CN103981752A - Preparation method for cationic modified fixer applied to DCS (Dissolved and Colloidal Substances) - Google Patents
Preparation method for cationic modified fixer applied to DCS (Dissolved and Colloidal Substances) Download PDFInfo
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- CN103981752A CN103981752A CN201410179142.9A CN201410179142A CN103981752A CN 103981752 A CN103981752 A CN 103981752A CN 201410179142 A CN201410179142 A CN 201410179142A CN 103981752 A CN103981752 A CN 103981752A
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Abstract
The invention discloses a preparation method for cationic modified fixer applied to DCS (Dissolved and Colloidal Substances). The method first uses hot water at 70 DEG C to 90 DEG C to wash raw mineral soil and then stirs and treats the raw mineral soil with sulfuric acid at 70 DEG C to 90 DEG C for 6 to 24 hours; after a product is filtered, clean water is used for washing the product, and the product is dried and then calcined to be activated under the condition of 200 DEG C to 500 DEG C for 1 to 3 hours, so that refined mineral soil is obtained; 100 parts of refined mineral soil, 1 to 10 parts of cationic surfactant and 100 to 500 parts of water are mixed in parts by weight and treated for 6 to 12 hours at the temperature of 30 DEG C to 70 DEG C; a product is filtered by suction, supernatant liquid is removed, remaining solid is washed with water, dried, ground and screened by a sieve which has 200 to 400 meshes, and thereby the cationic modified fixer is obtained. The method is simple, preparation is easy, and the obtained cationic modified fixer has a good effect in removing fine organic pollutants in mimetic diluted emulsion or real white water.
Description
Technical field
The present invention relates to one and determining agent, particularly relate to one and be applied to pulping and paper-making plain boiled water, remove the preparation method who is determining agent of one or more the fine organic pollutions in pulping and paper-making plain boiled water to adsorb, to determine method, belong to Secondary Fiber's Recycle Technology field.
Background technology
Waste paper is as the secondary stock raw material reuse of pulping and paper-making, and because the advantages such as its environmental protection, low pollution, small investment more and more come into one's own, but also existing a persistent ailment is exactly sicker (stickies) problem.Sicker generally can think to derive from the emplastic of recycled fiber, and it mainly comprises kinds of artificial synthesis of organic substance and the part wood extractives such as pressure sensitive adhesive, hot melt adhesive, wax, coating, resin and base-material.Sicker disperses in waste paper pulp-making, pumping, heat, constantly accumulate dispersion in rubbing process, forms the gluing composition granule of different-grain diameter, and wherein particle diameter is greater than large sicker of being called of 0.10～0.15mm, is less than fine sicker of being called of this particle diameter.
Fine sicker in pulping and paper-making plain boiled water is commonly referred to as and dissolves and colloidality material (Dissolved and Colloidal Substances is called for short DCS).This type of material is very harmful to pulp and paper production, as: be deposited on forming net, stop up mesh, cause drainage difficulty, increase the stop cleaning time; Be deposited on squeezing felt-cloth and pressure roller, shorten felt service life, affect page and dewater; Sticking on dryer surface causes page to break end; Remain in page, form stain, increase paper defects; Be gathered in plain boiled water, form " anionic trash ", affect the effect of ion auxiliary agent, the closed circulation of paper making water is exerted an influence.By contrast, seem the microstickies that not directly causes gluing thing deposition, actually more difficult place to go, in the time that system environments is undergone mutation (as the variation of temperature, pH) will deposit in a large number, the harm bringing to whole system is larger.
At present most popularly in industrial production remain traditional heat dispersion, slotted screen and By Bubble-floating Method etc.Its operating principle of hot dispersion method is the size of at high temperature application of shear force reduction foreign particle, sicker is formed to less particle, be suitable for staying in product and do not have significant sensation, the method can be mingled with part sicker in paper feed page and remove, but still has the tiny sicker of considerable part to be still present in Recirculating white water; Slotted screen method is to carry out the separation of sicker taking size as foundation, and the method can not screen out fine sicker, simultaneously because the large sicker of elasticity of sicker self also has the residual of part; By Bubble-floating Method is the Impurity removal method similar with floatation and ink removing, can remove the sicker with a certain size, but helpless for fine sicker.The control of dissolving and colloidality material has physics, chemistry and biological method, and wherein chemical method (comprise dispersion method, absorption or viscosity reduction method, set or determining method) is comparatively to commonly use and effective method.
Patent 200610019980.5 discloses the method for removing adhesive in pulping process using wastepaper as raw material, it is in the nature steam explosion, it is the pretreated physical method of a kind of additional chemical, the method and traditional hot dispersion method are similar, and the fine sicker that still has considerable part after processing is present in Recirculating white water.Patent 200780045160.6 discloses resin and the stickies control method in slurrying and paper-making process, adopt biology enzyme and nonionisable substance to suppress the deposition of sicker, belong to dispersion method, sicker exists all the time in plain boiled water, only can not assemble within the specific limits.As everyone knows, DCS is the material of a class with negative electrical charge, and therefore positively charged compound has extraordinary absorption or flocculating effect to it.Patent 200910036009.7 discloses controlling agent and the using method thereof of in a kind of paper machine Recirculating white water, dissolving colloid thing, coordinate the polymer of high molecular, Gaoyang charge density with aluminium polychloride, be applied to slurry or short Recirculating white water, but it is comparatively harsh that the method requires controlling agent component, and only DCS content can be controlled in the scope of 800～900mg/L, further not reduce its content.
If DCS thoroughly can not be removed from pulp and paper production, be accumulated to and to a certain degree still have the possibility working the mischief; And the third method is namely being determined method, be combined with sicker with a kind of material with cationic charge, be fixed in and determining on agent or page and take system out of, DCS is thoroughly removed from system, just have and fundamentally avoid its deposition, assemble and the possibility that works the mischief.Therefore, the method for determining has prior meaning to the removal of DCS.
Summary of the invention
For purifying pulping and paper-making plain boiled water, remove one or more the fine organic pollutions in mthod of white water from paper making to adsorb, to determine method, the invention provides a kind of cation-modified preparation method who is determining agent.
Mineral clay also has good absorption property to the material of colloidality, and this is because mineral soil has unique layer structure, has very high rigidity, not slippage of interlayer; In aspect, have the replaceable negative electrical charge of some, these negative electrical charges are by adsorbing some hydrated cation (Na at interlayer
+, Li
+deng) compensate, so being easy to exchange with organic or inorganic CATION, the CATION of interlayer absorption obtains the mineral soil of modification.Due to these design features, make mineral soil have excellent adsorptivity, ion exchangeable, colloid dispersiveness, thixotropy, suspension, can intercalation modifying etc. characteristic, thereby all have purposes widely in industries such as chemical industry, building materials, biology, electronics, agriculturals.The present invention carries out modification by mineral soil with cationic compound, and the humatite soil obtaining will have more significant adsorption effect to DCS.
A cation-modified preparation method who is determining agent who is applied to DCS, comprises the steps:
(1) by 70 DEG C～90 DEG C hot washes for original soil of mineral soil, then with mass concentration be 20%～40% sulfuric acid stir process 6～24h at 70 DEG C～90 DEG C; Described mineral soil original soil is one or more in diatomite, bentonite, talcum powder and palygorskite;
(2) product of step (1) is filtered, with clear water washing 3 times～5 times, dry, then calcining and activating 1h～3h under 200 DEG C～500 DEG C conditions, must refine mineral soil;
(3) in mass fraction, will refine 100 parts, mineral soil, 1～10 part of cationic surfactant, 100～500 parts of mixing of water, under 30 DEG C～70 DEG C of temperature and rotating speed 500r/min～1500r/min condition, process 6～12h; Described cationic surfactant is that carbon number is 12～18 alkyl ammonium halide;
(4) by the product suction filtration in step (3), remove the liquid in product, wash remaining solid with water, be dried and grind, sieve, obtain the cation-modified agent of determining.
Preferably, described alkyl ammonium halide is one or more in Dodecyl trimethyl ammonium chloride, DTAB, hexadecyltrimethylammonium chloride, softex kw, octadecyl trimethyl ammonium chloride and Cetyltrimethylammonium bromide.
The mass ratio of the described mineral soil original soil of step (1) and sulfuric acid is 1:0.5～1:1.5.
The mass ratio of the described refining mineral soil of step (3), cationic surfactant and water is 100:1～5:100～500.
The mass ratio of the described mineral soil original soil of step (1) and hot water is 1:1～5.
The temperature of described calcining is 350 DEG C～450 DEG C.
The number of times of the described remaining solid washing of step (4) is 3 times～5 times.
The screen number sieving described in step (4) is 200 order～400 orders
The described cation-modified processing of determining agent and be applied to pulping and paper-making plain boiled water, removes the fine organic pollution of plain boiled water for determining method, dissolve and the removal of colloidality material.
Compared with prior art, the present invention has the following advantages:
(1) prepared cation-modified of the present invention determined agent and is being applied to the processing of pulping and paper-making plain boiled water, can effectively remove the DCS in plain boiled water, reduces the energy consumption of follow-up workshop section;
(2) the present invention, for cationic surfactant modified mineral is native and utilization provides a concrete application direction, can also create certain economic benefit simultaneously;
(3) technique refining of the present invention, method is simple, is easy to preparation.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is done to further detailed description, but be only not used in and limit the scope of the invention for the present invention is described.Other are any does not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitute, in conjunction with, simplify, be equivalents, fall within equally the application's appended claims limited range.
Embodiment 1
(1) get 200g bentonite original soil, wash with the hot water of 500g90 DEG C, then with 200g mass concentration be 20% sulfuric acid stir process 12h at 70 DEG C;
(2) product of step (1) is filtered, with clear water washing 3 times, dry, then put into Muffle furnace and calcine 3h under 350 DEG C of conditions, obtain refining bentonite;
(3) will refine 100 parts of bentonites, 1 part of Dodecyl trimethyl ammonium chloride, 200 parts of mixing of water, under 40 DEG C of temperature and rotating speed 1000r/min condition, process 6h;
(4) by the product suction filtration in step (3), remove supernatant liquid, wash remaining solid with water 3 times, then by solid drying and grind, cross 200 mesh sieves, obtain the cation-modified agent of determining.
This is cation-modified is determining agent numbering 1#.
Embodiment 2
(1) get 200g diatomite original soil, wash with 600g80 DEG C of hot water, then use 250g35% sulfuric acid stir process 8h at 80 DEG C;
(2) product of step (1) is filtered, with clear water washing 5 times, dry, then put under 400 DEG C of conditions of Muffle furnace and calcine 2h, obtain terra silicea purificata;
(3) by 100 parts of terra silicea purificatas, 5 parts of Cetyltrimethylammonium bromides, 500 parts of mixing of water, under temperature 70 C and rotating speed 500r/min condition, process 12h;
(4) by the product suction filtration in step (3), remove supernatant liquid, wash remaining solid with water 3 times, then by solid drying and grind, cross 400 mesh sieves, obtain the cation-modified agent of determining.
This is cation-modified is determining agent numbering 2#.
Embodiment 3
(1) get 200g palygorskite original soil, wash with 300g90 DEG C of hot water, then use 250g38% sulfuric acid stir process 10h at 90 DEG C;
(2) product of step (1) is filtered, with clear water washing 5 times, dry, then calcining and activating 1h under 400 DEG C of conditions in Muffle furnace, obtains refining palygorskite;
(3) will refine 100 parts of palygorskites, 3 parts of softex kws, 300 parts of mixing of water, under 30 DEG C～70 DEG C of temperature and rotating speed 1000r/min condition, process 12h;
(4) by the product suction filtration in step (3), remove supernatant liquid, wash remaining solid with water 3 times, then by solid drying and grind, cross 300 mesh sieves, obtain the cation-modified agent of determining.
This is cation-modified is determining agent numbering 3#.
Embodiment 4
(1) get 200g talcum powder original soil, wash with 800g70 DEG C of hot water, then use 150g30% sulfuric acid stir process 12h at 85 DEG C;
(2) product of step (1) is filtered, with clear water washing 4 times, dry, then calcining and activating 1.5h under 450 DEG C of conditions in Muffle furnace, obtains purified talc;
(3) by 100 parts of purified talcs, 2 parts of hexadecyltrimethylammonium chlorides, 250 parts of mixing of water, under 30 DEG C of temperature and rotating speed 1500r/min condition, process 6h;
(4) by the product suction filtration in step (3), remove supernatant liquid, wash remaining solid with water 3 times, then by solid drying and grind, cross 200 mesh sieves, obtain the cation-modified agent of determining.
This is cation-modified is determining agent numbering 4#.
The cation-modified application of determining agent
With fine sicker analogies (polyvinyl acetate PVAc emulsion) and machine water (filter screen 200 orders, recording its DCS content is 414.4mg/L) for experimental subjects, prepared cation-modified of various embodiments of the present invention determined to agent and determining to remove experiment.
Get be respectively numbered 1#～4# cation-modified and determining agent 4g, join respectively 500mL content and be in the PVAc dilute emulsion of 100mg/L and plain boiled water that DCS content is 414.4mg/L, controlling temperature is 50 DEG C, and rotating speed is 500r/min, and experimental period is 6h.Experiment finishes rear standing 2h, gets supernatant liquor, carries out the UV absorbance detection at 240nm place, and each sample detects 3 times, averages and compares with blank sample, to determine the minimizing of fine organic pollution.
Experimental result is summarized in table 1 and table 2.
The effect that table 1 is cation-modified is determining agent and be applied to PVAc
The effect that table 2 is cation-modified is determining agent and be applied to DCS in plain boiled water
Can find out by above experimental result, prepared by the present invention is cation-modifiedly determining agent and is processing for mthod of white water from paper making, can reach 75%～85% to the clearance of DCS analogies; Can approach or exceed 75% to the clearance of DCS in actual plain boiled water.
Contrast patent 200910036009.7 (dissolving controlling agent and the using method thereof of colloid thing in paper machine Recirculating white water), according to determining the fine sicker of method control equally, controlling agent component is required comparatively harsh, need to coordinate the polymer of high molecular, Gaoyang charge density, and only DCS content can be controlled in the scope of 800～900mg/L.And CATION of the present invention is being determined agent, its electropositive derives from common alkyl ammonium halide, has greatly relaxed the requirement to preparation component; Can find out simultaneously, the in the situation that of DCS content 414.4mg/L, still have the clearance of 75% left and right, and the clearance of the DCS analogies that are 100mg/L to content can reach 75%～85%, mineral soil is combined with cationic compound, do not rely on merely the compound of positive charge, CATION prepared by the present invention determining agent to fine sicker determining more efficient.
Visible, prepared by the present invention, and cation-modified to determine agent technique simple, and the fine sicker DCS in reclaimed fibre mthod of white water from paper making is had to good removal effect.
Claims (8)
1. a cation-modified preparation method who is determining agent who is applied to DCS, is characterized in that comprising the steps:
(1) by 70 DEG C～90 DEG C hot washes for original soil of mineral soil, then with mass concentration be 20%～40% sulfuric acid stir process 6～24h at 70 DEG C～90 DEG C; Described mineral soil original soil is one or more in diatomite, bentonite, talcum powder and palygorskite;
(2) product of step (1) is filtered, with clear water washing 3 times～5 times, dry, then calcining and activating 1h～3h under 200 DEG C～500 DEG C conditions, must refine mineral soil;
(3) in mass fraction, will refine 100 parts, mineral soil, 1～10 part of cationic surfactant, 100～500 parts of mixing of water, under 30 DEG C～70 DEG C of temperature and rotating speed 500r/min～1500r/min condition, process 6～12h; Described cationic surfactant is that carbon number is 12～18 alkyl ammonium halide;
(4) by the product suction filtration in step (3), remove the liquid in product, wash remaining solid with water, be dried and grind, sieve, obtain the cation-modified agent of determining.
2. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: described alkyl ammonium halide is one or more in Dodecyl trimethyl ammonium chloride, DTAB, hexadecyltrimethylammonium chloride, softex kw, octadecyl trimethyl ammonium chloride and Cetyltrimethylammonium bromide.
3. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: the mass ratio of the described mineral soil original soil of step (1) and sulfuric acid is 1:0.5～1:1.5.
4. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: the mass ratio of the described refining mineral soil of step (3), cationic surfactant and water is 100:1～5:100～500.
5. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: the mass ratio of the described mineral soil original soil of step (1) and hot water is 1:1～5.
6. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: the temperature of described calcining is 350 DEG C～450 DEG C.
7. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: the number of times of the described remaining solid washing of step (4) is 3 times～5 times.
8. the cation-modified preparation method who is determining agent of the DCS of being applied to according to claim 1, is characterized in that: the screen number sieving described in step (4) is 200 order～400 orders.
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Cited By (3)
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| CN105001410A (en) * | 2015-07-27 | 2015-10-28 | 天禾化学品（苏州）有限公司 | Novel positive ion fixative preparing method |
| CN106552586A (en) * | 2016-11-27 | 2017-04-05 | 辽宁石油化工大学 | A kind of DTAB modified talc filter aids for filtering aqueous suspension ofkaolin |
| CN114150527A (en) * | 2021-12-17 | 2022-03-08 | 杭州绿邦科技有限公司 | Retention and drainage aid |
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| CN114150527A (en) * | 2021-12-17 | 2022-03-08 | 杭州绿邦科技有限公司 | Retention and drainage aid |
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