검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | B01J-008/18 B01J-038/30 C10G-047/30 |
미국특허분류(USC) | 422/145; 422/139; 422/140; 422/141; 422/142; 422/144; 502/020; 502/041; 502/045; 208/106; 208/113 |
출원번호 | US-0614978 (2000-07-12) |
발명자 / 주소 | |
출원인 / 주소 | |
인용정보 | 피인용 횟수 : 2 인용 특허 : 7 |
In a fluid catalytic cracking (FCC) unit, a regenerator, a stripper or a withdrawal well connecting to either of the vessels, includes a standpipe for circulating catalyst from one vessel to another, the standpipe having an inlet design which reduces gas entrainment during catalyst transport by partial de-fluidization in the standpipe inlet region. The standpipe inlet design could include multiple inlet openings through the top of the standpipe or from the side wall by slots, or both, and a horizontal disk surrounding the standpipe below the slots for bl...
1. A catalytic cracking unit comprising:a regenerator;a catalyst withdrawal well spaced from said regenerator;a downwardly inclined standpipe having its upper end fluidly connected to said regenerator, and its lower end fluidly connected to said catalyst withdrawal well;a standpipe for receiving catalyst from said catalyst withdrawal well, said standpipe having an open end fluidly connected to said catalyst withdrawal well; and,an inlet portion of said standpipe extending into said catalyst withdrawal well for receiving and transporting said catalyst fro...