Skip to main content
SpringerLink
Log in

Quantum-chemical descriptors and the assessment of surface activity in coal flotation

  • Coal
  • Published:
Coke and Chemistry Aims and scope Submit manuscript

Abstract

The activity of reagents in coal flotation may be assessed on the basis of quantum-chemical descriptors. Semiempirical calculations indicate that hard electrophilic centers in the coal surface correspond to carbon atoms with maximum positive charge. The oxygen atoms are nucleophilic centers of complex terephthalates, which are characterized by maximum negative charges and therefore able to form donoracceptor complexes with electrophilic sections of the coal surface. The reaction corresponds to a charge-controlled mechanism.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Medyanik, N.A., Girevaya, Kh.Ya., and Varlamova, I.A., Quantum-Chemical Approach to Selecting the Collection Agent for Coal Flotation, Koks Khim., 2006, no. 1, pp. 8–13.

  2. Pearson, R.G., J. Chem. Sci., 2005, vol. 117, no. 5, pp. 369–377.

    Article  CAS  Google Scholar 

  3. Parr, R.G. and Pearson, R.G., J. Am. Chem. Soc., 1983, vol. 105, p. 7512.

    Article  CAS  Google Scholar 

  4. Parr, R.G., Szentpaly, L., and Liy, S., J. Am. Chem. Soc., 1999, vol. 121, p. 1922.

    Article  CAS  Google Scholar 

  5. Chattaraj, P.K., Maiti, B., and Sarkar, U., J. Phys. Chem., 2003, vol. 107, p. 4973.

    CAS  Google Scholar 

  6. Savinchuk, L.G. and Medyanik, N.L., More Effective Flotation of Low-Metamorphic Coal, Koks Khim., 1995, no. 2, pp. 1–3.

  7. Medyanik, N.L., Savinchuk, L.G., Cherchintsev, V.D., et al., Russian Patent 2019300, Byull. Izobret., 1994, no. 17.

  8. Girevaya, Kh.Ya., More Effective Flotation of Gas-Grade Coal by Quantum-Chemical Selection of Reagents, Extended Abstract of Cand. Sci. Dissertation, Magnitogorsk State Technical University, Magnitogorsk, 2006.

    Google Scholar 

  9. Reutov, O.A., Kurts, A.P., and Butin, K.P., Organicheskaya khimiya (Organic Chemistry), Moscow: BINOM, Laboratoriya znanii, 2005, vol. 1

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia

    N. L. Medyanik

Authors
  1. N. L. Medyanik
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to N. L. Medyanik.

Additional information

Original Russian Text © N.L. Medyanik, 2011, published in Koks i Khimiya, 2011, No. 4, pp. 9–13.

About this article

Cite this article

Medyanik, N.L. Quantum-chemical descriptors and the assessment of surface activity in coal flotation. Coke Chem. 54, 103–107 (2011). https://doi.org/10.3103/S1068364X1104003X

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.3103/S1068364X1104003X

Keywords

Search

Navigation