hydrofluoric

Etherification of ethanol and tert-butyl alcohol to ETBE ( ethyl tertiary butyl ether), using USY zeolite midified by hydrofluoric acid as the catalyst, was studied.

以氢氟酸改性USY为催化剂，乙醇和叔丁醇为原料，合成乙基叔丁基醚（ETBE）。

互联网摘选

Hexadecylbenzene was prepared by the alkylation of benzene with 1-hexadecene over supported hydrofluoric acid on USY.

采用负载氢氟酸的USY分子筛作为催化剂,以苯和十六碳烯为原料,经烷基化反应合成十六烷基苯.

互联网摘选

The growth time and anode oxidize velocity control the thickness and porosity. Porous silicon layers were formed by anodization of Si wafers in hydrofluoric ( HF) solu-tion.

通过在阳极氧化反应中采用不同的HF溶液的浓度、电流密度和反应时间来控制多孔硅的膜厚、孔隙度等特性。

互联网摘选

Our products include fluospar, acid-fluospar, and industrial grade hydrofluoric acid, etc.

产品有莹石粉 、 无水氟化氢 、 工业氢氟酸等.

互联网摘选

This paper reports a case of hydrofluoric acid burn complicated inhalation injury and serious fluorine toxicosis.

本案例为氢氟酸烧伤并气体吸入性损伤,为严重氟中毒.

互联网摘选

Hydrofluoric acid is a highly toxic compound and has strong erosive effect.

氢氟酸属于高毒类物质,有较强的腐蚀作用.

互联网摘选

Technique consultion on assemble bine of Hydrofluoric acid in Jian Hu phosphorus fertilizer.

7.建湖县磷肥厂氢氟酸生产线技术咨询.

互联网摘选

Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid.

表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来.

词典精选例句

A hydrofluoric acid corrosion resistant coatings and their application were recommended.

介绍了一种耐氢氟酸腐蚀的涂料及其应用效果.

互联网摘选

Depending on conditions, hydrogen fluoride may convert to hydrofluoric acid ( aqueous ) at varying concentrations.

根据条件, 氟化氢可以在多种浓度下转化成氢氟酸 ( 水成的 ).

互联网摘选

The FeSO_4 obtained by reduction is purified, adding to NH_4OH-NH_4HCO_3 solution containing organic additives, precipitated and finally washed and then calcined at 900 ℃ for 2 hours. The calcined product is washed using dilute nitric acid and hydrofluoric acid, obtaining high-purity α-Fe_2O_3.

还原后得到的硫酸亚铁经过净化除杂，滴加到含有适量有机添加剂的沉淀剂NH4OH-NH4HCO3中，沉淀洗涤干燥后900℃煅烧2h，煅烧产品再用稀硝酸和氢氟酸洗涤，得到高纯球形-αFe2O3。

互联网摘选

The slowness is dissolve in hydrofluoric acid and hot oil ofvitriols.

缓慢溶于氢氟酸和热浓硫酸.

互联网摘选

Ni-Mo type Hastelloy B alloy has good corrosion resistance in the hydrofluoric acid medium, but it is costly.

Ni Mo型的Hastelloy B合金用于氢氟酸介质中具有优良的耐蚀性能，但成本较高。

互联网摘选

Anhydrous hydrofluoric acid and hydrofluoric acid in aqueous solutions range in appearance from colorless to tinted.

无水氢氟酸和氢氟酸的水溶液的外观在无色到淡颜色之间变化.

互联网摘选

The purity of c – Si3N4 reached 100% after the recovered samples were treated with hydrofluoric acid at 440 K for 9 ― 10 h.

回收样品在440K左右经9～10h与氢氟酸反应处理后，c–Si3N4粉体的纯度接近100%。

互联网摘选

Boron convert into BF4~ with concentrated hydrofluoric acid in advance.

预先用浓氢氟酸将硼转化成氟硼酸根，然后在pH4用氟硼酸根离子选择电极进行测量。

互联网摘选

Exceptions are hydrofluoric, phosphoric acids and concentrated alkalies.

但氢氟酸 、 磷酸和浓碱除外.

互联网摘选

Determination of Iron Oxide and Alumina in Export Phosphorus Rock by ICP-AES of Dissolving Sample with Hydrofluoric Acid

氢氟酸溶样ICP-AES法测定出口磷矿石中氧化铁和氧化铝

互联网摘选

Hydrofluoric acid of Porcelain Etchant and phosphoric acid of UNI-ETCH are severe eye and tissue irritants.

瓷酸蚀剂的氢氟酸和UNI-ETCH的磷酸是一种强烈的眼睛和组织的刺激物.

互联网摘选

The sample is solvated in hydrofluoric acid Boric acid is used for extra hydrofluoric aid.

试样用氢氟酸溶解,硼酸络合过量的氢氟酸.

网络文摘精选

The HP 4500 ICP-MS analysis of trace impurities in concentrated hydrofluoric acid used in semiconductor production was described.

研究了用HP4500型ICP-MS方法分析半导体用浓氢氟酸中的痕量杂质。

互联网摘选

After etching by hydrofluoric acid, PAA hollow microspheres were obtained.

经氢氟酸刻蚀后得到含偶氮苯的PAA中空微球。

互联网摘选

A reaction kinetic model for synthesis of ETBE from ethanol and tertiary butyl alcohol, catalyzed by HF/ USY modified by hydrofluoric acid, was established.

以乙醇和叔丁醇为原料、氢氟酸改性USY分子筛为催化剂合成乙基叔丁基醚，建立了反应动力学模型。

互联网摘选

Steel samples were dissolved with nitric acid, hydrochloric acid and hydrofluoric acid by electrothermal heating or microwave digestion.

钢铁样品用硝酸、盐酸、氢氟酸在电热板上加热或微波消解，溶液经稀释后未经基体分离，未加内标直接用电感耦合等离子体质谱法（ICP-MS）测定。

互联网摘选

A new type filler, PTFE ladder Rasching ring is designed and used in the washing tower of anhydrous hydrofluoric acid equipment, properties of this filler is also analyzed.

设计了1种新型填料―PTFE阶梯拉西环并应用在无水氢氟酸装置的洗涤塔中，分析了该填料的特性。

互联网摘选

Method: Healthy Wistar rats were randomly divided into four groups: hydrofluoric acid burn group, gasoline burn group A, gasoline burn group B, and normal control group, 18 rats in each group.

方法：健康大鼠随机分为氢氟酸烧伤组、汽油烧伤A组和B组、正常对照组。氢氟酸烧伤组致2%Ⅲ度烧伤。

互联网摘选

Hydrofluoric acid ( HF ) is an extremely powerful inorganic acid and a vigorous dehydrating agent.

氢氟酸 是一种极强的无机酸和强脱水剂.

互联网摘选

It has high anti-corrosion for inorganic acid, organic acid and organic solvent except the hydrofluoric acid.

它具有较高的抗腐蚀性能,为无机酸, 有机酸及有机溶剂除氢氟酸.

互联网摘选

Porous silicon layers of different thickness and porosities are obtained using anodization method via controlling the hydrofluoric acid concentration, current density and time. The thick porous silicon layers are oxidized by a two-step oxidation method.

实验过程中通过控制阳极氧化反应中HF溶液的浓度、电流密度和反应时间形成了不同厚度和孔隙度的多孔硅厚膜，并采用两步氧化的方法得到氧化多孔硅厚膜。

互联网摘选

The hydrofluoric acid-hydrochloric acid-nitric acid-vitriol ( HF-HCl-HNO_3-H_2SO_4) system was used for the determination of 15 rare earth elements in the ash of plant by inductively coupled plasma mass spectroscopy ( ICP-MS).

采用高温灰化植物样本，氢氟酸盐酸硝酸硫酸一次溶解植物灰分，电感耦合等离子体质谱法（ICP MS）同时测定15种稀土元素。

互联网摘选