CN1081698A - A kind of water squeezing working method of water-based wet pulp pigment - Google Patents
A kind of water squeezing working method of water-based wet pulp pigment Download PDFInfo
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- CN1081698A CN1081698A CN 93112479 CN93112479A CN1081698A CN 1081698 A CN1081698 A CN 1081698A CN 93112479 CN93112479 CN 93112479 CN 93112479 A CN93112479 A CN 93112479A CN 1081698 A CN1081698 A CN 1081698A
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Abstract
The invention discloses a kind of water squeezing method for processing of water-based wet pulp pigment, it adopts suitable flushing agent to mediate with the water-based paint filter cake, can squeeze 50～95% (wt%) except that water content in the filter cake, and then add mixed aid again with water squeezing after filter cake mediate, when changing the surface of pigments performance, flushing agent is extruded again, steam except that behind the flushing agent through heating, obtain the water-based wet pulp pigment product of the said high solid content of the present invention.The flushing agent that reclaims can be recycled.
Description
The present invention relates to a kind of method for processing after 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, makes every effort to avoid the drying course of pigment, wishes to make the water-based wet pulp pigment of high solid content, is 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 40%(wt% at most), can partly satisfy the needs of aqueous color paste industry.
(2) vacuum dehydration method: can obtain the water-based wet pulp pigment of high solid content, but this method is removed the water in the filter cake, need carry out vacuum operating for a long time, the mechanical seal requirement height of device systems not only, and also energy consumption is big.
(3) secondary filter-press dehydration method: this method is carried out the secondary filter-press dehydration after filter cake is carried out surface treatment again, and the solid content of filter cake can reach 35～50%, but during this method secondary filter-press 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 go 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, has proposed a kind of water squeezing working method of suitable water-based paint on the basis of the wettability between pigment and organic solvent, pigment and the water.As everyone knows: pigment is in two immiscible solvents, and with the stronger wet with solvent of at first wetted property, even the weak wet with solvent of the wetted property of pigment, after adding wetting strong solvent, then wetting strong solvent will replace the solvent a little less than the 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 the surface tension of change 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 with water content greater than 70%(wt%) the water-based paint filter cake, place a kneader, adding 40～200%(is the wt% of benchmark with the dry colour) flushing agent, 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 consumption of flushing agent, can remove 50～95%(wt%) moisture content of Total Water in the filter cake.
In the wet pulp pigment after finishing water squeezing, add 5～30% auxiliary agent of dry colour total amount, row is mediated again, to change the surface property of pigment, strengthens the hydrophilic dynamics of pigment, flushing agent is extruded from pigment again.Steam except that behind the flushing agent through heating, promptly obtain product of the present invention-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.Wherein said dispersion agent can be paregal O, 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 75%(wt%) pigment azarin filter cake 200 grams, 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: 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 can be squeezed part 142 grams that anhydrate all 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 75%(wt%) benzidine yellow G pigment filter cake 250 grams, 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, steamed through heating and remove flushing agent.Flushing agent hexanaphthene after the recovery can be used for 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 were all with embodiment 3.Can squeeze part 178 grams that anhydrate.Finally can get wet pulp pigment 84 grams, 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, mediates 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 its ratio of componentss of gram 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, the adding water content is 75%(wt%) pigment azarin filter cake 3420 gram, the flushing agent that adding is made up of hexanaphthene 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, add mixed aid (three mixes by 1: 1: 1 weight ratio) 220 grams of forming by peregal 0+EL+ propylene glycol again, mediated 6 minutes, extrude 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 has giving an example of practicality as the present invention, 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 (8)
1, a kind of water squeezing working method of water-based wet pulp pigment, it is characterized in that mediating the crowded water that removes filter cake with the filter cake of water-based paint with flushing agent, the filter cake that adds then after mixed aid and the water squeezing is mediated the flushing agent of removing in the filter cake again, and heating is steamed and removed the water-based wet pulp pigment that obtains high solid content behind the flushing agent.
2, working method as claimed in claim 1, the suitable consumption that it is characterized in that flushing agent are that 40～200%(is the wt% of benchmark with the dry colour).
3,, it is characterized in that said flushing agent is benzene,toluene,xylene, hexanaphthene, normal heptane, chloroform, tetracol phenixin as claim 1,2 described working methods.
4, working method as claimed in claim 1, the suitable consumption that it is characterized in that said mixed aid are that 5～30%(is the wt% of benchmark with the dry colour).
5, as claim 1,4 described working methods, it is characterized in that said mixed aid is to be combined by one or more dispersion agent and one or more anti-hard caking agent, dispersion agent is 1: 1/3～1 with the ratio of anti-hard caking agent.
6, working method as claimed in claim 5 is characterized in that said dispersion agent is paregal O, polyoxyethylenated castor oil (EL), alizarin assistant, dispersing agent NNO, sulfonated lignin, emulsifier BP.
7, working method as claimed in claim 5 is characterized in that said anti-hard caking agent is propylene glycol, ethylene glycol, glycol ether, glycerine.
8, working method as claimed in claim 1 is characterized in that the time of mediating is 4～20 minutes.
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 true CN1081698A (en) | 1994-02-09 |
| CN1045784C CN1045784C (en) | 1999-10-20 |
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| 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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| CN (1) | CN1045784C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5697984A (en) * | 1995-06-28 | 1997-12-16 | Basf Aktiengesellschaft | Dye preparations with 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 |
Families Citing this family (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 |
-
1993
- 1993-07-07 CN CN93112479A patent/CN1045784C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5697984A (en) * | 1995-06-28 | 1997-12-16 | Basf Aktiengesellschaft | Dye preparations with 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1045784C (en) | 1999-10-20 |
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