CN101215429A - Technique for preparing micro-nano reduction dyestuff - Google Patents
Technique for preparing micro-nano reduction dyestuff Download PDFInfo
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- CN101215429A CN101215429A CNA2008100193634A CN200810019363A CN101215429A CN 101215429 A CN101215429 A CN 101215429A CN A2008100193634 A CNA2008100193634 A CN A2008100193634A CN 200810019363 A CN200810019363 A CN 200810019363A CN 101215429 A CN101215429 A CN 101215429A
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Abstract
A preparation technology of a micro-nanometer vat dye is characterized in that a process comprises first, adding vat dyes, dispersing agent and water in a ball grinder, ball-grinding and mixing to form slurry material and pre-dispersing, second, impacting and grinding the fluid energy of the mixture which is got through the upper step through a pin-rod-type grinder, third, adding defoaming agent in the mixture which is grinded, grinding in an ultra-fine state in a bidirectional rotating ball grinder, finally, handling the mixture which is got from the upper step in homogenization through adopting the pin-rod-type grinder or a high-pressure homogenizer. The technical process which is adopted by the new technique is that different equipment and technical processes are chosen to effectively grind to reach a best effect of grinding according to the particle distribution and physical characteristics of pulp-shaped material in different stages, and a technical cycle period is between 12 hours to 48 hours. The traditional technique utilizes unchangeable apparatuses and technique to grind various dyes with different structures and performances, and the new technique utilizes various changeable and adjustable apparatuses and technique to find a best grinding process aiming at various dyes with different structures and performances.
Description
One, technical field
The invention belongs to the dyestuff processing technique field, particularly a kind of preparation technology of micro-nano reduction dyestuff.
Two, background technology
Prior art: the technology of superfine grinding mainly is divided into (1) abrasive micro-powder production technique.The raw material mineral that can be used for processing micron power mainly contain silicon carbide, white fused alumina, brown corundum and garnet etc.The development that becomes more meticulous along with the every profession and trade processing technology and the adjustment of International Industrial Structure, the micron power consumption that is widely used in polishing industry is increasing, and export volume also increases year by year, and the retrofit of micron power has vast potential for future development.The abrasive material machining characteristics is that material is hard, equipment attrition big, Unusually narrow particle size distribution.For preventing that polished workpiece surface is scratched, should strictly control oarse-grained existence in the finished product.(2) wet classification technology.Ball mill grinding and wet classification technology are mainly adopted in traditional micron power production.This process characteristic is that investment is little, and technical process is simple.The general mode that adopts batch grinding of crushing process.Come control size and size-grade distribution with the method in period.The fractionated method has swirler mode, over flow rinse method and settling process.Bigger particulate settling velocity is bigger, and the method for over flow rinse is adopted in classification more.For more tiny particle, settling velocity is lower, and the mode of large container free setting is adopted in classification more.Need in this technological process particle is carried out good dispersion treatment, could guarantee its precision.The production efficiency of this way is low, throughput is difficult to enlarge, big, the consuming time water consumption of floor space is serious.Yet because wet classification can add dispersion agent in water, the dispersive ability of liquid-solid interface is stronger than the dispersive ability of gas-solid interface, and the grading effect of wet classification generally is better than dry classification.(3) dry classification technology.The dry classification system is made up of pulverizer and the grading machine more than 2, dust-precipitator and blower fan.The product of pulverizer enters the 1st grading machine and carries out stage treatment under the carrying under one's arms of air-flow, after the control certain upper limit grade, return pulverizer greater than the meal of this grade and pulverize once more; Tiny powder less than this grade enters the 2nd the lower limit grade that the grading machine stepped control is certain.Product 1 after treatment and product 2 are the abrasive material of narrow grade, and meticulous product 3 is collected by dust-precipitator.In such system, adjust the size-grade distribution of product after the size-grade distribution of grindability, product of pulverizer and the classification, the growing amount that reduces meticulous powder is very crucial, it has determined overall system efficiency.The characteristics of this technology are characteristics such as processing up-to-dateness height, treatment capacity are big, effectiveness of classification height, are suitable for dry method and produce micron power in enormous quantities.The shortcoming of this technology is under the too thin situation of product, because the dispersive ability of gas is limit the obvious variation of grading effect.
In the commercialization course of processing of vat dyes, it is one of important course of processing that wet method super-fine is pulverized.At present the super-refinement technology of vat dyes mainly is to pull an oar pre-dispersedly with methods such as pre-dispersed device of turbine type and sand milling pots, and the slurry after the dispersion advances sand mill again.The principle of work of sand mill is basic identical, because dispersible tablet (coiling) gets high speed rotating and produces centrifugal force, grinding medium and paste dye mix, grinding medium and dyestuff rush at the inwall of mill tube under action of centrifugal force, medium produces intensive shearing, friction, impact and squeeze to dye granule, and material is subjected to acting on the back and is pulverized.The superfine grinding time is long, the energy consumption height, and crush efficiency is low.The technology that present domestic vat dyes aftertreatment crushing process generally adopts be pasty material pre-dispersed～sand milling pot～sand mill～clarifixator technical process, a technological cycle cycle is 48 hours～148 hours.
Three, summary of the invention
Technical problem: the preparation technology who the invention provides a kind of micro-nano reduction dyestuff.Adopt this technical scheme, can shorten the pulverizing time of vat dyes, reduce and pulverize energy consumption, cut down finished cost.
Technical scheme: a kind of preparation technology of micro-nano reduction dyestuff may further comprise the steps:
A. vat dyes, dispersion agent and water are added in the ball mill, carry out ball milling and be mixed into pasty material and pre-dispersed;
B. with the pin bar disintegrator gained mixture of last step is flowed the energy impact grinding;
C. the mixture after pulverizing adds defoamer, carries out superfine grinding in two-way screw grinding machine;
D. adopt pin bar disintegrator or high pressure homogenizer to the processing that homogenizes of gained mixture of last step.
Vat dyes is that former dyestuff in the dyestuff manufacturing processed is through filter cake after pressure filtration or filter cake dry product after drying.Dispersion agent is methanonaphthalene sodium sulfonate class dispersion agent or lignosulfonic acid salt dispersion agent.The mass ratio of vat dyes and dispersion agent is 1: (0.5～4), the mixture solid content that adds behind the water reaches 20～55%.Ball mill described in the step a is unidirectional screw grinding machine or two-way screw grinding machine, grinding medium in the ball mill is ceramic bead, granulated glass sphere, zirconium oxide bead, quartz sand or the pebbles of 5～50 millimeters of diameters, mixing the pre-dispersed time is 20 minutes～20 hours, grinding temperature is 5-70 ℃, pellet mass ratio=1: (2～6), packing factor: 40-80%.Defoamer is silicone based defoamer, alcohol defoaming agent and phosphoric acid ester defoamer.Grinding medium described in the step c in the two-way screw grinding machine is ceramic bead, granulated glass sphere, zirconium oxide bead or the quartz sand of 1～5 millimeter of diameter, and the time of superfine grinding is 1.5～48 hours.Step c and steps d can be exchanged.Methanonaphthalene sodium sulfonate class dispersion agent is Dispersant MF, dispersing agent C NF or dispersing agent C S; Described lignosulfonic acid salt dispersion agent is synthetic lignosulfonate MS, modified lignin resin sodium sulfonate, dispersion agent M9, dispersion agent M10, dispersion agent M13 or dispersion agent M15 (" Chinese Chemicals complete works (third edition) ", Chemical Industry Press, the 611st～615 page, in January, 2005).Silicone based defoamer is defoamer S2100, and the phosphoric acid ester defoamer is a tri-n-butyl, and alcohol defoaming agent is an ethanol.
Beneficial effect:
1, according to the physicals of different dyes, adjust drum's speed of rotation, material ball ratio, make the mixing of dyestuff, dispersion agent, water, pre-dispersed time shorten to 20 minutes～20 hours.
2, can pre-dispersed material macrobead ratio be descended impact grinding significantly by stream, reduce the superfine grinding time to improve crushing effect.
3, defoamer has solved in the process of lapping and has increased the problem that mill efficiency reduces because of foaming causes volume.
4, adopt two-way rotation ball grinding technique to make milling time shorten to 1.5～48 hours.
5, two-way screw is ground material through the processing that homogenizes, can guarantee stability of slurry, consistence and mixing uniformity.
6, solid content: 20～55%: when the pasty material solid content was lower than 20%, the efficient that causes except that single batch of output reduces along with the decline of solid content was low, because of solid content is low, pasty material can increase drying cost when carrying out drying.When the pasty material solid content greater than 55% the time, along with increasing of solid content, material viscosity increases its flowing property and descends, mill efficiency is low.Physicals according to different materials is selected solid content.
7, temperature: 5～70 degree: temperature is low excessively in the grinding technics, and viscosity is big, and the Flow of Goods and Materials performance is poor, and mill efficiency is low.When temperature was too high in the grinding technics, grinding material formed the self-solidifying coalescence and spumes easily under the high-temperature situation.
8, grinding medium material and specification:
The grinding medium of 5～50 millimeters of diameters among the a.A: when in the A operation, selecting diameter less than the pearl of 5mm, because the pearl monomer weight is easily low and material sticks together, be difficult for being mixed into mobile slurry, though significantly also do not reduce the input inventory greater than the better grinding effect of 50 millimeters pearl beating results.
The grinding medium of 1～5 millimeter of diameter among the b.B: when selecting diameter less than the pearl of 1mm in the B operation, mill efficiency low (medium and quality of material be than little, causes reducing because of the reactive force of generation just of collision mutually) milling time is long.Big greater than 5 millimeters pearls because of pearl and pearl space, be difficult for meeting the requirements of the dye granule fineness.
9, pellet mass ratio: at the pellet mass ratio less than 1: 2 o'clock: mill efficiency is low, and milling time is long, the energy consumption height.At the pellet mass ratio greater than 1: 6 o'clock: inventory is few, yields poorly.
10, packing factor (in which kind of sum that drops into material in the container and the container effective volume than): packing factor was less than 40% o'clock: it is poor to move uneconomical efficient.Packing factor was greater than 80% o'clock: machine utilization is big, and material effective exercise space in container is little.
11, pull an oar at a high speed mixings, the making beating of sand milling pot of the domestic pre-dispersed common use of dyestuff at present mixes and carries out in earlier stage pre-dispersed of dyestuff, and it respectively has relative merits, as the high speed hollander material virgin state is had certain requirement.And the pre-dispersed long defective of low time of efficient that exists of sand milling pot making beating.Above equipment mostly is vertical equipment, its shortcoming be grinding medium than great, usually only work in the middle and lower part, mill efficiency is low, coefficients such as filling are little.And ball mill is the sealed horizontal container, its packing factor is big, material ball ratio is big, material and grinding medium are with full and uniform contact of the simplified running of equipment, improve grinding effect, the pasty material of being carried in the scheme pre-dispersed in ball mill selected the go forward side by side trip temperature control of specific solid content and material ball ratio than traditional ball milled slurry material is pre-dispersed, played and have paste dye and will grind elimination invalid energy consumption in two-way mechanical milling process than the big dye particle pre-dispersed the time, further reduced the dyestuff energy consumption.On the basis of two-way ball milling, reach the energy-saving effect that gets twice the result with half the effort, the purpose that cuts down the consumption of energy.
12, the processing method of novel process employing is to select different equipment and processing method effectively to pulverize the best effect that reach pulverizing with physical property in different steps according to the size distribution of pasty material, and a technological cycle cycle was at 12 hours～48 hours.Traditional technology is to pulverize many kinds dyestuff of different structure, performance with constant device and technology, and novel process is to find best crushing process at many kinds dyestuff of different structure performance with changeable adjustable device and technology.
Four, description of drawings
Fig. 1 is the different material ball ratio particle diameters with traditional technology of Vat Brown BR novel process changing trend diagrams (D50=5 micron) in time, wherein as can be seen: when material ball ratio is 1: 4, need 2 hours approximately when D50 reaches 5 microns.And material ball ratio is that required time will be much larger than 2 hours when D50 reached 5 microns in 2: 1 o'clock, and visible material ball ratio influences mill efficiency.
Fig. 2 is the viscosity profile figure of reduced olive T pasty material when different solid content, and wherein as can be seen: the pasty material solid content is low, and its viscosity is low, and the Flow of Goods and Materials performance is good, the mill efficiency height.Along with the rising of pasty material solid content, viscosity raises, and material fluidity descends, and mill efficiency descends, but when surpassing certain solid content, its material can't flow.
Five, embodiment
The pellet mass ratio is: the ratio of the total mass of dyestuff and dispersion agent and grinding medium quality.
Packing factor: the ratio of contained material and container cumulative volume in the container.
D
50: the cumulative particle sizes percentile of a sample reaches 50% o'clock pairing particle diameter.To be particle diameter account for 50% greater than its particle to its physical significance, also accounts for 50%, D less than its particle
50Also be meso-position radius or median particle diameter.D
50Be commonly used to represent the mean particle size of powder.
D
90: the cumulative particle sizes distribution number of a sample reaches 90% o'clock pairing particle diameter.Its physical significance be particle diameter less than it particle account for 90%.
A kind of preparation technology of micro-nano reduction dyestuff may further comprise the steps:
A. vat dyes, dispersion agent and water are added in the unidirectional screw grinding machine, carry out ball milling and be mixed into pasty material and pre-dispersed;
B. with the pin bar disintegrator gained mixture of last step is flowed the energy impact grinding;
C. the mixture after pulverizing adds defoamer, carries out superfine grinding in two-way screw grinding machine;
D. adopt pin bar disintegrator or high pressure homogenizer to the processing that homogenizes of gained mixture of last step.
Vat dyes is that former dyestuff in the dyestuff manufacturing processed is through filter cake after pressure filtration or filter cake dry product after drying.Dispersion agent is a methanonaphthalene sodium sulfonate class dispersion agent: Dispersant MF, dispersing agent C NF or dispersing agent C S.The mass ratio of vat dyes and dispersion agent is 1: 0.5, and the mixture solid content that adds behind the water reaches 20%.Grinding medium described in the step a in the ball mill is ceramic bead, granulated glass sphere, zirconium oxide bead, quartz sand or the pebbles of 5 millimeters of diameters, and mixing the pre-dispersed time is 20 minutes, and grinding temperature is 5 ℃, pellet mass ratio=1: 2, packing factor: 40%.Defoamer is silicone based defoamer: defoamer S2100, content are 0.5 ‰.Grinding medium described in the step c in the two-way screw grinding machine is ceramic bead, granulated glass sphere, zirconium oxide bead or the quartz sand of 1 millimeter of diameter, and the time of superfine grinding is 1.5 hours.Step c and steps d can be exchanged.
A kind of preparation technology of micro-nano reduction dyestuff may further comprise the steps:
A. vat dyes, dispersion agent and water are added in the two-way screw grinding machine, carry out ball milling and be mixed into pasty material and pre-dispersed;
B. with the pin bar disintegrator gained mixture of last step is flowed the energy impact grinding;
C. the mixture after pulverizing adds defoamer, carries out superfine grinding in two-way screw grinding machine;
D. adopt pin bar disintegrator or high pressure homogenizer to the processing that homogenizes of gained mixture of last step.
Vat dyes is that former dyestuff in the dyestuff manufacturing processed is through filter cake after pressure filtration or filter cake dry product after drying.Dispersion agent is a lignosulfonic acid salt dispersion agent: synthetic lignosulfonate MS, modified lignin resin sodium sulfonate, dispersion agent M9, dispersion agent M10, dispersion agent M13 or dispersion agent M15.The mass ratio of vat dyes and dispersion agent is 1: 4, and the mixture solid content that adds behind the water reaches 55%.Grinding medium described in the step a in the ball mill is ceramic bead, granulated glass sphere, zirconium oxide bead, quartz sand or the pebbles of 50 millimeters of diameters, and mixing the pre-dispersed time is 20 hours, and grinding temperature is 70 ℃, pellet mass ratio=1: 6, packing factor: 80%.Defoamer is an alcohol defoaming agent: ethanol, add-on is: 2 ‰.Grinding medium described in the step c in the two-way screw grinding machine is ceramic bead, granulated glass sphere, zirconium oxide bead or the quartz sand of 5 millimeters of diameters, and the time of superfine grinding is 48 hours.Step c and steps d can be exchanged.
A kind of preparation technology of micro-nano reduction dyestuff may further comprise the steps:
A. vat dyes, dispersion agent and water are added in the unidirectional screw grinding machine, carry out ball milling and be mixed into pasty material and pre-dispersed;
B. with the pin bar disintegrator gained mixture of last step is flowed the energy impact grinding;
C. the mixture after pulverizing adds defoamer, carries out superfine grinding in two-way screw grinding machine;
D. adopt pin bar disintegrator or high pressure homogenizer to the processing that homogenizes of gained mixture of last step.
Vat dyes is that former dyestuff in the dyestuff manufacturing processed is through filter cake after pressure filtration or filter cake dry product after drying.Dispersion agent is a methanonaphthalene sodium sulfonate class dispersion agent: Dispersant MF, dispersing agent C NF or dispersing agent C S.The mass ratio of vat dyes and dispersion agent is 1: 3, and the mixture solid content that adds behind the water reaches 45%.Grinding medium described in the step a in the ball mill is ceramic bead, granulated glass sphere, zirconium oxide bead, quartz sand or the pebbles of 30 millimeters of diameters, and mixing the pre-dispersed time is 10 hours, and grinding temperature is 50 ℃, pellet mass ratio=1: 4, packing factor: 60%.Defoamer is the phosphoric acid ester defoamer: tri-n-butyl, add-on is: 1 ‰.Grinding medium described in the step c in the two-way screw grinding machine is ceramic bead, granulated glass sphere, zirconium oxide bead or the quartz sand of 3 millimeters of diameters, and the time of superfine grinding is 28 hours.Step c and steps d can be exchanged.
With 134 kilograms of reduced olive T filter cakes (solid content 35%), 84 kilograms of Dispersant MF (condensation compound of methyl naphthalene sulfonic acid and formaldehyde) aqueous solution (solid content 56%), water are put into unidirectional screw grinding machine for 17 kilograms, grinding medium is 30 millimeters of alumina-ceramic pearl diameters, carry out ball milling 1.5 hours, and obtained slurry.The gained slurry is flowed the energy impact grinding with the pin bar disintegrator to dyestuff, and input speed is 600 kilograms/hour, pulverizes twice.The slurry that flows after pulverizing is put into two-way screw grinding machine, add 200 gram defoamer S-2100 (modified polyorganosiloxane+silicone resin, solid content 10%), grinding medium is 1～1.5 millimeter of a granulated glass sphere diameter, ball milling 6.5 hours.Ball milling gained slurry homogenizes to dyestuff with the pin bar disintegrator, and input speed is 600 kilograms/hour, twice of homogeneous.Obtain dye solution at last.This dye solution particle diameter D after testing
50Be 0.20 μ m, D
90Be 0.50 μ m.
With 122.5 kilograms of Vat Brown BR filter cakes (solid content 34%), 99 kilograms of the Dispersant MF aqueous solution (solid content 41.6%), water are put into two-way screw grinding machine for 15 kilograms, grinding medium is 30 millimeters of alumina-ceramic spherical diameter, carries out ball milling 1.5 hours, obtains slurry.The gained slurry is flowed the energy impact grinding with the pin bar disintegrator to dyestuff, and input speed is 100 kilograms/hour, pulverizes once.The slurry that flows after pulverizing is put into two-way screw grinding machine, add 200 gram defoamer S-2100 (solid content 10%), grinding medium is 1～1.5 millimeter of a granulated glass sphere diameter, ball milling 6 hours.Ball milling gained slurry homogenizes to dyestuff with the pin bar disintegrator, and input speed is 100 kilograms/hour, and homogeneous once.Obtain dye solution at last.This dye solution particle diameter D after testing
50Be 0.21 μ m, D
90Be 0.49 μ m.
With 129 kilograms of reductive blue RSN filter cakes (solid content 28.55%), 88 kilograms of the Dispersant MF aqueous solution (solid content 41.6%), water are put into unidirectional screw grinding machine for 66 kilograms, grinding medium is 30 millimeters of alumina-ceramic spherical diameter, carries out ball milling 3 hours, obtains slurry.The gained slurry is flowed the energy impact grinding with the pin bar disintegrator to dyestuff, and input speed is 100 kilograms/hour, pulverizes once.The slurry that flows after pulverizing is put into two-way screw grinding machine, add 200 gram defoamer S-2100 (solid content 10%), grinding medium is 1～1.5 millimeter of a granulated glass sphere diameter, ball milling 12 hours.Ball milling gained slurry homogenizes to dyestuff with high pressure homogenizer, and operating pressure 40MPa, homogeneous are once.Obtain dye solution at last.This dye solution particle diameter D after testing
50Be 0.20 μ m, D
90Be 0.46 μ m.
The dyestuff largest particle that the draws footpath numerical value of the same grinding medium different diameter of pasty material reduction RSN in the steps A operation
Illustrate: sample solid content: 42%; (dry product is 100% commodity), material ball ratio is identical;
| Silica beads (diameter mm) | 3 | ?5 | ?10 | ?20 | ?30 | ?40 | ?50 | ?60 |
| Largest particle footpath (particle footpath μ m) | 23-25 | ?18-20 | ?15-17 | ?10-12 | ?8-10 | ?10-12 | ?14-16 | ?20-22 |
From table, may find out that because of under the fixed condition, the grinding medium of different diameter 30-40mm on grinding effect is better than other grinding medium to pasty material above.
Claims (10)
1. the preparation technology of a micro-nano reduction dyestuff is characterized in that, may further comprise the steps:
A. vat dyes, dispersion agent and water are added in the ball mill, carry out ball milling and be mixed into pasty material and pre-dispersed;
B. with the pin bar disintegrator gained mixture of last step is flowed the energy impact grinding;
C. the mixture after pulverizing adds defoamer, carries out superfine grinding in two-way screw grinding machine;
D. adopt pin bar disintegrator or high pressure homogenizer to the processing that homogenizes of gained mixture of last step.
2. the preparation technology of micro-nano reduction dyestuff according to claim 1 is characterized in that described vat dyes is that former dyestuff in the dyestuff manufacturing processed is through filter cake after pressure filtration or filter cake dry product after drying.
3. the preparation technology of micro-nano reduction dyestuff according to claim 1 is characterized in that described dispersion agent is methanonaphthalene sodium sulfonate class dispersion agent or lignosulfonic acid salt dispersion agent.
4. the preparation technology of micro-nano reduction dyestuff according to claim 1, the mass ratio that it is characterized in that described vat dyes and dispersion agent is 1: (0.5～4), the mixture solid content that adds behind the water reaches 20～55%.
5. the preparation technology of micro-nano reduction dyestuff according to claim 1, it is characterized in that ball mill described in the step a is unidirectional screw grinding machine or two-way screw grinding machine, grinding medium in the ball mill is ceramic bead, granulated glass sphere, zirconium oxide bead, quartz sand or the pebbles of 5～50 millimeters of diameters, mixing the pre-dispersed time is 20 minutes～20 hours, grinding temperature is 5-70 ℃, pellet mass ratio=1: (2～6), packing factor: 40-80%.
6. the preparation technology of micro-nano reduction dyestuff according to claim 1 is characterized in that described defoamer is silicone based defoamer, alcohol defoaming agent and phosphoric acid ester defoamer.
7. the preparation technology of micro-nano reduction dyestuff according to claim 1, it is characterized in that the grinding medium in the two-way screw grinding machine described in the step c is ceramic bead, granulated glass sphere, zirconium oxide bead or the quartz sand of 1～5 millimeter of diameter, the time of superfine grinding is 1.5～48 hours.
8. the preparation technology of micro-nano reduction dyestuff according to claim 1 is characterized in that described step c and steps d can exchange.
9. the preparation technology of micro-nano reduction dyestuff according to claim 3 is characterized in that described methanonaphthalene sodium sulfonate class dispersion agent is Dispersant MF, dispersing agent C NF or dispersing agent C S; Described lignosulfonic acid salt dispersion agent is synthetic lignosulfonate MS, modified lignin resin sodium sulfonate, dispersion agent M9, dispersion agent M10, dispersion agent M13 or dispersion agent M15.
10. the preparation technology of micro-nano reduction dyestuff according to claim 6 is characterized in that described silicone based defoamer is defoamer S2100, and the phosphoric acid ester defoamer is a tri-n-butyl, and alcohol defoaming agent is an ethanol.
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Application publication date: 20080709 Assignee: Jiangsu Jiali Fine Chemical Co. Ltd. Assignor: Xuzhou Kaida Fine Chemicals Co., Ltd. Contract record no.: 2013320000783 Denomination of invention: Technique for preparing micro-nano reduction dyestuff Granted publication date: 20100602 License type: Common License Record date: 20131120 |
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