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水生成

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The invention provides an anhydrous hydrogen fluoride production process; reaction raw materials fluorite powder and sulfate are mixed by an external mixer and enter into a converter with jacket; hot air with the temperature of 350 DEG C to 600 DEG C is fed in the jacket; the fluorite powder and the sulfate have chemical reaction and produce hydrogen fluoride; the produced hydrogen fluoride enters into a scrubber from a furnace header to be washed; the washed hydrogen fluoride enters into an intermediate tank from a condenser, and then receives distillation and degasification to prepare the finished product anhydrous hydrogen fluoride; solid residue is emitted from a furnace tail.

本发明提供一种无水氟化氢生产工艺,反应原料萤石粉及硫酸经外混器混合后进入带有夹套的转炉,向夹套内通入350~600℃的热风,萤石粉和硫酸在发生化学反应生成氟化氢,生成的氟化氢气体由炉头进入洗涤塔进行洗涤,洗涤后的氟化氢由冷凝器进入中间槽,然后经过精馏、脱气制得成品无水氟化氢;固体残渣由炉尾排出。

This paper analyzes generating elements of the city waterfront landscape—natural generating element and the expanded generating element.

文章分析了城市滨水景观生成元素——自然生成元素和扩展生成元素;总结了城市滨水空间构成特征:多维生态体系特征、生境场所特征和景观地标性特征;并以安徽省潜山县东关桥滨水景观为例,陈述了城市滨水的自然生成元素和扩展生成元素和特征以及生态空间构成实践。

The hot spot leads to the existence of calcium sulfate hemihydrate, which belongs to microwave special effect, rather that non-thermal effect. Second, based on the reaction to get calcium sulphate, we started and ended at the same temperature and then studied through experiment the difference of weight of calcium sulfate obtained through microwave heating and traditional water bath.

第二,基于硫酸钙晶体生成反应,实验研究了微波加热和水浴加热下从相同的初始温度加热到相同的末温生成硫酸钙晶体质量的差异;通过光纤温度计记录了加热过程中两种溶液中心点的温度变化,按照温度变化曲线,通过理论计算了不同的升温速率下微波加热和水浴加热下生成硫酸钙晶体的质量。

It provides a route tothe compounds which contains three functional groups, two carbon-nitrogentriple bonds and one carbon-carbon double bond. In water, metallic indiumpromotes carbon-sulfur bond coupling reaction of aromatic sulfonyl chloride withsuitable organic halides to afford sulfones. In the last chapter, metallic tin mediated allylation of aldimines with allylbromide was revealed.

第三章,我们研究了在水相介质中金属铟促进的烯丙基溴对1,1-二氰基-2-芳基乙烯的Michael加成反应,生成一个含碳碳双键和二个碳氮叁键的三官能团化合物,另外,金属铟在水介质中还可以促进芳基磺酰氯与卤代烃发生碳硫键的偶联,生成砜。

Molar Gibbs free energy or molar enthalpy of formation of complex oxysalt minerals with water is obtained by the summation of molar Gibbs free energy or molar enthalpy of formation of the part without water and water.

含水复杂含氧盐矿物摩尔生成Gibbs自由能或摩尔生成焓是不含水部分和水的摩尔生成Gibbs自由能或摩尔生成焓贡献值之和。

The easy generation of middle-and-steady-state and special phase under the hydrothermal condition, enable to form matter which is hard to form in low melting point, high-pressure steam and in the melting state, and enable to the crystallization generation under hydrothermal condition, such as the high-temperature thermal decomposition.

在水热与溶剂热条件下中间态、介稳态以及特殊物相易于生成,能够使低熔点、高蒸气压且不能在融体中生成的物质,及高温分解相等在水热与溶剂热条件下晶化生成。

The major hydrate is CSH gel under this condition. Curing of mortar in water increases the hydration degree of the binder with or without thermal proceeding. In addition to more CSH gels, some ettringite is formed.

试样脱模后在60 ℃蒸养6 h将阻碍无水石膏向二水石膏转化,但促进粉煤灰的火山灰反应,此时主要水化产物是CSH凝胶;继续水养护进一步促进胶结材的水化,除生成较多CSH凝胶外,还有部分钙矾石生成。

The investigated potassium carboxylates included: monocarboxylate potassium acetate, dicarboxylate potassium tartrate (K2Tart), tricarboxylate potassium citrate (K3Cit), and tetracarboxylate dipotassium of ethylenediaminetetraacetic acid (K2EDTA). KOAc can only induce calcium oxalate monohydrate, while K3Cit and K2EDTA induce COM and calcium oxalate dihydrate. The ability of multicarboxylates to induce COD formation was increased with increasing their concentrations.

加入一元醋酸钾只生成一水草酸钙晶体;三元柠檬酸钾(K3Cit)和四元乙二胺四乙酸二钾(K2EDTA)可诱导二水草酸钙形成,且随着其浓度增加,对COD的诱导能力增加,而二元酒石酸钾(K2Tart)同时诱导了COM, COD和三水草酸钙生成。

Taking into account the actual situation of the waterworks production,two suggestions were proposed for reducing the formation of trichloromethane one was optimizing the pre-treatment chlorine adding methed and selected a suitable point for chlorine adding;and the other one was improving the effic.

通过分析某水厂水处理过程各阶段水样中的三氯甲烷生成情况,讨论常规水处理对三氯甲烷生成的影响,并结合该厂的生产实际,提出水处理过程中降低三氯甲烷生成的建议:一是优化前加氯投加方式,选择合适的加氯点;二是提高原水浊度的去除率,减少消毒副产物的前驱物质。

The water produced in the reactions did not need to be removed during the reaction because BF4 was miscible with water while the acetals or ketals were immiscible with BF4. Hence the product could be separated conveniently bydecanting.

反应中生成的水不需要被除去,因为反应中生成的水会被BF_4吸收,而大部分缩醛、缩酮产物则不溶于BF_4,可通过简单的重力沉降分离,离子液体仅需简单减压除水后即可循环使用。

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