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JPS5415004A |
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JPS5415006A |
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JPS5415003A |
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JPS5415001A |
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JPS548177A |
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JPS53139803A |
An improved alkaline lignocellulosic pulping process wherein improved colour in the resultant pulp is obtained by using an excess of alkali based on the lignocellulosic material. Improved pulp strength is obtained by operating the delign...
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JPS53139804A |
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JPS53139802A |
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JPS5345402B2 |
Lignocellulose materials (a) are delignified by treatment in a closed reactor with a pulping liq. (b) contg. (1) akali, (2) 0.001-10% based on the wt. of material (a), of a cyclic ketone, viz. naphthoquinone; anthraquinone; anthrone; phe...
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JPS5345404B2 |
Delignification of lignocellulosic material, such as wood, straw or bagasse, by treatment with an alkaline pulping liquor containing a diketo hydroanthracene selected from the unsubstituted and lower alkyl substituted Diels Alder adducts...
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JPS5345403B2 |
Delignification of lignocellulosic material, such as wood, straw or bagasse, with a soda pulping liquor containing a diketo hydroanthracene selected from the unsubstituted and lower alkyl-substituted Diels Alder adducts of naphthoquinone...
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JPS5343201B2 |
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JPS53130303A |
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JPS53130302A |
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JPS53130304A |
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JPS53126302A |
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JPS53122801A |
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JPS53119303A |
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JPS53119302A |
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JPS5336043B2 |
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JPS53111102A |
Process for feeding fibrous ligno-cellulose crude through a tubular conduit, to a container whose interior contains steam placed under pressure in a zone of up to 21.1 kg/cm2, characterized in that the material is compressed within a sec...
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JPS53111103A |
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JPS5335161B1 |
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JPS5331965B2 |
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JPS5331962B2 |
A method is described for increasing the yield of pulp obtained from an alkaline pulping process. A lignocellulosic material, such as wood chips, is first pretreated with an aqueous solution containing from 0.1 to 10% by weight of monoet...
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JPS5331964B2 |
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JPS5394602A |
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JPS5328522B2 |
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JPS5328521B2 |
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JPS5327361B2 |
A process for accurately controlling the intrinsic viscosity of sulfite pulp at the termination of a digestion operation comprising predetermining the duration of digestion time required to obtain a given pulp intrinsic viscosity for a r...
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JPS5386808A |
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JPS5386807A |
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JPS5325046B2 |
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JPS5325044B2 |
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JPS5325042B2 |
A process is provided for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material with alkaline sodium and sulfur-containing-sulfate pulping liquor, which comprises evaporating and b...
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JPS5325045B2 |
A process for the alkaline cooking and delignification of cellulosic materials using a vertical reactor under pressure comprising in order an alkaline cooking zone, a washing zone and a delignification zone with displacement of the liquo...
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JPS5381704A |
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JPS5381705A |
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JPS5381702A |
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JPS5381703A |
Bleached cellulose fibre pulp are prepd. by first cooking a cellulose fibre material, pref. wood, then sepg. the pulp from the spent cooking liquor (I). (I) is then evapd., and burnt in an oven to give a melt which is dissolved up to giv...
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JPS5379085A |
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JPS5322562B2 |
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JPS5322561B2 |
Arrangement for bleaching a slurry of wood cellulose material, by means of a gaseous or liq. bleaching agent, consisting of a feed pipe to the lower part of a bleach tower feeding the wood cellulose material into and upwards through the ...
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JPS5370102A |
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JPS5318601B2 |
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JPS5361702A |
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JPS5360958A |
For the manufacture of thermoformable panels from lignocellulosic fibres containing 20 to 100 % of recovered fibres originating especially from recycled paper, at least a proportion of the fibres in a suspension of fibres in water formin...
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JPS5358004A |
G16-214 PROCESS FOR THE PULPING OF LIGNOCELLULOSIC MATERIAL WITH ALKALI AND QUINONES OR HYDROQUINONES A process is provided for the alkaline pulping of lignocellulosic material with sodium hydroxide as the active alkali, which is capable...
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JPS5352702A |
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JPS5313001B2 |
Method for producing pulp for use in the manufacture of kraft type products such as linerboard and bag grade paper comprising the steps of steaming small segments of fibrous material, defiberizing the same in a pressurized atmosphere and...
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