CN106087089B - A kind of system that microbial co culture pretreatment corn stover prepares viscose rayon - Google Patents
A kind of system that microbial co culture pretreatment corn stover prepares viscose rayon Download PDFInfo
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- CN106087089B CN106087089B CN201610684324.0A CN201610684324A CN106087089B CN 106087089 B CN106087089 B CN 106087089B CN 201610684324 A CN201610684324 A CN 201610684324A CN 106087089 B CN106087089 B CN 106087089B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
Abstract
A kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, it contains using the maize straw skin after corn stover stalks of rice, wheat, etc. leaf and skin separation as raw material, microbial co culture is utilized by the rumen microorganism of special installation fermentation realization biomass degradation and rumen microorganism degradation product or metabolite, hemicellulose and unstable fine element in degrading straw skin, it can separation and fermentation product in situ by regulation, realize maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic, the dyeing or bleaching of continuous boiling removing lignin and cellulose are carried out under anoxybiotic environment, cellulose pulp directly carries out the dissolving spinning of viscose rayon containing certain moisture after centrifugation, or melt spinning prepares viscose rayon under drying regime.The medicament that Biological Pretreatment reduces subsequent boiling delignification uses, and then reduces pollution；Anoxybiotic boiling will greatly reduce slurries oxidation blackening, and then reduce pollution；The characteristic for maintaining original fiber is maximized simultaneously.
Description
Technical field
The present invention relates to biomass to prepare viscose rayon method, exhausted more particularly, to being pre-processed using microbial co culture
The method of corn stover viscose rayon is continuously prepared under the conditions of oxygen.
Background technique
In recent years, appearance is a variety of using corn stover as raw material, and biological method is utilized to prepare biological quality of biomass viscose rayon
Method.The direct utilization chemical preparation pulp slurrying having prepares viscose rayon again, but seriously polluted；Some selection enzyme preparations are pre-
Viscose rayon is prepared after processing biomass, but enzyme preparation cost is excessively high；Some selection dilute acid pretreatments, it is same seriously polluted；
Some selection oxygen consumption microbial pretreatment corn stovers, since oxygen consumption fermentation production rate is lower；Some selection anaerobe fermentations,
But Batch fermentation equipment is used, pre-processing period is long；Though have by Anaerobic Treatment, be not continuous slurrying and spinning, opening
It puts to prepare under environment and also needs to handle a large amount of black liquor.Using corn stover as raw material, it would be desirable to be able to consume low, the time is short, high-efficient biology
Pretreatment system continuously prepares the viscose rayon of high-quality and black liquor pollution is greatly lowered.
Summary of the invention
Described for the existing above problem, a kind of microbial co culture pretreatment corn stover prepares viscose rayon
System, contain using corn stover as substrate, pass through special installation fermentation and realize biomass degradation rumen microorganism and cud
Microbial degradation object or metabolite reduce slurrying and prepare viscose glue fibre using microbial co culture pretreatment corn stover
Dimension pollution, feature, using carry out corn stover stalks of rice, wheat, etc. leaf and skin separation after maize straw skin as raw material, it is same using rumen microorganism
Rumen microorganism degradation product or metabolite are co-cultured using bacterium anaerobism, hemicellulose and unstable fine element in degrading straw skin,
By regulation can separation and fermentation product in situ, realize maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic,
The dyeing or bleaching of continuous boiling removing lignin and cellulose are carried out under anoxybiotic environment, cellulose pulp is containing after centrifugation
The dissolving spinning of viscose rayon is directly carried out in the case of certain moisture, or melt spinning prepares viscose rayon under drying regime.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature, corn stalk
Stalk is cut into the piece of 30mm ~ 40mm by the maize straw skin that stalks of rice, wheat, etc. leaf and skin seperator separate, and Separation by vibration content of lignin is higher
Stalk knot after, be ground into 3 ~ 10mm particle, the fibre length demand of viscose rayon is in 1 ~ 3mm, due to using Biological Pretreatment,
Chemical agent is smaller to fiber destruction using less, and the preferred size that straw skin crushes is 3 ~ 5mm, and the not oxygenous water of use impregnates
Stalk dispels intracellular oxygen, for subsequent microbial fermentation, uses as substrate, goes oxygen scavenger oxygen there are many method, with adding
Hydrogen oxygen water effect of dispelling is optimal, because of mainly good reducing condition, guarantees the survival of Rumen Fungi.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature co-cultures
Microorganism realizes rumen microorganism most degradation efficiency, exceeds single Rumen Fungi or Bacteria Culture degrading straw effect, altogether
Culture microorganism belong to symbiosis, with rumen microorganism co-culture microorganism or metabolite inhibit other side's harmful bacteria
It generates, or promotes rumen microorganism to grow using rumen microorganism metabolite, system is kept to stablize；Can there are many side
Formula chooses the Rumen Fungi isolated with ruminant bovine rumen and co-cultures rumen bacteria, and preferably: Bacteroides succinogenes are drawn
Fourth title: Fibrobacter succinogenes；It chooses and co-cultures saccharomycete bacterium with ruminant tumor gastric fungi, preferably:
1426 latin name of candida tropicalis CICC: Candida tropicalis；It chooses and is co-cultured with ruminant tumor gastric fungi
Butanol bacterium is produced, preferably: clostridium acetobutylicum CICC 8012, latin name: Clostridium acetobutylicum；It chooses
Lactic acid-producing bacteria is co-cultured with ruminant tumor gastric fungi, preferably: Pediococcus acidilactici CICC 10146, latin name:
Pediococcus acidilactic；It chooses ruminant tumor gastric fungi and produces butyric acid alcohol bacterium and co-culture, clostridium butyricum is preferred:
20036 latin name of CICC: Clostridium butyricum；Unstable cellulose and hemicellulose in degrading maize straws skin
Element, generating portion monomer and highly crystalline lignocellulosic, Rumen Fungi are that can isolate out of a variety of ruminant tumor gastrics, can
Isolated kind is it is well known that it is preferred that the Rumen Fungi Neocallimastix frontalis single centre thallus of ox, more flagellums
Zoospore, silk abundant strengthen rhizoid, and the cud volume of ox is larger, and Rumen Fungi is just being suitble to the fermentation of larger volume equipment, altogether
Culture strain bacterium is bought in Chinese industrial Culture Collection, pre-processes in addition to life unstable in degrading straw skin
Substance can also prepare Partial fermentation product, improve benefit, and tunning offsets Biological Pretreatment cost, part organic acid
Fermentation can be also used for the neutralization of lye.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature will tame
Co-cultivation microorganism afterwards and the straw skin for dispelling oxygen ferment in a kind of continuous flow culture system, and tunning is logical
It crosses continuous culture system and is separated by membrane separation device in situ, do not generate antagonism, fermentation time is 12 ~ 48 hours, complete
At the pretreatment of maize straw skin, the preferably time 30 hours, microorganism was co-cultured only in continuous product culture and product point
From can be only achieved optimal degradation effect in device, no person microorganism enzyme activity has the reduction of an order of magnitude.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature, in anaerobism
Lignocellulosic after fermentation enters the continuously cooking system of anoxybiotic, boiling delignification under totally-enclosed environment oxygen free condition
The auxiliary agent used, which is similarly, dispels oxygen solution.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature, complete close
Cellulose and continuously cooking raffinate body are separated under the conditions of envelope, cellulose enters the lower desanding workshop section for closing anaerobic together, with laggard
Entering beating equipment, cellulosic degree of polymerization is controlled by mashing, boiling raffinate body is concentrated under anoxybiotic environment by ceramic membrane, due to
There is no the lignin reaction under oxygen and medicament removing, liquid color is shallower.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature is isolated
Part corn stalk fiber cellulose fiber keep entering next process dyeing in the case of primary colors and workshop section or do not dye, using primary colors
Direct staining will reduce bleaching process on the basis of preparing viscose rayon or primary colors, and then reduce environmental pollution；The part isolated
Corn stalk fiber cellulose fiber is bleached in anoxybiotic, to meet other needs.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature, primary colors dye
The corn stalk fiber pulp of color is centrifuged in anoxybiotic, is being contained 10% ~ 30% moisture, is being entered dissolution in the case of preferably 20%
The direct dissolving spinning of slurry process, it is energy saving without being completely dried, while anoxybiotic continuous spinning, the original performance of fiber are protected
Shield.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon is contained with corn
Stalk is substrate, is fermented by special installation and realizes biomass degradation microorganism and rumen microorganism degradation product or metabolite benefit
Corn stover, feature are pre-processed with microbial co culture, bleaching corn stalk fiber pulp is centrifuged in anoxybiotic, is containing
In the case of having 10% ~ 30% moisture, preferably 20%, which enters the dissolution direct dissolving spinning of slurry process, prepares viscose rayon, since solvent is spun
Silk is also needed using lye, endless white drying pulp oneself spinning, is reduced for the dry energy, the original performance of fiber is protected
Shield.
Described, a kind of system that microbial co culture pretreatment corn stover prepares viscose rayon, feature, primary colors dye
Melt spinning, which is directly carried out, after color or the centrifugation drying of the pulp of bleaching prepares viscose rayon.
Compared with prior art, the advantages of the present invention are:
1. rumen microorganism co-cultures the hemicellulose and unstable cellulose in high efficiency, low cost degrading maize straws, drop
The medicament of low subsequent boiling delignification uses, and then reduces pollution；
2. degrading straw under anaerobic, while ensure that anoxic condition, item is created for subsequent anoxybiotic continuously cooking
Part, anoxybiotic boiling will greatly reduce slurries oxidation blackening, overall process anoxybiotic, and continuous closed operation avoids oxidation blackening, then bleaches
Technique reduces night generation from mechanism, and then reduces pollution；
3. the reduction of conditions of cooking, while maximizing and maintaining the original characteristic of fiber；
4. rumen microorganism will etch fiber to the degradation of stalk fibre labile element, improve fiber moisture absorption ratio, into
And high performance viscose rayon can be prepared；
5. using the primary colors dyeing of fiber, direct fiber primary colors dyeing eliminates bleaching process, reduces to ring
The influence in border.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings:
A kind of microbial co culture pretreatment corn stover of Fig. 1 prepares the system schematic of viscose rayon.
Specific embodiment
For a better understanding of the present invention, below with specific example come the technical solution that the present invention will be described in detail, but this
Invention is not limited thereto.
Embodiment 1
To carry out the maize straw skin after corn stover stalks of rice, wheat, etc. leaf and skin separation as raw material, choose from ruminant bovine rumen point
Cud Rumen Fungi Neocallimastix frontalis and rumen bacteria the Fibrobacter succinogenes separated out
It co-cultures, hemicellulose and unstable fine element in degrading straw skin；By the co-cultivation microorganism after domestication and dispel the straw of oxygen
Stalk skin ferments in a kind of continuous flow culture system, and tunning is separated by continuous culture system membrane separation device,
Do not generate antagonism, fermentation time is 48 hours, completes the pretreatment of maize straw skin, unstable in degrading maize straws skin
Cellulose and hemicellulose, generating portion monomer and highly crystalline lignocellulosic；By regulation can separation and fermentation product in situ,
Realize maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic；Lignocellulosic after anaerobic fermentation, complete
Enter the continuously cooking system of anoxybiotic under enclosed environment oxygen free condition, the medicament agent that boiling delignification uses, which is similarly, dispels oxygen
Gasoloid separates cellulose and continuously cooking raffinate body under the conditions of hermetically sealed；Cellulose enters removing for lower closing anaerobic together
Sand workshop section, subsequently enters beating equipment, controls cellulosic degree of polymerization by mashing, boiling raffinate body leads to for 99 DEG C under anoxybiotic environment
Ceramic membrane concentration is crossed, concentrate is used for subsequent industrial utilization, and COD value 100 reduces corn stover tradition slurrying pollution；In anoxybiotic
Continuous boiling removing lignin is carried out under environment；The part corn stalk fiber cellulose fiber isolated keep in the case of primary colors into
Enter next process workshop section, fiber cellulose content≤93%；The corn stalk fiber pulp of primary colors is centrifuged in anoxybiotic, is being contained
Have and enters the dissolution direct dissolving spinning of slurry process in the case of 10% moisture, it is dry disconnected to split strong degree≤2.5cN/dtex, dry elongation at break
≤ 16%. Shi Duan split Qiang Du≤1.5cN/dtex, and regain reaches 15% or more.
Embodiment 2
Using carry out corn stover stalks of rice, wheat, etc. leaf and skin separation after maize straw skin as raw material, it is micro- with cud using rumen microorganism
Biologicallydegraded effluent or metabolite are co-cultured using bacterium anaerobism, hemicellulose and unstable fine element in degrading straw skin；It chooses anti-
Hay animal rumens fungi Neocallimastix frontalis and producing and ethanol bacterium Candida tropicalis is co-cultured；Degradation
Unstable cellulose and hemicellulose in maize straw skin；Co-cultivation microorganism after domestication and the straw skin for dispelling oxygen are existed
It ferments in a kind of continuous flow culture system, tunning is separated by continuous culture system membrane separation device, is not generated
Antagonism, fermentation time are 36 hours, complete the pretreatment of maize straw skin；It can separation and fermentation production in situ by regulation
Object, realization maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic, the lignocellulosic after anaerobic fermentation,
Enter the continuously cooking system of anoxybiotic under totally-enclosed environment oxygen free condition, the auxiliary agent that boiling delignification uses, which is similarly, dispels
Oxygen solution, separates cellulose and continuously cooking raffinate body under the conditions of hermetically sealed, and cellulose enters the lower anaerobic of closing together
Desanding workshop section, subsequently enters beating equipment, controls cellulosic degree of polymerization by mashing, and boiling raffinate body is under anoxybiotic environment, and 100
DEG C by ceramic membrane be concentrated, concentrate be used for subsequent industrial utilization；The dyeing of continuous boiling removing lignin and cellulose is equal
It is to be carried out under anoxybiotic environment；COD value 120 reduces corn stover tradition slurrying pollution, fiber cellulose content≤93%；It isolates
Part corn stalk fiber cellulose fiber keep primary colors in the case of enter next process dye workshop section；The corn stalk of primary colors dyeing
Stalk fiber pulp is centrifuged in anoxybiotic, and the direct dissolving spinning preparation of dissolution slurry process is entered when containing 20% moisture
Viscose rayon, dry Duan split Qiang Du≤2.6cN/dtex, and dry Duan splits Shen Chang Shuai≤16.5%. Shi Duan and splits Qiang Du≤1.5cN/dtex, return
Damp rate reaches 16% or more.
Embodiment 3
Using carry out corn stover stalks of rice, wheat, etc. leaf and skin separation after maize straw skin as raw material, choose ruminant tumor gastric fungi
Neocallimastix frontalis and lactic acid producing bacteria Pediococcus acidilactic is co-cultured；Degrading maize straw
Unstable cellulose and hemicellulose in stalk skin, generating portion monomer and highly crystalline lignocellulosic；By the co-cultivation after domestication
Microorganism and the straw skin for dispelling oxygen ferment in a kind of continuous flow culture system, and tunning is by continuously cultivating
The separation of system membrane separation device does not generate antagonism, and fermentation time is 12 hours, completes the pretreatment of maize straw skin.It is logical
Cross regulation can separation and fermentation product in situ, realize maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic,
Lignocellulosic after anaerobic fermentation enters the continuously cooking system of anoxybiotic, the de- wood of boiling under totally-enclosed environment oxygen free condition
The auxiliary agent that quality uses, which is similarly, dispels oxygen solution, and cellulose and continuously cooking raffinate body are separated under the conditions of hermetically sealed, fine
Dimension element enters the lower desanding workshop section for closing anaerobic together, subsequently enters beating equipment, controls cellulosic degree of polymerization by mashing, steams
Raffinate body is boiled under anoxybiotic environment by 110 DEG C of ceramic membrane concentrations, concentrate is used for subsequent industrial utilization, and COD value 160 is reduced
Corn stover tradition slurrying pollution, fiber cellulose content≤95%；The bleaching of continuous boiling removing lignin and cellulose be
It is carried out under anoxybiotic environment, cellulose pulp directly dissolves spinning into dissolution slurry process when containing 25% moisture after centrifugation
Silk, dry Duan split Qiang Du≤2.7cN/dtex, and dry Duan splits the Shi of Shen Chang Shuai≤17%. Duan and splits Qiang Du≤1.6cN/dtex, and regain reaches
18%。
Embodiment 4
Using carry out corn stover stalks of rice, wheat, etc. leaf and skin separation after maize straw skin as raw material, choose ruminant tumor gastric fungi
Neocallimastix frontalis and production butanol bacterium Clostridium acetobutylicum are co-cultured；Degrading maize straw
Unstable cellulose and hemicellulose in stalk skin, generating portion monomer and highly crystalline lignocellulosic；By the co-cultivation after domestication
Microorganism and the straw skin for dispelling oxygen ferment in a kind of continuous flow culture system, and tunning is by continuously cultivating
The separation of system membrane separation device does not generate antagonism, and fermentation time is 40 hours, completes the pretreatment of maize straw skin.It is logical
Cross regulation can separation and fermentation product in situ, realize maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic,
Lignocellulosic after anaerobic fermentation enters the continuously cooking system of anoxybiotic, the de- wood of boiling under totally-enclosed environment oxygen free condition
The auxiliary agent that quality uses, which is similarly, dispels oxygen solution, and cellulose and continuously cooking raffinate body are separated under the conditions of hermetically sealed, fine
Dimension element enters the lower desanding workshop section for closing anaerobic together, subsequently enters beating equipment, controls cellulosic degree of polymerization by mashing, steams
It boils raffinate body to be concentrated by ceramic membrane for 120 DEG C under anoxybiotic environment, concentrate is used for subsequent industrial utilization；COD value 200 is reduced
Corn stover tradition slurrying pollution, fiber cellulose content≤93.5%；Continuously boiling, which removes the bleaching of lignin and cellulose, is
It carrying out under anoxybiotic environment, melt spinning prepares viscose rayon under drying regime, and dry Duan splits Qiang Du≤2.65cN/dtex,
Dry Duan splits the Shi of Shen Chang Shuai≤17%. Duan and splits Qiang Du≤1.7cN/dtex, 16% or more regain.
Claims (7)
1. a kind of method that microbial co culture pretreatment corn stover prepares viscose rayon, is substrate with corn stover, passes through
Continuous anaerobic fermentation equipment pre-processes corn stover by microbial co culture, and then realizes slurrying and prepare viscose rayon,
Be characterized in that: microbial co culture includes: that the Rumen Fungi isolated from ruminant bovine rumen and rumen bacteria co-culture,
Or ruminant tumor gastric fungi and producing and ethanol bacterium co-culture or ruminant tumor gastric fungi co-cultures with butanol bacterium is produced, or ruminates
Animal rumens fungi and lactic acid producing bacteria co-culture or ruminant tumor gastric fungi co-cultures with butyric is produced；Pass through microorganism
It co-cultures, unstable cellulose and hemicellulose in degrading maize straws, generating portion monomer and highly crystalline lignocellulosic lead to
Regulation is crossed, separation and fermentation product in situ realizes maize straw skin Biological Pretreatment, remaining highly crystalline lignocellulosic, exhausted
The dyeing or bleaching of continuous boiling removing lignin and cellulose are carried out under oxygen environment, cellulose pulp is containing certain after centrifugation
The dissolving spinning of viscose rayon is directly carried out in the case of moisture；Cellulose and continuously cooking raffinate are separated under the conditions of hermetically sealed
Body, ɑ content of cellulose 91% ~ 99.3%, cellulose enter the lower desanding workshop section for closing anoxybiotic together, subsequently enter totally-enclosed anoxybiotic
Beating equipment controls cellulosic degree of polymerization by mashing, and boiling raffinate body passes through ceramic membrane under 90 DEG C ~ 120 DEG C, anoxybiotic environment
Concentration.
2. the method that microbial co culture pretreatment corn stover prepares viscose rayon according to claim 1, feature
Be: corn stover is cut into the piece of 30mm ~ 40mm by the maize straw skin that stalks of rice, wheat, etc. leaf and skin seperator separate, and Separation by vibration is wooden
After the higher stalk knot of cellulose content, 3 ~ 10 mm granules are ground into, stalk is impregnated with not oxygenous water and dispels intracellular oxygen, supply
Subsequent microbial fermentation, uses as substrate.
3. the method that microbial co culture pretreatment corn stover prepares viscose rayon according to claim 1, feature
It is: the co-cultivation microorganism after domestication and the straw skin for dispelling oxygen is sent out in a kind of continuous flow culture system
Ferment, tunning do not generate antagonism, realize symbiosis by continuous culture system and by membrane separation device separation in situ,
Fermentation time is 12 ~ 48 hours, completes the pretreatment of maize straw skin.
4. the method that microbial co culture pretreatment corn stover prepares viscose rayon according to claim 1, feature
Be: the lignocellulosic after anaerobic fermentation enters the continuously cooking system of anoxybiotic under totally-enclosed environment oxygen free condition, steams
It boils the medicament that delignification uses and is similarly and dispel oxygen solution.
5. the method that microbial co culture pretreatment corn stover prepares viscose rayon according to claim 1, feature
Be: the part corn stalk fiber cellulose fiber isolated keeps entering next process dyeing workshop section or not in the case of primary colors
The part corn stalk fiber cellulose fiber for dyeing or isolating is bleached in anoxybiotic.
6. the method that microbial co culture pretreatment corn stover according to claim 5 prepares viscose rayon, feature
Be: the corn stalk fiber pulp of primary colors dyeing is centrifuged in anoxybiotic, is entered when containing 10% ~ 30% moisture molten
Solve the direct dissolving spinning of slurry process.
7. the method that microbial co culture pretreatment corn stover according to claim 5 prepares viscose rayon, feature
Be: bleaching corn stalk fiber pulp is centrifuged in anoxybiotic, and dissolving pulp work is entered when containing 10% ~ 30% moisture
The direct dissolving spinning of sequence prepares viscose rayon.
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| CN201610684324.0A CN106087089B (en) | 2016-08-18 | 2016-08-18 | A kind of system that microbial co culture pretreatment corn stover prepares viscose rayon |
| PCT/CN2017/098071 WO2018033146A1 (en) | 2016-08-18 | 2017-08-18 | System for preparing biomass monomer by means of microbial coculture |
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| WO2018033146A1 (en) * | 2016-08-18 | 2018-02-22 | 侯哲生 | System for preparing biomass monomer by means of microbial coculture |
| CN107326060B (en) * | 2017-04-06 | 2019-06-11 | 甘肃省科学院生物研究所 | A kind of method of anaerobic fermentation corn stover production acetic acid |
| CN107815752A (en) * | 2017-10-23 | 2018-03-20 | 李庆园 | High-elastic imitative hair composite fibre and preparation method thereof |
| CN107881611A (en) * | 2017-10-23 | 2018-04-06 | 李庆园 | Far infrared imitates hair composite fibre and preparation method thereof |
| CN107815753A (en) * | 2017-10-23 | 2018-03-20 | 李庆园 | Antistatic imitative hair composite fibre and preparation method thereof |
| CN112411234A (en) * | 2020-11-16 | 2021-02-26 | 黑龙江进化树生物科技有限公司 | Biological pollution-free pulping method of corn straws |
| CN112458030A (en) * | 2020-12-22 | 2021-03-09 | 广东溢多利生物科技股份有限公司 | Preparation method of clostridium butyricum preparation special for ruminants |
| CN114467772B (en) * | 2022-04-14 | 2022-08-19 | 中国科学院过程工程研究所 | Preparation process and preparation system of plant fiber cat litter |
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