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src="https://tyunfile.71360.com/UploadFile/cdcykj/637281754418398437/9554837.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="eyuicwi" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>巴中異氰酸酯供應(yīng)商,異氰酸酯</p><p><span>***更新：</span>2021-01-18 00:15:31</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="smqmmqu" 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: </span>135-58781838</p><p><span>地址: </span>龍橋鎮(zhèn)山水村3組201號</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="oymqmg0" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ac0mcei" class="box"><p><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，巴中異氰酸酯供應(yīng)商，然后使氨基甲酸酯進(jìn)行熱分解，巴中異氰酸酯供應(yīng)商。容易與包含有活潑氫原子的化合物: 胺，巴中異氰酸酯供應(yīng)商、水、醇、酸、堿發(fā)生反應(yīng)。巴中異氰酸酯供應(yīng)商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="巴中異氰酸酯供應(yīng)商,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281754418398437/9554837.png"></div><p> 3-氯-4-甲基苯基異氰酸酯主要用于制備綠麥隆等；對-三氟甲基苯基異氰酸酯主要用于制備對氟??；3-三氟甲基苯基異氰酸酯主要用于制備伏草??；3-氯-4-甲氧基苯基異氰酸酯主要用于制備甲氧隆等；對異丙基苯基異氰酸酯主要用于制備異丙隆等；對溴苯基異氰酸酯主要用于制備秀谷隆等；對硝基苯基異氰酸酯主要用于制備滅鼠胺、滅鼠優(yōu)等；4-(對氯苯氧基)一苯基異氰酸主要用于制備枯草隆；4一(對甲氧基苯氧基)一苯基異氰酸酯主要用于制備枯芳隆；陜西船舶異氰酸酯涂層材料異氰酸酯主要用于合成橡膠。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="巴中異氰酸酯供應(yīng)商,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281755466474609/4684362.png"></div><p> .光氣法按生產(chǎn)工藝條件來分,光氣法可分為液相光氣法和氣相光氣法。(1)液相光氣法①液相成鹽光氣化法：胺類首先與HCl或CO2氣體形成相應(yīng)的鹽酸鹽或碳酸鹽,然后再與液相光氣反應(yīng)得到異氰酸酯。該技術(shù)的使用可在溫和的條件下(甚至是室溫)制得異氰酸酯,同時反應(yīng)收率較高,但缺點是反應(yīng)時間長、所需溶劑量大、副產(chǎn)物多且難于分離。②液相直接光氣法：主要用于反應(yīng)活性低、沸點高、不易汽化的胺類化合物與光氣發(fā)生反應(yīng),是TDI、MDI等主流異氰酸酯產(chǎn)品所廣. </p><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)過程中產(chǎn)生大量HCl，這對生產(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;同時，zui終產(chǎn)品中還含有難以分離的可水解氯化物。面對這些問題，人們一直在探索更安全、更簡便、更經(jīng)濟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，已成為非光氣法制備異氰酸酯的研究熱點之一。吸入后刺激呼吸系統(tǒng), 引起干咳、喉痛。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="巴中異氰酸酯供應(yīng)商,異氰酸酯" src="https://tyunfile.71360.com/UploadFile/cdcykj/637281755141914062/2919879.png"></div><p style="text-indent:25px">合成:用伯胺與二硫化碳在堿性條件下發(fā)生加成，生成二硫代氨基甲酸鹽后，用對甲苯磺酰氯處理，可以生成異硫氰酸酯。規(guī)模:為滿足國家節(jié)能、環(huán)保和資源綜合利用要求，實現(xiàn)合理規(guī)模經(jīng)濟，新建MDI裝置單套起始規(guī)模必須達(dá)到30萬噸/年及以上(改造或擴建項目除外),新建TDI裝置單套起始規(guī)模必須達(dá)到15萬噸/年及以上(改造或擴建項目除外)。異氰酸酯部分生產(chǎn)裝置的反應(yīng)器、貯槽等在高溫、高壓下工作，存在著因設(shè)備腐蝕或密封件泄漏誘發(fā)中毒性事故和火災(zāi)事故等危險，必須加強工藝過程、設(shè)備制造與維護(hù)、安全管理，以確保安全平穩(wěn)運行。單異氰酸酯是有機合成的重要中間體。陜西船舶異氰酸酯涂層材料</p><p style="text-indent:25px">無色清亮液體, 有強刺激性。巴中異氰酸酯供應(yīng)商</p><p style="text-indent:25px">而隨著社會對環(huán)境保護(hù)的關(guān)注，能夠降低有機揮發(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，將是未來發(fā)展的重點?；旌闲途郛惽杷狨ス袒瘎┗谄?**的用途，未來發(fā)展前景樂觀。中企顧問網(wǎng)發(fā)布的《2020-2026年中國聚異氰酸酯行業(yè)發(fā)展趨勢與投資方向研究報告》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，接著分析了中國聚異氰酸酯規(guī)模及消費需求，然后對中國聚異氰酸酯市場運行態(tài)勢進(jìn)行了重點分析，zui.后分析了中國聚異氰酸酯面臨的機遇及發(fā)展前景。您若想對中國聚異氰酸酯有個系統(tǒng)的了解或者想投資該行業(yè)，本報告將是您不可或缺的重要工具。巴中異氰酸酯供應(yīng)商</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2889259.html</p></div></div></div></div></div><div id="yscgcgs" class="page-right twoColRt"><div id="yae8kye" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="02cykgw" 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配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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