CN111848823A - 酯醇竹木纤维素及其制备方法 - Google Patents
酯醇竹木纤维素及其制备方法 Download PDFInfo
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- CN111848823A CN111848823A CN202010834146.1A CN202010834146A CN111848823A CN 111848823 A CN111848823 A CN 111848823A CN 202010834146 A CN202010834146 A CN 202010834146A CN 111848823 A CN111848823 A CN 111848823A
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- parts
- bamboo
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- fine
- cellulose
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 176
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 176
- 241001330002 Bambuseae Species 0.000 title claims abstract description 176
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 176
- 239000011425 bamboo Substances 0.000 title claims abstract description 176
- 229920002678 cellulose Polymers 0.000 title claims abstract description 148
- 239000001913 cellulose Substances 0.000 title claims abstract description 146
- 239000002023 wood Substances 0.000 title claims abstract description 139
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 150000002148 esters Chemical class 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 53
- 238000003756 stirring Methods 0.000 claims abstract description 50
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 47
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims abstract description 34
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 claims abstract description 16
- 241000723346 Cinnamomum camphora Species 0.000 claims abstract description 16
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229960000846 camphor Drugs 0.000 claims abstract description 16
- 229930008380 camphor Natural products 0.000 claims abstract description 16
- 235000002906 tartaric acid Nutrition 0.000 claims abstract description 16
- 239000011975 tartaric acid Substances 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000003381 stabilizer Substances 0.000 claims abstract description 15
- 238000004821 distillation Methods 0.000 claims abstract description 14
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004202 carbamide Substances 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000003197 catalytic effect Effects 0.000 claims abstract description 9
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 7
- 238000000889 atomisation Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 235000010980 cellulose Nutrition 0.000 claims description 145
- 239000000843 powder Substances 0.000 claims description 110
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 48
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 42
- 235000019441 ethanol Nutrition 0.000 claims description 42
- 239000000835 fiber Substances 0.000 claims description 39
- 229920002522 Wood fibre Polymers 0.000 claims description 35
- 239000002025 wood fiber Substances 0.000 claims description 35
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 28
- 239000000047 product Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 22
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 239000011265 semifinished product Substances 0.000 claims description 15
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 14
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 13
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 11
- 238000007605 air drying Methods 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 9
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 9
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 7
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000006386 neutralization reaction Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000012452 mother liquor Substances 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 238000009736 wetting Methods 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 8
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 6
- 230000001376 precipitating effect Effects 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 3
- 230000000802 nitrating effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 239000003814 drug Substances 0.000 description 12
- 238000001514 detection method Methods 0.000 description 10
- 239000003513 alkali Substances 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 238000006396 nitration reaction Methods 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000003203 everyday effect Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 238000000967 suction filtration Methods 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000173782 Ficus hirta Species 0.000 description 1
- 241000208977 Polygalaceae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B43/00—Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
- C06B45/02—Compositions or products which are defined by structure or arrangement of component of product comprising particles of diverse size or shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/05—Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur
- C08B15/06—Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur containing nitrogen, e.g. carbamates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010834146.1A CN111848823A (zh) | 2020-08-18 | 2020-08-18 | 酯醇竹木纤维素及其制备方法 |
Applications Claiming Priority (1)
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CN202010834146.1A CN111848823A (zh) | 2020-08-18 | 2020-08-18 | 酯醇竹木纤维素及其制备方法 |
Publications (1)
Publication Number | Publication Date |
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CN111848823A true CN111848823A (zh) | 2020-10-30 |
Family
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Family Applications (1)
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CN202010834146.1A Pending CN111848823A (zh) | 2020-08-18 | 2020-08-18 | 酯醇竹木纤维素及其制备方法 |
Country Status (1)
Country | Link |
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CN (1) | CN111848823A (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113121312A (zh) * | 2020-01-13 | 2021-07-16 | 潘小秋 | 一种稻谷乙醇钾氧化剂及其制备方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101302410A (zh) * | 2008-06-04 | 2008-11-12 | 江南大学 | 一种接枝改性蛋白基胶粘剂的制备方法 |
CN101768220A (zh) * | 2009-11-27 | 2010-07-07 | 北京理工大学 | 用落地棉制备羧甲基纤维素的方法 |
CN102795949A (zh) * | 2012-09-12 | 2012-11-28 | 潘小秋 | 无烟纤维素 |
CN103769186A (zh) * | 2012-10-24 | 2014-05-07 | 中国石油化工股份有限公司 | 蒽醌加氢催化剂及其制备方法 |
US20140248270A1 (en) * | 2006-03-01 | 2014-09-04 | Ruey J. Yu | Method for topical treatment of tar-responsive dermatological disorders |
CN105884250A (zh) * | 2016-03-31 | 2016-08-24 | 黄山瑞盛新材料科技有限公司 | 一种聚合物防护装饰胶浆 |
CN109797593A (zh) * | 2017-11-16 | 2019-05-24 | 江苏三富纤维科技有限公司 | 一种常温、常压下精制棉的清洁生产工艺 |
-
2020
- 2020-08-18 CN CN202010834146.1A patent/CN111848823A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140248270A1 (en) * | 2006-03-01 | 2014-09-04 | Ruey J. Yu | Method for topical treatment of tar-responsive dermatological disorders |
CN101302410A (zh) * | 2008-06-04 | 2008-11-12 | 江南大学 | 一种接枝改性蛋白基胶粘剂的制备方法 |
CN101768220A (zh) * | 2009-11-27 | 2010-07-07 | 北京理工大学 | 用落地棉制备羧甲基纤维素的方法 |
CN102795949A (zh) * | 2012-09-12 | 2012-11-28 | 潘小秋 | 无烟纤维素 |
CN103769186A (zh) * | 2012-10-24 | 2014-05-07 | 中国石油化工股份有限公司 | 蒽醌加氢催化剂及其制备方法 |
CN105884250A (zh) * | 2016-03-31 | 2016-08-24 | 黄山瑞盛新材料科技有限公司 | 一种聚合物防护装饰胶浆 |
CN109797593A (zh) * | 2017-11-16 | 2019-05-24 | 江苏三富纤维科技有限公司 | 一种常温、常压下精制棉的清洁生产工艺 |
Non-Patent Citations (2)
Title |
---|
GABOV, KONSTANTIN 等: "Hydrotropic Fractionation of Birch Wood into Cellulose and Lignin: A New Step Towards Green Biorefinery", 《BIORESOURCES》 * |
李志西: "苹果渣资源化利用研究与实践", 《中国博士学位论文全文数据库(电子期刊) 工程科技I辑》 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113121312A (zh) * | 2020-01-13 | 2021-07-16 | 潘小秋 | 一种稻谷乙醇钾氧化剂及其制备方法 |
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Effective date of registration: 20210805 Address after: 410300 No. 49, Shishuang Road, Jili street, Liuyang City, Changsha City, Hunan Province Applicant after: Hunan Xusheng New Material Technology Co.,Ltd. Address before: 410300 No.30, building 1, fireworks community, 101 Shuangyong Road, Liuyang City, Changsha City, Hunan Province Applicant before: Pan Xiaoqiu Applicant before: Shen Pingxiu Applicant before: Tang Daihua |
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WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201030 |