查询词典 alkali

The invention relates to a continuous process for recovering caprolactam from aqueous caprolactam product, said aqueous caprolactam product comprising caprolactam, impurities, and water, said process comprising: adding alkali hydroxide to the aqueous caprolactam product, in an amount of not more than 100 mmol alkali hydroxide per kg of caprolactam; reacting at least part of the added alkali hydroxide to form alkali amino caproate, to obtain a caproate-enriched caprolactam product; and distilling the caproate-enriched caprolactam product at reduced pressure.

本发明涉及从含水己内酰胺产物中回收己内酰胺的连续方法，所述含水己内酰胺产物包括己内酰胺，杂质，和水，所述方法包括：以不超过100mmol碱金属氢氧化物/kg的己内酰胺的量将碱金属氢氧化物加入到含水己内酰胺产物中；让所添加的碱金属氢氧化物的至少一部分起反应，形成碱金属氨基己酸盐，以获得了富含己酸盐的己内酰胺产物；和减压蒸馏富含己酸盐的己内酰胺产物。

The experiment was conducted to the improvement of the soil alkali -salinity in songnen grassland, based the seed movement over thenaked alkali-saline soil, which is very important significance on theory and appliance, and at the same time, we also explore a new way to improve naked alkali-saline soil by inserting cornstalk.

本实验以松嫩重度盐碱地为研究对象，通过对裸碱斑表面种子流研究为改良盐碱化草地改良提供了理论和指导，同时开展了扦插玉米秸秆法改良盐碱地的研究。

The preventive measures for the harmful defects of alkali metals are as follows: 1, reducing the alkali metals content in the raw materials; 2, increasing the MgO content of the sinter , decreasing the basicity of slag , decreasing the Si content of the pig iron, increasing relative slag volume; 3 , introducing prereduced ore pellets or partly reducted sinter; 4increasing the ability of coke resisting alkali metals; 5, using refractories that have the ability of resisting corrasion of alkali metals; 6 , cleaning the blast furnace periodically. The above recommendations are necessary for decreasing the circulation and accumulation of alkali metals effectively in blast furnace, reducing the harmful influence of alkali metals on blast furnace, increasing the smelting intensity, decreasing the coke rate, improving the gas permeability.

基于碱金属对高炉冶炼的上述危害，本文结合湘钢高炉的实际生产情况，通过理论分析、计算以及其他钢厂防治碱害的经验，提出防治高炉碱害的措施：1、减少入炉原、燃料的碱金属含量；2、提高烧结矿中的MgO含量、降低炉渣碱度、降低生铁含硅量、适当增加渣量；3、采用预还原的金属化球团或部分还原的烧结矿；4、提高焦炭的抗碱能力；5采用抗碱侵蚀的耐火材料；6、周期性性洗炉，以有效地减少碱金属在高炉内的循环富集，降低碱金属对高炉的危害，提高高炉的冶炼强度，降低焦比，改善高炉透气性。

By the medium of experiment and research to alkali-aggregate reaction of Shan XI Face Concrete,We discussed respectively from total alkali in concrete, alkali reactiveness of aggregate and damp environment that alkali-aggregate reaction may be damaged.

提要：本文通过珊溪面板混凝土碱骨料反应的试验研究，分别从混凝土总碱量，骨料的碱活性及发生碱骨料反应破坏的潮湿环境进行了论述，认为珊溪面板混凝土是安全的，不会发生碱骨料破坏。

The alkali dosage depends mainly on the constituents and property of material and the quality requirements for pulp: more alkali dosage will speed up cooking process, reduce the hardness of pulp and improve the bleachability of pulp; but excessive alkali dosage will lower the pulp yield and physical intensity, while too less alkali dosage will result in harder and darker pulp, uneasy to bleach, too much screenings, and even extending cooking time cannot guarantee the reaction of delignification.

用碱量主要取决于原料的组成和性质及对纸浆的质量要求：加用碱量有利于加快蒸煮速度降低纸浆硬度和提高纸浆的可漂性：但过高却会降低纸浆得率和物理强度，如过低时，成浆较硬而色暗，不易漂白而且筛渣多即使延长蒸煮时间也难以保证脱木素反应进行。

Taifeng valve" own exclusive property of chlorine valve, chlor-alkali brine dedicated valve, chlor-alkali gas, liquid-specific filters, chlor-alkali evaporation dedicated ball valve, special valve soda, chlorine-specific non-return valve, chlorine-specific security valve, ball valve dedicated chlorine, chlorine dedicated filling valve, check valve Straflo chlor, chlor-alkali many dedicated sealed valve, chlorine-specific shut-off valve, chlorine filter dedicated endoscopy, chlorine dedicated bellows valves, chlorine gas regulating valve a number of patented technologies, such as country, are chlor-alkali, soda ash valves exclusive brand of choice for industry and chlor-alkali, soda ash, chemical industry enjoys a high reputation!"

&泰丰阀门&拥有自主产权的氯气专用阀、氯碱盐水专用阀、氯碱气、液专用过滤器、氯碱蒸发专用球阀、纯碱专用阀、氯气专用止回阀、氯气专用安全阀、氯气专用球阀、液氯灌装专用阀、氯碱贯流止回阀、氯碱专用多密封截止阀、氯气专用切断阀、氯气专用过滤视镜、波纹管氯气专用阀、氯气调节阀等多项国家专利技术，是氯碱、纯碱专用阀业的首选品牌，并在氯碱、纯碱、化工工业中享有较高的声誉！

Detailed geology- petrology-mineralogy study shows that late Triassic-early Jurassic granites can be divided into 4 groups: granodiorites, monzonitic-K syenogranites mainly, alkali feldspar-alkali granites and syenite, Middle Jurassic granites is composed of quartz diorites-granodiorites and monzonitic granites, the main rock type includes granodiorites and monzogranites; Early Cretaceous granites include alkali gabbro, alkali granites and granodiorites, and these rocks composed bimodal igneous rock group.

详细的地质-岩石矿物学研究表明，晚三叠-早侏罗世花岗岩可以划分成四种岩石组合，即花岗闪长岩组合、二长花岗岩—正长花岗岩组合、碱长花岗岩—碱性花岗岩组合和正长岩组合，其中以二长花岗岩—正长花岗岩组合为主；中侏罗世花岗岩由石英闪长岩-花岗闪长岩组合和二长花岗岩组合构成，岩石类型以花岗闪长岩和二长花岗岩为主；早白垩世出现了碱性辉长岩、碱性花岗岩和花岗闪长岩，构成双峰式火成岩组合。

Many a rabic words are still used in chemistry --'alkali','alcohol' and even 'alchemy' itself, which means 'the art of Egypt

化学这门科学在今天仍然使用着许多阿拉伯字——&alkali&、&alcohol''，甚至连&alchemy&这个字本身也是阿拉伯字，它的意思是&埃及的技术。

The inhibiting effect of aluminous compounds including on alkali-silica reaction in gravel and zeolitization perlite mortars were investigated. The aluminous compounds content, the alkali reactivity of the aggregate and the alkali content will affect the inhibiting effect.

研究了Al3、α-Al2O3等不同的含铝化合物对砾石、沸石化珍珠岩2种集料碱硅酸反应膨胀的抑制作用，讨论了掺量、集料碱活性、碱含量对含铝化合物抑制碱硅酸反应（alkali silica reaction， ASR）效果的影响。

Our main products are alkali, alkali-free glass fiber rovings Plaid, 7628 electronic-grade glass fiber cloth, in the alkali, alkali-free glass fiber grid cloth and so on.

本厂主要产品有中碱、无碱玻璃纤维无捻粗纱方格布，7628电子级玻璃纤维布，中碱无碱玻璃纤维布和网格布等。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。