Trimethyl borate regenerated from spent sodium borohydride after hydrogen production

Cheng Hong Liu, Bing Hung Chen, Duu Jong Lee, Jie Ren Ku, Fanghei Tsau

研究成果: Article

11 引文 (Scopus)

摘要

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 (H 3BO3) 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 (Na 2SO4). 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 spectroscopy (FT-IR), and gas chromatography (GC). Approximately 55% of sodium metaborate could be converted to boric acid, along with a production yield from 74.1% to 96.5% realized for trimethyl borate esterified from the as-produced boric acid.

原文English
頁(從 - 到)9864-9869
頁數6
期刊Industrial and Engineering Chemistry Research
49
發行號20
DOIs
出版狀態Published - 2010 十月 20

指紋

Boric acid
Hydrogen production
Sodium
Esterification
Crystallization
Sulfuric acid
Distillation
Cooling
Sodium borate
Sodium sulfate
Gas chromatography
X ray diffraction analysis
Fourier transform infrared spectroscopy
Methanol
Borates
trimethyl borate
boric acid
sodium borohydride
sodium borate

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

引用此文

Liu, Cheng Hong ; Chen, Bing Hung ; Lee, Duu Jong ; Ku, Jie Ren ; Tsau, Fanghei. / Trimethyl borate regenerated from spent sodium borohydride after hydrogen production. 於: Industrial and Engineering Chemistry Research. 2010 ; 卷 49, 編號 20. 頁 9864-9869.
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abstract = "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 (H 3BO3) 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 (Na 2SO4). 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 spectroscopy (FT-IR), and gas chromatography (GC). Approximately 55{\%} of sodium metaborate could be converted to boric acid, along with a production yield from 74.1{\%} to 96.5{\%} realized for trimethyl borate esterified from the as-produced boric acid.",
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Trimethyl borate regenerated from spent sodium borohydride after hydrogen production. / Liu, Cheng Hong; Chen, Bing Hung; Lee, Duu Jong; Ku, Jie Ren; Tsau, Fanghei.

於: Industrial and Engineering Chemistry Research, 卷 49, 編號 20, 20.10.2010, p. 9864-9869.

研究成果: Article

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AB - 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 (H 3BO3) 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 (Na 2SO4). 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 spectroscopy (FT-IR), and gas chromatography (GC). Approximately 55% of sodium metaborate could be converted to boric acid, along with a production yield from 74.1% to 96.5% realized for trimethyl borate esterified from the as-produced boric acid.

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