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| 本帖產(chǎn)生 1 個(gè) 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | ||
monanfang01鐵蟲(chóng) (初入文壇)
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[求助]
求翻譯啊 急用 謝謝大家啦 翻譯的越精確越好
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Noyori and co-workers [67,94] also reported the hydrogenation of carbon dioxide in its supercritical phase with dimethylamine. By using a catalyst [Ru(PMe3)4Cl2], up to 370,000 mol of DMF (N,N-dimethylformamide) per 1 mol catalyst are found in less than 37 h as shown in Eq. (5). Under the comparatively drastic reaction conditions (100 8C, 210 atm), the condensation of dimethylammonium formate to DMF takes place in liquid phase. Most of the DMF formed then is dissolved in the supercritical phase, while the water content of the liquid phase increases. In this way, all of the dimethylamine used is converted into DMF quantitatively [65,94]. Recently, DMF is also reported to be produced with heterogeneous ruthenium catalysts [4]. Silylether ruthenium complexes were anchored in a silica matrix by condensing with Si(OEt)4 (tetraethoxysilane) as shown in Scheme 2 [4]. All gels were micro- to meso-porous and the organometallic complexes were immobilized as monomers. The hybrid gel catalysts can easily be separated from the reaction mixture. The silica matrix-stabilized ruthenium complexes affords the TOF up to 18,000 h1 and 100% selectivity from CO2, H2 and dimethylamine for the formation of DMF [4,95,96]. The hydrogenation of CO2 to CO, the reverse water gas shift reaction, is shown in Eq. (6). The hydrogenation of CO2 beyond formic acid, formaldehyde and CO produces methanol, methane and occasionally higher alcohols and hydrocarbons |
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一志愿211院校 344分 東北農(nóng)業(yè)大學(xué)生物學(xué)學(xué)碩，求調(diào)劑
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南京工大
木蟲(chóng) (小有名氣)
- 翻譯EPI: 14
- 應(yīng)助: 0 (幼兒園)
- 金幣: 1971.3
- 散金: 102
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- 蟲(chóng)號(hào): 1410020
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- 性別: GG
- 專(zhuān)業(yè): 高分子組裝與超分子結(jié)構(gòu)
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
monanfang01: 金幣+30, 翻譯EPI+1, ★★★很有幫助 2013-04-29 00:05:14
monanfang01: 金幣+30 2013-05-01 00:09:07
monanfang01: 金幣+30, 翻譯EPI+1, ★★★很有幫助 2013-04-29 00:05:14
monanfang01: 金幣+30 2013-05-01 00:09:07
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Noyori和他的同事也報(bào)道了二氧化碳在超臨界狀態(tài)與二甲胺可以發(fā)生加氫反應(yīng)。通過(guò)使用（。。。）作為催化劑，如同方程5所示，每1 mol催化劑在37 h內(nèi)可以催化得到370000 mol的DMF。在較為極端的反應(yīng)條件（100°C，210 atm）下，二甲基銨甲酸鹽的冷凝得到DMF的過(guò)程發(fā)生在液相中。絕大多數(shù)生成的DMF溶解到超臨界相中，同時(shí)伴隨著液相中水的含量的增大。通過(guò)這種方式，所有的二甲基胺都定量的轉(zhuǎn)化為DMF。 最近，也有關(guān)于使用非均相釕催化劑制備DMF的方法也見(jiàn)于報(bào)道。由圖2顯示，甲硅烷基醚-釕的復(fù)合物通過(guò)與正硅酸四乙酯發(fā)生冷凝作用，被錨定在二氧化硅的基質(zhì)上。所有的凝膠都具有微孔或中孔的多孔結(jié)構(gòu)，有機(jī)金屬?gòu)?fù)合物被固定作為單體。該雜化凝膠催化劑易于從反應(yīng)混合物中分離。這種二氧化硅基質(zhì)穩(wěn)定的釕復(fù)合物使其在通過(guò)二氧化碳、氫氣、二甲基胺制備DMF的過(guò)程的有效作用時(shí)間達(dá)到18000 h，選擇性達(dá)到100%。 方程6所示的反應(yīng)為二氧化碳加氫得到一氧化碳的反應(yīng)，即水煤氣轉(zhuǎn)化反應(yīng)的逆反應(yīng)。除同甲酸、甲醛、一氧化碳的加氫反應(yīng)外，二氧化碳的加氫反應(yīng)還可以得到甲醇、甲烷，以及偶爾生成的高碳數(shù)醇和碳?xì)浠衔铩? |
2樓2013-04-28 23:44:42
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