系人：</span>何英</p><p><span>郵箱: </span>cykj789@sina.com</p><p><span>電話: </span>13558781838</p><p><span>傳真: </span>135_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>135-58781838</p><p><span>地址: </span>龍橋鎮(zhèn)山水村3組201號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="icrjgs8" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="aedproq" class="box"><p><p style="text-indent:25px">而隨著社會(huì)對(duì)環(huán)境保護(hù)的關(guān)注，能夠降低有機(jī)揮發(fā)物排放的高性能固化劑，比如水可分散固化劑和低黏度固化劑，將是未來(lái)發(fā)展的重點(diǎn)?；旌闲途郛惽杷狨ス袒瘎┗谄?**的用途，未來(lái)發(fā)展前景樂觀。中企顧問(wèn)網(wǎng)發(fā)布的《2020-2026年中國(guó)聚異氰酸酯行業(yè)發(fā)展趨勢(shì)與投資方向研究報(bào)告》共十四章。首先介紹了聚異氰酸酯相關(guān)概念及發(fā)展環(huán)境，接著分析了中國(guó)聚異氰酸酯規(guī)模及消費(fèi)需求，然后對(duì)中國(guó)聚異氰酸酯市場(chǎng)運(yùn)行態(tài)勢(shì)進(jìn)行了重點(diǎn)分析，青海聚氨酯異氰酸酯哪家好，zui，青海聚氨酯異氰酸酯哪家好.后分析了中國(guó)聚異氰酸酯面臨的機(jī)遇及發(fā)展前景，青海聚氨酯異氰酸酯哪家好。您若想對(duì)中國(guó)聚異氰酸酯有個(gè)系統(tǒng)的了解或者想投資該行業(yè)，本報(bào)告將是您不可或缺的重要工具。異氰酸酯主要用于聚氨酯硬泡沫塑料。青海聚氨酯異氰酸酯哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海聚氨酯異氰酸酯哪家好,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281755567060547/4337758.png"></div><p> 由于光氣劇毒性質(zhì)，對(duì)非光氣合成異氰酸酯方法的摸索一直都沒有停止過(guò)，除上節(jié)描述的羰基法外，尚有許多方法，在此做簡(jiǎn)單介紹。EniChem公司曾介紹了使用碳酸二甲酯代替光氣制備TDI的方法:該法使用2，4-，2，6-二氨基甲苯為基礎(chǔ)原料，使用碳酸二甲酯(DMC)代替劇毒光氣作為親核反應(yīng)中心，當(dāng)DMC的羰基受到親核攻擊時(shí)，?；?氧鍵斷裂生成羰基化合物一一甲苯二氨基甲酸甲酯(TDU)，該中間體經(jīng)提純處理后熱解生成TDI和甲醇:甲苯二胺與過(guò)量的碳酸二甲酯以13:1的比例混合，以醋酸鋅為催化劑，在160~175℃和，獲得TDU中間體，粗TDU在130℃下被溶解在，處理2h后脫除催化劑，然后蒸餾脫除碳酸二甲酯。中間體TDU在低壓和超過(guò)450℃的高溫下進(jìn)行熱解，可獲得TDI產(chǎn)品。海南防火異氰酸酯價(jià)格遇熱分解放出氮氧化物煙氣。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海聚氨酯異氰酸酯哪家好,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281754418398437/9554837.png"></div><p> 羰基化法制備異氰酸酯傳統(tǒng)商業(yè)化生產(chǎn)異氰酸酯的方法都是采用光氣法，但該種生產(chǎn)方法，使用劇毒性光氣，且生產(chǎn)過(guò)程中產(chǎn)生大量HCl，這對(duì)生產(chǎn)的安全操作，尾氣處理、設(shè)備防腐、環(huán)保安全等要求十分嚴(yán)格，生產(chǎn)、維護(hù)成本高昂，生產(chǎn)裝置復(fù)雜，工序多、流程長(zhǎng);同時(shí)，zui終產(chǎn)品中還含有難以分離的可水解氯化物。面對(duì)這些問(wèn)題，人們一直在探索更安全、更簡(jiǎn)便、更經(jīng)濟(jì)的異氰酸酯合成方法，其中羰基合成法具有不使用光氣、產(chǎn)品純度高等優(yōu)點(diǎn)，已成為非光氣法制備異氰酸酯的研究熱點(diǎn)之一。 </p><p style="text-indent:25px">性質(zhì):異氰酸的各種酯的總稱。有一異氰酸酯R-N=C=O和二異氰酸酯O=C=N-R-N=C=O。一般是不愉快氣味的液體。一異氰酸酯易與氨或胺作用而成脲類，易與醇作用而成氨基甲酸酯(如氨基甲酸乙酯)。用途:用于家電、汽車、建筑、鞋業(yè)、家具、膠粘劑等行業(yè);生產(chǎn)方法:一種異氰酸酯，其通過(guò)如下步驟生產(chǎn):a)使氯氣與一氧化碳反應(yīng)生產(chǎn)光氣，b)使光氣與有機(jī)胺反應(yīng)形成異氰酸酯和氯化氫，c)將異氰酸酯和氯化氫分離出來(lái)，d)任選地，純化氯化氫，e)制備氯化氫水溶液，f)任選地，純化氯化氫水溶液，g)使氯化氫水溶液進(jìn)行電化學(xué)氧化形成氯氣，和h)使至少部分步驟(g)中產(chǎn)生的氯氣返回(a)。異氰酸酯生產(chǎn)企業(yè)必須建立嚴(yán)格、完善的安全、健康和環(huán)境保護(hù)管理制度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海聚氨酯異氰酸酯哪家好,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281755466474609/4684362.png"></div><p style="text-indent:25px">目前羰基化法合成異氰酸酯的研究基本有一步法和二步法兩種。一步法的羰基化zui早是由美國(guó)氰胺公司于1963年提出，該法使用硝基苯和CO為原料，在銠系催化劑、三氯化鐵或其他路易斯酸共催化劑作用下，于190℃和約20MPa高壓下反應(yīng)，可獲得收率35％的苯基異氰酸酯。使用二硝基甲苯和CO，在鈀、銠等的氯化物及其絡(luò)合物，鉻、鉬、錳等鹵化物和氧化物存在下，于190～220℃和20～30MPa下反應(yīng)，也可以獲得甲苯二異氰酸酯，收率比較高可達(dá)50％～60％。對(duì)于羰基法，目前研究較多的是二步法工藝，即使用硝基化合物和一氧化碳在醇類化物存在和高溫、高壓下反應(yīng)，首先生產(chǎn)氨基甲酸酯，然后使氨基甲酸酯進(jìn)行熱分解。為滿足國(guó)家節(jié)能、環(huán)保和資源綜合利用要求，實(shí)現(xiàn)合理規(guī)模經(jīng)濟(jì)，規(guī)模必須達(dá)到30萬(wàn)噸/年及以上。青海聚氨酯異氰酸酯哪家好</p><p style="text-indent:25px">尤其不能使用鐵、鋼、鋅、錫、銅或其合金作為盛裝容器。青海聚氨酯異氰酸酯哪家好</p><p style="text-indent:25px">2.非光氣法除光氣化法外,其它合成異氰酸酯的方法都統(tǒng)稱非光氣化法。主要包括羰基法、氨基甲酸酯熱分解法、鹵仿β消去法、氨基甲酸酯陰離子脫水法等。(1)羰化法①一步羰化法：具體反應(yīng)如下,硝基Chemicalbook化合物和一氧化碳反應(yīng),直接生成異氰酸酯:RNO2+3CO→RNCO+2CO2一步法雖然從原理上看zui為合理,但是反應(yīng)條件較為苛刻,尤其是為了保證一氧化碳過(guò)量,反應(yīng)必須在20MPa以上的壓力下進(jìn)行,由此給設(shè)備和工藝控制帶來(lái)了較高的要求。此外,該工藝還要求使用大量的貴金屬(Pd或Rh)以及金屬氧化物分別作為主催化劑和助催化劑,這使得該方法的生產(chǎn)成本**增加,故到目前為止該方法尚未在工業(yè)上得以應(yīng)用。青海聚氨酯異氰酸酯哪家好</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3161696.html</p></div></div></div></div></div><div id="ku88am2" class="page-right twoColRt"><div id="r8y4gdf" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="2ful3ht" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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