통합된 C3-C4 탄화수소 탈수소화 공정

• Main Author: PRETZ MATTHEW T
• Format: Patent
• Language: Korean
• Published: 05.12.2017
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

신규한 또는 재구성된 플랜트에서 사용하기에 적합한 통합된 공정은 적절한 C3-C4 탄화수소 공급물의 탈수소화를 통해 올레핀 또는 디-올레핀을 제조하고, (1) 550℃ 내지 760℃의 온도 및 약 41.4 내지 약 308.2 kPa(약 6.0 내지 약 44.7 psia)의 압력 및 5 내지 100의 촉매 대 공급물 비(w/w) 하에서 유동층에서 겔다트 A 또는 겔다트 B 분류를 갖는 탈수소화 촉매와 공급물을 접촉시켜 탈수소화 생성물을 형성시키는 단계; 사이클론 분리 시스템에 의해 촉매의 일부로부터 탈수소화 생성물 및 미반응된 출발 공급물 혼합물을 분리시키는 단계; 660℃ 내지 850℃에서의 연소 후에, 660℃ 이상의 산소-함유 유체와의 접촉에 의해 유동화된 재생기에서 촉매를 재활성화시키는 단계, 및 촉매를 탈수소화 반응기로 복귀시키는 단계; (2) 생성물 혼합물을 압축시켜 압축된 생성물 혼합물을 형성시키는 단계; 및 (3) 압축된 생성물 혼합물을 분획화시켜 적어도 표적 올레핀 또는 디-올레핀을 포함하는 생성물 스트림을 형성시키는 단계를 포함한다. 상기 통합된 공정은 다른 공지된 종래의 공정과 비교하여 증가된 플랜트 용량, 개선된 경제성, 및 감소된 환경 영향을 제공한다. The invention relates to an integrated process for producing C3-C4 olefins or C3-C4 di-olefins comprising the steps of:(1)(a) contacting, in a fluidized dehydrogenation reactor,(i) a C3-C4 hydrocarbon feed and(ii) a catalyst feed comprising a catalyst;under conditions such that a step (1)(a) product mixture, comprising a C3-C4 target olefin or di-olefin, hydrogen and unreacted C3-C4 hydrocarbon feed, is formed; andthe catalyst has coke deposited thereon and is at least partially deactivated such that it forms an at least partially deactivated catalyst; and(b) transferring the step (1)(a) product mixture and the at least partially deactivated catalyst from the fluidized dehydrogenation reactor to a cyclonic separation system, andunder conditions such that the step (1)(a) product mixture is converted to form a step (1)(b) product mixture; andthereafter substantially separating the step (1)(b) product mixture and the at least partially deactivated catalyst from each other;(c) transferring at least a portion of the at least partially deactivated catalyst to a regenerator vessel and heating the at least partially deactivated catalyst therein to a combustion temperature of from about 660 °C to about 850 °C in order to combust the coke deposited on the at least partially deactivated catalyst therein,the heating forming a heated, further deactivated catalyst which has an activity for dehydrogenating the C3-C4 hydrocarbon feed that is less than that of the at least partially deactivated catalyst, and,(d) subjecting the heated, further deactivated catalyst to a conditioning step, comprising maintaining the heated, further deactivated catalyst at a temperature of at least 660 °C under a flow of an oxygen-containing gas for more than 2 minutes,to form an oxygen-containing, at least partially reactivated catalyst that has an activity for dehydrogenating the C3-C4 hydrocarbon feed that is greater than that of the at least partially deactivated catalyst; and(e) transferring the at least partially reactivated catalyst back to the fluidized dehydrogenation reactor.