Through hydrotreating, the poor-quality long residue or short residue from CDU can be up-graded in-to good feedstock for heavy oil FCCU. Therefore, the production of light fuel oil can be maximized.

From the point of nutrition, liquid food in gastrointestinal tract residue time is short, nutrition haven't fully absorb is metabolic away.

SPRAYWASH does not attack any material in common use, and evaporates completely after a short time without leaving any residue.