PFO(pyrolized fuel oil) and C10+ oil, which are the residual heavy oils form a NCC(naphtha cracking center), were heat-treated to produce the precursor-pitch for carbon materials. After PFO was initially distilled near 300℃ to separate the volatile matters recovering as high-quality fuel oil, the residuum of nonvolatile precursor-pitch was then thermally pyrolized in the temperature ranges from 350℃ to 450℃. Spinnable isotropic pitch with the softening point of 200℃ and the toluene insolubles of 36wt% was obtained at 365℃, and then was successfully spun through a spinneret(0.5mm diameter). After spinning, an isotropic carbon fiber of 25μm diameter was obtained via oxidation and craboniation procedures. Mesophase spherules began to be observed from the product pitch pyrolized at 400℃, and bulk mesophase with a flow texture was observed above 420℃. In the case of C10+ was the feed was polymerized in the presence H2SO4 at room temperature to increase the molecular weight and then heat-treated gradually up to 200~250℃. The products obtained with the softening point of 80~190℃ were carbonized at 500 and 1000℃ to examine the morphology.

정유산업 방출폐수를 재처리하여 양질의 공업용수로 활용하고자 역삼투막 및 공정으로 구성된 재활용 system을 고안하여 현장 pilot 실험을 수행하였다. 생산공정 운전상황에 따라 불규칙적으로 변하는 폐수 특성에도 불구하고 역삼투막의 경우 10~15kg/cm2 의 운전압력 범위내에서 96~99%정도의 비교적 높은 염배제율을 보였으며 본 실험을 통하여 얻은 재생수의 경우 냉각탑 공급용수로써의 충분한 가능성을 보여 주었다. 그러나 본 연구에서 제안 사용된 여과형 전처리 공정만으로는 충분한 처리효율을 기대하기 어려웠으며, 이는 각 여과공정법 처리수의 수질분석 결과 및 NaOH를 이용한 역삼투막 세정 결과로부터 쉽게 확인되었다.