查询词典 acetic

The invention discloses a method for synthesizing acetyl tributyl citrate, which uses tributyl citrate and acetic anhydride as reaction articles, uses naphthalenesulfonic acid methylal as the catalyst during the ester synthesis process, filtering the catalyst from reacted articles after reaction, water-washing, alkaline-washing, distilling the filtrate to obatin acetyl tributyl citrate.

本发明公开了一种合成乙酰柠檬酸三丁酯的方法，它以柠檬酸三丁酯、乙酸酐为反应物，在酯合成过程中用萘磺酸甲缩醛作催化剂，反应结束后，将催化剂从反应后的物料中过滤出来，滤液经水洗、碱洗、蒸馏获得乙酰柠檬酸三丁酯。

To explore the issue, 16 experiments to dissolve microcline have been conducted using different solutions with 2mol/L NaCl, 0.05mol/L acetic acid, 5ml crude oil or 0.05mol/L oxalic acid (the values are close to those measured in Tarim oilfield waters) and different initial pHs and temperatures.

为探讨该问题，实验配制了含2mol/L NaCl 、0.05mol/L 乙酸、5ml 原油、0.05mol/L 草酸(这些值接近塔里木盆地油田水实测值)，并控制初始 pH 0、温度，进行了16种不同条件下长石溶解作用的模拟实验研究。

BYS-1 could mineralize phenyl acetic acid. It was primarily identified as Halomonas.

序列同源性比较，将它初步鉴定为盐单胞菌属。

According to the Clausius-Mosotti-Debye equation,the dipole moment of the acetic ether is obtained to be 1.79D,which is close to the literature value.

根据Clausius-Mosotti-Debye方程，求出乙酸乙酯的偶极矩为1.79D，与文献值(1.78D)非常接近。

This test is a measure of the unsaturated linkages in a fat and is determined by reacting the fat with a solution of iodine monochloride in a mixture of acetic acid and CCU, liberating excess iodine with KI, and titrating with Na2S203.

这个试验是不饱和键的测量，它由脂肪与一氯化碘在乙酸与CCU的混合物的溶液反应进行测量，用KI除多余的碘，用硫代硫酸钠滴定。

The composition of additive for microemulsion compound diesel oil is formed from oleic acid 60-80%, concentrated ammonia water 15-20%, monoethanolamine 1-5%, acetic acid 1-5%, alkylnaphthalene 1.5-2% and hydrazine 6-10%.

本发明的微乳化复合柴油添加剂组成为：按重量百分比，油酸60-80％、浓氨水15-20％、一乙醇胺1-5％、乙酸1-5％、烷基萘1.5-2％、肼6-10％。

According to the graph of adsorption speed, a conclusion can be drawn that formic acid and acetic acid are fixed on the resin with multimolecular adsorption while propanoic acid and pentanoic acid are carried by monomolecular adsorption.

通过其吸附速度、吸附等温线的研究，得出甲酸和乙酸在该树脂上以单分子吸附为主，丙酸和成酸以多分子吸附为主，而且吸附的强弱与羧酸的解离有关，解离越强吸附越弱，反之，吸附越强。

The present invention adopts the technical proposal of adopting ZSM-5 mesoporous molecular sieve raw powder with a silicon-aluminum mol ratio SiO2Al2O3 of 20 to 1000 and a weight percentage of 20 to 100 percent as well as at least one caking agent selected from SiO2, clay and Al2O3 to extrude, tablet or spray into shape; then treating for 1 to 8 hours by 0.1 to 3 mol/l of at least one ammonium liquor from ammonium nitrate, ammonium chloride or ammonium sulphate or 0.1 to 8.5 mol/l of at least one acid liquor from muriatic acid, nitric acid, vitriol or acetic acid under a temperature of 20 to 90 DEG C; then using steam to treat for 2 to 15 hours under the temperature condition of 400 to 700 DEG C; using a liquor of 0.1 to 3mol/l selected from at least one of oxalic acid, citric acid or maleic acid under a temperature condition of 20 to 90 DEG C to dip for 2 to 5 hours to obtain the modified molecular sieve catalyst, thus better solving the problems.

本发明通过采用硅铝比SiO2/Al2O3为20～1000重量百分比计20～100％的ZSM-5介孔分子筛原粉与余量的选自SiO2、粘土或Al2O3中至少一种粘结剂挤条、压片或喷球成型；再经过0.1～3摩尔/升选自硝酸铵、氯化铵或硫酸铵中的至少一种铵溶液或0.1～8.5摩尔/升选自盐酸、硝酸、硫酸或乙酸中的至少一种酸溶液在温度20～90℃下处理1～8小时；然后在温度为400～700℃条件下水蒸汽处理2～15小时；再用0.1～3摩尔/升选自草酸、柠檬酸或马来酸中至少一种在温度为20～90℃条件下浸渍2～5小时得所需改性分子筛催化剂的技术方案较好地解决了该问题，可用于甲醇转化制丙烯的工业生产中。

Objective: To examine the efficacy of Muscovite on acetic acid-induced ulcerative colitis in rats,and to research the mechanisms of intestinal mucosal protection.

中文摘要：目的：探讨云母对大鼠溃疡性结肠炎的药效和肠黏膜保护作用机制。

Naphthyl aceate was synthesized with acetic anhydride and naphthol using aminosulfonic acid as catalyst.

以氨基磺酸为催化剂，用乙酸酐和β-萘酚合成了乙酸β萘酯。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。