MULTISTAGE REACTION SYSTEM WITH INTER-STAGE SPAGER SYSTEMS

• Main Authors: BUTLER JAMES R, MIGNON DENIS
• Format: Patent
• Language: English; Korean
• Published: 03.06.2002
• Edition: 7
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

PURPOSE: A multi-stage hydrocarbon treatment process with interstate injection of a quenching fluid, more particularly a vapor phase alkylation of an aromatic substrate with an alkylating agent with interstage injection of a quenching fluid comprising at least one of the aromatic alkylating agent and the aromatic substrate is provided. CONSTITUTION: The process for the alkylation of an aromatic substrate comprises (a) providing a multistage alkylation reaction zone having a plurality of series-connected catalyst beds each containing a molecular sieve aromatic alkylation catalyst, the catalyst beds being spaced from one another to provide intermediate mixing zones between adjacent-spaced catalyst beds; (b) supplying a feedstock containing an aromatic substrate and a C2-C4 alkylating agent to an inlet side of the reaction zone; (c) operating the reaction zone at temperature and pressure conditions in which the aromatic substrate is in the gaseous phase to cause gas phase alkylation of the aromatic substrate as the aromatic substrate and the alkylating progressively traverse the catalyst beds; (d) in at least one intermediate mixing zone between adjacent catalyst beds, supplying a quench fluid comprising at least one of the aromatic substrate and the alkylating agent into the interior of the mixing zone through a plurality of flow paths in which one portion of the flow paths is directed upwardly within the mixing zone and another portion of the flow pats is directed downwardly within the mixing zone, wherein the quench fluid is supplied to the mixing zone through a plurality of dispersion channels extend transversely within the mixing zone and spaced laterally from one another wherein at least some of the dispersion channels sense the quench fluid through the flow paths directed upwardly and downwardly within the mixing zone; and (e) recovering alkylated product from a downstream outlet of the reaction zone. 복수의 직렬연결된 촉매상을 가지는 다단계 알킬화 반응 구역에서 방향족 기재의 증기상 알킬화를 위한 공정과 시스템이 각각 일정간격으로 이격된 인접한 촉매상사이에 혼합 구역을 제공한다. 방향족 기재와 C2 - C4 알킬화제를 함유하는 공급원료가 반응 구역의 입구쪽에 공급된다. 반응 구역은 방향족 기재가 기상으로 존재하는 조건에서 작동되며, 그리고 방향족 기재와 알킬화제가 반응 구역을 흐르고 하나의 촉매상에서 다음으로 통과함에 따라 방향족 기재의 증기상 알킬화를 일으킨다. 방향족 기재와 알킬화제의 하나 또는 양자를 포함하는 퀀치 유체는 흐름로의 일부분이 혼합구역의 위쪽으로 유도되고 다른 부분이 혼합구역의 아래쪽으로 유도되는 복수의 흐름로를 통하여 혼합구역의 내부로 공급된다. 알킬화된 생성물은 그 후 반응구역의 하류 쪽으로부터 회수된다. 퀀치 유체는 각각이 횡으로 이격되고, 혼합 챔버를 지나 횡으로 뻗은 복수의 분산채널을 통해서 혼합구역에 공급된다. 적어도 분산 채널 중 일부는 퀀치 유체를 혼합구역 내에서 상향 및 하향으로 교대로 분배한다.