查询词典 acid ratio

We further investigated the mechanism of VFAs production. Results revealed that this novel process could reduce the inhibitory effect of VFAs on the acid-forming microorganisms, and the total VFAs yield and the removal ratio of organic solids respectively depended on the first stage and the third stage of this novel process.

进一步分析多级逆流工艺产酸的机制，发现产酸效率的提高在于降低了发酵产物对厌氧产酸细菌的抑制效应，并且工艺的VFAs产率以及有机质去除率分别取决于第一级和第三级厌氧发酵过程。

Effects of catalyst use rate, microwave power, microwave irradiation time, and molar ratio of alcohol to acid were studied.

考察了催化剂的用量、微波功率、微波辐射时间、醇酸比对酯产率的影响。

In order to improve the conditions of synthesis, the effects of kinds of catalysts, mole ratio of alcohol and acid, reaction time were investigated by the variance analysis.

利用正交设计法，通过极差分析，探讨了催化剂种类、醇酸摩尔配比和酯化时间及它们之问的交互作用对酯的收率的影响。

The influence of water content,molar ratio of methanol to oil,concentration of alkaline catalyst,reaction temperature and time different reaction factors to transesterification ,and methods such as water washing,acid washing,extraction and pressure reduced etc.

考察了原料油水分含量、醇油物质的量比、催化剂浓度、反应温度、反应时间等对转酯化反应的影响，以及水洗、酸洗、萃取、减压蒸馏等不同后处理方法对产品品质的影响。

The optimum conditions were found to be: 4.5 g of stearic acid, 75 mL of carrier solvent (having a volume ratio of ethanol to cyclohexane of 1:9), 5 g of alkaline Ca-bentonite, and a reaction time of 1.5 h.

结果表明，获得有机烧失量为36.25%产品的最佳制备工艺条件为：硬脂酸4.50g，分散剂75 mL（乙醇与环己烷的体积比为1：9），碱性土5.00g，反应时间1.5h。

A fine quality of Zn-Cr coating can be synthesized as molar ratio of zinc powder:chromate=0.08-0.2,chromate:acrylic acid=0.8-4,the amount of polyvinyl alcohol in the coating bath reaches 20-40at%.

当铬酐与锌粉的质量比在0.08～0.2之间，铬酐与丙烯酸的质量比在0.8～4之间，10％聚乙烯醇含量在7～13wt％时，司·得到质量较好的锌铬涂层。

The effects of molar ratio of benzyl alcohol to acetic acid,reaction time,and the amount of catalyst and its reusability on esterification yield were discussed.

结果表明，乙酸苄酯最适宜的合成工艺条件为：酸醇摩尔比2∶1、催化剂用量3.5%、带水剂用量40%、反应时间6 h。

The results showed that the optimal conditions for synthesis of benzyl acetate were: the molar ratio of acetic acid to benzyl alcohol was 2∶1,the amount of the water carrier was 40%,the amount of the catalyst was 3.5%,and reaction time was 6 h.

结果表明，乙酸苄酯最适宜的合成工艺条件为：酸醇摩尔比2∶1、催化剂用量3.5%、带水剂用量40%、反应时间6 h。

The phase equilibrium data of SBO-FAME-Methanol, SBO-FAEE-Ethanol and Glycerol-FAEE-Ethanol systems were measured. The results indicated that it involved two different stages: liquid-liquid-solid reaction stage and liquid-solid reaction stage. When the molar ratio of methanol to oil is 12:1 at 65℃, the turning point is at a 55% biodiesel yield. The liquid-liquid-solid reaction model was proposed based on the double-membranes theory. It indicated that the process is reaction and mass transfer controlled together at the first stage, and the second stage is reaction controlled. The predictions of the model are matched with the experimental results.In the end, the acid was extracted using methanol and ethanol from jatropha curcas l oil.

测定了生物柴油制备过程中的SBO-FAME-Methanol、SBO-FAEE-Ethanol、Glycerol-FAEE-Ethanol三组分相平衡数据，表明固体碱催化过程分为液-液-固和液-固两个反应阶段，在醇油摩尔比为12：1、65℃的初始反应条件下，转化率达到55%时，为第一阶段向第二阶段的转折点；基于双膜理论建立了固体碱催化制备生物柴油的非均相液-液-固反应模型，表明两个反应阶段分别为传质、反应共同控制和反应控制，模型计算值与实验值吻合较好。

In the process of the synthetic experiment with the pearlizer, the researchers focus their efforts on the exploration of the following areas concerning the artificial pearliser:(1) the material ratio (2) the amount of the catalyst used (3) the effect of such technological conditions as temperature and time on the performance of the final product, and (4) the ester value, acid value, yield rate, and appearance.

在这次珠光剂的合成实验中，我们主要从以下凡个方面进行了探索研究工作：(1)原料配比。(2)激活剂用量。(3)温度、时间等合成工艺条件对产品性量的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。