from first principles PP-I-1

PP-III-1Low-Level Hydrocracking of Mixture of Baku Vacuum Strippings withLight Gasoil of CokingAbad-zade Kh.I. 1 , Ibragimov R.H. 2 , Mukhtarova G.S. 2 , Piriyev N.N. 1 , Qadirov Kh.Q. 1 ,Mamedov Z.Sh. 11 Azerbaijan Metanol Company (AzMeCo), Baku, Azerbaijan2 The Yu.H. Mamedaliyev Institute of Petrochemical Processes of NAS of Azerbaijan, Baku,Azerbaijanxaqiqat.abadzade@rambler.ruThe process of retarded coking which effectively refines petroleum residues is considered asone of the perspective processes of deepening petroleum refining.At present the trend for further increasing capacities of the retarded coking plants is outlined.However, the gasoil fractions produced in the process, the yield of which makes 50-60 %,have a low stability and a tendency for resinification upon storage that is stipulated by anincreased content of unsaturated and diene hydrocarbons in their composition. Nowadays theyare mainly used as components of fuel oil which is economically inexpedient.Large yields and significant resources of gasoil fractions of coking, an increase of demand indiesel fuel caused by enhancement of machine-stock dieseling necessitates their qualified usein oil refinery scheme.Taking this into account, on the industrial GKD-205 catalyst there have been carried outresearches of low-level hydrocracking of mixture of Baku vacuum strippings with light gasoilof coking at 85:15 ratio with the purpose of obtaining ecologically clean diesel fuel and lowsulphurfeed-stock for catalytic cracking. The experiments were conducted at T = 410-430 o C,P = 6.0 MPa, bulk speed of feed-stock delivery 1.0 h -1 at a flow-type model installation.The analysis of the obtained results shows that an increase in the diesel fraction yield makes30-35 %, total yield equaleing 50-55 %.The produced diesel fuels with cetane number 49 points, aromatic hydrocarbons content 20 %and sulphur content 0.004 % wt. surpass the requirements of TU 38.1011348-99 forecologically clean summer diesel fuels according to all indices.The residue > 360 o C, isolated from the hydrogenation product, in comparison with the initialmuxture has a lower coking capacity, density, sulphur content as well as aromatichydrocarbons content. Therefore, it is an ideal feed-stock for catalytic cracking process.152