CN106046598A - Novel environment-friendly modified bentonite PVC heat stabilizer - Google Patents
Novel environment-friendly modified bentonite PVC heat stabilizer Download PDFInfo
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- CN106046598A CN106046598A CN201610468586.3A CN201610468586A CN106046598A CN 106046598 A CN106046598 A CN 106046598A CN 201610468586 A CN201610468586 A CN 201610468586A CN 106046598 A CN106046598 A CN 106046598A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention discloses a novel environment-friendly modified bentonite PVC heat stabilizer, which belongs to the technical field of deep processing of bentonite. The novel environment-friendly modified bentonite PVC heat stabilizer is prepared in the following steps of material preparing, pulping, acid activation reaction, filter pressing, alkalization, surface modification of alkaline clay particles, drying, crushing and the like. According to the novel environment-friendly modified bentonite PVC heat stabilizer disclosed by the invention, the Ca(OH)2 content is 41 to 43 wt%, the activity index is 97% to 99%, and the heat stable time is 153 to 158 min; the novel environment-friendly modified bentonite PVC heat stabilizer disclosed by the invention is loaded, the form of the heat stabilizer remains unchanged after adsorbing hydrogen chloride, and salt or organic pollutants PVC cannot be released; the novel environment-friendly modified bentonite PVC heat stabilizer disclosed by the invention has the advantages of no toxicity, no odor, safety and environmental friendliness.
Description
Technical field
The invention belongs to bentonite deep process technology field, be specifically related to a kind of novel environment friendly modified alta-mud PVC heat steady
Determine agent.
Background technology
Bentonite is referred to as natural nano-material, general-purpose clay.China's bentonite is best in quality, and ore reserves occupies the second in the world
Position, in addition to exporting as bentonite raw material on a small quantity, remaining is all on sale throughout domestic with bentonite in powder and active hargil form, this
A little products belong to primary product, and economic benefit is the highest, and level of resource utilization is low.In order to obtain bigger economic benefit, need exploitation
The seriation new product of high-tech content, expansive approach frontier.
Patent Application Publication " preparation method of a kind of loaded calcium hydroxide activity carclazyte (application number:
201510081886.1) " disclosing the preparation method of a kind of loaded calcium hydroxide activity carclazyte, described loaded calcium hydroxide is lived
Property hargil be through dispensing slurrying, acid activation reaction, filter pressing for the first time, washing and second time filter pressing, alkalization, for the third time filter pressing,
Prepared by the steps such as dry, pulverizing, whiteness is the highest, alkali capacity is low, quality owing to existing for the alkaline hargil that the method is produced
The shortcomings such as instability, have impact on it and apply further.
PVC (polrvinyl chloride) is the thermoplastic polymer generated by chloroethylene polymerization reaction, owing to its goods have soft
Hardness easy-regulating, mechanical property are preferable, corrosion-resistant, electrical insulating property height good, transparent and the advantage such as inexpensive, building, light industry,
The fields such as chemical industry, electronics, space flight, automobile, agricultural have and has been widely used.But, PVC is susceptible to heat in the course of processing
Signs of degradation, produces hydrogen chloride, and hydrogen chloride has catalysis accelerated degradation effect.It is thus typically necessary to interpolation heat stabilizer
To suppress thermal degradation, improve the performance of PVC product.
Modified alta-mud PVC heat stabilizer is generally alkalescence material, mainly has lead salts, metal soap, organic species
And their mixture, in use, its active component directly contacts these heat stabilizers with PVC, adds in PVC thermoforming
The hcl reaction that after work, stabilizer discharges with PVC decomposed, generates chloride salt, these salts property to PVC
Can produce impact.Houghite modified alta-mud PVC heat stabilizer is a kind of stratiform weak base material, although its interlayer has suction
The ability of attached hydrogen chloride, but its adsorption capacity is little, plays mainly its crystal layer of active component, generates after it and hcl reaction
Aluminum chloride and magnesium chloride, also produce impact to conduction, the mechanical mechanics property of PVC.
The yield of China's modified alta-mud PVC heat stabilizer is continuously increased at present, lead system the most poisonous, with serious pollution heat
Stabilizer does not the most reduce, and has certain increase on the contrary, and this is antipathetic to today of pay attention to day by day environment with safety.
Bentonite, calcium hydroxide are all nontoxic, tasteless, make alkalescence hargil have good Safety and Environmental Protection base as heat stabilizer
Plinth.Calcium hydroxide in alkalescence hargil has extremely strong adsorbing chlorinated Hydrogen Energy power, and bentonite itself also has material filler merit
Can, the product after adsorbing chlorinated hydrogen is stayed in montmorillonite, thus is expected to become the heat stabilizer of a kind of function admirable.Guangxi has
Abundant bentonite resource, wherein the bentonite ore of Ningming County is maximum, and proved reserves are 6.1 hundred million tons, accounts for the 1/4 of whole nation reserves,
The bentonite ore smectite content of Tiandong County is more than 80%.Therefore, develop modified alta-mud PVC heat stabilizer, to exploitation locality
Affluent resources, development local economy has great importance.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of novel environment friendly modified alta-mud PVC heat stabilizer, to solve
The problems such as prior art neutral and alkali hargil alkali capacity is low, quality is unstable, lipophile is poor.Novel environment friendly prepared by the present invention is modified
Bentonite PVC heat stabilizer is nontoxic, tasteless, safety and environmental protection, and quality is high.
For solve above technical problem, the present invention by the following technical solutions:
A kind of novel environment friendly modified alta-mud PVC heat stabilizer, its preparation method comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 10%-16% are mixed by weight for 1.6-2.2:10-14, is turning
Speed, for stirring under 200-500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%-20%, described inorganic mixing
Acid is the phosphoric acid 3-5:2-4 by volume of the carbonic acid of concentration 22-26wt%, the oxalic acid of concentration 28-32wt%, concentration 18-20wt%:
The mixed acid of 2-3 composition, pasty material A is 1-3.2:4-16 with the weight ratio of inorganic mixed acid, is 200-550r/ at rotating speed
Adding the stirring of trisulfides sodium under min, trisulfides sodium is 1-2:50-150 with the weight ratio of pasty material A, is heated to 82-93 DEG C,
React 1.2-3.2h at being maintained at 82-93 DEG C, prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-
The filter cake A of 45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 6-7.5 times of filter cake A weight, stirring and dissolving filter
Cake A adds flocculant stirring 0.4-1.2h the most afterwards makes solution precipitate, and is pressed by precipitate under pressure is 0.9-0.95MPa
Filter, prepared moisture content is the filter cake B of 32%-45%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 5-6.5 times of filter cake B weight, and stirring and dissolving is filtered
After cake A is complete, add aqua calcis, prepare slurry material C；
S6: the slurry material C that step S5 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-45%
Filter cake C；
S7: the filter cake C that step S6 prepares is placed in centrifuge, removes water to filter cake under centrifugal rotational speed is 4000-6000r/min
Pulverizing after C moisture content≤5%, gained ground product sieves A, prepares loaded calcium hydroxide activity carclazyte.
S8: the alkaline hargil that step S7 prepares is made into the solution that concentration is 4%-12%, adds alkalescence hargil quality 12%-
The serine of 30%, stirring reaction 75-120min under rotating speed 200-400r/min, prepare slurry material D；
S9: the slurry material D that step S8 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-45%
Filter cake D；
S10: the filter cake D that step S9 prepares is placed in centrifuge, removes water to filter under centrifugal rotational speed is 4000-6000r/min
Pulverizing after cake D moisture content≤5%, gained ground product sieves B, prepares novel environment friendly modified alta-mud PVC heat stabilizer.
Further, the one during flocculant described in step S4 includes organic flocculant and inorganic flocculating agent.
Further, the one during described organic flocculant includes sodium polyacrylate, calcium polyacrylate (CPA), acrylamide.
Further, the one during described inorganic flocculating agent includes bodied ferric sulfate, polyaluminium sulfate.
Further, aqua calcis concentration described in step S5 is 8%-12%.
Further, the mesh number sieving A described in step S7 is 300-600 mesh.
Further, the mesh number sieving B described in step S10 is 200-500 mesh.
The method have the advantages that
(1) present invention adds the Fe that acid corrosion equipment can be produced by reducing agent3+It is reduced to the Fe of light color2+, it is to avoid Fe3+Band
The whiteness of the Color influences active hargil come；
(2) the alkaline hargil production efficiency of the present invention is high, energy consumption and low cost；
(3) novel environment friendly modified alta-mud PVC heat stabilizer Ca (OH) that the present invention produces2Content is 41-43wt%, and activity refers to
Number is 97%-99%, and heat-stable time is 153-158min, and the novel environment friendly modified alta-mud PVC that present invention process produces is described
Heat stabilizer quality is high and stable；
(4) present invention uses centrifuging to remove water, and efficiency is high so that whole production technology cycle time；
(5) the recyclable recycling of gained spent acid of the present invention, effectively reduces acid and processes the cost of sewage, beneficially energy-saving and emission-reduction；
(6) present invention is changed into lipophilic the surface characteristic of alkalescence hargil granule from hydrophilic, and novel environment friendly modification can be made swollen
Profit soil PVC heat stabilizer is more preferable with the PVC compatibility；
(7) the novel environment friendly modified alta-mud PVC heat stabilizer that the present invention produces is support type, heat stabilizer after adsorbing chlorinated hydrogen
Form keep constant, salt or Organic Pollution PVC will not be discharged；
(8) the novel environment friendly modified alta-mud PVC heat stabilizer that the present invention produces is nontoxic, tasteless, safety and environmental protection；
(9) raw material sources are easy to get, and preparation is easily.
Detailed description of the invention
For ease of being more fully understood that the present invention, being illustrated by following example, these embodiments belong to the present invention's
Protection domain, but it is not intended to protection scope of the present invention.
A kind of novel environment friendly modified alta-mud PVC heat stabilizer, its preparation method comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 10%-16% are mixed by weight for 1.6-2.2:10-14, is turning
Speed, for stirring under 200-500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%-20%, described inorganic mixing
Acid is the phosphoric acid 3-5:2-4 by volume of the carbonic acid of concentration 22-26wt%, the oxalic acid of concentration 28-32wt%, concentration 18-20wt%:
The mixed acid of 2-3 composition, pasty material A is 1-3.2:4-16 with the weight ratio of inorganic mixed acid, is 200-550r/ at rotating speed
Adding the stirring of trisulfides sodium under min, trisulfides sodium is 1-2:50-150 with the weight ratio of pasty material A, is heated to 82-93 DEG C,
React 1.2-3.2h at being maintained at 82-93 DEG C, prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-
The filter cake A of 45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 6-7.5 times of filter cake A weight, stirring and dissolving filter
Cake A adds flocculant stirring 0.4-1.2h the most afterwards makes solution precipitate, and is pressed by precipitate under pressure is 0.9-0.95MPa
Filter, prepared moisture content is the filter cake B of 32%-45%, and described flocculant includes the one in organic flocculant and inorganic flocculating agent, institute
State organic flocculant and include that the one in sodium polyacrylate, calcium polyacrylate (CPA), acrylamide, described inorganic flocculating agent include polymerization
One in iron sulfate, polyaluminium sulfate；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 5-6.5 times of filter cake B weight, and stirring and dissolving is filtered
After cake A is complete, add aqua calcis, prepare slurry material C；
S6: the slurry material C that step S5 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-45%
Filter cake C；
S7: the filter cake C that step S6 prepares is placed in centrifuge, removes water to filter cake under centrifugal rotational speed is 4000-6000r/min
Pulverizing after C moisture content≤5%, gained ground product crosses 300-600 mesh sieve, prepares loaded calcium hydroxide activity carclazyte.
S8: the alkaline hargil that step S7 prepares is made into the solution that concentration is 4%-12%, adds alkalescence hargil quality 12%-
The serine of 30%, stirring reaction 75-120min under rotating speed 200-400r/min, prepare slurry material D；
S9: the slurry material D that step S8 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-45%
Filter cake D；
S10: the filter cake D that step S9 prepares is placed in centrifuge, removes water to filter under centrifugal rotational speed is 4000-6000r/min
Pulverizing after cake D moisture content≤5%, gained ground product crosses 200-500 mesh sieve, prepares novel environment friendly modified alta-mud PVC thermally-stabilised
Agent.
Below by more specifically embodiment, the present invention will be described.
Embodiment 1
A kind of novel environment friendly modified alta-mud PVC heat stabilizer, its preparation method comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 12% are mixed by weight for 2:12, under rotating speed is 400r/min
Stir, prepare pasty material A；
S2: joining in the inorganic mixed acid that concentration is 15% by the pasty material A that step S1 prepares, described inorganic mixed acid is
The mixed acid that the carbonic acid of concentration 22wt%, the oxalic acid of concentration 28wt%, the phosphoric acid 3:2:2 by volume of concentration 18wt% form, pulpous state
The weight ratio of material A and inorganic mixed acid is 2:10, adds the stirring of trisulfides sodium under rotating speed is 400r/min, trisulfides sodium with
The weight ratio of pasty material A is 2:120, is heated to 85 DEG C, is maintained at 85 DEG C reaction 2.5h, prepares pasty material B；
S3: the pasty material B that step S2 prepares is carried out under pressure is 0.92MPa filter pressing, and prepared moisture content is the filter cake of 40%
A；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 7 times of filter cake A weight, and filter cake A is complete for stirring and dissolving
Adding sodium polyacrylate stirring 0.9h after complete makes solution precipitate, and precipitate carries out under pressure is 0.92MPa filter pressing, prepares and contain
Water rate is the filter cake B of 38%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 6 times of filter cake B weight, and filter cake A is complete for stirring and dissolving
Quan Hou, adding concentration is the aqua calcis of 10%, prepares slurry material C；
S6: the slurry material C that step S5 prepares is carried out under pressure is 0.92MPa filter pressing, and prepared moisture content is the filter cake C of 39%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, removes water to filter cake C under centrifugal rotational speed is 5000r/min aqueous
Rate is pulverizing after 4%, and gained ground product is crossed 500 mesh sieves, prepared loaded calcium hydroxide activity carclazyte.
S8: the alkaline hargil that step S7 prepares is made into the solution that concentration is 8%, adds the silk ammonia of alkalescence hargil quality 20%
Acid, stirring reaction 100min under rotating speed 300r/min, prepare slurry material D；
S9: the slurry material D that step S8 prepares is carried out under pressure is 0.92MPa filter pressing, and prepared moisture content is the filter cake D of 40%；
S10: the filter cake D that step S9 prepares is placed in centrifuge, removes water to filter cake D under centrifugal rotational speed is 5000r/min and contain
Water rate is pulverizing after 3%, and gained ground product is crossed 400 mesh sieves, prepared novel environment friendly modified alta-mud PVC heat stabilizer.
Embodiment 2
A kind of novel environment friendly modified alta-mud PVC heat stabilizer, its preparation method comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 16% are mixed by weight for 2.2:14, is 500r/min at rotating speed
Under stir, prepare pasty material A；
S2: joining in the inorganic mixed acid that concentration is 20% by the pasty material A that step S1 prepares, described inorganic mixed acid is
The mixed acid that the carbonic acid of concentration 26wt%, the oxalic acid of concentration 32wt%, the phosphoric acid 5:4:3 by volume of concentration 20wt% form, pulpous state
Material A is 3.2:16 with the weight ratio of inorganic mixed acid, adds the stirring of trisulfides sodium, trisulfides sodium under rotating speed is 550r/min
It is 2:150 with the weight ratio of pasty material A, is heated to 93 DEG C, be maintained at 93 DEG C reaction 1.2h, prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out under pressure is 0.95MPa filter pressing, and prepared moisture content is the filter cake of 45%
A；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 7.5 times of filter cake A weight, stirring and dissolving filter cake A
Adding bodied ferric sulfate stirring 1.2h after completely makes solution precipitate, and precipitate carries out under pressure is 0.95MPa filter pressing, prepares
Moisture content is the filter cake B of 45%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 6.5 times of filter cake B weight, stirring and dissolving filter cake A
After Wan Quan, adding concentration is the aqua calcis of 12%, prepares slurry material C；
S6: the slurry material C that step S5 prepares is carried out under pressure is 0.95MPa filter pressing, and prepared moisture content is the filter cake C of 45%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, removes water to filter cake C under centrifugal rotational speed is 6000r/min aqueous
Rate is pulverizing after 5%, and gained ground product is crossed 600 mesh sieves, prepared loaded calcium hydroxide activity carclazyte.
S8: the alkaline hargil that step S7 prepares is made into the solution that concentration is 12%, adds the silk of alkalescence hargil quality 30%
Propylhomoserin, stirring reaction 75min under rotating speed 400r/min, prepare slurry material D；
S9: the slurry material D that step S8 prepares is carried out under pressure is 0.95MPa filter pressing, and prepared moisture content is the filter cake D of 45%；
S10: the filter cake D that step S9 prepares is placed in centrifuge, removes water to filter cake D under centrifugal rotational speed is 6000r/min and contain
Water rate is pulverizing after 5%, and gained ground product is crossed 500 mesh sieves, prepared novel environment friendly modified alta-mud PVC heat stabilizer.
Embodiment 3
A kind of novel environment friendly modified alta-mud PVC heat stabilizer, its preparation method comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 10% are mixed by weight for 1.6:10, is 200r/min at rotating speed
Under stir, prepare pasty material A；
S2: joining in the inorganic mixed acid that concentration is 11% by the pasty material A that step S1 prepares, described inorganic mixed acid is
The mixed acid that the carbonic acid of concentration 24wt%, the oxalic acid of concentration 30wt%, the phosphoric acid 4:3:3 by volume of concentration 18wt% form, pulpous state
The weight ratio of material A and inorganic mixed acid is 1:4, adds the stirring of trisulfides sodium under rotating speed is 200r/min, trisulfides sodium with
The weight ratio of pasty material A is 1:50, is heated to 82 DEG C, is maintained at 82 DEG C reaction 3.2h, prepares pasty material B；
S3: the pasty material B that step S2 prepares is carried out under pressure is 0.9MPa filter pressing, and prepared moisture content is the filter cake of 32%
A；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 6 times of filter cake A weight, and filter cake A is complete for stirring and dissolving
Adding acrylamide stirring 0.4h after complete makes solution precipitate, and precipitate carries out under pressure is 0.9MPa filter pressing, prepares aqueous
Rate is the filter cake B of 32%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 5 times of filter cake B weight, and filter cake A is complete for stirring and dissolving
Quan Hou, adding concentration is the aqua calcis of 8%, prepares slurry material C；
S6: the slurry material C that step S5 prepares is carried out under pressure is 0.9MPa filter pressing, and prepared moisture content is the filter cake C of 32%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, removes water to filter cake C under centrifugal rotational speed is 4000r/min aqueous
Rate is pulverizing after 4%, and gained ground product is crossed 300 mesh sieves, prepared loaded calcium hydroxide activity carclazyte.
S8: the alkaline hargil that step S7 prepares is made into the solution that concentration is 4%, adds the silk ammonia of alkalescence hargil quality 12%
Acid, stirring reaction 120min under rotating speed 200r/min, prepare slurry material D；
S9: the slurry material D that step S8 prepares is carried out under pressure is 0.9MPa filter pressing, and prepared moisture content is the filter cake D of 32%；
S10: the filter cake D that step S9 prepares is placed in centrifuge, removes water to filter cake D under centrifugal rotational speed is 4000r/min and contain
Water rate is pulverizing after 4%, and gained ground product is crossed 200 mesh sieves, prepared novel environment friendly modified alta-mud PVC heat stabilizer.
The water content of novel environment friendly modified alta-mud PVC heat stabilizer granule, Ca (OH) in embodiment 1-32Content, activity
Index, heat-stable time analysis result see table.
| Embodiment | Product moisture content (%) | Ca(OH)2Content/wt% | Activity index/% | Heat-stable time/min(180 ± 1 DEG C) |
| 1 | 3 | 41 | 98 | 153 |
| 2 | 5 | 43 | 99 | 158 |
| 3 | 4 | 42 | 97 | 156 |
As seen from the above table, alkaline bleaching clay product moisture content≤5% prepared by the present invention, Ca (OH)2Content is 41-43wt%,
Activity index is 97%-99%, and heat-stable time is 153-158min, it can be seen that, the novel environment friendly that present invention process produces changes
Property bentonite PVC heat stabilizer quality high and stable.
Above content it cannot be assumed that the present invention be embodied as be confined to these explanation, technology belonging to the present invention is led
For the those of ordinary skill in territory, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace,
All should be considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted to.
Claims (8)
1. a novel environment friendly modified alta-mud PVC heat stabilizer, it is characterised in that: described novel environment friendly modified alta-mud PVC
The preparation method of heat stabilizer comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 10%-16% are mixed by weight for 1.6-2.2:10-14, is turning
Speed, for stirring under 200-500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%-20%, described inorganic mixing
Acid is the phosphoric acid 3-5:2-4 by volume of the carbonic acid of concentration 22-26wt%, the oxalic acid of concentration 28-32wt%, concentration 18-20wt%:
The mixed acid of 2-3 composition, pasty material A is 1-3.2:4-16 with the weight ratio of inorganic mixed acid, is 200-550r/ at rotating speed
Adding the stirring of trisulfides sodium under min, trisulfides sodium is 1-2:50-150 with the weight ratio of pasty material A, is heated to 82-93 DEG C,
React 1.2-3.2h at being maintained at 82-93 DEG C, prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-
The filter cake A of 45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 6-7.5 times of filter cake A weight, stirring and dissolving filter
Cake A adds flocculant stirring 0.4-1.2h the most afterwards makes solution precipitate, and is pressed by precipitate under pressure is 0.9-0.95MPa
Filter, prepared moisture content is the filter cake B of 32%-45%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 5-6.5 times of filter cake B weight, and stirring and dissolving is filtered
After cake A is complete, add aqua calcis, prepare slurry material C；
S6: the slurry material C that step S5 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-45%
Filter cake C；
S7: the filter cake C that step S6 prepares is placed in centrifuge, removes water to filter cake under centrifugal rotational speed is 4000-6000r/min
Pulverizing after C moisture content≤5%, gained ground product sieves A, prepares loaded calcium hydroxide activity carclazyte.
2.S8: the alkaline hargil that step S7 prepares is made into the solution that concentration is 4%-12%, adds alkalescence hargil quality 12%-30%
Serine, under rotating speed 200-400r/min stirring reaction 75-120min, prepare slurry material D；
S9: the slurry material D that step S8 prepares is carried out under pressure is 0.9-0.95MPa filter pressing, and prepared moisture content is 32%-45%
Filter cake D；
S10: the filter cake D that step S9 prepares is placed in centrifuge, removes water to filter under centrifugal rotational speed is 4000-6000r/min
Pulverizing after cake D moisture content≤5%, gained ground product sieves B, prepares novel environment friendly modified alta-mud PVC heat stabilizer.
Novel environment friendly modified alta-mud PVC heat stabilizer the most according to claim 1, it is characterised in that institute in step S4
State flocculant and include the one in organic flocculant and inorganic flocculating agent.
Novel environment friendly modified alta-mud PVC heat stabilizer the most according to claim 3, it is characterised in that described organic wadding
Solidifying agent includes the one in sodium polyacrylate, calcium polyacrylate (CPA), acrylamide.
Novel environment friendly modified alta-mud PVC heat stabilizer the most according to claim 3, it is characterised in that described inorganic wadding
Solidifying agent includes the one in bodied ferric sulfate, polyaluminium sulfate.
Novel environment friendly modified alta-mud PVC heat stabilizer the most according to claim 1, it is characterised in that institute in step S5
Stating aqua calcis concentration is 8%-12%.
Novel environment friendly modified alta-mud PVC heat stabilizer the most according to claim 1, it is characterised in that institute in step S7
The mesh number stating sieve A is 300-600 mesh.
Novel environment friendly modified alta-mud PVC heat stabilizer the most according to claim 1, it is characterised in that institute in step S10
The mesh number stating sieve B is 200-500 mesh.
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| CN107488272A (en) * | 2017-07-28 | 2017-12-19 | 广西汇智生产力促进中心有限公司 | A kind of loaded calcium hydroxide activity carclazyte, preparation method and applications |
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| CN103965565A (en) * | 2013-12-05 | 2014-08-06 | 广西大学 | Supported PVC (polyvinyl chloride) heat stabilizer and preparation method thereof |
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| CN102557057A (en) * | 2011-12-28 | 2012-07-11 | 攀枝花学院 | Active argil and preparation method thereof |
| CN103965565A (en) * | 2013-12-05 | 2014-08-06 | 广西大学 | Supported PVC (polyvinyl chloride) heat stabilizer and preparation method thereof |
| CN105565331A (en) * | 2015-12-21 | 2016-05-11 | 罗永城 | Preparation method of alkaline porcelain clay |
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