The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
Fang-hei Tsau - One of the best experts on this subject based on the ideXlab platform.
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trimethyl borate regenerated from spent sodium borohydride after hydrogen production
Industrial & Engineering Chemistry Research, 2010Co-Authors: Binghung Chen, Jie Ren Ku, Fang-hei TsauAbstract:Sodium Metaborate (NaBO2) is the hydrolysate of sodium borohydride (NaBH4) for hydrogen production. Trimethyl borate (B(OCH3)3), the major reactant for producing sodium borohydride via the Brown−Schlesinger process, is successfully regenerated from sodium Metaborate (NaBO2) via a sequential process including reacting with sulfuric acid, cooling crystallization, and reactive esterification distillation. The Metaborate is first converted to boric acid (H3BO3) by reacting with sulfuric acid, bypassing formation of borax (Na2B4O7·10H2O) required in a conventional process. Cooling crystallization is utilized to separate and purify boric acid from coexisting sodium sulfate (Na2SO4). Subsequently, trimethyl borate is formed via esterification of boric acid with methanol, in which reactive esterification distillation is adopted to facilitate the esterification and purify the product. Formation of boric acid and trimethyl borate is confirmed with X-ray diffraction (XRD) analysis, Fourier transform infrared spectro...
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trimethyl borate regenerated from spent sodium borohydride after hydrogen production
Industrial & Engineering Chemistry Research, 2010Co-Authors: Cheng Hong Liu, Binghung Chen, Duujong Lee, Fang-hei TsauAbstract:Sodium Metaborate (NaBO2) is the hydrolysate of sodium borohydride (NaBH4) for hydrogen production. Trimethyl borate (B(OCH3)3), the major reactant for producing sodium borohydride via the Brown−Sc...
A. Nusret Bulutcu - One of the best experts on this subject based on the ideXlab platform.
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Solubility of Sodium Perborate Tetrahydrate in Water and Sodium Metaborate Solutions
Journal of Chemical & Engineering Data, 1996Co-Authors: G. Yildiz Yuksel, And Sibel Titiz, A. Nusret BulutcuAbstract:The solubilities of sodium perborate tetrahydrate were measured in water and sodium Metaborate solutions as a function of the temperature. The results obtained in the temperature range (11 to 30) °C in the solutions containing sodium Metaborate at concentrations up to 5 mass % were compared with previous work.
Wei Zheng - One of the best experts on this subject based on the ideXlab platform.
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evaluation the performance of sodium Metaborate as a novel alkali in alkali surfactant polymer flooding
Journal of Industrial and Engineering Chemistry, 2013Co-Authors: Fuzhen Chen, Hanqiao Jiang, Xiaohu Bai, Wei ZhengAbstract:Abstract Sodium Metaborate, a novel alkali, is introduced into alkali/surfactant/polymer (ASP) flooding to solve the negative effects caused by conventional alkalis. Sodium Metaborate can reduce the adsorption loss of the surfactant as well as the interfacial tension (IFT). Weak alkali sodium Metaborate causes less viscosity reduction compared with strong alkalis. Scale precipitation study shows that sodium Metaborate can be effective to avoid the scale precipitation damage. Study results indicate that sodium Metaborate result in the highest oil recovery of 56% compared with sodium carbonate and sodium hydroxide, and at the same time avoid the problems caused by conventional alkalis.
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Evaluation the performance of sodium Metaborate as a novel alkali in alkali/surfactant/polymer flooding
Journal of Industrial and Engineering Chemistry, 2013Co-Authors: Fuzhen Chen, Hanqiao Jiang, Xiaohu Bai, Wei ZhengAbstract:Abstract Sodium Metaborate, a novel alkali, is introduced into alkali/surfactant/polymer (ASP) flooding to solve the negative effects caused by conventional alkalis. Sodium Metaborate can reduce the adsorption loss of the surfactant as well as the interfacial tension (IFT). Weak alkali sodium Metaborate causes less viscosity reduction compared with strong alkalis. Scale precipitation study shows that sodium Metaborate can be effective to avoid the scale precipitation damage. Study results indicate that sodium Metaborate result in the highest oil recovery of 56% compared with sodium carbonate and sodium hydroxide, and at the same time avoid the problems caused by conventional alkalis.
Binghung Chen - One of the best experts on this subject based on the ideXlab platform.
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trimethyl borate regenerated from spent sodium borohydride after hydrogen production
Industrial & Engineering Chemistry Research, 2010Co-Authors: Binghung Chen, Jie Ren Ku, Fang-hei TsauAbstract:Sodium Metaborate (NaBO2) is the hydrolysate of sodium borohydride (NaBH4) for hydrogen production. Trimethyl borate (B(OCH3)3), the major reactant for producing sodium borohydride via the Brown−Schlesinger process, is successfully regenerated from sodium Metaborate (NaBO2) via a sequential process including reacting with sulfuric acid, cooling crystallization, and reactive esterification distillation. The Metaborate is first converted to boric acid (H3BO3) by reacting with sulfuric acid, bypassing formation of borax (Na2B4O7·10H2O) required in a conventional process. Cooling crystallization is utilized to separate and purify boric acid from coexisting sodium sulfate (Na2SO4). Subsequently, trimethyl borate is formed via esterification of boric acid with methanol, in which reactive esterification distillation is adopted to facilitate the esterification and purify the product. Formation of boric acid and trimethyl borate is confirmed with X-ray diffraction (XRD) analysis, Fourier transform infrared spectro...
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trimethyl borate regenerated from spent sodium borohydride after hydrogen production
Industrial & Engineering Chemistry Research, 2010Co-Authors: Cheng Hong Liu, Binghung Chen, Duujong Lee, Fang-hei TsauAbstract:Sodium Metaborate (NaBO2) is the hydrolysate of sodium borohydride (NaBH4) for hydrogen production. Trimethyl borate (B(OCH3)3), the major reactant for producing sodium borohydride via the Brown−Sc...
Sabriye Pişkin - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of nanometric β-barium Metaborate powder from different borate solutions by ultrasound-assisted precipitation
Research on Chemical Intermediates, 2013Co-Authors: Eymen Akşener, Aysel Kantürk Figen, Sabriye PişkinAbstract:In this study, the synthesis of barium Metaborate powder (BaB2O4) was carried out by ultrasound-assisted precipitation using different borate solutions. Different solutions such as borax (Na2B4O7, BD), boric acid (H3BO3, BA), and sodium Metaborate (NaBO2, SMB) were used in the synthesis and an ultrasonic immersion horn probe was used as the major source of ultrasound. The effect of reaction temperature and time, pH, and crystallization time on the BaB2O4 yield (%) was investigated. The ultrasound-assisted synthesis up to 90 % yield could be achieved using a 0.2 M BD solution at 80 °C, reacting for 5 min at pH 13 followed by 2 h of crystallization. Following crystallization, the obtained powder was heated up to 140, 250, 650, and 750 °C for 2.5 h, and it was shown that β-BaB2O4 nanometric powders were obtained after the 750 °C heat treatment.
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Production of sodium Metaborate tetrahydrate (NaB(OH)4·2H2O) using ultrasonic irradiation
Powder Technology, 2011Co-Authors: Muge Sari Yilmaz, Aysel Kantürk Figen, Sabriye PişkinAbstract:Abstract Sodium Metaborate, a derivative of the borax compound, has a wide range of industrial applications. Recently, it is used as a source of boron in the production of sodium borohydride (NaBH 4 ), which is a medium for hydrogen storage. In the present study, sodium Metaborate tetrahydrate (SMT, NaB(OH) 4 ·2H 2 O) was produced by the reaction of borax (B) with the sodium hydroxide (SH) solution under ultrasonic irradiation. The effect of the reaction parameters (amount of water, temperature, particle size, and time) on the production of sodium Metaborate tetrahydrate was investigated in the present study. It was shown that the reaction parameters (amount of water, temperature, and time) played a significant role in the synthesis of sodium Metaborate tetrahydrate. In addition, the concentration of characteristic B–O group in the reaction solution was quantitatively determined by Fourier Transform Infrared Spectroscopy (FTIR). The optimum condition for the production process included 26% water by weight, borax particles of size −250+150 μm and irradiation time of 60 min at 80 °C.
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Parametric investigation on anhydrous sodium Metaborate (NaBO2) synthesis from concentrated tincal
Advanced Powder Technology, 2010Co-Authors: Aysel Kantürk Figen, Sabriye PişkinAbstract:Abstract In this study, anhydrous sodium Metaborate (NaBO 2 ), an industrial and technologically important boron compound, synthesis from concentrated tincal (CT) was carried out. Experiments with different temperature and time were performed in the parametric investigation to map out the reaction mechanism. Crystalline phase characterization of Metaborates products indicates that anhydrous NaBO 2 synthesis from CT occurred at 400 °C with 5 h of reaction conditions. At the end of synthesis, the obtained anhydrous NaBO 2 product can be used in many fields without having the calcination step due to the advantages of this method.