초록 ▼

Hydrogen conservation in solvent refining of coal is practiced and solvent compositions and adjusted to needs of two stage operation. The first stage is a short residence time dissolution in a recycle solvent rich in phenols and polyaromatics of high boiling range. The solvent is enriched for the se

Hydrogen conservation in solvent refining of coal is practiced and solvent compositions and adjusted to needs of two stage operation. The first stage is a short residence time dissolution in a recycle solvent rich in phenols and polyaromatics of high boiling range. The solvent is enriched for the second stage in low boiling hydrogen donors and the product of the process undergoes hydrotreating in an integrated process.

대표청구항 ▼

A process for solvent refining of coal at reduced hydrogen consumption and reduced production of normally gaseous hydrocarbons which comprises mixing finely divided coal with hydrogen and a solvent derived in the process which contains substantial quantities of polycyclic aromatic hydrocarbons and p

A process for solvent refining of coal at reduced hydrogen consumption and reduced production of normally gaseous hydrocarbons which comprises mixing finely divided coal with hydrogen and a solvent derived in the process which contains substantial quantities of polycyclic aromatic hydrocarbons and phenols during a residence time in a first stage less than about 15 minutes at a temperature of less than about 880°F. to thereby dissolve components of the coal in the solvent, adding to the resultant solution a low boiling hydrogen donor stream derived in the process, reacting the mixture so produced in a second stage under hydrogen pressure for a residence time longer than and a temperature lower than those in the said first stage, separating from the product of said second stage a first fraction containing solids separated from said product, a second fraction consisting essentially of normally liquid components of said product having fourteen or less carbon atoms, hydrogenating a portion of said second fraction under severe conditions to convert monocylic phenols to hydrocarbons and convert polycyclic aromatics to hydrogen donor hydroaromatics, recycling the hydrogenated portion of said second fraction to said second stage as said low boiling hydrogen donor stream, a third fraction containing liquid components of said product which are higher boiling than said second fraction, recycling at least a portion of said third fraction to said first stage as said solvent derived in the process, a fourth fraction constituted by liquid components of said product and corresponding substantially in composition to a mixture of said second and third fractions, subjecting said fourth fraction to hydrotreating under conditions to substantially remove hydroxyl and other functional groups and yield a premium quality fuel and a fifth fraction constituted by normally gaseous components of said product.