Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.
根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。
A range of polymers which are made from sodium sulfide and p-dichlorobenzene.
由硫化钠和对二氯苯制成的一系列聚合物。
Effects of solvent, sodium sulfide dosage, reaction time and reaction temperature in syn thesis of dibenzyl sulfide from benzyl chloride with sodium sulfide without catalyst were studied.
研究了无催化剂存在时，溶剂、硫化钠用量、反应时间和反应温度对从氯化苄和硫化钠合成二苄基硫醚的影响。
The method that the gold concentrate adding sodium sulfide is roasted could effectually raised the recoveries of gold, silver and copper.
该方法是将金精矿加入硫化钠后进行焙烧预处理，可有效地提高金、银、铜的回收率。
A small molecular organic depressant, glyceryl-xanthate sodium, was designed and synthesized, and its behavior in depressing sulfide minerals was investigated by flotation tests.
设计并合成了一种可以抑制硫化矿的小分子有机抑制剂甘油基黄原酸钠，通过浮选试验考察了该抑制剂对硫化矿物的浮选抑制行为。
The present study shows the sodium sulfate has promoting effects on the sulfating roasting of sulfide ore and on the metal leaching of roasted ore.
研究表明：硫酸钠对多金属硫化精矿硫酸化焙烧和浸出具有促进作用。
The term "sulfate" is therefore misleading, since it implies that sulfate is the active cooking agent, whereas it is actually sodium hydroxide and sodium sulfide.
把这种方法叫做“硫酸盐法”是有错的，因为它表示蒸煮液中的活性化学物质是硫酸盐，然而事实上是氢氧化钠和硫化钠。
The method consists of grinding, screening and flotation etc. in order to carry out flotation of copper successfully, xanthate and aerofloat are used as collectors and sodium sulfide as activator.
此法包括粉碎、筛选和浮选等过程。为了成功地实现铜的浮选，用黄药和黑药作捕收剂，硫化钠作活化剂。
The superiority of catalytic hydrogenation reducing to iron and sodium sulfide reducing is showed in both increasing yield and decreasing wastes.
对比说明了加氢法在提高产品收率、减少三废方面明显优于铁粉法和硫化钠法。
Experiment results show that as cooking additive quinone compounds are more suitable for soda cooking without sodium sulfide.
结果表明，醌类蒸煮助剂更适用于无硫化钠存在的烧碱法蒸煮。
Kinetics of the reduction of sodium sulfate to sodium sulfide by hydrogen is studied in this paper.
研究了用氢气还原芒硝制备硫化钠的反应动力学。
Residual lignins from sodium sulfide pretreatment kraft pulping were studied by chemical and spectral methods. Sodium sulfide pretreatment can promote sulfur combining chemically with lignin.
用化学和波谱分析研究了硫化钠预处理硫酸盐制浆中残余木质素的化学结构特性。
These effects are antagonized by sodium sulfide.
这些效果被硫化钠中和了。
Tetrahydrothiophene was synthesized using iodine as a catalyst from 1,4-dichlorobutane and sodium sulfide.
以1，4-二氯丁烷和硫化钠为原料，碘为催化剂，乙醇为溶剂合成了四氢噻吩。
Accelerate industrial sodium sulfide, the product of the transformation and upgrading.
加快硫化钠产业、产品的转型升级。
FTIR result showed that it is the physisorption of the interaction among sodium sulfide, DDA and n-octanol with smithsonite's surface.
红外光谱研究表明，硫化钠、正辛醇、DDA与菱锌矿表面发生物理吸附。
Sodium sulfide spent caustic liquor was treated by wet air oxidation (WAO).
采用湿式空气氧化法处理含硫化钠废碱液。
The results indicate that the contents of sulfur and methoxyl group and the delignification process of sodium sulfide pretreatment kraft pulping are different from those of control pulping.
结果表明，预处理制浆溶出木质素的硫元素与甲氧基含量及脱木质素反应均不同于常规硫酸盐制浆。
With the application of UV spectrophotometry, and solution chemistry method, the reagent removal mechanism of sodium sulfide was studied.
应用紫外吸光光度法和溶液化学的方法研究了硫化钠脱药机理。
The invention relates to a method of producing anhydrous sodium sulfide without pollution.
本发明涉及一种零污染生产无水硫化钠的方法。
The organic solvent adopts methanol, ethanol and isopropyl alcohol, the thiolation agent adopts sodium hydrosulfide, sodium sulfide and thiourea.
所述的有机溶剂采用甲醇、乙醇、异丙醇，巯基化试剂采用硫氢化钠、多硫化钠、硫脲。
Formaldehyde, reaction products with m-phenylenediamine, sodium sulfide and sulfur;
甲醛与间苯二胺、硫化钠和硫的反应产物；
The invention discloses a semi-vertical reverberatory furnace for preparing sodium sulfide and a technique thereof.
本发明公开了一种制备硫化钠的半立式反射炉以及工艺。
The method includes processing steps: testing sodium sulfide content in reaction materials, and carbon content in petroleum coke powder;
该方法的工艺步骤为：检测反应物料中的硫酸钠含量、石油焦粉中碳元素含量；
The rotary film evaporator with heat-conducting oil furnace is a new kind key equipment for the production of sodium sulfide.
导热油炉加热旋转薄膜蒸发器是一种新型的硫化碱生产的关键设备，它由导热油炉与旋转薄膜蒸发器两部分组成。
When heated, it decomposes into sodium sulfate and sodium sulfide.
加热分解为硫酸钠与硫化钠。
The results showed that the activation of sodium sulfide to the smithsonite due to the HS- ion adsorbed on the smithsonite's surface and lead to the zeta potential drop.
结果表明，硫化钠对菱锌矿的活化作用主要通过HS-吸附在菱锌矿表面，降低菱锌矿表面电位实现；
The invention changes traditional process of using coal powder and sodium sulfate to produce sodium sulfide, reduces coal resource consumption;
本发明改变了用煤粉和硫酸钠生产硫化钠的传统工艺，减少煤能源的消耗；
The invention relates to a zero-emission treatment process of O-phenylenediamine sodium sulfide reduction wastewater, which adopts the following steps in sequence: wastewater is filtered;
本发明涉及一种零排放处理邻苯二胺硫化碱还原废水工艺。其工艺步骤依次为：过滤废水；
The invention relates to a zero-emission treatment process of O-phenylenediamine sodium sulfide reduction wastewater, which adopts the following steps in sequence: wastewater is filtered;
本发明涉及一种零排放处理邻苯二胺硫化碱还原废水工艺。其工艺步骤依次为：过滤废水；
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