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1. (WO2017178849) A CONTINUOUS PROCESS FOR PRODUCTION OF CELLULOSE PULP
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2017/178849 International Application No.: PCT/HR2016/000014
Publication Date: 19.10.2017 International Filing Date: 15.04.2016
IPC:
D21C 3/02 (2006.01) ,D21C 9/10 (2006.01) ,D21C 9/16 (2006.01) ,D21C 11/00 (2006.01) ,D21H 11/12 (2006.01)
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
3
Pulping cellulose-containing materials
02
with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9
After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
10
Bleaching
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9
After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
10
Bleaching
16
with per compounds
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
C
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
11
Regeneration of pulp liquors
D TEXTILES; PAPER
21
PAPER-MAKING; PRODUCTION OF CELLULOSE
H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
11
Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
12
Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
Applicants:
MIKULIC, Marinko [HR/HR]; HR
Inventors:
MIKULIC, Marinko; HR
Agent:
BIHAR, Zeljko; Admoveo d.o.o. Gracanska cesta 111 10000 Zagreb, HR
Priority Data:
Title (EN) A CONTINUOUS PROCESS FOR PRODUCTION OF CELLULOSE PULP
(FR) PROCESSUS CONTINU DESTINÉ À LA PRODUCTION DE PÂTE DE CELLULOSE
Abstract:
(EN) The present invention discloses the continuous process for production of cellulose pulp of very high whiteness from grass-like plant feedstock suitable for paper making. Process comprising the steps of: preparing the grass-like plant feedstock by comminuting; dedusting; continuous digestion with optimized concentrations of NaOH and NaCl; disperging; continuous bleaching with optimized concentrations of H2O2 and sodium silicate without the use of NaOH; optional disperging; dewatering to remove the black liquor; and washing, to yield final cellulose pulp of very high whiteness, >90%, suitable for manufacturing of paper or cellulose sheets. The process additionally includes integrated electrolytic removal of lignin and other by-products accompanied with regeneration of cooking chemicals solution, what enables completely closed process materials cycle. In one form of invention, heating of digesting and bleaching steps can be optionally performed by microwave (MW) heating. The preferred grass-like feedstock for the process is miscanthus (Miscanthus x giganteus, Andersson).
(FR) La présente invention concerne un processus continu destiné à la production de pâte de cellulose à blancheur très élevée à partir de matière première végétale de type herbe appropriée pour la fabrication de papier. Le processus comprend les étapes suivantes : préparation de la matière première végétale de type herbe par fragmentation; dépoussiérage; digestion continue avec des concentrations optimisées de NaOH et de NaCl; dispersion; blanchiment continu avec des concentrations optimisées de H2O2 et de silicate de sodium sans l'utilisation de NaOH; dispersion facultative; déshydratation pour éliminer la liqueur noire; et lavage, pour obtenir une pâte de cellulose finale à blancheur très élevée, > 90 %, appropriée pour la fabrication de feuilles de cellulose ou de papier. Le processus comprend en outre l'élimination électrolytique intégrée de lignine et d'autres sous-produits, accompagnée de la régénération de solution de produit chimique de cuisson, ce qui permet un cycle de matériaux de traitement complètement fermé. Dans un mode de réalisation de l'invention, le chauffage des étapes de digestion et de blanchiment peut être éventuellement effectué par chauffage par micro-ondes (MW). La matière première de type herbe préférée pour le processus est le miscanthus (Miscanthus x giganteus, Andersson).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)