公开(公告)号：EP1371622A3

公开(公告)日：2004-01-21

申请号：EP03076806.3

申请日：2003-06-06

申请人： FINA TECHNOLOGY, INC.

发明人： Xiao, Xin ,  Butler, James R.

IPC分类号： C07C6/12

CPC分类号： C07C6/123 ,  C07C6/126 ,  C07C2529/24

摘要： A process for the transalkylation of an aromatic feedstock containing a benzene component and a polyalkylated aromatic component comprising at least one polyalkyl aromatic compound of at least nine carbon atoms. The feedstock is supplied to a reaction zone containing a metal modified zeolite transalkylation catalyst. In one alternative, the process comprises (a) providing a catalytic reaction zone containing a metal modified zeolite transalkylation catalyst; (b) supplying a toluene-containing feedstock to said reaction zone while operating said reaction zone under conditions effective for the disproportionation of toluene; (c) recovering a disproportionation product containing benzene and xylene from said reaction zone; (d) terminating the supply of said toluene-containing feedstock to said reaction zone; (e) thereafter supplying to said reaction zone containing said metal-modified zeolite catalyst a transalkylation feedstock containing a benzene component and a polyalkylated aromatic component comprising at least one polyalkyl aromatic compound having at least nine carbon atoms; (f) operating said reaction zone under conditions effective for the transalkylation of said feedstock to produce a transalkylated product having a reduced polyalkyl benzene content and an enhanced monoalkyl benzene content relative to said transalkylation feedstock; and (g) recovering said transalkylated product from said reaction zone. In another alternative, the reaction zone is operated under conditions providing an equivalent conversion of pure toluene in the presence of the catalyst within the range of 40-55%, resulting in a transalkylated product with a reduced polyalkyl benzene content and an enhance monoalkyl benzene content relative to the transalkylation feedstock. In continued operation of the transalkylation reaction zone, at least one of the reaction conditions of temperature, pressure, and space velocity is adjusted in order to maintain a constant reaction severity to provide a desired equivalent conversion of toluene within a tolerance range of ± 2%. Specifically, the temperature is progressively increased while continuing the operation of the transalkylation zone to maintain a condition of constant reaction severity.

公开(公告)号：EP1260493A1

公开(公告)日：2002-11-27

申请号：EP02076656.4

申请日：2002-04-24

申请人： FINA TECHNOLOGY, INC.

发明人： Xiao, Xin ,  Butler, James R.

IPC分类号： C07C6/12 ,  C07C15/04 ,  C07C15/06 ,  C07C15/08

CPC分类号： C07C6/123 ,  C07C6/12 ,  C07C2529/18

摘要： A method is provided for conversion of heavy alkylaromatic compounds, particularly those in the C 8 - C 12 range, into more valuable aromatics of benzene, toluene and xylene utilizing a toluene disproportionation unit containing a nickel, palladium or platinum-modified mordenite catalyst. The method allows large amounts of these heavy alkylaromatic compounds to be processed without adversely affecting catalyst activity or catalyst life. This is accomplished by introducing the heavy alkylaromatic compounds into the reactor at constant reaction severity conditions and maintaining those conditions during conversion.

摘要翻译： 提供了一种使用含有镍，钯或铂改性的丝光沸石催化剂的甲苯歧化单元将重质烷基芳族化合物，特别是C8-C12范围内的重质烷基芳族化合物转化为更有价值的苯，甲苯和二甲苯芳烃的方法。 该方法允许大量这些重质烷基芳族化合物被加工而不会不利地影响催化剂活性或催化剂寿命。 这是通过将重质烷基芳族化合物以恒定的反应苛刻度条件引入反应器并在转化期间维持这些条件来实现的。

公开(公告)号：EP1371622A2

公开(公告)日：2003-12-17

申请号：EP03076806.3

申请日：2003-06-06

申请人： FINA TECHNOLOGY, INC.

发明人： Xiao, Xin ,  Butler, James R.

IPC分类号： C07C6/12

CPC分类号： C07C6/123 ,  C07C6/126 ,  C07C2529/24

摘要： A process for the transalkylation of an aromatic feedstock containing a benzene component and a polyalkylated aromatic component comprising at least one polyalkyl aromatic compound of at least nine carbon atoms. The feedstock is supplied to a reaction zone containing a metal modified zeolite transalkylation catalyst. In one alternative, the process comprises

(a) providing a catalytic reaction zone containing a metal modified zeolite transalkylation catalyst;
(b) supplying a toluene-containing feedstock to said reaction zone while operating said reaction zone under conditions effective for the disproportionation of toluene;
(c) recovering a disproportionation product containing benzene and xylene from said reaction zone;
(d) terminating the supply of said toluene-containing feedstock to said reaction zone;
(e) thereafter supplying to said reaction zone containing said metal-modified zeolite catalyst a transalkylation feedstock containing a benzene component and a polyalkylated aromatic component comprising at least one polyalkyl aromatic compound having at least nine carbon atoms;
(f) operating said reaction zone under conditions effective for the transalkylation of said feedstock to produce a transalkylated product having a reduced polyalkyl benzene content and an enhanced monoalkyl benzene content relative to said transalkylation feedstock; and
(g) recovering said transalkylated product from said reaction zone.
In another alternative, the reaction zone is operated under conditions providing an equivalent conversion of pure toluene in the presence of the catalyst within the range of 40-55%, resulting in a transalkylated product with a reduced polyalkyl benzene content and an enhance monoalkyl benzene content relative to the transalkylation feedstock. In continued operation of the transalkylation reaction zone, at least one of the reaction conditions of temperature, pressure, and space velocity is adjusted in order to maintain a constant reaction severity to provide a desired equivalent conversion of toluene within a tolerance range of ± 2%. Specifically, the temperature is progressively increased while continuing the operation of the transalkylation zone to maintain a condition of constant reaction severity.

摘要翻译： 包含苯组分和多烷基化芳族组分的芳族原料烷基转移的方法，其包含至少一种具有至少9个碳原子的多烷基芳族化合物。 将原料供给到含有金属改性沸石烷基转移催化剂的反应区。 在一个替代方案中，该方法包括（a）提供含有金属改性沸石烷基转移催化剂的催化反应区; （b）在对甲苯歧化有效的条件下操作所述反应区，向所述反应区供应含甲苯的原料; （c）从所述反应区回收含有苯和二甲苯的歧化产物; （d）终止向所述反应区供应所述含甲苯的原料; （e）此后向包含所述金属改性沸石催化剂的所述反应区供给包含苯组分和包含至少一个具有至少9个碳原子的多烷基芳族化合物的多烷基化芳族组分的烷基转移原料; （f）在有效用于所述原料的烷基转移的条件下操作所述反应区以产生相对于所述烷基转移原料具有降低的多烷基苯含量和增强的单烷基苯含量的烷基转移产物; 和（g）从所述反应区回收所述烷基转移的产物。 在另一个替代方案中，反应区在催化剂存在下在40-55％范围内提供纯甲苯的等效转化的条件下进行操作，得到具有降低的多烷基苯含量和增强的单烷基苯含量的烷基转移产物 相对于烷基转移原料。 在烷基转移反应区的继续操作中，调节温度，压力和空间速度的至少一个反应条件以保持恒定的反应严重性，以提供所需的甲苯等效转化率在+/- 2％。 具体地，温度逐渐增加，同时继续进行烷基转移区的操作以保持反应严重性恒定的条件。