DOI: 10.1016/s0040-4039(02)01620-9. Complete and truly catalytic degradation method of PCBs using Pd/C–Et3N system under ambient pressure and temperature

Complete and truly catalytic degradation method of PCBs using Pd/C–Et3N system under ambient pressure and temperature

10.1016/s0040-4039(02)01620-9

Crossref journal-article

Elsevier BV

Tetrahedron Letters (78)

Bibliography

Sajiki, H., Kume, A., Hattori, K., Nagase, H., & Hirota, K. (2002). Complete and truly catalytic degradation method of PCBs using Pd/CâEt3N system under ambient pressure and temperature. Tetrahedron Letters, 43(40), 7251â7254.

Authors 5

Hironao Sajiki (first)
Akira Kume (additional)
Kazuyuki Hattori (additional)
Hisamistu Nagase (additional)
Kosaku Hirota (additional)

References 32 Referenced 59

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Erickson, M. D. Analytical Chemistry of PCBs; 2nd ed.; CRC Press: Boca Raton, 1997; pp. 1–96
Inventory of world-wide PCB destruction capacity, first issue, December 1998 The Environment Programme of the United Nations (http://irptc.unep.ch/pops/pdf/pcbrpt.pdf).
10.1039/cs9952400423 / Chem. Soc. Rev. by Hitchman (1995)
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Roach, J. A. G. In PCBs and the Environment; Waid, J. S., Ed.; CRC Press: Boca Raton, 1986, Chapter 10
10.1002/ep.670110310 / Environ. Prog. by Amend (1992)
For examples: (a) Spatola et al. reported5a,b an effective dechlorination method using catalytic transfer hydrogenation (CTH) with Pd/C–HCO2NH4 combination. However, the degradation of 0.44 g of Aloclor 1254 required 0.44 g of 10% Pd/C and 3 g of HCO2NH4; (b) Tundo et al. also reported5c an applicable dechlorination method using catalytic hydrogenation with a Pd/C–H2 system. However, the degradation of Aroclor 1254 required a 50% KOH aqueous solution and bubbling H2 gas (1 mL/min).
10.1016/S0040-4039(02)01622-2 / Tetrahedron Lett. by Sajiki (2002)
After two vacuum/H2 cycles to remove air from a round-bottom flask or a high-pressure glass cylinder (Hyper Glass Cylinder, Taiatsu Techno Co.), a vigorously stirred mixture of the PCBs (50 mg∼50 g), 10% Pd/C (10% of the weight of the PCBs) and triethylamine (1.2 equiv. for each mol of chlorine in the PCBs) in methanol (up to 40% solution of PCBs) was hydrogenated (H2 balloon for a round-bottom flask and 1 atm of H2 for a high-pressure glass cylinder) at ambient temperature (ca. 20°C) for 1∼6 h. The reaction mixture was filtered using a membrane filter (Advantec Dismic-13HP, 0.45 mm) or Celite® cake and the filtrate was evaporated to dryness. The residue was partitioned between hexanes and water, and the organic layer was dried over anhydrous magnesium sulfate. After filtration, the organic solvents were evaporated to afford biphenyl quantitatively. The products of the hydrodechlorination were analyzed by GC/MS (Hewlett Packard, Model 5972A, measurable limit=approx. 0.5 ppm) and 1H NMR (JEOL, EX-400). Further, the aqueous layer was evaporated to dryness to afford triethylammonium chloride also quantitatively.

Dates

Type	When
Created	22 years, 5 months ago (March 25, 2003, 8:14 p.m.)
Deposited	3 years, 2 months ago (June 24, 2022, 8:39 p.m.)
Indexed	1 year, 3 months ago (May 29, 2024, 5:05 a.m.)
Issued	23 years ago (Sept. 1, 2002)
Published	23 years ago (Sept. 1, 2002)
Published Print	23 years ago (Sept. 1, 2002)

Funders 0

None

BibTeX

@article{Sajiki_2002, title={Complete and truly catalytic degradation method of PCBs using Pd/C–Et3N system under ambient pressure and temperature}, volume={43}, ISSN={0040-4039}, url={http://dx.doi.org/10.1016/s0040-4039(02)01620-9}, DOI={10.1016/s0040-4039(02)01620-9}, number={40}, journal={Tetrahedron Letters}, publisher={Elsevier BV}, author={Sajiki, Hironao and Kume, Akira and Hattori, Kazuyuki and Nagase, Hisamistu and Hirota, Kosaku}, year={2002}, month=sep, pages={7251–7254} }

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