http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108179647-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C3-022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C3-222 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-1036 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C5-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C5-005 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C9-163 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D21C3-026 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C5-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C3-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D21C9-16 |
| filingDate | 2018-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108179647-B |
| titleOfInvention | Preparation method of chlorine-free slightly-bleached softwood pulp |
| abstract | The invention provides a preparation method of chlorine-free slightly-bleached softwood pulp, belonging to the field of slurry preparation, and the method takes softwood as a raw material, and firstly dissolves out lignin through a DDS replacement cooking production process; then, carrying out primary oxygen removal on the slurry obtained by DDS replacement cooking, softening fibers and removing lignin; and finally, carrying out treatment by two-stage oxygen removal and biological enzyme bleaching assistance to degrade LCC (cellulose C) connecting bonds between lignin and carbohydrates, degrading xylan adsorbed and precipitated on the surface of the fiber in the cooking process, and destroying colored groups in the lignin structure. The invention adopts DDS replacement cooking production process and is matched with OAB + biological enzyme micro-bleaching technology to produce environment-friendly pulp, and the produced product not only performs micro-bleaching to change color, but also realizes chlorine-free. The variety produced by using the chlorine-free slightly-bleaching environment-friendly unbleached pulp can replace imported high-end products, all indexes reach the export European Union standard, and the pulp can be used for producing high-grade packing paper, paper for industrial technology and paper for natural color or primary color living. |
| priorityDate | 2018-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.