查询词典 sulfuric acid

In Figure 2, the reaction of MDNPH with acetaldehyde in sulfuric acid is presented.

图2、反应与乙醛mdnph硫酸案。

Ml sulfuric acid and 1 ml acetone were added for a total volume of 6 ml.

1毫升1毫升硫酸、丙酮等内容进行了总额6毫升。

This paper repots a study of the adsorption behavior of silver on charcoal, reports a method for the decomposition of charcoal with sulfuric acid and nitric acid, and establishes a method for the preconcentration and determination of the sub μg/L level of silver in natural water.

本文研究了银在活性炭上的吸附行为，提出了以硫酸、硝酸反复交替炭化，消化彻底分解破坏活性炭的处理技术。建立了活性炭富集火焰原子吸收测定天然水中亚μg/L水平银的分析方法。

With a purpose of making comprehensive use of heavy residual oil, condensed polynuclear aromatic resin is prepared using petroleum asphalt as raw material and terephthalyl alcohol as cross-linking agent under the catalysis of concentrated sulfuric acid or p-toluensulfonic acid.

从综合利用重质油出发，以石油沥青为单体，对苯二甲醇为交联剂，在浓硫酸或对甲苯磺酸催化下合成了缩合多环多核芳香烃树脂。

Melting point 3410 ℃, boiling point 560 ℃, relative density of 1935, F the external electronic structure of 5d46s2, in the chemical reaction time is very easy to lose 1-6 electronic, but also can get 1-2 electronic, so oxidation number of 0,± 1,± 2, 3, 4 , 5 and 6, with 6 price of the most stable compounds, such as WO3 does not dissolve in water, the air will form in the tungsten trioxide thin protective layer of tungsten, tungsten with fluorine at room temperature, chemical combination, red hot when there is no moisture and Bromine iodide together, red hot when you can and water reaction WO3, at room temperature reaction of tungsten with aqua regia, but the hot concentrated hydrochloric acid and sulfuric acid can only be played with its weak response, but molten nitrate, nitrite, too Hydrogen peroxide, sulfur steam, steam and other phosphorus can play intense reaction, high temperature can not be carbon, boron and silicon reaction of binary compounds, widely used in industrial tungsten steel and tungsten carbide, pure tungsten filament is used to the system, and X-ray tube Tube heating components, semiconductor components can be prepared tungsten silicide, tungsten industrial production is white or black tungsten ore tungsten ore refining.

熔点3410℃，沸点560℃，相对密度1935，F外围电子结构为5d46s2，在化学反应时很容易丢掉1—6个电子，也能得到1—2个电子，所以氧化数为0、±1、±2、＋3、＋4、＋5和＋6，以＋6价化合物最稳定，如WO3不溶于水，空气中的钨会形成薄层三氧化钨保护层，钨能与氟在室温下化合，红热并无潮气时能与溴、碘化合，红热时还能和水反应生成WO3，室温下钨可与王水反应，但热的浓盐酸和硫酸只能与其起微弱反应，但对熔融的硝酸盐、亚硝酸盐、过氧化氢、硫蒸汽、磷蒸汽等能起激烈反应，高温下不能与碳、硼和硅反应生成二元化合物，工业上广泛使用钨钢和碳化钨，纯钨用来制灯丝、电子管和X射线管的发热元件，硅化钨可制半导体元件，钨工业生产是将白钨矿石或黑钨矿石精炼。

Technology of sulfuric acid catalyzed ethyl esterification of high acid value tuna oil was studied.

以浓硫酸为催化剂，对高酸值金枪鱼油进行了乙醇酯化工艺的研究。

A second traditional method for removing organic matter that does not require heat is the use of a chromic acid–sulfuric acid mixture.

热硝酸是过去经常使用的一种非常有效的清洗玻璃器皿的方法，另一种传统的用于洗涤有机物而又不需加热的方法是使用铬酸-硫酸混合液，但考虑到其自身的危险性及毒性，我们不推荐使用铬酸。

The corrosion resistance of Aluminum alloys is improved by anodic oxidation, if the fatigue behaviors are taken into account, the behaviors of Aluminum alloys by sulfuric acid anodizing is better than by chromic acid anodizing.

阳极氧化是提高铝合金耐蚀能力的常用方法，如果从疲劳性能的角度考虑，经硫酸阳极氧化的铝合金腐蚀疲劳性能比铬酸阳极氧化的更好一些。

For decades, chromic acid and sulfuric acid were employed in chromium electroplating. The bath composition was simple and the process was easy to operate.

多年以来，镀铬主要使用铬酸和硫酸镀液，其成份简单，操作容易，无论镀装饰铬还是镀功能性铬，都能得到满意的效果。

Bisulfate:The univalent inorganic acid group HSO or a salt of sulfuric acid containing it.

硫酸氢盐：单价无机酸 HSO或含有它的硫酸盐。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。