[특허]Method and apparatus for continuous hydrolysis of cellulosic fiber material

Method and apparatus for continuous hydrolysis of cellulosic fiber material 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D21C-001/02 D21C-001/04 D21C-003/02 D21C-003/24
출원번호	US-0500900 (1974-08-26)
우선권정보	SE-0011940 (1973-09-03)
발명자 / 주소	Richter Johan C. F. C. (St. Jean Cap Ferrat FRX)
출원인 / 주소	Kamyr Aktiebolag (Karlstad SEX 03)
인용정보	피인용 횟수 : 23 인용 특허 : 0

초록 ▼

A method and apparatus for continuously hydrolizing finely comminuted cellulosic fiber material and separately extracting the acid hydrolysate therefrom. Cellulosic material is fed into an upright elongated reaction vessel near the upper or top portion thereof and heated to hydrolysis temperature. The heated fiber material then passes downward through the reaction vessel and is concurrently treated by exposure to a short liquid phase which comprises concurrent impregnation and simultaneous concurrent hydrolysis to partially hydrolize the fiber material. The material is then exposed counter-currently to a liquid phase comprising a counter-current wash with simultaneous hydrolysis of a wash liquid which has been introduced from the bottom or lower portion of the reaction vessel, the wash liquid having been preheated to full hydrolysis temperature. The hydrolysate is then extracted and removed from the fiber material and the fiber material (free of hydrolysate) is discharged from the lower portion of the reaction vessel.

대표청구항 ▼

A method for continuously treating cellulosic fiber material containing a dry substance utilizing a first vertical vessel having an upper steam phase and lower liquid phase, and utilizing a second vertical vessel operatively connected to the first vessel said method comprising the steps of (a) feeding cellulosic fiber material into the upper steam phase of the first vessel so that the material is heated to hydrolysis temperature, (b) concurrently impregnating and hydrolizing the material as it moves downwardly in the first vessel in a concurrent liquid phase, (c) subjecting the downwardly moving material to a countercurrent wash liquid heated to hydrolysis temperature, to purge the dry substance therefrom, in a countercurrent liquid phase, (d) extracting and recovering from the first vessel hydrolysate containing the dry substance at a portion of the first vessel generally corresponding to the area between the concurrent and countercurrent liquid phases, (e) discharging the fiber material substantially free of hydrolysate from the first vessel and feeding it to a top portion of the second vessel, (f) digesting the fiber material by subjecting the downflowing fiber material in the second vessel to counter-current digesting liquor flow, (g) extracting and recovering black liquor from the second vessel and maintaining it separate and distinct from the hydrolysate extracted from the first vessel, and (h) removing digested fiber material from the bottom of the second vessel. Apparatus for the hydrolysis of fiber material containing a dry substance, comprising a first vertical vessel having an upper steam phase and lower liquid phases, a second vertical vessel, a transfer line connecting the bottom of said first vessel to the top of said second vessel, means for feeding cellulosic fiber material into the upper steam phase of said first vessel so that the material is heated to hydrolysis temperature, means located adjacent the bottom of said first vessel for introducing wash liquid heated to hydrolysis temperature into said first vessel with an upwardly directed velocity component to counter wash and hydrolize the downwardly moving fiber material and purge the dry substance therefrom, means for recovering from said first vessel the hydrolysate, containing the dry substance, at an intermediate portion of said vertical first vessel, means for discharging the fiber material, substantially free of hydrolysate, from the bottom of said first vessel into said transfer line, means for feeding the fiber material from said transfer line into said second vessel, means for subjecting the downflowing fiber material in said second vessel to a countercurrent digesting liquor flow, means for extracting and recovering black liquor from said second vessel and maintainint it separate and distinct from the hydrolysate extracted from said first vessel, and means for removing digested fiber material from the bottom of said second vessel.

이 특허를 인용한 특허 (23)

Sherman Michael I. (Glens Falls NY) Elmore Carl L. (Glens Falls NY), Acid hydrolysis of biomass for alcohol production.
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Bechard Grant E. ; Hefele John ; Laakso Larry W. ; Barrett Mark D. ; Chasse R. Fred, Distribution of dilution liquor to the discharge of a cellulose pulp digester.
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Sherman Michael I. (Glens Falls NY) Elmore Carl L. (Glens Falls NY) Brison Robert J. (Golden CO), Leaching and washing a flocculated slurry having a fiber content.
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Sherman, Michael I.; Elmore, Carl L.; Brison, Robert J., Leaching and washing a flocculated slurry having a fiber content.
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van Lee, Richard Constantine; Devanesan, Alagaratnam Joseph, Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester.
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van Lee, Richard Constantine; Devanesan, Alagaratnam Joseph, Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester.
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Sherman Michael I. (Glens Falls NY), Method of countercurrent acid hydrolysis of comminuted cellulosic fibrous material.
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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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Elmore Carl L. (Glen Falls NY), Method of producing kraft pulp using an acid prehydrolysis and pre-extraction.
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Dahl, Olli; Vanhatalo, Kari; Parviainen, Kari, Method to product microcellulose.
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Amidon, Thomas E.; Francis, Raymond; Scott, Gary M.; Bartholomew, Jeremy; Ramarao, Bandaru V.; Wood, Christopher D., Methods of producing a paper product.
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Amidon, Thomas E.; Francis, Raymond; Scott, Gary M.; Bartholomew, Jeremy; Ramarao, Bandaru V.; Wood, Christopher D., Methods of producing a paper product.
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Tan, Zheng; Goyal, Gopal; Koukoulas, Alexander A., Modified Kraft fibers.
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Tan, Zheng; Goyal, Gopal; Koukoulas, Alexander A, Modified kraft fibers.
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Yasnovsky, V. M.; MacDonald, Donald M., Prevention of hornification of dissolving pulp.
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Amidon, Thomas E.; Francis, Raymond; Scott, Gary M.; Bartholomew, Jeremy; Ramarao, Bandaru V.; Wood, Christopher D., Product and processes from an integrated forest biorefinery.
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Amidon, Thomas E.; Francis, Raymond; Scott, Gary M.; Bartholomew, Jeremy; Ramarao, Bandaru V.; Wood, Christopher D., Product and processes from an integrated forest biorefinery.
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Amidon, Thomas E.; Francis, Raymond; Scott, Gary M.; Bartholomew, Jeremy; Ramarao, Bandaru V.; Wood, Christopher D., Product and processes from an integrated forest biorefinery.
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Amidon, Thomas E.; Francis, Raymond; Scott, Gary M.; Bartholomew, Jeremy; Ramarao, Bandaru V.; Wood, Christopher D., Product and processes from an integrated forest biorefinery.
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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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Brison Robert J. (Golden CO) Elmore Carl L. (Glens Falls NY) Mitchell Phillip (Glens Falls NY), Utilization of oxygen in leaching and/or recovery procedures employing carbon.
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Marcoccia Bruno S. ; Prough J. Robert ; Johanson Jerry R. ; Stromberg C. Bertil ; Phillips Joseph R., Vertical pulping digester having substantially constant diameter.
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Method and apparatus for continuous hydrolysis of cellulosic fiber material 원문보기

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