[특허]Conversion of cellulosic fibers to mono-sugars and lignin

[미국특허] Conversion of cellulosic fibers to mono-sugars and lignin 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C07G-001/00 C07H-001/00 C13K-001/02
출원번호	US-0374949 (1982-05-05)
발명자 / 주소	LeGrand Ferdinand (Gainesville FL) Block Seymour S. (Gainesville FL)
출원인 / 주소	University of Florida (Gainesville FL 02)
인용정보	피인용 횟수 : 20 인용 특허 : 2

초록 ▼

A process which comprises a stepwise treatment of natural fibers with liquid or gaseous sulphur trioxide to cause decrystallization of the alpha-cellulose therein, followed by hydrolysis of the treated fibers to produce (1) an aqueous solution of hexose sugars which can be utilized as feedstock when using a yeast organism to produce ethanol, (2) pentose sugars that may be used as a syrup for feed to ruminants, and (3) a residual lignin fraction that may be used as fuel to energize said process.

대표청구항 ▼

A process for converting crystalline alpha-cellulose to amorphous alpha-cellulose which comprises the sequential steps of: a. subjecting fiber particles containing crystalline alpha-cellulose and 20-30% moisture to a mixture of air and liquid or gaseous SO3 at a temperature of not greater than about 80°C., the amount of SO3 being 10-50% of the total amount of SO3 needed to completely decrystallize said alpha-cellulose; b. simultaneously drying the treated fiber particles in said mixture of air and SO3; c. subjecting said dried fiber particles to the remaining 50-90% of liquid or gaseous SO3 in air at ambient temperature to produce a final concentration of at least 75% of H2SO4 formed in situ on said fiber particles; d. subjecting the resulting mixture of concentrated H2SO4 and fiber particles to abrasion under pressure of at least 175 psi for a reaction time of 4-8 minutes at a temperature of 80°-150°C. to dissolve crystalline alpha-cellulose; and e. recovering fibers containing acidified amorphous alpha-cellulose, hemicellulose, and lignin, and being substantially free of crystalline alpha-cellulose. A process for converting cellulose to glucose and xylose comprising: a. reducing the particle size of fibers containing alpha-cellulose to about 10 mesh; b. subjecting said fiber particles at a moisture content of 20-30% to a mixture of air and liquid or gaseous SO3 at a temperature of not greater than 80°C., the amount of SO3 being 10-50% of that needed to completely decrystallize the alpha-cellulose in said particles; c. drying the treated particles in the mixture of air and SO3; d. subjecting the dried particles to the remaining 50-90% of liquid or gaseous SO3 in air at a temperature of 20°-30°C.; e. abrading the resulting treated particles under a pressure of at least 175 psi for a time of 4-8 minutes at a temperature of 80°-150°C. to dissolve crystalline alpha-cellulose in the concentrated H2SO4 formed in situ from said SO3 and said moisture, and thereby to convert said crystalline alpha-cellulose to amorphous alpha-cellulose. f. feeding the abraded particles containing amorphous alpha-cellulose into the first of a plurality of treatment zones as a solids stream and feeding hot water and steam into the last of said treatment zones, as a liquid stream, and passing said solids stream and said liquid stream in countercurrent flow with respect to each other through said treatment zones at a temperature of 110°-127°C. and at a liquid-to-solids ratio of at least 7 to 1; g. separating said particles from said aqueous solution emanating from each said treatment zone and passing the separated portions, respectively, in opposite directions to the next treatment zone; and h. recovering from said first treatment zone an aqueous solution containing glucose and xylose, and recovering from said last treatment zone particles containing lignin and being substantially free of cellulose and mono-sugars.

이 특허에 인용된 특허 (2) 인용/피인용 타임라인 분석

Sachetto Jean-Pierre (St-Julien en Genevois FRX) Michel Jean-Pierre (Ferney-Voltaire FRX) Cuccolo Sergio (Geneva CHX) Regnault Alain (Ferney-Voltaire FRX), Depolymerized cellulosic material with low crystallinity obtained from cellulosic fibers and process for its manufacture.
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Buckl Hans (Freising-Tumtenhausen DE1) Fahn Rudolf (Gammelsdorf DE1), Process for the two-stage composition of the hemicelluloses of xylane-containing natural products for the purpose of obt.
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이 특허를 인용한 특허 (20) 인용/피인용 타임라인 분석

Seymour,Gary F., Commercial production of synthetic fuel from fermentation by-products system.
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Wu, Yong K.; Crandall, Michael D.; Dams, Rudolf J.; Hewitt, Michelle M.; Kadoma, Ignatius A.; Papp, Siegmund; Jennen, Jay M.; Myers, Sasha B., Controlled degradation fibers.
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Timonen Maritta (Kantelettarentie 8E 57 Helsinki MA FIX) Rha ChoKyun (285 Commonwealth Ave. Boston MA 02114) Vaara Timo (It. Puistot 16 L 14 Helsinki FIX) Bagley Lindsey (4 ; Barn Close Maidenhead ; , Foodstuffs containing novel degraded cellulose derivatives.
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Christensen, Borge Holm; Gerlach, Lena Holm, Method and apparatus for conversion of cellulosic material to ethanol.
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Christensen, Borge Holm; Gerlach, Lena Holm, Method and apparatus for conversion of cellulosic material to ethanol.
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Christensen, Borge Holm; Gerlach, Lena Holm, Method and apparatus for conversion of cellulosic material to ethanol.
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Christensen, Borge Holm; Gerlach, Lena Holm, Method and apparatus for conversion of cellulosic material to ethanol.
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Uusitalo, Päivi; Tikka, Panu, Method for recovering hydrolysis products.
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Farone William A. (Irvine CA) Cuzens John E. (Santa Ana CA), Method of fermenting sugars resulting from strong acid hydrolysis.
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Klyosov Anatole A. ; Philippidis George P. ; James Alan M. ; Monovoukas Yiannis A., Method of producing glucose from papermaking sludge using concentrated or dilute acid hydrolysis.
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DeLong Edward A. (439-22560 Wye Rd. Sherwood Park ; Alberta T8A 4T6 CAX), Method of producing level off DP microcrystallinecellulose and glucose from lignocellulosic material.
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Farone William A. ; Cuzens John E., Method of producing sugars using strong acid hydrolysis.
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Farone William A. ; Cuzens John E., Method of removing silica or silicates from solids resulting from the strong acid hydrolysis of cellulosic and hemicell.
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Dilling Peter (Isle of Palms SC), Oleum sulfonation of lignins.
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Dilling Peter (Isle of Palms SC), Oleum sulfonation of lignins.
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Bakker,Robert Reurd C.; Hazewinkel,Jacob Hendrik O.; Van Groenestijn,Johannes Wouterus, Process and apparatus for the conversion of biomass.
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Olson, David A., Reactor pump for catalyzed hydrolytic splitting of cellulose.
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Olson, David A., Reactor pump for catalyzed hydrolytic splitting of cellulose.
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Farone William A. (Irvine CA) Cuzens John E. (Santa Ana CA), Strong acid hydrolysis of cellulosic and hemicellulosic materials.
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Dilling Peter (Isle of Palms SC), Sulfonation of lignins.
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IPC	Description
A	생활필수품
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Conversion of cellulosic fibers to mono-sugars and lignin 원문보기