查询词典 acid process

The investigation results indicate that:(1) During the process of waste acid, based on the proposed result of air oxidation flocculent precipitation, arsenic in waste acid can be transformed to high-class white arsenic or arsenic acid copper product.

在前人研究结果的基础上，根据含砷污酸与含砷废渣中主要元素存在形态和性质提出了用空气氧化絮凝沉淀法从污酸制备砷酸铜和白砷新处理工艺；提出了铟生产过程中选择性硫化沉淀除砷，提出了含砷废渣对土壤影响的治理方案。

The experiment results showed that:in acid pickling process, when reaction temperature is 100℃, the leaching time is 2.5h, mixing speed is 400r/min, the sulfuric acid density of solution is 45% and excess coefficient of sulfuric acid is 1.5, recovery rate of iron from hematite is 82.3%.

实验表明：在酸浸过程中，当反应的温度为100℃，浸出时间为2.5h，搅拌转速为400r/min，溶液硫酸浓度为45%，硫酸过量系数为1.5时，对铁矿中铁回收率可达82.3%。

The coking and deactivation process of benzene and ethylene alkylation reaction over AB-97 zeolite has been studied systematically. The results of acceleration deactivation reaction indicate that deactivation process go through three phases, high level activity stability period, activity decline period and low level activity stability period. The mechanism of this phenomenon was analyzed by the way of the experiment research of pore structure and acid quality of coked zeolite. It is concluded that reducing the strong acid active centers and crystal outer-surface active centers are benefit to improve the activity stability of zeolite.

在AB-97型分子筛催化剂上对苯/乙烯烷基化制乙苯反应体系的结焦失活历程系统实验研究，催速失活实验结果表明失活历程经历高水平活性稳定期，活性衰退期和低水平活性稳定期三个阶段，并通过对失活催化剂的孔结构及酸性质的实验研究，对这一现象进行了机理分析，认为催化剂改性研究中采用降低强酸活性位和晶粒表面活性位这两种手段都有利于改善催化剂的活性稳定性。

The preparing method adopts a mechanical commixing method that includes the process of preparing triethylic acid cellulose, adding metal oxide to solution, commixing, ball-milling, flow-spreading and filming and film processing; adopts an in-situ method that includes the process of preparing triethylic acid cellulose, preparing transition metal oxide latex, mixing, reacting, regulating pH value, flow-spreading and filming, and film processing.

所述的制备方法，采用机械共混法，其过程包括三醋酸纤维素溶液的制备、向溶液中添加金属氧化物、共混、球磨、流延成膜、膜处理；采用原位法，其过程包括三醋酸纤维素溶液的制备、过渡金属化合物乳液的制备、混合、反应、调节pH值、流延成膜、膜处理。

Compared with the present process for the synthesis of acrylate by esterification of acrylic acid, which comes by oxygenation of propylene, the process by the carbonylation of acetylene to acrylic acid and its esters pays less cost, and so, is worth to be studied.

相对于目前主张的丙烯氧化法生产丙烯酸，再酯化生产丙烯酸酯的主流工艺，乙炔羰基化法合成丙烯酸及酯的工艺具有很好的经济性应用价值。

Thinking of presenting problems, this research mainly studied some solid base catalysts which own higher catalysis ability and longer lifetime. Then, the phase diagram and equilibrium data of oil-alcohol-biodiesel-glycerol multiphase system were measured because the biodiesel producing process lacks of thermodynamic data.Based on a double-membranes theory and the thermodynamic data, a kinetic model was proposed. In addition, a mult-step extraction process was proposed to dispose the jatropha curcas l oil with high acid value in order to decrease the acid value. Then, a new technology of biodiesel producing using solid base as a catalyst was developed. The study objects and results are as follows.

本研究针对负载型固体碱催化剂活性组分易流失、使用寿命短的缺点，制备了高效、稳定的固体碱催化剂；针对生物柴油制备体系热力学数据缺乏的问题，测定了大豆油-醇-生物柴油-甘油体系的相图和平衡特性，在此基础上基于双膜理论，建立了固体碱制备生物柴油的动力学模型；同时针对酸价较高的麻疯果油，提出了先用甲醇或乙醇多级萃取降低酸价，再用固体碱催化制备的新工艺。

A stream of wastewater from citric acid production process was treated by using a biological process of the following steps: wastewater from citric acid neutralization→cultivating feed yeast→solubles tank→photosynthetic bac-teria tank→activated sludge tank.

采用柠檬酸废水→培养饲料酵母→可溶化槽→光合细菌槽→活性污泥工艺流程处理柠檬酸废水，实验结果表明，技术可行：原废水中COD_和BOD_5的总去除率达98％以上，达国家GB8978-88排放标准；

In order to reduce the production cost of aluminum fluoride by wet process ,and to use the local mineral resources,hydrofluoric acid,sulfuric acid and kaolinite were used as raw materials to produce aluminum fluoride by wet process .

为了降低湿法氟化铝的生产成本，同时利用本地的矿产资源，利用氢氟酸、硫酸、高岭土为原料生产湿法氟化铝。

In red wine fermentation process, lactic acid fermentation is usually carried out as vice fermentation is the use of lactic acid in sour wine malic acid into a more supple and stable lactic acid, and then into the aging stage.

在红葡萄酒的酿造过程中，通常会进行称为乳酸发酵的副发酵，是利用乳酸菌把酒中酸涩的苹果酸转变成较柔顺、稳定的乳酸，然后就进入陈酿阶段。

Natural fermentation of corn in the process of lactic acid bacteria as the most important advantage of strain, the article on lactic acid fermentation process in detail the analytical results show that: from chemical constituents, the ferment of lower ash, soluble sugar, fat content, protein, starch proportion cases raising; from the structure of starch, amylose fermentation in the increase, in molecular weight amylopectin rice amylopectin close to the molecular weight of the development.

在玉米米粉制作的过程中，发酵的方法能改良玉米的性质使其具有可加工性、改善玉米的不良风味。玉米自然发酵的过程中，乳酸菌为最主要的优势作用菌种。对乳酸菌发酵的过程进行详细的解析表明：从化学成分上来讲，发酵作用降低了灰分、可溶性糖、脂肪的含量，使蛋白质、淀粉所占比例提高；从淀粉结构来讲，发酵使直链淀粉含量增加，支链淀粉分子量朝着接近大米支链淀粉分子量的范围发展。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。