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1. CA1100266 - PROCEDE DE DELIGNIFICATION ET DE SACCHARIFICATION DE MATIERES VEGETALES LIGNOCELLULOSIQUES

Office
Canada
Numéro de la demande 285821
Date de la demande 31.08.1977
Numéro de publication 1100266
Date de publication 05.05.1981
Numéro de délivrance
Date de délivrance 05.05.1981
Type de publication A
CIB
D21C 3/20
DTEXTILES; PAPIER
21FABRICATION DU PAPIER; PRODUCTION DE LA CELLULOSE
CPRODUCTION DE LA CELLULOSE PAR ÉLIMINATION DES SUBSTANCES NON CELLULOSIQUES DES MATIÈRES CONTENANT DE LA CELLULOSE; RÉGÉNÉRATION DES LIQUEURS NOIRES; APPAREILS À CET EFFET
3Réduction en pâte des matières contenant de la cellulose
20avec des solvants organiques
C07C 51/00
CCHIMIE; MÉTALLURGIE
07CHIMIE ORGANIQUE
CCOMPOSÉS ACYCLIQUES OU CARBOCYCLIQUES
51Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides
C07D 307/50
CCHIMIE; MÉTALLURGIE
07CHIMIE ORGANIQUE
DCOMPOSÉS HÉTÉROCYCLIQUES
307Composés hétérocycliques contenant des cycles à cinq chaînons comportant un atome d'oxygène comme unique hétéro-atome du cycle
02non condensés avec d'autres cycles
34comportant deux ou trois liaisons doubles entre chaînons cycliques ou entre chaînons cycliques et chaînons non cycliques
38avec des radicaux hydrocarbonés substitués liés aux atomes de carbone du cycle
40Radicaux substitués par des atomes d'oxygène
46Atomes d'oxygène liés par des liaisons doubles ou deux atomes d'oxygène liés par des liaisons simples au même atome de carbone
48Furfural
50Préparation à partir de produits naturels
C07G 1/00
CCHIMIE; MÉTALLURGIE
07CHIMIE ORGANIQUE
GCOMPOSÉS DE CONSTITUTION INDÉTERMINÉE
1Dérivés de lignine à bas poids moléculaire
C13K 1/02
CCHIMIE; MÉTALLURGIE
13INDUSTRIE DU SUCRE
KSACCHARIDES, AUTRES QUE LE SACCHAROSE, OBTENUS À PARTIR DE SOURCES NATURELLES OU PAR HYDROLYSE DE DI-, OLIGO- OU POLYSACCHARIDES PRÉSENTS DANS LA NATURE
1Glucose; Sirops glucosés
02obtenus par saccharification de matières cellulosiques
D21C 3/00
DTEXTILES; PAPIER
21FABRICATION DU PAPIER; PRODUCTION DE LA CELLULOSE
CPRODUCTION DE LA CELLULOSE PAR ÉLIMINATION DES SUBSTANCES NON CELLULOSIQUES DES MATIÈRES CONTENANT DE LA CELLULOSE; RÉGÉNÉRATION DES LIQUEURS NOIRES; APPAREILS À CET EFFET
3Réduction en pâte des matières contenant de la cellulose
CPC
C07D 307/50
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
307Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
02not condensed with other rings
34having two or three double bonds between ring members or between ring members and non-ring members
38with substituted hydrocarbon radicals attached to ring carbon atoms
40Radicals substituted by oxygen atoms
46Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
48Furfural
50Preparation from natural products
C13K 1/02
CCHEMISTRY; METALLURGY
13SUGAR INDUSTRY
KSACCHARIDES OBTAINED FROM NATURAL SOURCES OR BY HYDROLYSIS OF NATURALLY OCCURRING DISACCHARIDES, OLIGOSACCHARIDES OR POLYSACCHARIDES
1Glucose
02obtained by saccharification of cellulosic materials
D21C 3/20
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
3Pulping cellulose-containing materials
20with organic solvents ; or in solvent environment
Titre
(EN) ORGANOSOLV DELIGNIFICATION AND SACCHARIFICATION PROCESS FOR LIGNOCELLULOSIC PLANT MATERIALS
(FR) PROCEDE DE DELIGNIFICATION ET DE SACCHARIFICATION DE MATIERES VEGETALES LIGNOCELLULOSIQUES
Abrégé
(EN)
ABSTRACT OF THE DISCLOSURE


Hereby a novel process is described which is
capable to take most any subdidvided, chipped, shredded,
hammermilled lignocellulosic forest and/or agricultural
residue, pure or in mixtures thereof, and with the aid of
a chemical agent,which is essentially a mixture of an
organic volatile solvent with water, such as ethanol or
acetone, acidified with either an inorganic strong acid
such as hydrochloric, sulphuric or phosphoric acid, or
an organic acid such as oxalic, formic, citric, maleic,
plicatic, tannic, tartaric, trichloroacetic or trifluoro-
acetic acid, convert it into pulp, crystalline cellulose,
dissolved chemicals such as sugars, lignins, furfurals and
organic acids in high yield. The process of conversion
is continuous but can be subdivided-into stages according
to the order of product formation. The conditions under
which these products are formed are very conducive to
rapid hydrolysis and usually involve liquor pH at 4 and
lower, a temperature of 160°C but not exceeding 210°C,
and a pressure appropriate with these temperatures and the
cooking liquor composition. Product composition is mainly
influenced by cooking time at maximum specified temperature
and liquor composition,i.e., more than one product mix
can be produced with a single set of temperature/pressure
and cooking liquor composition by merely increasing or
decreasing the exposure time at maximum temperature. The
equipment is so designed that it make possible the production
and recovery of the whole range of chemicals (products)
indicated above. It is a further characteristic of the pro-
cess that it treats most all lignocellulosics with nearly
equal efficiency and thus such plant materials may also be
processed in mixture without serious deterioration of
product quality and process efficiency. A high degree of
cooking chemical recovery is possible and continuous re-
covery is an integral and important part of the process.
Thus this invention does not limit itself to the
solvent system by which such rapid production of high to

low-yield pulps, bulk lignins and sugars and sugar dehyd-
ration products are possible from all types of lignocellu-
losics, neither is it limited to the conditions under which
such flexibility is possible but is also concerned with the
apparatus which would allow efficient, economic, orderly
and controlled high yield manufacture of such a product mix
as outlined in Figure 1.