GB1043460A - Improvements in continuous aqueous prehydrolysis of wood chips - Google Patents

Improvements in continuous aqueous prehydrolysis of wood chips

Info

Publication number
GB1043460A
GB1043460A GB5100364A GB5100364A GB1043460A GB 1043460 A GB1043460 A GB 1043460A GB 5100364 A GB5100364 A GB 5100364A GB 5100364 A GB5100364 A GB 5100364A GB 1043460 A GB1043460 A GB 1043460A
Authority
GB
United Kingdom
Prior art keywords
vessel
water
chips
pipe
feeder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5100364A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rayonier Inc
Original Assignee
Rayonier Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US38833164A priority Critical
Application filed by Rayonier Inc filed Critical Rayonier Inc
Publication of GB1043460A publication Critical patent/GB1043460A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C1/00Pretreatment of the finely-divided materials before digesting
    • D21C1/02Pretreatment of the finely-divided materials before digesting with water or steam

Abstract

1,043,460. Treating wood-pulp. RAYONIER Inc. Dec. 15, 1964 [Aug. 7, 1964 No. 51003/64. Heading D2W. [Also in Division B1] Wood chips are prehydrolysed by effecting an initial mild hydrolysis in steam or water, passing the prehydrolysed chips and hot water concurrently downwards in contact in a vessel, separating part of the water and dissolved substances, cooling the chips by passing them countercurrently to a stream of water to a temperature slightly above the boiling point of water, and discharging them at atmospheric pressure. As shown, wood chips from hopper 1 are fed into vessel 4, which has steam-supply means 7 and 9 and a screw feeder 5 to force the chips to pocket-feeder 6. Some terpenes &c. are volatilized and removed at 8. The chips fall from pocket-feeder 6 to highpressure feeder 12 and are forced by pump 15 in a slurry to screw-feeder 16. The screw 17 squeezes out some water, which is returned through pipe 18. The chips are then forced along pipe 24 and into vessel 27 by water from pump 25. They move downwards through this vessel to the outlet 34. The vessel has four screen sections 36, 37, 38 and 39. At 36 and 37 the chips are charged with hot water from pipes 40 and 43. Water is drawn from the outside of the screen sections 36 and 37 and recirculated through heat-exchangers 60 and 71 by the pumps 41 and 44. The prehydrolysis take place between screens 37 and 38. At 38 a substantial part of the liquor is removed by pump 46. Pipes 50 and 51 introduce cooling water, and pipe 54 introduces dilute liquor containing dissolved chemicals. These pass upwards and are removed at 39 by pump 55 and taken to the dome 30 at the top of vessel 27. The slurry of chips leaving vessel 27 is led through pipe 35 and enlarged chamber 91 to blow-tank 92 and dewatering screen conveyer 95. Part of the water removed at 38 is recirculated through pipe 74. The rest is sent to flash chamber 77, and the concentrated liquor remaining after flashing-off is collected in tank 81 and taken off to a recovery system (not shown). The level of liquid in the flash chamber 77 is controlled by means of float indicator 78 which operates electric impulse valve 80. The condensate from heat exchangers 60 and 71 is passed to another flash chamber 63, with similar means for controlling liquid level. The recovered steam is sent to vessel 4 for use in the presteaming step. The liquid from separator 63 passes to vessel 66, with a similar level control, where more steam is flashed off together with turpentine and other volatile materials which are taken off through pipe 85 to recovery (not shown). The liquid from vessel 66 is passed through pipe 88 to waste or 89 to a powerhouse (not shown).
GB5100364A 1964-08-07 1964-12-15 Improvements in continuous aqueous prehydrolysis of wood chips Expired GB1043460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US38833164A true 1964-08-07 1964-08-07

Publications (1)

Publication Number Publication Date
GB1043460A true GB1043460A (en) 1966-09-21

Family

ID=23533684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5100364A Expired GB1043460A (en) 1964-08-07 1964-12-15 Improvements in continuous aqueous prehydrolysis of wood chips

Country Status (6)

Country Link
DE (1) DE1285285B (en)
ES (1) ES308163A1 (en)
FI (1) FI44188B (en)
FR (1) FR1420123A (en)
GB (1) GB1043460A (en)
NO (1) NO119058B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011006244A1 (en) * 2009-07-17 2011-01-20 Sunopta Bioprocess Inc. Method and apparatus for the heat treatment of a cellulosic feedstock upstream of hydrolysis
US8449680B2 (en) 2008-07-24 2013-05-28 Mascoma Canada Inc. Method and apparatus for treating a cellulosic feedstock
CN103451987A (en) * 2013-08-23 2013-12-18 湖南骏泰浆纸有限责任公司 Method and device for extracting pre-hydrolysis liquid from dissolving pulp
US8778084B2 (en) 2008-07-24 2014-07-15 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for treating a cellulosic feedstock
US8900370B2 (en) 2008-07-24 2014-12-02 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US8911557B2 (en) 2008-07-24 2014-12-16 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US8915644B2 (en) 2008-07-24 2014-12-23 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US9004742B2 (en) 2009-01-23 2015-04-14 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US9010522B2 (en) 2008-07-24 2015-04-21 Abengoa Bioenergy New Technologies, Llc Method and apparatus for conveying a cellulosic feedstock
US9033133B2 (en) 2009-01-23 2015-05-19 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US9127325B2 (en) 2008-07-24 2015-09-08 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for treating a cellulosic feedstock
WO2020153891A1 (en) * 2019-01-22 2020-07-30 Valmet Ab Process and system for treating vapours released from lignocellulose biomass during acid treatment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1096374A (en) * 1977-07-11 1981-02-24 Edward A. Delong Method of rendering lignin separable from cellulose and hemicellulose in lignocellulosic material and the product so produced
NZ191061A (en) * 1978-07-27 1982-03-16 Obbola Linerboard Ab Chemical pulp manufacture cellulosic material preheated by steam in a storage container
EP0608949B1 (en) * 1993-01-25 1998-05-06 Ceres B.V. Process for the preparation of moisture resistant vegetable fibres

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583994A (en) * 1946-06-21 1952-01-29 Rayonier Inc Wood pulp digestion
GB945957A (en) * 1960-02-08 1964-01-08 Ass Pulp & Paper Mills Continuous pulping process

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8915644B2 (en) 2008-07-24 2014-12-23 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US8900370B2 (en) 2008-07-24 2014-12-02 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US9010522B2 (en) 2008-07-24 2015-04-21 Abengoa Bioenergy New Technologies, Llc Method and apparatus for conveying a cellulosic feedstock
US8449680B2 (en) 2008-07-24 2013-05-28 Mascoma Canada Inc. Method and apparatus for treating a cellulosic feedstock
US9127325B2 (en) 2008-07-24 2015-09-08 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for treating a cellulosic feedstock
US8778084B2 (en) 2008-07-24 2014-07-15 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for treating a cellulosic feedstock
US8911557B2 (en) 2008-07-24 2014-12-16 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US9004742B2 (en) 2009-01-23 2015-04-14 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
US9033133B2 (en) 2009-01-23 2015-05-19 Abengoa Bioenergy New Technologies, Llc. Method and apparatus for conveying a cellulosic feedstock
WO2011006244A1 (en) * 2009-07-17 2011-01-20 Sunopta Bioprocess Inc. Method and apparatus for the heat treatment of a cellulosic feedstock upstream of hydrolysis
EP2454410A4 (en) * 2009-07-17 2014-03-26 Mascoma Canada Inc Method and apparatus for the heat treatment of a cellulosic feedstock upstream of hydrolysis
CN102549213A (en) * 2009-07-17 2012-07-04 马斯科马加拿大有限公司 Method and apparatus for the heat treatment of a cellulosic feedstock upstream of hydrolysis
EP2454410A1 (en) * 2009-07-17 2012-05-23 Mascoma Canada Inc. Method and apparatus for the heat treatment of a cellulosic feedstock upstream of hydrolysis
CN103451987A (en) * 2013-08-23 2013-12-18 湖南骏泰浆纸有限责任公司 Method and device for extracting pre-hydrolysis liquid from dissolving pulp
CN103451987B (en) * 2013-08-23 2015-10-28 湖南骏泰浆纸有限责任公司 A kind of dissolving pulp pre-hydrolyzed solution extracting method and device
WO2020153891A1 (en) * 2019-01-22 2020-07-30 Valmet Ab Process and system for treating vapours released from lignocellulose biomass during acid treatment

Also Published As

Publication number Publication date
NO119058B (en) 1970-03-16
DE1285285B (en) 1968-12-12
ES308163A1 (en) 1965-05-01
FR1420123A (en) 1965-12-03
FI44188B (en) 1971-06-01

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