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JPH05222688A |
PURPOSE: To obtain a base paper excellent in dimensional stability, gloss and curl by bleaching unbleached pulp produced by alkali cooking process followed by enzymatic treatment, putting the resultant pulp to papermaking process, and by...
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JPH05195467A |
PURPOSE: To improve the selectively of delignification of a chemical paper pulp by treating unbleached pulp obtained by cooking operation with a solution of an organic peroxy acid under a specific condition. CONSTITUTION: An unbleached p...
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JPH05195462A |
PURPOSE: To provide a method and apparatus for production of low kappa number (for example, below 20) kraft paper pulp, and a low viscosity black liquor, which is easily transported to a recovery or disposal stage. CONSTITUTION: A commin...
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JPH05163690A |
PURPOSE: To obtain a paper pulp having optimum viscosity/kappa and/or pulp strength property with high yield by making two kinds of white liquor having different sulfur content, sending a high sulfur content white liquor into impregnatio...
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JPH05503965A |
(57) [Summary] Since this publication is application data before electronic filing, summary data is not recorded.
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JPH05148786A |
PURPOSE: To proceed effectively the evaporation of spent liquors and recovery of final products of high quality from spent liquors by dividing at least a vapor side of evaporator unit apparatus and condensing separately vapor contg. diff...
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JPH05125680A |
PURPOSE: To rapidly change pulp to a desired Kappa number level in change of pulp of different kinds by changing an amount of digested liquid fed to a digester and a digestion temperature at a specific time. CONSTITUTION: A mixture of ch...
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JPH05502480A |
PCT No. PCT/EP90/01622 Sec. 371 Date May 18, 1992 Sec. 102(e) Date May 18, 1992 PCT Filed Sep. 25, 1990 PCT Pub. No. WO91/05102 PCT Pub. Date Apr. 18, 1991.In a process for manufacturing chemo-mechanical and/or chemothermal-mechanical wo...
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JPH0551886A |
PURPOSE: To obtain cellulose having very good properties by an organosolve method similar to a sulfate method by impregnating a cellulose plant fiber material with alcohol and thereafter delignificating it under the condition of less alc...
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JPH0514191U |
[Purpose] A batch wooden kettle that employs a cold blow method is used to obtain quality equal to or better than that of pulp produced by a continuous cooking system. [Constitution] A cooking device that crafts and elutes cellulose fibe...
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JPH0480150B2 |
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JPH04333686A |
PURPOSE: To provide a method to treat wood pulp with aluminum hydroxide chloride so as to reduce or eliminate the pitch trouble relating to the production and treatment of pulp. CONSTITUTION: Aluminum hydroxide chloride having at least 7...
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JPH04506544A |
An improved wood pulping process for the delignification of wood in a solvent wherein the solvent is a supercritical fluid under supercritical conditons and contains a delignification agent such as sodium hydroxide, sodium sulfide and/or...
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JPH0470435B2 |
A process and mechanism for cooking fibrous paper pulp including a digester (10) wherein the pulp is cooked under elevated temperatures and pressures for a predetermined time, a discharge line (22) leading form the lower end of the diges...
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JPH0469087B2 |
Particulate silica or silicate made hydrophobic by heat treatment to form a reaction product with a hydrophobic alcohol, process for its preparation, and its use in defoaming compositions.
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JPH0466954B2 |
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JPH04289285A |
PURPOSE: To produce pulp having novel physical properties at a low cost regardless of broadleaf trees or needle-leaf trees without using sulfur and chlorine by using a specific cellulose derivative as an active component. CONSTITUTION: W...
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JPH04272286A |
PURPOSE: To obtain pulp leaving a high whiteness without any toners, dyes, etc., remaining therein by carrying out both flotation after defibrating and screening and flotation after bleaching under specific conditions. CONSTITUTION: Wast...
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JPH04240283A |
PURPOSE: To provide an apparatus and process for the solvent pulping and washing of pulp, facilitating the solvent pulping and washing of the pulp and reducing the loss of an alcohol, by disposing first and second steaming vessels and fi...
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JPH04240282A |
PURPOSE: To provide a method for producing cellulosic pulp, reducing the consumption of a chemical agent and improving the operability, by making a comminuted cellulosic fibrous material and a sulfite cooking liquor flow into an upright ...
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JPH0450428B2 |
A method for producing both kraft pulp and alcohol from hardwood chips or the like. The chips are subjected to mild acid prehydrolysis following by mild caustic pre-extraction. The withdrawn hydrolystate has insufficient furfural to inhi...
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JPH04209886A |
PURPOSE: To decrease the addition amount of cooking liquor and improve the yield of pulp in a modified alkaline digestion process by adding supplementary cyclic keto compound to the liquor. CONSTITUTION: A cooking liquor 17 is added with...
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JPH04209885A |
PURPOSE: To decrease the addition amount of cooking liquor and improve the yield of pulp in a modified alkaline digestion process by adding a cyclic keto compound mainly to a counter flow digestion part of a digester. CONSTITUTION: Fifty...
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JPH04174785A |
PURPOSE: To utilize staple fiber such as shredded paper which has hitherto been discarded and obtain paper at a low cost by reacting a component containing vegetable staple fiber with a crosslinking agent and a polymer under alkaline con...
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JPH04174791A |
PURPOSE: To utilize staple fiber which has been discarded and obtain paper good in bending strength, etc., at a low cost by mixing vegetable staple fiber with pulp and making paper from the aforementioned mixture. CONSTITUTION: Vegetable...
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JPH04502790A |
The present invention solves the problem of delignifying technical cellulose pulp in a selective manner which will result in very low residual contents of lignin in the pulp and a correspondingly high quantity of lignin dissolved in spen...
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JPH04146282A |
PURPOSE: To obtain Japanese paper having the same touch, strength and beauty as those of conventional Japanese paper from a raw material having low use value by boiling skin, stem, etc., of maize, beating into a pasty state, putting in a...
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JPH0429794B2 |
A process for preparing mechanical pulp and/or paper containing the mechanical pulp is described, wherein an acylglycerol lipase is used. The process according to the invention avoids the problems caused by the resins in the preparation ...
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JPH04136286A |
PURPOSE: To continuously prevent the deposition of scale in a digester, etc., by adding a specific amount of an acrylic acid-itaconic acid copolymer (salt) to a digester of a kraft pulp production process. CONSTITUTION: Deposition of sca...
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JPH04126885A |
PURPOSE: To continuously obtain a large amount of chemical pulp by digesting a cellulose raw material with a specific digesting chemical, separating the digested material into solid and liquid to obtain pulp waste liquor and unbleached p...
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JPH0415312B2 |
A modified batch cooking technique for making sulfate pulp with a high degree of delignification or with a normal degree of delignification but with increased pulp viscosity. This is effected by one or several displacements of the liquor...
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JPH0476024A |
PURPOSE:To obtain the title composite at good efficiency by decreasing a lignocellulose material in the obtained reaction system by heating a solvent containing a lignocellulose material and a phenolic compound as the principal component...
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JPH0457982A |
PURPOSE: To accomplish easily in high yield the collection of the high-purity title fiber as a feedstock for paper through utilizing wastes by treating the stems of corn, soybeans and/or potatoes with a specific solution to collect bast ...
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JPH048553B2 |
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JPH047668B2 |
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JPH047669B2 |
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JPH0441789A |
PURPOSE: To efficiently deink printing ink and to obtain the title pulp formula with excellent whiteness by carrying out defibration process and kneading process having a specific old paper pulp concentration and a specific alkali concen...
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JPH0380915B2 |
The present invention relates to a process for producing a chemical paper pulp, wherein woodchips are digested at a defined temperature in an alkaline liquid containing a sulphur compound and the digestion process is stopped at a tempera...
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JPH03260188A |
PURPOSE: To produce a mechanical pulp improved in strength characteristics by subjecting a fibrous material to a chemical treatment and/or an enzymatic treatment and linking lignin in the fibrous material to a binding agent. CONSTITUTION...
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JPH03258797A |
PURPOSE: To extract various useful chemical components effectively and industrially, by filling a dissociated lignocellulosic material in a column, adding water, an alcohol and a dilute aqueous caustic solution, etc., and permitting the ...
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JPH03249290A |
PURPOSE: To obtain a bleached cellulose having high crystallinity, low polymerization degree and narrow polymerization degree distribution by extracting a defibrated lignocellulose substance successively with water, an alcohol and a caus...
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JPH03241098A |
PURPOSE: To efficiently obtain the subject paper without requirement of processes such as dyeing, drying or rebeating by breaking a waste paper having a water-resistant coating layer in water and making a paper using a pulp containing th...
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JPH03234884A |
PURPOSE: To obtain a regenerated pulp causing little paper-breakage trouble in paper-making process and giving a paper having no black spot and few pinholes by dissociating waste heat-sensitive recording paper in an alkaline aqueous solu...
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JPH0362836B2 |
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JPH03220388A |
PURPOSE: To accomplish pulping and bleaching causing no cellulose consumption and without the need for adding nutrient sources and/or cellulose degradation inhibitor by performing a biological treatment of wood chips, etc., using microor...
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JPH03213591A |
PURPOSE: To obtain pulp inexpensively and industrially with saved energy without adding a nutrition source and cellulose decomposition inhibitor by treating wood chip with microorganisms. CONSTITUTION: Wood chip or pulp prepared by refin...
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JPH0355598B2 |
A process is provided for preparing cellulose pulp by delignification of lignocellulosic material, which comprises subjecting particulate lignocellulosic material in a pulping zone to the pulping action of a pulping liquor at a temperatu...
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JPH03180583A |
PURPOSE: To provide the subject neutral paper containing a wood pulp produced using a specified chemical such as NaOH as the digesting agent, having a pH within a specified range, capable of production at a low cost, free from bad influe...
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JPH03174078A |
PURPOSE: To obtain mechanical pulp with the refining energy reduced despite a shortened treatment time in no need of sterilization of the stock by treating a fibrous product with an enzyme to allow the enzyme to act on the lignin in the ...
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JPH03174079A |
PURPOSE: To obtain mechanical pulp with attainment of the refining energy reduction despite a shortened treatment time without needing sterilization of the stock by treating a fibrous product with an enzyme to allow the enzyme to act on ...
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