Deep catalytic cracking

An improved FCC unit is the deep catalytic cracking unit (DCC) that is designed to produce gasoline from vacuum gas oil (VGO). The... 

Item Deep Catalytic Cracking (DCC) Fluidized Catalytic Cracking (FCC) Steam Cracking (SC)... 

Deep catalytic cracking (DCC) is a catalytic cracking process which selectively cracks a wide variety of feedstocks into light olefins. The reactor and the regenerator systems are similar to FCC. However, innovation in the catalyst development, severity, and process variable selection enables DCC to produce more olefins than FCC. In this mode of operation, propylene plus ethylene yields could reach over 25%. In addition, a high yield of amylenes (C5 olefins) is possible. Figure 3-7 shows the DCC process and Table 3-10 compares olefins produced from DCC and FCC processes. ... 

DCC [Deep catalytic cracking] A general term for processes which convert heavy petroleum feedstocks and residues to hght hydrocarbons. One such process, for making C3-C5 olefins, was developed by the Research Institute of Petroleum Processing, China, and licensed through Stone Webster. Five units were operating in China in 1997. 

Deep catalytic cracking (DCC) is a commercially proven FCC process for selectively cracking a wide variety of feedstocks to light olefins, particularly propylene. Innovations in catalyst development, operational severity, and anticoking conditions. 

Chapin, L., Letzsch, W., and Swaty, T. Petrochemical Options from Deep Catalytic Cracking and FCCU. 1998 NPRA Annual Meeting, AM-98-44. 

Deep Catalytic Cracking. This process is a variation of fluid catalytic cracking. It uses heavy petroleum fractions, such as heavy vacuum gas oil, to produce propylene- and butylene-rich gaseous products and an aromatic-rich liquid product. The liquid product contains predominandy benzene, toluene, and xylene (see BTX processing). This process is being developed by SINOPEC in China (42,73). SINOPEC is currendy converting one of its fluid catalytic units into a demonstration unit with a capacity of 60,000 t/yr of vacuum gas oil feedstock. 

Figure 4-11. Deep catalytic cracking process flow diagram. (Courtesy of Stone Webster Engineering Corporation, 1977 Stone Webster Engineering Corporation.)...

Application To selectively convert vacuum gas oils and the resulting blends of each into C2-C5 olefins, aromatic-rich, high-octane gasoline and distillate using deep catalytic cracking (DCC) methods. 

Reference Chapin, Letzsch and Swaty, Petrochemical options from deep catalytic cracking and the FCCU, 1998 NPRA, AM-98 4. 

Stone Webster Eng., Corp. Olefins, light Naphtha, VGO, resld Deep catalytic cracking (DCC) process to make light olefins, C2-C5 7 2000... 

In the past few years workers at Sinopec have been prominent in developing FCC operations which target propylene as a major product. The increased propylene yield is a function of catalyst developments and increasing the cracking temperature. This variation is known as Deep Catalytic Cracking (DCC) and there are two main variants. Table 10.3 illustrates typical yields that can be achieved . 

Economics ROG streams from FCC units, deep catalytic cracking (DCC) units, catalytic pyrolysis process (CPP) units and coker units are normally used as fuel gas in refineries. However, these streams contain significant amounts of olefins (ethylene and propylene), which can be economically recovered. In fact, many such streams can be recovered with project payout times of less than one year. 

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... 

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