Vacuum gasoil

Feed oils. Crude from the Wilmington oil field in California was distilled into four fractions of vacuum gasoil boiling between 360-502 (No. ), 381- 96 (No. 5), (No. 6) and 83-73% off at 5 80C (No. 7). 

From an FCC viewpoint, there is not a clear definition of resid cracking. If we consider the overall refinery scheme, all materials not qualifying for gas oil type specifications are resid, which in fact means that the traditional FCC feed, Vacuum Gasoil (VGO), is nearly 100% resid, or to be more specific a fuel oil. 

VG0 Cracking - Vacuum Gasoil clear, no metals - Vacuum Flashed distillate from atmospheric resid... 

It becomes clear that significant conversion benefits can be obtained by increasing the activity contribution in the meso pore range (about 20 to 200 Angstrom diameter) in a catalyst,Table IV. Results obtained from testing various catalysts with Vacuum gasoil (VGO) and Atmospheric Residue (AR) confirm that indicated improvement of FCC conversion. 

Hydrocracking Vacuum gasoils Gasoline Middle Pd/HFAU... 

Catalytic cracking is probably the most important conversion unit in modem refineries. Essentially, catalytic cracking involves the C-C bond rupture of hydrocarbons contained in the feedstock (typically a vacuum gasoil) to produce more valuable low molecular weight hydrocarbons including light olefins for petrochemistry, gasoline, and diesel. 

Feed vacuum gasoil. Radiotracer " C-labelled dotriacontane. 

Feed and catalysts. A regular Kuwait vacuum gasoil was used as a feed. Its characteristics can be found in Table II. Three commercial cracking catalysts with an increasing rare earth and alumina content, viz. A, B, and C, were tested. All catalyst were presteamed and deactivated to an equilibrium level by its supplier. Larger catalyst particles were removed with a 150 pm sieve. This step is followed by either a calcination or regeneration. Fresh, but pre-steamed catalyst was calcined at 773 K for 1 h, while coked catalyst was regenerated at 873 K for 2 h. 

Application To selectively convert vacuum gasoils, paraffinic residual feedstocks and resulting blends of each into C -C olefins, aromatic-rich, high-octane gasoline and distillate using the Deep Catalytic Cracking (DCC) process. 

China Petrochemical Technology Co., Ltd. Ethylene Ethane to heavy-vacuum gasoil CBL cracking technology is a steam-cracking technology developed by SINOPEC. 44 NA... 

China Petrochemical Technology Co., Ltd. Propylene or Iso-olefln Vacuum gasoil (VGO), vacuum resid orVGO blended with deasphalted oil Deep catalytic cracking (DCC) conversion technology, produces light olefins (ethylene, propylene and butylenes), LPG, gasoline, middle distillates, etc., from hydrocarbon feedstocks NA NA... 

Diisopropyl Benzene Triisopropyl- Benzene Vacuum Gasoil ... 

Vacuum gasoil and heavier fractions have to be hydroprocessed to remove contaminants such as sulfru, nitrogen and metals. They can also be hydrocracked to obtain light and heavy naphtha, jet fuel (kerosene) and desel. Even if the heavy fractions are to be hydrocracked they have always to be treated to eliminate S and N by a hydrodesulfuration (HDS) and hydrodenitrification (HDN) process. 

Figurel4.1 Examples of Hg pore-size distributions of catalysts used fordiesel (red), vacuum gasoil (VGO) (gray), and residue (blackand green) hydrotreatment.

Corma A, Martinez A, Martinez Soria V, Monton JB Hydrocracking of vacuum gasoil on the novel mesoporous MCM-41 aluminosilicete catalyst J Catal 1995, 53 25-31. 

Vacuum gasoil and hot catalyst (about 650-750 °C) are mixed, and after vaporization and heating of the oil (whereby the catalyst cools down) a temperature of 550 °C is reached. Hence, FCC units operate in heat balance (Example 6.7.1), and the hot catalyst from the regenerator supplies heat for cracking, preheating, and for vaporization of the oil. 

Mixing ofhot catalyst (from r enerator) and feed (vacuum gasoil)... 

Coke formation is the main reason for catalyst deactivation in catalytic reforming but also in other refinery and petrochemical processes, for example, during catalytic cracking of vacuum gasoil or hydrodesulfurization. The regeneration is conducted in fixed beds by carefully adding small amounts of O2 in N2 at about 400-530 °C. 

In this work we have evaluated the catalytic properties of the molybdenum-phosphorus catalysts. For this purpose, we have prepared two Ni-Mo-P/AljOj samples following the impregnation sequences (Mo+P->Ni) and (P->Mo->Ni). These samples present the same chemical composition (15 wt% MoOj, 7.5 wtiK PjOj and 5.0 wt% NiO). The catalytic reaction was carried out in a high pressure fixed bed reactor using a vacuum gasoil under typical mild-hydrocracking conditions (T = 653K, P = 5 MPa, LHSV = 0.65 1/h, Hj/Hc = 600). 

Sometimes the atmospheric residue (343°C+, blend of light vacuum gasoil, heavy vacuum gasoil and vacuum residue) is also obtained and characterized. Detailed hydrocarbon analysis of crude oil off-gas is also run. 

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