The invention relates to a process for producing polyethylene terephthalate 1, 3-propanediol, which comprises the following steps: using titanic acid ester as major catalyst, using germanium compounds and cobalt compounds as synergic catalyst, conducting esterification reaction for poly terephthalic acid and 1, 3-propanediol according to the molar 1:1.05-2.2 under the nitrogen pressure of 0.1-0.4MPa and 230-265 DEG C, or conducting ester exchanging reaction for poly terephthalic acid and 1, 3-propanediol according to the molar ratio 1:1.8-2.2 in 160-220 DEG C, decompressing reaction to high vacuum 10-150Pa, wherein the final temperature of reaction is 265-275 DEG C, recovering to normal pressure with nitrogen to obtain the PTT product.

本發(fā)明涉及一種生產(chǎn)聚對(duì)苯二甲酸1，3-丙二醇酯的方法免费一级持黄网，采用以鈦酸酯為主催化劑91精品国产久无码，鍺化合物和鈷化合物為協(xié)同催化劑，對(duì)苯二甲酸二甲酯和1人干人操人，3-丙二醇按摩爾1∶1.05-2.2无码国产一区二区免费，在0.1-0.4MPa氮?dú)鈮毫?30-265℃下進(jìn)行酯化反應(yīng)欧美性爱操比黄色视频在线观看，或?qū)Ρ蕉姿岫柞ズ?，3-丙二醇按摩爾比1∶1.8-2.2欧美色网址，在160-220℃進(jìn)行酯交換反應(yīng)国产女主播喷水视频在线观看，將反應(yīng)減壓至高真空10-150Pa，反應(yīng)終溫在265-275℃中文字幕无码免费久久9一区9，用氮?dú)饣謴?fù)到常壓a片www免费看，得到本PTT產(chǎn)品；大大縮短了反應(yīng)時(shí)間日韩va欧美中文字幕在线，直接聚合制備特性粘度在0.7-1.05dL/g的PTT切片91尤物无码国产在线观看，使反應(yīng)產(chǎn)物色相良好，PTT產(chǎn)品可用于纖維加工及工程塑料領(lǐng)域特板人人操556。

Intermidiate 1, 2-propanediol-sebacate was synthesized with 1, 2-propanediol and sebacic acid, then a novel degradable elastomer, poly, was synthesized by melt phase polycondensation of 1, 2-propanediol-sebacate and citric acid under under certain conditions.

通過(guò)癸二酸與1日韩欧美精品中文字幕，2-丙二醇反應(yīng)，生成中間體癸二酸聚酯二元醇花季传媒视频免费观看ios，然后將中間體與檸檬酸在一定條件下熔融縮聚制得了一種可降解彈性體聚癸二酸丙二醇檸檬酸酯全部免费的a毛片在线看。

In comparison with the anaerobic batch fermentation of 1,3-propanediol from saponified glycerol, the bioprocess of two successive microbial fermentations for the production of 1,3-propanediol was feasible. The yield of 1,3-propanedio was higher than that of 1,3-propanediol directly from saponified glycero with 15 h in the two-stage fermentation in a 18h batch fermentation.

玉米淀粉。微生物發(fā)酵191POPN九色，3一丙二醇(1国产黄大片手机在线观看，3-propanediol，簡(jiǎn)稱1原创av，3一PD)是一種重要的化工原料97人人操人人摸人人搞，與乙二醇、l国产又大硬又爽免费视频，2一丙二醇和1久久精品99久久久久久，4一丁二醇有著相似的性質(zhì)和用途，但又有許多其他二醇所不具備的優(yōu)點(diǎn)中文字幕,大黄片，尤其是1超碰在线视屏观看，3-PD與對(duì)苯二甲酸合成的新型聚酯——聚對(duì)苯二甲酸丙二酯所展示的許多優(yōu)良特性，使1欧美一级激情操逼aaa黄，3一PD的研究開(kāi)發(fā)日趨活躍求一个毛片网站。

propane soldering iron：丙烷加熱烙鐵

propane dicarboxylic acid 丙二羧酸 | propane soldering iron 丙烷加熱烙鐵 | propanediol 丙二醇

corn sugar：玉米糖

如杜邦(DuPont)與杰能科(Genencor)合作共同開(kāi)發(fā)以玉米糖(corn sugar)生產(chǎn)丙二醇(propanediol)的發(fā)酵工藝. 丙二醇作為一個(gè)起點(diǎn),杜邦公司已創(chuàng)造了一種稱為Cerenol的新型生物聚合物,可代替汽車(chē)油漆等產(chǎn)品中的石油原料. 同樣地,

Dipotassium Phosphate：磷酸氫二鉀

Aminomethyl propanediol 氨甲基丙二醇 | Dipotassium phosphate 磷酸氫二鉀 | Carbomer 卡波莫, 卡波姆, ... ?乳化劑