BACKGROUND: THE ORGANIC COMPOUND TETRAHYDROFURAN (THF) IS A HETEROCYCLIC COMPOUND MISCIBLE IN WATER, A PRECURSOR TO POLYMERS [1] AND KNOWN AS A VERSATILE SOLVENT. APPLYING DENSITY FUNCTIONAL THEORY WE VERIFY IF THE SUGGESTED STRUCTURES BN-THF STRUCTURES ARE REAL CHEMICAL COMPOUNDS AND EVALUATED A VARIETY OF MOLECULAR CHARACTERISTICS AND THERMOCHEMISTRY FUNCTIONS OF THEIR SOLVATION IN WATER...

The entrapment of Aqueous phase within porous media Can occur in a number of different situations during drilling, completion, work over and production operations. Removing the entrapped aqueous phase (water block) can increase the impaired hydrocarbon relative permeability. In this study, the efficiency of using alcohols in removing water block for increasing hydrocarbon relative permeability and improving oil recovery is examined and the results of laboratory tests are presented.The experimental setup consisted of a stainless steel core holder for cylindrical cores, a displacement pump and a pressure transducer. Outcrop sandstone plug was used in this experiment and we used methanol, ethanol and isopropanol as water block removing agents. The results obtained showed that using methanol and specially ethanol can effectively remove water block and increase oil relative permeability but in the case of isopropanol, not only the oil relative permeability did not increased but it caused a reduction in it.

HECK COUPLING OF ARYL HALIDES WITH ALKENES CAN BE PERFORMED WITH EXCELLENT YIELDS IN ROOM-TEMPERATURE IONIC LIQUIDS, WHICH PROVIDE A MEDIUM THAT DISSOLVES THE PALLADIUM CATALYST AND ALLOWS THE PRODUCT AND BYPRODUCTS TO BE EASILY SEPARATED....