查询词典 acid ratio

The method solves the problems better through adopting the following technical proposal that: the method takes the solid super acid consisting of the VIB group elements or the VIB group elements and the IVB group elements in the periodic table of elements and loaded on a symbiosis molecular sieve as catalyst, and naphtha with the component being C4-C10 as a raw material so as to carry out catalytic cracking reaction at a temperature of between 550 and 700 DEG C, under a pressure of between 0.01 and 0.5 MPa, at a reaction weight space velocity of between 0.1 and 4 hours and with the weight ratio between water and naphtha of between 0.5:1 and 4:1, thereby generating ethylene and propylene.

本发明涉及一种催化裂解制乙烯丙烯的方法，主要解决现有催化裂解制乙烯丙烯催化剂的使用温度高，活性低，乙烯丙烯选择性差的问题，本发明通过使用在共生分子筛上负载由元素周期表VIB族元素或VIB族元素和IVB族元素组成的固体超强酸作为催化剂，以组份为C 4 ～C 10 的石脑油为原料，在反应温度为550～700℃，反应压力为0.01～0.5MPa，反应重量空速为0.1～4小时-1 ，水/石脑油重量比为0.5～4∶1的条件下，进行催化裂解反应生成乙烯丙烯的技术方案，较好地解决了该问题，可用于催化裂解制乙烯丙烯的工业生产中。

Effects of the mol ratio of acrylic acid/vinyl acetate and the churn-dasher on conversion, molecular weight and molecular weight distribution of the obtained polymers were investigated by gravity method and gel permeation chromatography.

通过聚合转化率和凝胶渗透色谱的测定，研究了聚合过程和所制备聚合物的分子量及其分布，以及丙烯酸对聚合物分子量分布的影响；进一步探讨了反应装置的安装及结构对聚合反应的影响。

The optimum conditions were obtained as follows : the weight ratio of fatty acids of rapeseed oil and 85%acetic acid is 1:4, ozonolysis temperature is 20-25

本文使用植物油脂肪酸为原料，原料丰富，价格低廉；使用含水溶剂不但提高了产品收率，而且降低了溶剂挥发性和溶剂的腐蚀性；使用活性炭吸附壬二酸粗品大大提高了壬二酸纯度，此方法简便易行，用此方法处理壬二酸粗品，壬二酸的纯度可达96.1%。

When the compounding ratio of aliphatic resin, aromatic resin, unsaturated hydroxy acid ester, and metallic soap blends was 3:3:1:3, the homogenizing-dispersing agent THD was produced.

结果表明，当脂肪烃树脂、芳香烃树脂、不饱和醇酸酯及皂类混合物之间配比为3：3：1：3时制得的均匀分散剂THD可以改善胶料混合的均匀性，提高炭黑的分散效果，并且节约混炼能耗，增加了胶料的耐老化性能，对硫化胶的力学性能影响不大。

The esterification reaction was carried out in isooctane solvent at 50℃, with 0.15mol/L of substrate and 1:1.4 of acid-alcohol molar ratio.

研究了反应温度、溶剂、底物浓度、底物摩尔比、吸水剂用量等因素对酯化反应的影响，确定了正戊酸异戊酯的最佳合成条件为：反应温度为50℃，异辛烷为反应介质，底物浓度为0.15mol/L，酸醇摩尔比为1：1.4。

The synthesis of isoamyl acetate with sulfuric acid and TBAB as catalyst was studied,and the effects of the raw material ratio,the dosage of catalyst and reaction time on the yield were investigated.

以冰乙酸和异戊醇为原料，用浓硫酸和四丁基氯化铵混合物催化合成乙酸异戊酯。

The reaction conditions are that the catalyst is 2.0 g, the mole ratio of acid to alcohol is 2.6︰1, the average esterification yield of isoamyl acetate is 70.6%.

但也有明显的缺点，如腐蚀设备严重、易使产品炭化等。为此，我们以硅胶作为载体制备了硅胶负载硫酸催

The initial rate V0 was influenced by the ratio of molar concentration for butanol to hexanoic acid C(superscript 0 subscript ROH)/C(superscript 0 subscript HA)(at a range of 0.2-17). As C(superscript 0 subscript ROH)/C(superscript 0 subscript HA) decreases, especially when C(superscript 0 subscript ROH)/C(superscript 0 subscript HA), the V0 increases rapidly.

反应初始速率V0与正丁醇和正己酸摩尔浓度的比值C(上标 0 下标 ROH/C(上标 0 下标 HA)有关，在C(上标 0 ROH)/C(上标 0 下标 HA)=0.2-17范围内，随C(上标 0 下标 ROH)/C(上标 0 下标 HA)比值减小，初始速率V0增大，尤其是当C(上标 0 下标 ROH)/C(上标 0 下标 HA)时，V0迅速增大。

Cooked using the process of German companies BASF professional fur cooked reagents, using the most advanced production of chrome rubbing the skin and hair of a centralized processing, the main process are: skin pretreatment ---- 24小时Baptist acid -- Paper plates - rubbing the oil to heat the system ---- skim softening --------- forming fat -- stain-kneading fine - hot - such as dozens of fine cut Road, skin color into the finished product production Section, according to a fineness of wool ratio, and then after cutting, stitching, shape, and quality inspection procedures can only be a few dozen packaging factory.

熟制过程使用德国BASF公司的专业裘皮熟制试剂，采用国际最先进的铬揉生产法，对皮和毛进行集中统一化的处理，主要工艺有：原皮预处理----24小时浸酸---皮板去油---揉制----高温脱脂---成型---软化---加脂—复揉---染色---精烫--精剪等数十道，成品色皮进入成品生产工段后，还要根据毛质细度进行配比，再经过裁剪，缝合，成型，及质量检验等几十道工序才可以包装出厂。

Contains Conjugated Linoleic Acid that promotes protein and fat metabolism and also helps to improve the ratio of muscle to fat.

含接合式亚油酸，促进蛋白质及脂肪代谢，减少身体脂肪，重组身体肌肉与脂肪比例。

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％。