US2218897A - Method of treating woody material - Google Patents

Method of treating woody material Download PDF

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Publication number
US2218897A
US2218897A US17979237A US2218897A US 2218897 A US2218897 A US 2218897A US 17979237 A US17979237 A US 17979237A US 2218897 A US2218897 A US 2218897A
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pressure
material
mass
temperature
high
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Skutl Viktor
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Skutl Viktor
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/04Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00Solid fuels
    • C10L5/02Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34Other details of the shaped fuels, e.g. briquettes
    • C10L5/36Shape
    • C10L5/363Pellets or granulates
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00Solid fuels
    • C10L5/40Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • C10L5/442Wood or forestry waste
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste

Description

Patented oct. 2 2, 1940 UNITED 'STATES METHOD OF TREATING WOODY MATERIAL Viktor Skutl, Leoben, Styria, Austria Application December 14, 19,37, Serial No. 179,792

In Austria December 19, 1936 2 Claims.

This invention relates to a method of treating wood, its constituents, peat, and the like, and to the products therebyobtained.

It is already known to heat wood, its constituents, peat, and the like in closed vessels in the presence of Water or steam to 100 C. or still higher temperatures, and to mold under pressure the thus steamed material, after allowing the same to cool and after relief of the pressure thereon. The molded articles thus obtained, which have a relatively high water content, show clearly the structure of the-starting materials used.

Now I have found that by suitably increasing the temperature in the pressure-tight vessels during the steaming treatment, and simultaneously bringing a suitably high mechanical pressure to bear, there is obtainable from wood, its constituents, peat, and the like a mass which is practically structureless and which is distinguished by low Water content. The temperature of the heating in the presence of steam, and the pressure exerted, must be so high that a complete or at least almost complete homogenizing of the mass occurs. The higher the temperature at which this treatment is` carried out the lower the pressure may be.' and vice-versa. If the steaming is carried out at a temperature of about 200 C., or at a temperature in excess of this figure, it is sufficient, for the production`ofthe molded articles according to the present invention, to exert mechanically la pressure of the order of the pressure required in shaping the articles, since the mass is already homogenized by the steaming treatment at high temperature. In. this conversion the temperature .used is also dependent on the material, for example on the kind of Wood used, and is generally speaking lower in the case of deciduous woods than in 40 the case of pine wood. 'Ihe presence of traces of products of the distillation of coal appear, however, to promote the conversion. If on the other hand the steaming is carried out at a temperature of about 150 C. the mechanically exerted pressure required for homogenizin'g and molding amounts to 100 atm. and more. At tempertures below 150 C. the breaking down of the structure of the starting material occurs but imperfectly, even if the pressures exerted in the press are of the order of several hundred atmospheres. For the obtaining of the final product of the process according to the invention it is relatively immaterial whether" cooling takes place or not between the step of producing the pulp and that of molding the same under pressure. -It is thus equally possible either iirst to produce the pulp and then to subject this pulp, if desired after cooling, to heat and pressure in pressure-tight vessels in the presence of steam or water, or to carry out both phases in one and the same working operation and in the same pressure tight vessels. 4

As an example of a pressure-tight vessel which may be used for carrying out the process of the present invention, reference is made to the attached drawing. l

The vessel I is closed by a cover 2 carrying a 'hydraulic cylinder 3 with a piston 4. The inlet oi the pressure water to the cylinder 3 is denoted by 5. VWithin the vessel I there is arranged a form or mold 6 receiving the material to be treated and cooperating with the piston 4. Saturated steam is introduced into the vessel through the inlet 1. After the material to be treated has been placed in the form 6 and the vessel I has been closed, steam at a temperature substantially between C. and 200 C. isv admitted through 1 until the material is suiciently heated, and then the piston 4 is lowered and the material compressed to form the shaped body desired in the mold 6. In this way heat treatment and compression is effected in one and the same working operation and inthe same pressure-tight vessel. Obviously modifications of this vessel may be made without departing from the spirit of the invention.

The molded articles obtained in accordance with the invention are waterproof, of considerable hardness, and have but slight ash content with high carbon content. Owing to its homogeneity and plasticity the mass may be used, either by itself or in commixtu're with known lling materials, for thefproduction of molded blanks for useful articles of al1 kinds, such as for instance handles,'gun-stocks, and the like. Owing to its high electric resistance the mass is also suitable for the production of insulating material, for which purpose there may also be added to the mass resins or synthetic resins, the latter also in the form of their components. In View of its low ash content this mass, or molded bodies formed therefrom, if desired with the admixture of other high quality fuels, are also suitable, after grinding, for use as fuel in internal combustion engines such as coal dust Diesel engines and the like.

The mass obtained in accordance with the invention is also suitable for use as a binder in briquetting diiiicultly moldable fuels.` The pulpy mass, or a suspension of ground up molded bodies y 150 C. and under a mechanical pressure of at least 100 atmospheres, until a practically berless homogeneous material is obtained, and molding said material by the action of heat and mechanically exerted pressure in the presence of saturated steam in the same pressure-tight vesto form molded solid masses oi low water and ash content.

2. A process as claimed in claim 1, wherein the practically Ilberless homogeneous material is 10 cooled before molding.

V'IKTOR SKUTL.

US2218897A 1936-12-19 1937-12-14 Method of treating woody material Expired - Lifetime US2218897A (en)

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AU2218897X 1936-12-19

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480851A (en) * 1947-02-05 1949-09-06 Us Sheetwood Company Method for rapid manufacture of sheet lumber
US2581654A (en) * 1949-11-21 1952-01-08 Plywood Res Foundation Dry process for making composite consolidated products with controlled presteaming of the raw materials
US3950143A (en) * 1972-07-14 1976-04-13 The Kingsford Company Process for producing solid industrial fuel
US3981338A (en) * 1974-12-04 1976-09-21 Jones Charles A Method of making a compressed wood panel from peeled logs
US4147518A (en) * 1977-03-02 1979-04-03 Pine Rest Christian Rehabilitation Services Extrusion apparatus for making fire kindling device
EP0460235A1 (en) * 1989-12-25 1991-12-11 Hisaka Works Limited Method and apparatus for treating wood
WO2003106591A1 (en) * 2002-06-17 2003-12-24 Elkem Asa A method for making a charcoal precursor and a method for making charcoal

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480851A (en) * 1947-02-05 1949-09-06 Us Sheetwood Company Method for rapid manufacture of sheet lumber
US2581654A (en) * 1949-11-21 1952-01-08 Plywood Res Foundation Dry process for making composite consolidated products with controlled presteaming of the raw materials
US3950143A (en) * 1972-07-14 1976-04-13 The Kingsford Company Process for producing solid industrial fuel
US3981338A (en) * 1974-12-04 1976-09-21 Jones Charles A Method of making a compressed wood panel from peeled logs
US4147518A (en) * 1977-03-02 1979-04-03 Pine Rest Christian Rehabilitation Services Extrusion apparatus for making fire kindling device
EP0460235A1 (en) * 1989-12-25 1991-12-11 Hisaka Works Limited Method and apparatus for treating wood
EP0460235A4 (en) * 1989-12-25 1992-05-27 Hisaka Works Limited Method and apparatus for treating wood
US5247975A (en) * 1989-12-25 1993-09-28 Hisaka Works Limited Wood treating method and apparatus
WO2003106591A1 (en) * 2002-06-17 2003-12-24 Elkem Asa A method for making a charcoal precursor and a method for making charcoal

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