A process for preparing a low ash coal wherein coal is depolymerized at low temperature by contacting finely divided coal with a hard acid and soft base, and extracting the depolymerized coal to remove mineral contaminants.
申请公布号
US5296133(A)
申请公布日期
1994.03.22
申请号
US19920925362
申请日期
1992.08.04
申请人
EXXON RESEARCH AND ENGINEERING COMPANY
发明人
KRAMER, GEORGE M.;LETA, DANIEL P.;LAMBERTI, WILLIAM A.;DISKO, MARK M.;BEHAL, SUTINDER K.;ERNST, EDWIN R.
