Demetallization of heavy vacuum fraction

Gryglewicz, S.; Rutkowski, M.; Steininger, M.

doi:10.1016/0378-3820(91)90053-f

Cited by 8 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An alternative process for metal removal is hydrodemetallization (HDM). It has been shown that the most active HDM catalysts are those prepared from synthetic aluminum oxide or natural aluminum silicate enriched with the oxides of nickel, cobalt, and molybdenum, , and their catalytic performance has been studied extensively. , The natural aluminosilicate activated with sulfuric acid solution was found to be best at removing vanadium and nickel. , Most crude oils contain trace amounts of nickel, vanadium, and other metals which have damaging impact during downstream catalytic conversion processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of the Thermal Cracking Product Quality of Heavy Vacuum Residue Using Solvent Deasphalting Pretreatment

et al. 2016

View full text Add to dashboard Cite

In this work we used the vacuum distillation residue from an Iranian heavy crude oil refinery in a solvent deasphalting (SDA) process using different temperatures (60–120 °C), pressures (5–9 bar), solvents (n-pentane and ethyl acetate), and solvent to feed ratios (3 to 1, 5 to 1, and 7 to 1). The resulting products included deasphalted oil (DAO) and residue (PITCH). The DAO yields in SDA when n-pentane was used as solvent were significantly higher than those when ethyl acetate was used as solvent. The DAO was subsequently processed by thermal cracking at 500 °C and atmospheric pressure to investigate the effect of solvent deasphalting processing conditions on the yield of coke and liquid products as well as the metal and sulfur content of the produced coke. The results indicated that SDA effectively removed up to 45% of vanadium and up to 40% of nickel from the vacuum residue. Simulated distillation (SimDis) results of the liquid products of thermal cracking of DAO indicated that for both n-pentane and ethyl acetate as the SDA solvent, an increase in the solvent to feed ratio resulted in increased amount of lighter compounds (C5–C20) of the liquid products.

show abstract

Section: Introductionmentioning

confidence: 99%

“…38,39 The natural aluminosilicate activated with sulfuric acid solution was found to be best at removing vanadium and nickel. 22,40 Most crude oils contain trace amounts of nickel, vanadium, and other metals which have damaging impact during downstream catalytic conversion processes.…”

Section: Introductionmentioning

confidence: 99%