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Comprehensive Utilization Techniques of FCC Slurry

CAO Zu-bin, SHI Jun-feng, LIU Jing-jie,JIANG Zhao-kun

Abstract （424）

PDF （215KB）（356）

Daqing Petrochemical Plant FCC slurry as raw material, furfural as a separation of solvent, this method can effectively separate the cracking part and the faction containing mass aromatics in slurry. It was studied the influence of extraction temperature, catalyst to oil ratio and residence time in refined effects. The results show that FCC slurry is separated well in the extraction temperature of 60 ℃, catalyst to oil ratio of 2∶1, at 30 min retention time. The content of saturated hydrocarbons in refined oil up to 80%, has the good FCC performance. The extracting oil can be used as the blending component of the aromatic rubber filling oil.

2010, 30 (3): 6-9. DOI: 10.3696/j.issn.1672-6952.2010.03.002

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Criteria of Generalized α-Doubly Diagonally Dominant Matrices

LIU Jing， CUI Qi， SONG Dai-cai

Abstract （328）

PDF （165KB）（255）

Let [WTHX]A[WTBX]=(aij)∈Cn×n, [WTBZ]if there exists[WTBX] α[WTBZ]∈（0，1）, which can make[WTBX] |aiiajj|≥（RiRj）α（SiSj）1-α[WTBZ] be right for[WTBX] i≠j（i，j∈N={1，2，…，n}）, [WTBZ]then [WTHX]A[WTBZ] is called an α-doubly diagonally dominant matrix. First it is extended the concept to generalized α-doubly diagonally dominant matrix, and obtained a new necessary and sufficient condition for [WTHX]A[WTBZ] to be generalized α-doubly diagonally dominant matrices, improving and generalizing the related results. This result enriches and improves the theory of α-doubly diagonally dominant matrices.

2007, 27 (3): 82-85.