硫酸

The problem of transportation and time can be solved by producing hill sand in regions with abundant resource which can also lower cost and save river sand. High performance concrete has been playing an important role in the advancement of building industry.

高强混凝土在促进整个建筑业的进步方面功不可没，但是随着应用的混凝土等级的提高，特别是对于70MPa以上的混凝土已暴露出自身的一些缺陷，如混凝土强度与流变性能之间的矛盾，体积稳定性问题，抗硫酸盐类侵蚀性能力的下降等。

There are many problems in precipitating ammonium sulphate from a saturator, such as small crystal size, non-uniform crystal size distribution, nonstandard chroma and aggregation of crystals.

工业上硫酸铵通常是由炼钢的焦炉气被硫酸吸收后得到，或者是从生产己内酰胺的副产品中提取。

Ammonia distilling is to distill the residual ammonia from the blast section in an ammonia still, which evaporate the wolatile ammonia into the saturator to increase the production of vitiol ammonia and send waste water to biochemistry section to decontaminate.

蒸氨生产主要是将来自鼓风冷凝岗位的剩余氨水在蒸氨塔内进行蒸馏处理，使剩余氨水中的挥发氨蒸出后送回到煤气中以增加煤气含氨量进而提高硫酸氨的产量，并将蒸氨废水送至生化污水处理工序进行处理。

Methods: 50 ml of 50% magnesium sulfate solution, poured into the搪瓷碗, the hot water 10 milliliters, and then use gauze or a small towel (3 alternate use) with liquid After wet, dry slightly twisted so that they would not drop for the degrees, deposited in scleroma Department.

取50毫升50%的硫酸镁溶液，倒入搪瓷碗内，加热水10毫升，然后用纱布或小毛巾(3块交替使用)用药液浸湿后，稍拧干，以不滴水为度，敷在硬结处。

Using pickling liquid wastewater of hydrochloric acid,iron scurf and aluminiferous mine as raw materials,a series of poly-aluminum-ferric-silicate-chloride which has different molar ratio of Si:Al:Fe was prepared.

在钢铁制品的制备加工过程中，经常要用到盐酸或硫酸对其表面进行酸洗除锈处理，因此产生大量的酸洗废液，其中含有大量的亚铁离子。

The reason of cracking in elbow of the hot hi-pressure segregator oil P3327 pipeline in the hydrocracking unit was analyzed and a method to prevent from polythionic acid corrosion was provided.

对国产加氢裂化热高分油管线的弯头开裂原因进行了分析，并对预防连多硫酸腐蚀提出了相应的防范措

Further,semisteel,V_2O_5 flakes and titanium dioxide are achieved separately according to vanadium recovery from hot metal/vanadium slag and titanium recovery from titanium-beating sl.

通过进一步的铁水提钒、钒渣提钒和硫酸法提钛处理，生产出合格的半钢、片状 V_2O_5和钛白产品，元素回收率分别达到88%、 42%和75%，最终实现了铁、钒、钛的分离和综合回收利用。

P-Bromobenzaldehyde was synthesized from p-bromotoluene by direct oxidation with manganese sesquioxide The factors affecting the yields of p-bromobenzaldehyde were investigated.

用三氧化二锰直接氧化法将对溴甲苯氧化对溴苯甲醛，讨论了合成过程中影响产率的各种因素，确定反应的优化条件为温度338K，硫酸的浓度7.5mol/L，三氧化二锰1.8g，产率可达73.89%。

P-tert-Butyl benzaldehlyde was prepared by oxidation reation in a suspended three phases of solid, oil and water, constituted by manganese sesquioxide , starting material and H 2SO 4 of medium concentration.

利用二氧化锰在650 ℃下灼烧得到三氧化二锰，以三氧化二锰和中等浓度的硫酸构成的悬浮液在反应器内进行固、油、水三相氧化反应制得对叔丁基苯甲醛。

The manganese dioxide is transformed into manganese sesquioxide at 650°C, and then react with toluene to produce benzaldehyde in the existence of surphric acid in a three phase reactor.

利用二氧化锰650度下灼烧得到三氧化二锰；使用该原料与中等浓度的硫酸和甲苯在反应器内进行固、油、水三相反应，反应结束后甲苯氧化成为产品苯甲醛。

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％。