The extraction of raw material (gas, hydrocarbon) and hazard contaminants (ash, heavy metals, poly-aromatic hydrocarbons, organic associate minerals, OAM) from bituminous and lignitic coal, are challenge processes in regards of adding economical value at coal energy content. Supercritical fluid extraction, SFE (high pressure/temperature dependent) and modified Soxhlet, Sx (solvent density dependent) technologies had dominated organic and associated minerals extraction on coal for long time ago, however parallel methods till shows similar results as those obtained with these technologies, so new methods to address the short stage for hazard contaminants extraction are highly in needs. Improvements in a highly thermochemical method termed semi critical assisted- solvent extraction (SmCA-S) is reported herein, which applies for a broad scope of technological, scientific, and academic fields in regards of extract/separate biodiesel, ash, metal ions, and polyaromatic hydrocarbon from different kind of sources. Therefore, an innovation has been designed to carried out SmCA-S experiments, which we hypothesize works to generate a laminar flow, with the fluid being composed by a biphasic state (gas/liquid) that coexists in isothermal equilibrium. The novel aspect of the innovation is related with facile operation, less time and solvent consume, and most important in situ thermodynamic property measurements (temperature, polarity, pressure, pH), impossible to be determinate either using Soxhlet, Gregar or Soxtec glassware extractors.