1、4丁二醇生產(chǎn)工藝

1、1、4 丁二醇生產(chǎn)工藝乙炔為原料的 Reppe法該工藝分兩步,第一步是乙炔和甲醛銅催化生成1,4-丁炔二醇并副產(chǎn)炔丙醇，第二步是1,4-丁炔二醇加氫生成 BDO。目前傳統(tǒng)的Reppe工藝已被更新"ISP公 司開發(fā)了硅酸鎂為載體的催化劑，并加入了鉍，從而抑制了銅聚反應(yīng)，并使丁炔二醇合成系統(tǒng)在低而安全的乙炔分壓下進(jìn)行操作，免除了燃爆危險”在丁炔二醇低壓合成系統(tǒng)，使用一連續(xù)攪拌釜 通入37%的甲醇，以 12%Cu-2%Bi/硅酸鎂（數(shù)字為催化劑中金屬的質(zhì)量分?jǐn)?shù)）為催化劑，反應(yīng)溫度95 °C，乙炔分壓011MPa，pH56。惰性氣體用作稀釋劑以減小乙炔分壓從而使爆炸 危險最小化。丁

2、炔二醇以甲醛計轉(zhuǎn)化率為95%，炔丙醇回收，丁炔二醇的理論產(chǎn)率為95%"ISP公司將氫化工序改良為兩段加氫。35% 丁炔二醇水溶液與乙酸銅一起流入連續(xù)攪拌釜式反應(yīng)器，以RannyNi為催化劑，在溫度 5060C,氫氣壓力1.42.0MPa下操作，產(chǎn)生含有 部分氫化和羰基化合物的粗BDO蒸氣”粗BDO蒸氣在一填充 Ni-Cu-Mn/硅膠催化劑的固定床反應(yīng)器再一次加氫，反應(yīng)溫度120140 C氫氣壓力131820.MPa"ISP公司進(jìn)一步研究發(fā)現(xiàn)， 硅膠載體在第二段高壓氫化反應(yīng)條件下自身降解，導(dǎo)致反應(yīng)器壓力脈動”為此,開發(fā)了由15%Ni-7%Cu-0.5%MnAI組成的一種新催化

3、劑，該催化劑在反應(yīng)條件下活性高，自身穩(wěn)定，壽命長"1,4- 丁二醇產(chǎn)率以乙炔計為 93.1%" When you are old and grey and full of sleep,And no ddi ng by the fire, take down this book,And slowly read, and dream of the soft lookYour eyes had once, and of their shadows deep;How many loved your mome nts of glad grace,And loved your beau

4、ty with love false or true,But one man loved the pilgrim soul in you,And loved the sorrows of your cha nging face;And bending dow n beside the glow ing bars,Murmur, a little sadly, how love fledAnd paced upon the mountains overheadAnd hid his face amid a crowd of stars.The furthest dista nee in the

5、worldIs not betwee n life and deathBut whe n I sta nd in front of youYet you don't know thatI love you.The furthest dista nee in the worldIs not whe n I sta nd in front of youYet you can't see my loveBut whe n un doubtedly knowing the love from bothYet cannot be together.The furthest dista nee in the worldIs not being apart while being in loveBut whe n I pla inly cannot resist the year ningYet prete nding you have n ever bee n in my heart.The furthest dista nee in the worldIs not struggli ng aga inst the tidesBut