thiourea

Study on Silver Leaching by Thiourea and Discussion of Micromechanism

硫脲浸出银及其机理的探讨

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The polarization action of glue and thiourea make peak current density of copper deposition reaction decrease and make peak potential shift to more negative direction.

Glue和（NH2）2CS的极化作用使铜沉积反应的峰电流密度降低，峰电势负移；

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The preferred orientation of settled nickel layer didn't change with the concentration of thiourea.

另外,沉积层的择优取向不随硫脲浓度的变化而改变.

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Thioureas have been attached great importance because of their special biological activities. A series of novel thiourea derivatives 4a~ 4e and thiosemicarbazide derivatives 5a~ 5e were synthesized by addition reaction of 2-phenyl-1,2,3-triazole-4-formyl isothiocyanate ( 1) with substituted 2-amino benzothiazole and 2-hydrazino benzothiazole respectively.

利用2-苯基-1,2,3-三唑-4-甲酰基异硫氰酸酯与2-氨基取代苯并噻唑和2-肼基取代苯并噻唑的加成反应合成了一系列二取代硫脲和氨基硫脲衍生物。

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Two new compounds , N � �-tetrazolyl-N-substitutedphenoxy acetyl thiourea were synthesized by addition reaction of substitutedphenoxy acetylisothiocyanates with 5-amino-1,2, 3,4-tetrazole.

通过4-氯苯氧乙酸 、 2,4-二氯苯氧乙酸与硫氰酸钾反应合成取代苯氧异硫氰酸酯,再分别与 5- 氨基 -1,2, 3, 4- 四氮唑发生亲核加成反应,合成了2种未见报道的酰基硫脲衍生物.

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The thiourea modified crosslinked chitosan resin can be applied to the separation and purification of proteins.

硫脲修饰交联壳聚糖制备工艺简单，吸附容量较大且容易洗脱，可用作蛋白质分离纯化的吸附剂。

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Electrochemical behavior and kinetics of gold dissolution in alkaline thiourea solution have been investigated electrochemical techniques.

研究了金在碱性硫脲溶液中阳极溶解的电化学行为及动力学.

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There are a quantity of heat released when preparing thiourea dioxide from thiourea and hydrogen peroxide.

双氧水氧化硫脲合成二氧化硫脲的反应是一强放热反应,副反应多,收率不高.

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ORGANIC SYNTHESIS OF CHELATING THIOUREA RESIN AND ITS ADSORPTION PERFORMANCES Basic knowledge of analytical reagents& salts

硫脲盐螯合树脂的合成及其吸附性能

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Synthesis and Crystal Structure of Layer Type Inclusion Compound of Thiourea with Tetraethylammonium Tartrate and Water

硫尿、L-酒石酸根和水为主体晶格的四乙基铵层状包合物的合成及晶体结构

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We used thiourea as the sulfuration reagent of purine C-6 position, easily synthesized 6-thiopurine nucleoside analogues in ethanol under microwave irradiation.

利用硫脲作为嘌呤C-6位的硫化试剂，在乙醇中经微波辐射，简便地合成了6-硫代嘌呤核苷类似物。

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Preparation of formamidine sulphonic acid with thiourea and hydrogen peroxide by aqueous solvent process was researched.

研究了硫脲与双氧水水溶剂法制备甲脒亚磺酸的反应.

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This paper introduces in detail the flotation thiourea leaching process for a sort of gold mine.

阐述了采用浮选&硫脲炭浸一步法处理铜硫砷含量高的某难选金矿石的工艺。

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The value is independent from the initial concentration of Fe3+ and thiourea.

此值大小与溶液中Fe~（3+）及硫脲的初始浓度无关。

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The simultaneous determination of ultra-trace Au 、 Ag 、 Pt and Pd in geological materials by ICP-MS combined with the thiourea resin preconcentration was studied.

研究了硫脲树脂富集，ICP-MS同时测定地质样品中超痕量金、银、铂、钯的方法。

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The results show that the thiourea molecules are inclined to adsorbed on the silver surface.

实验结果表明:硫脲分子倾斜吸附在银表面.

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A new method to synthesize N, N'-diphenyl thiourea ( DPTU) from aniline and CS 2 was developed in the presence of acidic resin as catalyst under reflux temperature for 6 h with the yield of 82.7% and the selectivity of 100%.

探讨了合成二苯硫脲的新方法。以酸性树脂作催化剂在回流温度下使苯胺与CS2反应6h，二苯硫脲的收率达827%，选择性为100%。

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A Study on Adsorption Performance of Thiourea Chelate Resin on Cu~ ( 2+) Ion

硫脲树脂对Cu~（2+）吸附性能研究

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Synthesis of open-chain crown ethers containing thiourea groups(ⅲ)

含硫脲基开链冠醚的合成（Ⅲ）

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The conditions of concentrating Pd with thiourea resin TUR and determining with AAS are given.

本文研究了用聚乙烯苄硫脲螯合树脂富集溶液中的微量元素钯和用原子吸收法测定钯的条件。

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Property of aging-resistant in the thiadiazole system is the best when aging temperature is 150 ℃, but it is better in the peroxide system and is the worst in the thiourea system at this time.

热氧老化温度为150℃时，噻二唑硫化体系的耐老化性能最好，过氧化物硫化体系次之，硫脲硫化体系较差；

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Thiourea or sodium thiosulfate can reduce polymer degradation in RPW solutions.

硫脲和硫代硫酸钠均可减轻污水溶液中聚合物的降解。

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This paper made study on gold extraction by leaching copper anode mud with acidic thiourea solution.

本文研究了用酸性硫脲溶液从铜阳极泥中浸取金的方法.

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Research on thermodynamic criterion of oxidants in gold thiourea leaching

硫脲浸金过程选择氧化剂的热力学判据研究

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Study on Thiourea Dioxide Bleaching Technology of Pulp from Recycled Old Newspaper

回收旧报纸浆的二氧化硫脲漂白工艺研究

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Diphenyl thiourea is an important intermediate of medicine and dyestuff.

二苯硫脲是重要的医药和染料的中间体.

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The results show that saponin has a stronger fixing capacity for heavy metals, and has the same fixing efficiency as thiourea and tertiary sodium phosphate.

经重金属毒性浸出试验表明，茶皂素对飞灰中的重金属具有较强的束缚能力，其稳定化效果与硫脲和磷酸钠螯合剂能力相当。

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And it was found that the best combined bleaching process it is hydrogen peroxide → thiourea dioxide.

在此基础上,进一步优化维纶基牛奶纤维双漂工艺,发现双氧水→二氧化硫脲漂白法效果最佳.

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A new process, urea-calcium cyanamide method, for producing thiourea from urea and hydrogen sulfide is proposed.

利用尿素和硫化氢等原料制备硫脲, 提出了尿素 - 氰氨化钙法新工艺.

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Determination of Trace Gold in geology Water by Thiourea Model Resin Preconcentration-Graphite Furnace Atomic Absorption Spectrometry

硫脲型树脂富集-石墨炉原子吸收光谱测定地质水中痕量金

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