JP2015199956A - 高度水素化処理されたvgo型の重質原料油を処理する、芳香族コンプレックスと一体化されたfcc装置を用いる軽質オレフィンおよびbtxの製造方法 - Google Patents
高度水素化処理されたvgo型の重質原料油を処理する、芳香族コンプレックスと一体化されたfcc装置を用いる軽質オレフィンおよびbtxの製造方法 Download PDFInfo
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Abstract
Description
を供給される芳香族コンプレックス(AC)とを含み、前記方法は、以下の一連の動作を含む。
− 水素化処理されたVGO若しくは未転換油UCO原料油(2)、又は2つの原料油の任意の混合物がFCC装置へと送られ、そこで流出物(6)を生成し、流出物(6)が分留(fractionation)(FRAC)装置へと送られ、そこから軽質フラクション(8)、LCN留分(IP−160℃)、HCN留分(160℃−220℃)、及び重質のフラクション(220℃+)が抽出され、
− 軽質のフラクション(8)がコールドボックス(CBS)と呼ばれる分離ボックスに送られ、軽質オレフィン類と、エチレン及びプロピレンと、乾燥気体(H2及びCH4)と、C2、C3及びC4軽質パラフィン類との分離が可能となされ、
− LCN(IP−160℃)(9)と呼ばれるガソリン留分は、芳香族コンプレックス(AC)用の原料油(10)を形成するために、接触改質(REF)流出物(5)との混合物として芳香族コンプレックス(AC)に送られ、
− HCN留分(160℃−220℃)はそのままアップサイクルされ、
− 初期蒸留点が220℃よりも高い重質のフラクション(220℃+)は、この場合には有意なクラッキング潜在力を有しており、FCCへと再循環され、
− 水素化処理されたナフサ(4)は接触改質(REF)装置用の原料油として送られ、
− 以下のものは、芳香族コンプレックス(AC)から抽出される:BTX類、流出物の非芳香族部分として定義されるラフィネート(12)(これは少なくとも部分的にFCC原料油(2)との混合物として送られる)、及び重質芳香族化合物(11)と呼ばれるフラクション(これもまたFCC原料油(2)との混合物として送られる)。
− FCC由来のLCN(IP−160℃)と称される流出物によって構成される第1のフローであって、前記芳香族コンプレックス(AC)用の主要原料油との混合物として、芳香族コンプレックスに送られるフロー。
− 第2のフローは、芳香族コンプレックス由来の重質芳香族化合物流出物で構成され、炭素原子数が10を超える分子全てとして定義することができ、前記FCC用原料油との混合物としてFCCへと送られる。
FCC石油化学装置に入る第1の原料油(1)は、VGO水素化分解装置由来の未転換オイル又は極度に水素化処理されたVGOである。
FCC装置の運転条件
FCC装置は、高度に水素化処理されたVGOの又はVGOの水素化転換用装置に由来する未転換油の、接触分解のための装置である。本発明の文脈でのFCC装置は、上昇フロー(「ライザー))又は下降フロー(「ダウナー))のいずれかで作動する少なくとも1つの主反応器である。
実施例1 極度に水素化された重質原料油のクラッキング(本発明によらない)
この実施例は、以下の表3に示すような標準組成を有する減圧蒸留の水素化分解塔からの未転換型の原料油を処理するFCC装置の各収量及びBTXの回収を可能にする芳香族コンプレックスの各収量(FCC装置と芳香族コンプレックスとの一体化を行わない場合)を示す。
実施例1と同じ運転条件下で、実施例2は、初期蒸留点(5%)がおよそ190℃の芳香族コンプレックス(AC)流出物である重質芳香族化合物原料油(11)をFCCの反応区分に送ることによって、図1によるFCC、芳香族コンプレックス間の相乗効果を利用する。
HDT 水素化処理
FCC 接触分解
REF 接触改質
REFF 接触改質加熱炉
AC 芳香族コンプレックス
FRAC 分留
CBS コールドボックス(分離ボックス)
SPLIT 分離装置
OLG オリゴマー化
VGO 減圧気体油
UCO 未転換油
LCN 軽質分解ナフサ
HCN 重質分解ガソリン
BTX ベンゼン、トルエン、キシレン
2 FCC原料油
4 水素化処理されたナフサ原料油
5 接触改質流出物
6 FCC流出物
8 FRAC装置からの軽質フラクション
9 LCN
10 AC用原料油
11 重質芳香族化合物
12 ラフィネート
13 SPLITからの軽質フラクション
14 SPLITからの重質フラクション
16 オリゴマー装置流出物
Claims (4)
- 水素化分解から得られる水素化処理されたVGO若しくは未転換油(UCO)型の第1原料油から、又はこれら2つの原料油の任意の混合物から、及び初期蒸留点が30℃よりも高く最終蒸留点が220℃未満である第2のナフサ型原料油からの、軽質オレフィン類及びBTXの製造方法であって、前記方法は、水素化処理されたVGO原料油又は未転換油を処理する接触分解(FCC)装置と、ナフサ(30℃−220℃)と称される原料油を処理する接触改質(REF)装置と、接触改質(REF)流出物とFCC流出物のLCN(IP−160℃)と称されるフラクションとを供給される芳香族コンプレックス(AC)とを備え、前記方法は、以下の運転シーケンス:
− 前記水素化処理されたVGO原料油もしくは未転換油UCO(2)又はこれら2つの任意の混合物が、FCC装置に送られ、FCC装置は流出物(6)を生成し、流出物(6)は分留(FRAC)装置に送られ、この装置から軽質のフラクション(8)、LCN留分(IP−160℃)、HCN留分(160℃−220℃)、及び重質フラクション(220℃+)が抽出され、
− 軽質のフラクション(8)が軽質オレフィン類と、エチレン及びプロピレンと、乾燥気体(H2及びCH4)と、C2、C3及びC4の軽質パラフィンとの分離を可能にするコールドボックス(CBS)とも称される分離ボックスへ送られ、
− LCN(9)とも称されるガソリン留分(IP−160℃)が、芳香族コンプレックス(AC)用の原料油(10)を形成するために接触改質(RF)流出物(5)との混合物として芳香族コンプレックス(AC)へと送られ、
− HCN留分(160℃−220℃)はそのままアップサイクルされ、
− 初期蒸留点が220℃よりも高い重質フラクション(220℃+)は前記FCCへと再循環され、
− 水素化処理されたナフサ(4)は接触改質(REF)装置(REF)用の原料油として送られ、
− BTX、流出物の非芳香族部分として定義されるラフィネート(12)であって少なくとも部分的にFCC原料油(2)との混合物として送られるラフィネート(12)、及び重質芳香族化合物(11)と称されるフラクションであってやはりFCCの原料油(2)との混合物として送られるフラクション、は芳香族コンプレックス(AC)から抽出される、
を含み、前記FCC装置は以下の条件:
− ライザー出口温度は500℃〜650℃の範囲にある、
− C/O(触媒対原料油)比は5〜30の範囲にあり、及びFCC装置で使用される触媒はZSM−5を添加されたゼオライトである、
の下で運転される、方法。 - 請求項1に記載の軽質オレフィン類及びBTXの製造方法であって、前記芳香族コンプレックスからのラフィネート流出物(12)が、原料油(2)との混合物として接触分解(FCC)装置へ送られる軽質フラクション(13)を、水素化処理されたナフサ原料油(4)との混合物として接触改質装置(REF)へ送られる重質フラクション(14)から分離することを可能にする分離装置(SPLIT)へと送られる、方法。
- 請求項1に記載の接触分解(FCC)装置からの軽質オレフィン類及びBTXの製造方法であって、前記分離ボックス(CBS)由来の軽質のC4及びC5オレフィンがオリゴマー化(OLG)装置へと送られ、及び前記オリゴマー化装置からの流出物(16)が原料油(2)との混合物として前記接触分解(FCC)装置へと送られる、方法。
- 請求項1〜3のいずれかに記載の軽質オレフィン類及びBTXの製造方法であって、前記FCC装置のための原料油(2)が、接触分解(FCC)装置の原料油として導入される前に接触改質加熱炉(REFF)の対流帯域で予備加熱される、方法。
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