[특허]Method for producing ethanol and co-products from cellulosic biomass

Method for producing ethanol and co-products from cellulosic biomass 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D21C-001/10 F23C-013/02 F23D-014/64 F23D-014/66 F23N-001/02
출원번호	US-0056074 (2010-08-24)
등록번호	US-9335043 (2016-05-10)
국제출원번호	PCT/US2010/046561 (2010-08-24)
§371/§102 date	20110126 (20110126)
국제공개번호	WO2011/028554 (2011-03-10)
발명자 / 주소	Nguyen, Quang A.
출원인 / 주소	Abengoa Bioenergy New Technologies, Inc.
대리인 / 주소	Armstrong Teasdale LLP
인용정보	피인용 횟수 : 0 인용 특허 : 123

초록 ▼

The present invention generally relates to processes for production of ethanol from cellulosic biomass. The present invention also relates to production of various co-products of preparation of ethanol from cellulosic biomass. The present invention further relates to improvements in one or more aspects of preparation of ethanol from cellulosic biomass including, for example, improved methods for cleaning biomass feedstocks, improved acid impregnation, and improved steam treatment, or “steam explosion.”

대표청구항 ▼

1. A method for pretreatment of virgin cellulosic biomass feedstock comprising cellulose, hemicellulose, lignin, and sand, the method comprising: dry cleaning the virgin cellulosic biomass feedstock in a fine particulate separation zone comprising at least one classifying screen having openings of from U.S. Sieve No. 20 (840 μm) to U.S. Sieve No. 100 (150 μm) to recover a cleaned biomass feedstock on the at least one classifying screen and remove a fine particulate fraction therefrom, the fine particulate fraction having passed through the classifying screen wherein the fine particulate fraction has an ash content of at least about 30 wt. %, wherein said dry cleaning is done in the absence of the addition of liquid to the virgin cellulosic biomass feedstock for the purpose of removing contaminants;contacting in an acid impregnation vessel the cleaned biomass feedstock and an acidic aqueous liquid medium containing less than 5 wt % acid to form an acid-impregnated cellulosic biomass feedstock;removing an aqueous liquid fraction from the acid-impregnated cellulosic biomass feedstock to form an acid-impregnated feedstock having a reduced sand content and an acidic aqueous liquid fraction comprising sand;removing a sand-rich product from the acidic aqueous liquid fraction; andintroducing at least a portion of the acidic aqueous liquid fraction having the sand-rich product removed therefrom into the acid impregnation vessel. 2. The method of claim 1 wherein the cleaned biomass feedstock and the acidic aqueous liquid medium are contacted by soaking the cleaned biomass feedstock in the acidic liquid medium. 3. The method of claim 1 wherein the acidic aqueous liquid fraction having the sand rich product removed therefrom and the acidic aqueous liquid medium are combined prior to introduction into the acid-impregnation vessel. 4. The method of claim 1 wherein the cellulosic biomass feedstock comprises particles having a particle size distribution such that at least 50 wt % of the feedstock particles have a size in their largest dimension of from about 0.6 cm (0.25 inches) to about 4 cm (1.5 inches). 5. The method of claim 1 wherein the acidic aqueous liquid medium includes the acid at a concentration of from about 0.7 wt % to about 3.5 wt %. 6. The method of claim 1 wherein the acidic aqueous liquid medium includes the acid at a concentration of from about 1.0 wt % to about 3.0 wt %. 7. The method of claim 1 wherein the cleaned biomass feedstock is contacted with at least 0.005 kg acid (acid weight basis) per kg cellulosic biomass feedstock (dry weight basis). 8. The method of claim 1 wherein the cleaned biomass feedstock is contacted with from about 0.01 kg to about 0.05 kg acid (acid weight basis) per kg cellulosic biomass feedstock (dry weight basis). 9. The method of claim 1 wherein the acidic aqueous liquid medium comprises a surfactant (wetting agent). 10. The method of claim 1 wherein the temperature of the acidic aqueous liquid medium is from about 20° C. to about 95° C. 11. The method of claim 1 further comprising heating during contact of the cleaned biomass feedstock with the acidic aqueous liquid medium. 12. The method of claim 1 wherein the cleaned biomass feedstock and acidic aqueous liquid medium are contacted at a temperature of from about 30° C. to about 90° C. 13. The method of claim 1 wherein the acid-impregnated cellulosic biomass feedstock has a moisture content of from about 20 wt % to about 70 wt %. 14. The method of claim 1 wherein the acid-impregnated cellulosic biomass feedstock has a moisture content of from about 30 wt % to about 70 wt %. 15. The method of claim 1 wherein the temperature of the acid impregnated cellulosic biomass feedstock is from about 40° C. to about 80° C. 16. The method of claim 1 wherein the cleaned biomass feedstock is contacted with the acidic aqueous liquid medium in the acid impregnation vessel and the acid-impregnated cellulosic biomass feedstock is removed from the acid impregnation vessel and held in a second vessel, the residence time of the acid-impregnated cellulosic biomass feedstock in the second vessel being from about 1 to about 60 minutes. 17. The method of claim 1 wherein the cleaned biomass feedstock is contacted with the acidic aqueous liquid medium by spraying the acidic liquid medium onto the cellulosic biomass feedstock. 18. The method of claim 17 wherein the cleaned biomass feedstock is contacted with the acidic aqueous liquid medium in an acid impregnation vessel comprising counter-rotating shafts having flights mounted thereon for agitation of the biomass. 19. The method of claim 18 wherein the cleaned biomass feedstock is agitated for from about 2 to about 5 minutes. 20. The method of claim 18 wherein the cleaned biomass feedstock is agitated at an intensity of from about 2 kWh/ton biomass to about 10 kWh/ton biomass. 21. The method of claim 18 wherein the cleaned biomass feedstock is contacted with the acidic aqueous liquid medium in the acid impregnation vessel for from about 2 to about 35 minutes. 22. The method of claim 1 wherein the fine particulate fraction has a moisture content of less than 20 wt. %. 23. The method of claim 1 wherein the cleaned biomass feedstock has a moisture content of less than 20 wt. %. 24. The method of claim 1 wherein the moisture content of the cleaned biomass feedstock and of the virgin cellulosic biomass feedstock vary by no more than about 10 wt. %. 25. The method of claim 1 wherein the moisture content of the cleaned biomass feedstock and of the virgin cellulosic biomass feedstock vary by no more than about 5 wt. %. 26. The method of claim 1 wherein the moisture content of the cleaned biomass feedstock and of the virgin cellulosic biomass feedstock vary by no more than about 3 wt. %.

이 특허에 인용된 특허 (123)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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Method for producing ethanol and co-products from cellulosic biomass 원문보기

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