CN1045784C - Wringing process for water-soluble wet slurry pigment - Google Patents
Wringing process for water-soluble wet slurry pigment Download PDFInfo
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- CN1045784C CN1045784C CN93112479A CN93112479A CN1045784C CN 1045784 C CN1045784 C CN 1045784C CN 93112479 A CN93112479 A CN 93112479A CN 93112479 A CN93112479 A CN 93112479A CN 1045784 C CN1045784 C CN 1045784C
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Abstract
The present invention discloses a dewatering and processing method of a water-soluble wet slurry pigment. In the method, suitable dewatering agents and filter cakes of a water-soluble pigment are kneaded together to squeeze out 50 to 95% (wt. %) of water in the filter cakes, and then mixing auxiliary agents are added and kneaded with the filter cakes after water is squeezed out; the present invention can alter the surface performance of the pigment at the same time of squeezing the dewatering agents again, and products of the water-soluble wet slurry pigment with a high solid content of the present invention can be obtained after the dewatering agents are steamed away by heating. Recovered dewatering agents can be repeatedly used.
Description
The present invention relates to a kind of aftertreatment such as construction method of organic synthesis pigment, particularly a kind of method for processing after of water-based wet pulp pigment.
As everyone knows, industrial for satisfying the needs of aqueous color paste pigment, common water-based paint with organic synthesis, earlier the method by press filtration obtains water content greater than 70% filter cake, then drying, pulverize and to make water-based paint dry powder, place sand mill to carry out long-time sand milling in water-based paint dry powder and auxiliary agent and water again during use and form.Obviously, the method for processing after of this water-based paint needs very big energy consumption, and this is not only because oven dry needs energy consumption, and because pigment forms secondary crystal in drying course, particle is grown up and reunion etc., has increased pulverizing, the required energy consumption of sand milling.In addition, because drying course also brings the deterioration of pigment mass, and consequent crushing process brings the environmental pollution of dust from flying again, therefore, the method for processing after of this pigment is badly in need of changing in relevant branch of industry, make every effort to avoid the drying course of pigment, wish to make the water-based wet pulp pigment of high solid content, be directly used in the preparation aqueous color paste.
The method for preparing at present high solid content wet pulp pigment in the world has three kinds:
(1) mechanical dehydration method: this method adopts a kind of rotary vane type pressure filter to dewater, owing to be subjected to
The restriction of mechanical separation ability, the pigment wet pulp of gained, its solid content can reach at most
40% (wt%) can partly satisfy the needs of aqueous color paste industry.
(2) vacuum dehydration method: can obtain the water-based wet pulp pigment that height closes solid amount, but this method is removed
Remove the water in the filter cake, need carry out vacuum operating, the not only machine of device systems for a long time
Tool seal request height, and energy consumption is big.
(3) secondary filter-press dehydration method: this method is carried out secondary after filter cake is carried out surface treatment again
Filter-press dehydration.The solid content of filter cake can reach 35～50%, but this method secondary is pressed
During the filter dehydration, filter cake is carried very difficult, troublesome poeration.
The present invention is the industrial requirements that satisfies aqueous color paste pigment, a kind of water squeezing working method of fast and convenient water-based wet pulp pigment is provided, it utilizes the effect of the principle of surface chemistry with flushing agent, moisture content in the filter cake can be squeezed and remove 50%～95% (wt%), and the particulate nature that can keep water-based paint in building-up process, to be held well.
Design of the present invention is such:
The present invention causes the reason of water-based paint particle aggregation (or caking) in further investigation, and the surface tension of pigment, pigment and organic solvent, a kind of water squeezing working method of suitable water-based paint has been proposed on the basis of the wettability between pigment and the water, as everyone knows: pigment is in two immiscible solvents, with the stronger wet with solvent of at first wetted property, even the wet with solvent that the wetted property of pigment is weak, after adding wetting strong solvent, then wetting strong solvent will be replaced the weak solvent of wettability, the present invention is according to the universal law of above-mentioned wetting property, by the flushing agent of selecting to suit, and the technical measures such as surface tension that change water-based paint, make water-based paint at first be adsorbed in free water in the water-based paint by wetting and crowded the swapping out of flushing agent, and then change the surface tension of pigment, making it again can be by water-wet, and displaces flushing agent, by the associating course of processing that oil is squeezed in water squeezing one, finally obtain to satisfy the water-based wet pulp pigment of preparation aqueous color paste requirement.The flushing agent that reclaims can be recycled.
The present invention also is achieved in that
Earlier water content is worked energetically the water-based paint filter cake of 70% (wt%), place a kneader, the flushing agent that adds 40～200% (to be the wt% of benchmark in pigment), mediate water squeezing, suitable flushing agent can be one or more organic solvent, as benzene toluene, dimethylbenzene, hexanaphthene, normal heptane, chloroform, tetracol phenixin etc., the moisture content that is extruded can directly be derived outside the machine.According to the solid content requirement of required wet pulp pigment, regulate the usefulness of flushing agent and put, can remove the moisture content of 50～95% (wt%) of the Total Water in the filter cake,
In the wet pulp pigment after finishing water squeezing, 5～30% the auxiliary agent that adds the dry colour total amount, row is mediated again, to change the surface property of pigment, strengthen the hydrophilic dynamics of pigment, again flushing agent is extruded from pigment, is steamed except that behind the flushing agent, promptly obtain product of the present invention through heating--water-based wet pulp pigment.Said auxiliary agent can be mixed (also dispersion agent and anti-hard caking agent can be added respectively in proportion certainly) by one or more dispersion agent and one or more anti-hard caking agent, suitable dispersion agent is 1: 1/3～1 with the ratio of anti-hard caking agent, and wherein said dispersion agent can be peregal 0, polyoxyethylenated castor oil (EL), alizarin assistant, dispersing agent NNO (naphthalene sulfonic acidformaldehyde condensation product), sulfonated lignin, emulsifier BP etc.Said anti-hard caking agent can be propylene glycol, ethylene glycol, glycol ether, glycerine etc.Suitable kneading (water squeezing or the crowded oil) time is 4～20 minutes.
The water-based wet pulp pigment that makes according to method of the present invention, has solid content height (as reaching more than 85%) by the ratio of pigment with water, with glassware for drinking water good affinity is arranged, the aqueous color paste made from it has advantages such as fine size, good dispersity, form and aspect be pure, can satisfy the needs of aqueous color paste industry fully.
Further illustrate content of the present invention below in conjunction with embodiment,
Embodiment 1
Adding water content in a container is pigment azarin filter cake 200 grams of 75% (wt%), add flushing agent normal heptane 70 grams, stir and mediate water squeezing 5 minutes, can remove moisture content 98 grams, add again by mixed aid (three mixes by 1: 1: 1 weight ratio) 8 grams that paregal O+the EL+ propylene glycol is formed, stir and mediated 5 minutes, the flushing agent normal heptane is extruded, heating is steamed and is removed flushing agent then, and the flushing agent of recovery can be used for water squeezing next time.Finally can get wet pulp pigment product 110 grams, its ratio of components is: the pigment azarin: 45.5% (wt%, down together),
Mixed aid: 7.3%,
Water: 47.2%,
Embodiment 2
Except the add-on of flushing agent normal heptane was 100 grams, all the other conditions all can be squeezed part 142 grams that anhydrate with embodiment 1., finally can get wet pulp pigment 66 grams, and its ratio of components is:
Pigment azarin: 75.8% (wt%, down together)
Mixed aid: 12.1%,
Water: 12.1%.
Embodiment 3
Adding water content in a container is benzidine yellow G pigment filter cake 250 grams of 75% (wt%), add flushing agent hexanaphthene 100 grams, stir and mediate water squeezing 5 minutes, can remove moisture content 132 grams, add mixed aid (the two mixes by 1: 1 weight ratio) 12 grams of forming by paregal O and ethylene glycol again, stir and mediated 5 minutes, the flushing agent hexanaphthene is extruded, remove flushing agent through steaming as heat, the flushing agent hexanaphthene after the recovery can be for the usefulness of water squeezing next time.Finally can get wet pulp pigment product 130 grams, its ratio of components is:
Benzidine yellow G: 48.4% (wt%, down together),
Mixed aid: 9.8%,
Water: 41.8%.
Embodiment 4
Except the add-on of flushing agent hexanaphthene was 125 grams, all the other conditions all can be squeezed part 178 grams that anhydrate with embodiment 3., finally can get wet pulp pigment 84 grams, and its ratio of components is:
Benzidine yellow G: 74.49% (wt%, down together)
Mixed aid: 14.3%.
Water: 11.3%.
Embodiment 5
The adding water content is 70% phthalocyanine green filter cake 200 grams in a container, adds flushing agent toluene 70 grams.Mediate water squeezing 4 minutes, can squeeze part 105 grams that anhydrate;
Add mixed aid (the two mixes by 1: 1 weight ratio) 8 grams of forming by dispersing agent NNO and propylene glycol again, mediated 4 minutes, extrude toluene.Can use for water squeezing next time through the toluene that adds after thermal distillation is reclaimed.Finally can get wet pulp pigment 103 fixed its ratio of componentss is:
Phthalocyanine green: 58.3% (wt%, down together)
Mixed aid: 7.8%,
Water: 33.9%,
Embodiment 6
Adding water content in a container is 77% (wt%) bronze red C color lake filter cake, 200 grams, add flushing agent benzene 80 grams, mediate water squeezing 5 minutes, can squeeze part 121 grams that anhydrate, add mixed aid (the two mixes by 1: 1 weight ratio) 10 grams of forming by alizarin assistant and glycerine again, mediate 4 minutes, extrude benzene, benzene through adding after thermal distillation is reclaimed can supply water squeezing usefulness next time, finally can get wet pulp pigment 89 grams, and its ratio of components is:
Bronze red C pigment lake: 51.7% (wt%, down together)
Mixed aid: 11.2%.
Water: 37.1%.
Embodiment 7
In a small-sized kneader.Adding water content is pigment azarin filter cake 3420 grams of 75% (wt%), the flushing agent that adding is made up of cyclohexane and normal heptane (the two mixes by 1: 1 weight ratio) 1285 grams, mediate water squeezing 7 minutes, can squeeze part 1665 grams that anhydrate, power u goes into mixed aid (three mixes by 1: 1: 1 weight ratio) 220 grams by paregal O+the EL+ propylene glycol is formed again, mediated 6 minutes, and extruded hexanaphthene and normal heptane, can use for water squeezing next time through the flushing agent that adds after thermal distillation is reclaimed.Finally can get wet pulp pigment 1975 grams, its ratio of components is:
Pigment azarin: 43.3% (wt%, down together).
Mixed aid: 11.1%.
Water: 45.6%.
By the foregoing description 1～7 as seen: the water squeezing working method of the said water-based wet pulp of the present invention pigment, have efficient, quick, easy advantage, can satisfy the requirement of mill base industry high solid content.
Point out in passing: the foregoing description only as the present invention have practicality for example, it does not limit content of the present invention because, the technician in any professional domain.All can prepare the water-based wet pulp pigment product of qualified high solid content according to design of the present invention.
Claims (2)
1. the water squeezing working method of a water-based wet pulp pigment, it is characterized in that mediating the crowded water that goes in the filter cake with the filter cake of water-based paint with flushing agent, add filter cake after mixed aid and the water squeezing then and mediate and squeeze the flushing agent that goes in the filter cake, heating is steamed to remove and is reclaimed the water-based wet pulp pigment that obtains high solid content behind the flushing agent; Wherein: (1) said flushing agent is one or more organic solvent, and they are respectively benzene,toluene,xylene, hexanaphthene, normal heptane, chloroform, tetracol phenixin, and its consumption is the 40-200% (wt) of dry colour amount; (2) said mixed aid is to be combined by one or more dispersion agent and one or more anti-hard caking agent, both combination ratios are: 1:(1/3-1), its consumption is the 5-30% (wt) of dry colour): said dispersion agent is a peregal 0, polyoxyethylenated castor oil, alizarin assistant, naphthalene sulfonic acidformaldehyde condensation product, sulfonated lignin, emulsifier BP, said anti-hard caking agent are propylene glycol, ethylene glycol, a diethyl acetal, glycerine.
2. the method for claim 1 is characterized in that the kneading time is 4-20 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93112479A CN1045784C (en) | 1993-07-07 | 1993-07-07 | Wringing process for water-soluble wet slurry pigment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93112479A CN1045784C (en) | 1993-07-07 | 1993-07-07 | Wringing process for water-soluble wet slurry pigment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1081698A CN1081698A (en) | 1994-02-09 |
| CN1045784C true CN1045784C (en) | 1999-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93112479A Expired - Fee Related CN1045784C (en) | 1993-07-07 | 1993-07-07 | Wringing process for water-soluble wet slurry pigment |
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| Country | Link |
|---|---|
| CN (1) | CN1045784C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295862A (en) * | 2010-06-24 | 2011-12-28 | 上海启鹏工程材料科技有限公司 | Method for producing water-based color paste |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19523464A1 (en) * | 1995-06-28 | 1997-01-02 | Basf Ag | Dye preparations containing ethylene oxide-castor oil reaction products |
| CN102558611A (en) * | 2011-12-26 | 2012-07-11 | 上海捷虹颜料化工集团股份有限公司 | Pigment prepared product and preparation method thereof |
| CN103773616A (en) * | 2013-11-18 | 2014-05-07 | 蚌埠天光传感器有限公司 | Dedicated antiscaling agent for plate developing machine and preparation method of antiscaling agent |
| CN108912848A (en) * | 2018-06-04 | 2018-11-30 | 珠海市誉达伟业科技有限公司 | Pigment preparations mill base |
-
1993
- 1993-07-07 CN CN93112479A patent/CN1045784C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295862A (en) * | 2010-06-24 | 2011-12-28 | 上海启鹏工程材料科技有限公司 | Method for producing water-based color paste |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1081698A (en) | 1994-02-09 |
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