CN108440038A - A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production - Google Patents
A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production Download PDFInfo
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- CN108440038A CN108440038A CN201810665764.0A CN201810665764A CN108440038A CN 108440038 A CN108440038 A CN 108440038A CN 201810665764 A CN201810665764 A CN 201810665764A CN 108440038 A CN108440038 A CN 108440038A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Soil Sciences (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of preparation methods for the composite fertilizer for making tealeaves increasing of quality and production, include the following steps：Wormcast, Pond Silt, peanut shell powder, radish grinding are uniformly obtained into premix；Bentonite, phenolic resin charing microballoon, calcined kaolin, talcum powder are added into premix to be uniformly mixed, urea, calcium superphosphate, monoammonium phosphate, plant ash, complex microorganism is added to stir evenly, it is 20 30wt% to add water to water content, heap fermentation 25 days carries out coating using polyacrylic acid coating agent and obtains the composite fertilizer for making tealeaves increasing of quality and production.Phenolic resin is carbonized microballoon and is prepared using following technique：By mineral oil, emulsifier for mixing at continuous phase solution, pretreatment carragheen is added dropwise thereto, collects the drop of generation, it is dry, it is put into the tube furnace calcining of nitrogen protection, it is cooling to obtain phenolic resin charing microballoon.
Description
Technical field
The present invention relates to tea tree planting technical field more particularly to a kind of preparation sides for the composite fertilizer for making tealeaves increasing of quality and production
Method.
Background technology
Tealeaves is the most common type drink in people's life, not with the development of social economy and people's living standard
Disconnected to improve, type effect of tealeaves is more and more, and people are increasingly strong to the diversification of tealeaves, health care and non-harmful requirement
Strong, in particular, people pay attention to the safety standard of tealeaves increasingly, the tealeaves of fine quality will be on the market without not basing oneself upon it
Ground.Chemical fertilizer is generally applied during tea tree planting at present, easily causes soil hardening, tea quality is poor, low output.
Invention content
Technical problems based on background technology, the present invention propose a kind of system for the composite fertilizer making tealeaves increasing of quality and production
Preparation Method, gained Fertilizer nutrient is balanced, can be effectively improved soil texture, keep hardened soil loose, is given birth to for tea root
Long development creates good moisture, ventilation, temperature condition, has important work to promoting root growth strong sprout, activating soil, increasing of quality and production
With.
A kind of preparation method of composite fertilizer for making tealeaves increasing of quality and production proposed by the present invention, includes the following steps：
S1,15-24 parts of wormcasts, 10-18 parts of Pond Silts, 2-10 parts of peanut shell powders, 4-8 parts of radishs are ground uniformly
Obtain premix；
S2,1-5 parts of bentonites, 1-3 parts of phenolic resin charing microballoons, 2-6 parts of calcined kaolins, 1- are added into premix
2 parts of talcum powder are uniformly mixed, and 45-55 parts of urea, 23-43 parts of calcium superphosphate, 5-15 parts of monoammonium phosphate, 10-20 portions of vegetations are added
Ash, 0.01-0.05 parts of complex microorganisms stir evenly, and it is 20-30wt%, heap fermentation 2-5 days, using 1- to add water to water content
4 parts of polyacrylic acid coating agents carry out coating and obtain the composite fertilizer for making tealeaves increasing of quality and production.
Preferably, in S2, complex microorganism include bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould,
At least two in metalloproteinases, phytase.
Preferably, in S2, complex microorganism include bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould,
Metalloproteinases, phytase；
Preferably, in S2, bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytic acid
The weight ratio of enzyme is 1-4：2-5：1-4：1-4：2-5：1-4.
Preferably, in S2, phenolic resin is carbonized microballoon and is prepared using following technique：By weight by 200-280 parts of mines
Object oil, 0.5-1.4 parts of emulsifier for mixing are added dropwise 40-50 parts of pretreatment carragheens, collect generation thereto at continuous phase solution
Drop, it is dry, it is put into the tube furnace calcining of nitrogen protection, it is cooling to obtain phenolic resin charing microballoon.
Preferably, in the phenolic resin of S2 carbonizes method for preparing microsphere, calcination time 10-20min, calcination temperature is
850-900℃。
Preferably, in S2, the raw material for pre-processing carragheen includes carragheen, absolute ethyl alcohol, hydrogen peroxide solution, phenolic aldehyde tree
Fat.
Preferably, in S2, a concentration of 15-22wt% of hydrogen peroxide solution；Carragheen, absolute ethyl alcohol, hydrogen peroxide solution,
The weight ratio of phenolic resin is 4-12：40-50：2-5：40-60.
Preferably, it in S2, pre-processes in carragheen, by carragheen, absolute ethyl alcohol and stirring, whipping temp is 80-90 DEG C,
Hydrogen peroxide solution stirring is added, removes absolute ethyl alcohol, the phenolic resin that viscosity is 35-42mp.s is added and stirs evenly, stirring temperature
Degree is 85-92 DEG C.
Gained fertilizer of the invention can be effectively improved soil texture, keep hardened soil loose, grown for tea root
Development creates good moisture, ventilation, temperature condition, plays an important roll to promoting root growth strong sprout, activating soil, increasing of quality and production,
Nutrient needed for providing can be also provided according to tea growth, persistently meet need of the tea growth development later stage to nutriment
It wants, and slowly enduringly releases nutrient in combination with the growth characteristics and regulation of fertilizer requirement of tealeaves, be conducive to tealeaves life
It is long, improve tea leaf quality, increases the content of material beneficial to human body in tealeaves.
In the phenolic resin charing microballoon of the present invention, carragheen is dissolved in absolute ethyl alcohol, by dioxygen water process, is generated
A large amount of big molecule side chains form height space network structure, compound to form height inierpeneirating network structure with phenolic resin, in mineral
Microballoon is formed in oil and after high-temperature calcination, specific surface area is very big, and adsorption activity is high；And wormcast, Pond Silt, peanut shell
Powder, radish match, and after compound microorganism ferments, can not only enhance tea soil fertility, stimulate plant growth, and
Tea tree disease resistance can be effectively improved；Phenolic resin charing microballoon is dispersed in inside particle, and adsorption activity is high, polyacrylic acid coating
Agent is coated on extra-granular, and particle is non-breakable, and water conservation permeability is good, and phenolic resin carbonizes microballoon, polyacrylic acid coating agent
Compounding, it is notable to the slow release effect of nutriment, and also the rate of release of nutrient is coincide with tea tree regulation of fertilizer requirement, improves fertilizer profit
With rate, while tea tree overgrowing is can avoid, then colloid is cooperatively formed with humus, keeps Zinc fractions crumb structure, soil more defeated
It send, good permeability, the slow releasing function of nutriment further enhances, and single-dose application can both meet tea tree growth in whole year demand.
Specific implementation mode
In the following, technical scheme of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production, includes the following steps：
S1,15kg wormcasts, 18kg Pond Silts, 2kg peanut shell powders, the grinding of 8kg radishs are uniformly obtained into premix；
S2,1kg bentonites, 3kg phenolic resin charing microballoon, 2kg calcined kaolins, 2kg talcums are added into premix
Powder is uniformly mixed, and 45kg urea, 43kg calcium superphosphate, 5kg monoammonium phosphate, 20kg plant ash, 0.01kg complex microorganisms is added
It stirs evenly, it is 30wt% to add water to water content, and heap fermentation 2 days, carrying out coating using 4kg polyacrylic acid coating agents is made
The composite fertilizer of tealeaves increasing of quality and production.
Complex microorganism is by bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase
It is 1 by weight：5：1：4：2：4 compositions.
Phenolic resin is carbonized microballoon and is prepared using following technique：
By 12kg carragheens, 40kg absolute ethyl alcohol and stirring 12min, whipping temp is 80 DEG C, and a concentration of 15wt% of 5kg are added
Hydrogen peroxide solution stirs 50min, removes absolute ethyl alcohol, and the phenolic resin that 40kg viscosity is 42mp.s is added and stirs evenly, stirs
Temperature is 85 DEG C, obtains premix；
By 280kg mineral oil, 0.5kg emulsifier for mixing at continuous phase solution, 50kg premixes are added dropwise thereto, collect life
At drop, 70 DEG C of dryings are put into the tube furnace of nitrogen protection, and 850 DEG C are warming up to from room temperature with the speed of 2.5 DEG C/min,
20min is calcined, it is cooling to obtain phenolic resin charing microballoon.
Embodiment 2
A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production, includes the following steps：
S1,15kg wormcasts, 18kg Pond Silts, 2kg peanut shell powders, the grinding of 8kg radishs are uniformly obtained into premix；
S2,1kg bentonites, 3kg phenolic resin charing microballoon, 2kg calcined kaolins, 2kg talcums are added into premix
Powder is uniformly mixed, and 45kg urea, 43kg calcium superphosphate, 5kg monoammonium phosphate, 20kg plant ash, 0.01kg complex microorganisms is added
It stirs evenly, it is 30wt% to add water to water content, and heap fermentation 2 days, carrying out coating using 4kg polyacrylic acid coating agents is made
The composite fertilizer of tealeaves increasing of quality and production.
Complex microorganism is by bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase
It is 1 by weight：5：1：4：2：4 compositions.
Phenolic resin is carbonized microballoon and is prepared using following technique：
By 4kg carragheens, 50kg absolute ethyl alcohol and stirring 5min, whipping temp is 90 DEG C, and it is bis- that a concentration of 22wt% of 2kg are added
Oxygen aqueous solution stirs 20min, removes absolute ethyl alcohol, and the phenolic resin that 60kg viscosity is 35mp.s is added and stirs evenly, stirring temperature
Degree is 92 DEG C, obtains premix；
By 200kg mineral oil, 1.4kg emulsifier for mixing at continuous phase solution, 40kg premixes are added dropwise thereto, collect life
At drop, 80 DEG C of dryings are put into the tube furnace of nitrogen protection, and 900 DEG C are warming up to from room temperature with the speed of 1.5 DEG C/min,
10min is calcined, it is cooling to obtain phenolic resin charing microballoon.
Embodiment 3
A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production, includes the following steps：
S1,18kg wormcasts, 16kg Pond Silts, 4kg peanut shell powders, the grinding of 7kg radishs are uniformly obtained into premix；
S2,2kg bentonites, 2.5kg phenolic resin charing microballoon, 3kg calcined kaolins, 1.8kg are added into premix
Talcum powder is uniformly mixed, and it is compound micro- that 48kg urea, 36kg calcium superphosphate, 8kg monoammonium phosphate, 18kg plant ash, 0.02kg is added
Biological stirring is uniform, and it is 28wt% to add water to water content, and heap fermentation 3 days carries out coating using 3kg polyacrylic acid coating agents and obtains
To the composite fertilizer for making tealeaves increasing of quality and production.
Complex microorganism is by bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase
It is 2 by weight：4：2：3：3：3 compositions.
Phenolic resin is carbonized microballoon and is prepared using following technique：
By 6kg carragheens, 47kg absolute ethyl alcohol and stirring 8min, whipping temp is 88 DEG C, and it is bis- that a concentration of 20wt% of 3kg are added
Oxygen aqueous solution stirs 30min, removes absolute ethyl alcohol, and the phenolic resin that 55kg viscosity is 36mp.s is added and stirs evenly, stirring temperature
Degree is 90 DEG C, obtains premix；
By 220kg mineral oil, 1.2kg emulsifier for mixing at continuous phase solution, 43kg premixes are added dropwise thereto, collect life
At drop, 77 DEG C of dryings are put into the tube furnace of nitrogen protection, and 880 DEG C are warming up to from room temperature with the speed of 1.8 DEG C/min,
12min is calcined, it is cooling to obtain phenolic resin charing microballoon.
Embodiment 4
A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production, includes the following steps：
S1,22kg wormcasts, 12kg Pond Silts, 8kg peanut shell powders, the grinding of 5kg radishs are uniformly obtained into premix；
S2,4kg bentonites, 1.5kg phenolic resin charing microballoon, 5kg calcined kaolins, 1.2kg are added into premix
Talcum powder is uniformly mixed, and it is compound micro- that 52kg urea, 30kg calcium superphosphate, 12kg monoammonium phosphate, 12kg plant ash, 0.04kg is added
Biological stirring is uniform, and it is 22wt% to add water to water content, and heap fermentation 4 days carries out coating using 2kg polyacrylic acid coating agents and obtains
To the composite fertilizer for making tealeaves increasing of quality and production.
Complex microorganism is by bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase
It is 3 by weight：3：3：2：4：2 compositions.
Phenolic resin is carbonized microballoon and is prepared using following technique：
By 10kg carragheens, 43kg absolute ethyl alcohol and stirring 10min, whipping temp is 82 DEG C, and a concentration of 16wt% of 4kg are added
Hydrogen peroxide solution stirs 40min, removes absolute ethyl alcohol, and the phenolic resin that 45kg viscosity is 40mp.s is added and stirs evenly, stirs
Temperature is 86 DEG C, obtains premix；
By 260kg mineral oil, 0.8kg emulsifier for mixing at continuous phase solution, 47kg premixes are added dropwise thereto, collect life
At drop, 73 DEG C of dryings are put into the tube furnace of nitrogen protection, and 860 DEG C are warming up to from room temperature with the speed of 2.2 DEG C/min,
18min is calcined, it is cooling to obtain phenolic resin charing microballoon.
Embodiment 5
A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production, includes the following steps：
S1,20kg wormcasts, 14kg Pond Silts, 6kg peanut shell powders, the grinding of 6kg radishs are uniformly obtained into premix；
S2,3kg bentonites, 2kg phenolic resin charing microballoon, 4kg calcined kaolins, 1.5kg cunnings are added into premix
Mountain flour is uniformly mixed, and 50kg urea, 33kg calcium superphosphate, 10kg monoammonium phosphate, 15kg plant ash, 0.03kg composite microbials is added
Object stirs evenly, and it is 25wt% to add water to water content, and heap fermentation 3.5 days carries out coating using 2.5kg polyacrylic acid coating agents
Obtain the composite fertilizer for making tealeaves increasing of quality and production.
Complex microorganism is by bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase
It is 2.5 by weight：3.5：2.5：2.5：3.5：2.5 composition.
Phenolic resin is carbonized microballoon and is prepared using following technique：
By 8kg carragheens, 45kg absolute ethyl alcohol and stirring 9min, whipping temp is 85 DEG C, and a concentration of 18wt% of 3.5kg are added
Hydrogen peroxide solution stirs 35min, removes absolute ethyl alcohol, and the phenolic resin that 50kg viscosity is 38mp.s is added and stirs evenly, stirs
Temperature is 88 DEG C, obtains premix；
By 240kg mineral oil, 1kg emulsifier for mixing at continuous phase solution, 45kg premixes are added dropwise thereto, collects and generates
Drop, 75 DEG C of dryings are put into the tube furnace of nitrogen protection, are warming up to 870 DEG C from room temperature with the speed of 2 DEG C/min, calcining
15min, it is cooling to obtain phenolic resin charing microballoon.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production, which is characterized in that include the following steps：
S1,15-24 parts of wormcasts, 10-18 parts of Pond Silts, 2-10 parts of peanut shell powders, 4-8 parts of radish grindings are uniformly obtained
Premix；
S2,1-5 part bentonites are added into premix, 1-3 parts of phenolic resin carbonize microballoons, 2-6 parts of calcined kaolins, 1-2 parts
Talcum powder be uniformly mixed, be added 45-55 parts of urea, 23-43 parts of calcium superphosphate, 5-15 parts of monoammonium phosphate, 10-20 parts of plant ash,
0.01-0.05 parts of complex microorganisms stir evenly, and it is 20-30wt%, heap fermentation 2-5 days, using 1-4 parts to add water to water content
Polyacrylic acid coating agent carries out coating and obtains the composite fertilizer for making tealeaves increasing of quality and production.
2. the preparation method of the composite fertilizer according to claim 1 for making tealeaves increasing of quality and production, which is characterized in that in S2,
Complex microorganism include in bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase at least
Two kinds.
3. the preparation method of the composite fertilizer according to claim 2 for making tealeaves increasing of quality and production, which is characterized in that in S2,
Complex microorganism includes bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase.
4. the preparation method of the composite fertilizer according to claim 3 for making tealeaves increasing of quality and production, which is characterized in that in S2,
Bacillus licheniformis, saccharomycete, streptomyces griseus, black-koji mould, metalloproteinases, phytase weight ratio be 1-4：2-5：1-
4：1-4：2-5：1-4.
5. making the preparation method of the composite fertilizer of tealeaves increasing of quality and production according to claim 1-4 any one of them, which is characterized in that
In S2, phenolic resin is carbonized microballoon and is prepared using following technique：By weight by 200-280 parts of mineral oil, 0.5-1.4 parts of breasts
Agent stirs into continuous phase solution, and 40-50 parts of pretreatment carragheens are added dropwise thereto, collect the drop of generation, dry, is put into nitrogen
The tube furnace of gas shielded is calcined, cooling to obtain phenolic resin charing microballoon.
6. the preparation method of the composite fertilizer according to claim 5 for making tealeaves increasing of quality and production, which is characterized in that in S2,
The raw material for pre-processing carragheen includes carragheen, absolute ethyl alcohol, hydrogen peroxide solution, phenolic resin.
7. the preparation method of the composite fertilizer according to claim 5 for making tealeaves increasing of quality and production, which is characterized in that in S2,
A concentration of 15-22wt% of hydrogen peroxide solution；Carragheen, absolute ethyl alcohol, hydrogen peroxide solution, phenolic resin weight ratio be 4-
12：40-50：2-5：40-60.
8. the preparation method of the composite fertilizer according to claim 5 for making tealeaves increasing of quality and production, which is characterized in that in S2,
It pre-processes in carragheen, by carragheen, absolute ethyl alcohol and stirring, whipping temp is 80-90 DEG C, and hydrogen peroxide solution stirring is added, goes
Except absolute ethyl alcohol, the phenolic resin that viscosity is 35-42mp.s is added and stirs evenly, whipping temp is 85-92 DEG C.
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| CN201810665764.0A CN108440038A (en) | 2018-06-26 | 2018-06-26 | A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production |
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| CN201810665764.0A CN108440038A (en) | 2018-06-26 | 2018-06-26 | A kind of preparation method for the composite fertilizer for making tealeaves increasing of quality and production |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2090752A5 (en) * | 1970-04-27 | 1972-01-14 | Armour Hess Chemicals | |
| CN106008006A (en) * | 2016-05-31 | 2016-10-12 | 杜兆龙 | Slow-release and long-acting composite fertilizer and preparation method thereof |
| CN106824079A (en) * | 2017-03-01 | 2017-06-13 | 东北大学秦皇岛分校 | A kind of method for preparing carbon microspheres as raw material with waste and old phenol formaldehyde foam |
-
2018
- 2018-06-26 CN CN201810665764.0A patent/CN108440038A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2090752A5 (en) * | 1970-04-27 | 1972-01-14 | Armour Hess Chemicals | |
| CN106008006A (en) * | 2016-05-31 | 2016-10-12 | 杜兆龙 | Slow-release and long-acting composite fertilizer and preparation method thereof |
| CN106824079A (en) * | 2017-03-01 | 2017-06-13 | 东北大学秦皇岛分校 | A kind of method for preparing carbon microspheres as raw material with waste and old phenol formaldehyde foam |
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