Next generation purification method for achieving low trace metals in ultra-high purity chemicals

2021 ◽  
Author(s):  
Majid Entezarian ◽  
Mitsuaki Kobayashi ◽  
Yukihisa Okada ◽  
Takaaki Shirai ◽  
Keita Abe ◽  
...  
Keyword(s):  
Trace Metals ◽  
High Purity ◽  
Next Generation ◽  
Purification Method ◽  
Ultra High Purity

scholarly journals Purification Method for Achieving Low Trace Metals in Ultra-High Purity Chemicals

2021 ◽  
Vol 34 (2) ◽  
pp. 205-211
Author(s):  
Mitsuaki Kobayashi ◽  
Yukihisa Okada ◽  
Takaaki Shirai ◽  
Osamu Sawajiri ◽  
Robert Gieger ◽  
...  
Keyword(s):  
Trace Metals ◽  
High Purity ◽  
Purification Method ◽  
Ultra High Purity

scholarly journals Preparation of 6N,7N High-Purity Gallium by Crystallization: Process Optimization

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2549 ◽  
Author(s):  
Jianfeng Hou ◽  
Kefeng Pan ◽  
Xihan Tan
Keyword(s):  
Water Temperature ◽  
Flow Rate ◽  
High Purity ◽  
Crystallization Process ◽  
Cooling Water ◽  
Crystallization Rate ◽  
Purification Method ◽  
Cooling Water Temperature ◽  
Ultra High Purity ◽  
Crystal Seed

In this study, radial crystallization purification method under induction was proposed for preparing 6N,7N ultra-high purity gallium crystal seed. The effect of cooling temperature on the morphology of the crystal seed, as well as the cooling water temperature, flow rate, and the addition amount of crystal seed on the crystallization process was explored, and the best purification process parameters were obtained as follows: temperature of the crystal seed preparation, 278 K; temperature and flow rate of the cooling water, 293 K and 40 L·h−1, respectively; and number of added crystal seed, six. The effects of temperature and flow rate of the cooling water on the crystallization rate were investigated. The crystallization rate decreased linearly with increasing cooling water temperature, but increased exponentially with increasing cooling water flow. The governing equation of the crystallization rate was experimentally determined, and three purification schemes were proposed. When 4N crude gallium was purified by Scheme I, 6N high-purity gallium was obtained, and 7N high-purity gallium was obtained by Schemes II and III. The purity of high-purity gallium prepared by the three Schemes I, II, and III was 99.999987%, 99.9999958%, and 99.9999958%, respectively.

scholarly journals Dihydronicotinamide riboside: synthesis from nicotinamide riboside chloride, purification and stability studies

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 21036-21047
Author(s):  
Amin Zarei ◽  
Leila Khazdooz ◽  
Mojtaba Enayati ◽  
Sara Madarshahian ◽  
Timothy J. Wooster ◽  
...  
Keyword(s):  
High Purity ◽  
Stability Studies ◽  
Purification Method ◽  
Nicotinamide Riboside

A convenient and scalable method for synthesis of dihydronicotinamide riboside (NRH) from the commercially available nicotinamide riboside chloride (NRCl) is elaborated as well as a fast purification method that led to high purity NRH.

3D-SIMS analysis of ultra high purity molybdenum and tungsten: a characterisation of different manufacturing techniques and products

1995 ◽  
Vol 353 (5-8) ◽  
pp. 524-532 ◽  
Author(s):  
Peter Wilhartitz ◽  
R. Krismer ◽  
H. Hutter ◽  
M. Grasserbauer ◽  
S. Weinbruch ◽  
...  
Keyword(s):  
High Purity ◽  
Ultra High Purity ◽  
Sims Analysis ◽  
Manufacturing Techniques ◽  
And Tungsten

scholarly journals A New Method for Cleaning the Surface of Ultra High-Purity Iron by High-Purity Ozone Exposure and UV Irradiation

1997 ◽  
Vol 38 (5) ◽  
pp. 451-456 ◽  
Author(s):  
Shigeru Suzuki ◽  
Shingo Ichimura ◽  
Akira Kurokawa ◽  
Yukio Ishikawa ◽  
Minoru Isshiki ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
High Purity ◽  
New Method ◽  
Ozone Exposure ◽  
Ultra High Purity ◽  
Purity Iron ◽  
High Purity Iron

Influence of surface condition on the corrosion of ultra-high-purity Mg alloy wire

2016 ◽  
Vol 108 ◽  
pp. 66-75 ◽  
Author(s):  
Sean Johnston ◽  
Zhiming Shi ◽  
Matthew S. Dargusch ◽  
Andrej Atrens
Keyword(s):  
High Purity ◽  
Surface Condition ◽  
Mg Alloy ◽  
Alloy Wire ◽  
Ultra High Purity

scholarly journals Solvent Extraction ICP-MS/MS Method for the Determination of REE Impurities in Ultra-high Purity Ce Chelates

2019 ◽  
Vol 40 (5) ◽  
pp. 167-172 ◽  
Author(s):  
Yan Zhang ◽  
Zhongben Pan ◽  
Pengchong Jiao ◽  
Jia Ju ◽  
Ting He ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
High Purity ◽  
Ultra High Purity ◽  
Icp Ms
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