O-Alkylation Chemistry of Coal and Its Implications for the Chemical and Physical Structure of Coal

Journal of Organic Chemistry

Volumn 46, Issue 2, 1981, Pages 277-283

  Liotta, R ^a   Rose, K ^a   Hippo, E ^a  

^a EXXONMOBIL UPSTREAM RESEARCH COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 33845557407     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo00315a010     Document Type: Article

References (19)

1. Liotta, R. Fuel 1979, 58, 724.
2. Friedman, S.; Kaufman, M. L.; Steinger, W. A. and Wender, I. Fuel 1961, 40, 33.
3. Blom, L.; Edelhausen, L.; Van Krevelen, D. W. Fuel 1957, 38, 537.
4. Abdel-Baset, Z.; Given, P. H.; Yarzab, R. F. Fuel. 1978, 57, 84.
5. Liotta, R., unpublished results.
6. Hodek, W.; Meyer, F.; Rolling, G. ACS Symp. Ser. 1977, No. 55, 411.
7. Reference 5, page 408.
8. Heredy, L. A.; Neuworth, M. B. Fuel 1962, 41, 221.
9. See ref 5, Chapter 25.
10. The O-heptylation of Rawhide coal was found to be complete in about 30 h.
11. Retcofsky, H. L.; Schweighardt, F. K.; Hough, M. Anal. Chem. 1977, 49, 585.
12. Maekawa, Y.; Yoshida, T.; Yoshida, Y. Fuel 1979, 58, 864.
13. Carbon-13 NMR spectra were accumulated on a HEOL FX-90Q spectrometer under gated proton decoupling for NOE suppression. Acquisition conditions were chosen which consistently provide quantitative results, including a delay between pulses at 2.5X and a O.8-data acquisition period in the gated decoupling sequence. Tetramethylsilane and O.035 M chromiumflll) acetylacetonate were also added to 2 mL of chloroform-d solutions of the coal extracts. Overnight accumulations were generally used to obtain good signal to noise ratios.
14. Rose, K. D.; Melchior, M. T.; Elliott, J. J., submitted for publication in Anal. Chem.
15. Service performed by Quantachrome.
16. Gan, H.; Nandi, S. P.; Walker, P. L. Fuel 1972, 51, 272.
17. Juntgen, H. Carbon 1978, IS, 273.
18. A known amount of excess tetra-n-butylammonium hydroxide base is mixed with the coal, and then a standard HC1 solution is used to back-titrate. A pH meter was employed to follow the neutralization to the end point.
19. Van Krevelen, D. W. “Coal”; Elsevier: New York, 1961; Chapter IX.