CN114921034B - Reuse method and application of diatomite filter cake - Google Patents
Reuse method and application of diatomite filter cake Download PDFInfo
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- CN114921034B CN114921034B CN202210500268.6A CN202210500268A CN114921034B CN 114921034 B CN114921034 B CN 114921034B CN 202210500268 A CN202210500268 A CN 202210500268A CN 114921034 B CN114921034 B CN 114921034B
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- plasticizer
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000012065 filter cake Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000004014 plasticizer Substances 0.000 claims abstract description 43
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 40
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 36
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 239000010802 sludge Substances 0.000 claims abstract description 25
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 16
- 238000004064 recycling Methods 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 238000010074 rubber mixing Methods 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 238000004073 vulcanization Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000010298 pulverizing process Methods 0.000 claims abstract description 5
- 238000004513 sizing Methods 0.000 claims abstract description 5
- 239000005909 Kieselgur Substances 0.000 claims description 9
- 239000004808 2-ethylhexylester Substances 0.000 claims description 5
- KRADHMIOFJQKEZ-UHFFFAOYSA-N Tri-2-ethylhexyl trimellitate Chemical compound CCCCC(CC)COC(=O)C1=CC=C(C(=O)OCC(CC)CCCC)C(C(=O)OCC(CC)CCCC)=C1 KRADHMIOFJQKEZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 4
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 16
- 238000005452 bending Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 7
- 239000003292 glue Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/04—Plastics, rubber or vulcanised fibre
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/02—Copolymers with acrylonitrile
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses a recycling method and application of a diatomite filter cake, wherein the recycling method comprises the following steps: 1) Pretreatment of diatomite filter cake: putting the diatomite filter cake processed and used by the plasticizer into a pulverizer to carry out pulverizing treatment to obtain diatomite oil sludge; 2) Weighing the raw materials: respectively weighing the following raw materials, namely polyvinyl chloride resin, nitrile rubber, diatomite oil sludge, a heat stabilizer and a lubricant according to the formula amount; 3) Plasticating: conveying the raw materials into a rubber mixing machine for plasticating to obtain plasticated materials; 4) Vulcanizing: adding a vulcanizing agent into the mixed material on a flat vulcanizing machine for vulcanization mixing, and performing hot press molding to obtain the mixed material; 5) Slicing: cutting the mixed sizing material into slices to obtain the rubber sheet for the PVC sole. The application uses diatomite filter cake produced by plasticizer factory as main raw material to prepare PVC sole material, which can reuse dangerous chemical, fully and effectively, and produce high performance PVC sole material, with direct and remarkable economic benefit.
Description
Technical Field
The application relates to a recycling technology of waste hazardous materials in a plasticizer factory, in particular to a recycling method and application of a diatomite filter cake.
Background
The production process of the industrial plasticizer needs decolorization, refining and filtering adsorption operation processes, and the diatomite filter cake is a filtering adsorption process product in a plasticizer factory workshop, and comprises the following main components in mass percent: 20-50% of diatomite, 50-80% of plasticizer (DOA, DOS, DPHP, TOTM, etc.), and the balance of water, sodium salt (terephthalic acid, phthalic acid, adipic acid, etc.), water-washed catalyst products, etc. The diatomite mainly utilizes the adsorption capacity of the porous structure to physically adsorb the plasticizer, but has weak adsorption capacity, and is easy to desorb the plasticizer under the action of external force, so that the diatomite is inconvenient to store, transport and use. The used diatomite filter cake belongs to dangerous chemicals, and the main treatment mode of the national treatment mode of dangerous chemicals is incineration, and a large amount of waste gas substances are generated by the incineration, so that the environment is seriously polluted. How to reduce the solid waste discharge of plasticizer factories, change waste diatomite filter cakes into valuable, and effectively utilize the waste diatomite filter cakes is a technical problem to be solved in the field.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the application is to provide a recycling method of diatomite filter cakes. The application uses diatomite filter cake produced by plasticizer factory as main raw material to prepare PVC sole material with higher economic value, which not only re-uses dangerous chemical, fully and effectively, but also produces high-performance PVC sole material, with direct and obvious economic benefit.
The second purpose of the application is to provide the PVC sole glue prepared by the recycling method of the diatomite filter cake.
One of the purposes of the application is realized by adopting the following technical scheme: a recycling method of diatomite filter cakes comprises the following steps:
1) Pretreatment of diatomite filter cake:
putting the diatomite filter cake processed and used by the plasticizer into a pulverizer to carry out pulverizing treatment to obtain diatomite oil sludge;
2) Weighing the raw materials: respectively weighing the following raw materials, namely polyvinyl chloride resin, nitrile rubber, diatomite oil sludge, a heat stabilizer and a lubricant according to the formula amount;
3) Plasticating: conveying the raw materials into a rubber mixing machine for plasticating to obtain plasticated materials;
4) Vulcanizing: adding a vulcanizing agent into the mixed material on a flat vulcanizing machine for vulcanization mixing, and performing hot press molding to obtain the mixed material;
5) Slicing: cutting the mixed sizing material into slices to obtain the rubber sheet for the PVC sole.
Further, in the step 1), the diatomite oil sludge contains not less than 45% of diatomite and not less than 20% of plasticizer in the diatomite; the plasticizer contains at least one plasticizer of DOA, DOS, DPHP, TOTM.
Further, in step 2), the raw materials of the formula amount are as follows: 100 parts of polyvinyl chloride resin, 45-75 parts of nitrile rubber, 150-500 parts of diatomite oil sludge, 0.5-6 parts of heat stabilizer and 0-2 parts of lubricant.
Further, in step 2), the heat stabilizer is a mass ratio of 1: the mixture of calcium-zinc stabilizer and benzoate of (2-5). Further, in step 2), the lubricant is calcium stearate or paraffin wax.
Further, in the step 3), the temperature of the rubber mixing machine is 105-130 ℃ and the rubber mixing time is 20-40min.
Further, in the step 4), the molding temperature of the press vulcanizer is set to 115-155 ℃ and the molding pressure is set to 15-30MPa.
Further, in the step 4), the vulcanizing agent is dibenzoyl peroxide, and the adding amount of the vulcanizing agent is 5-8% of the weight of the raw materials.
The second purpose of the application is realized by adopting the following technical scheme: the PVC sole glue is prepared by the recycling method of the diatomite filter cake.
Compared with the prior art, the application has the beneficial effects that:
(1) The application uses diatomite filter cake produced by plasticizer factory as main raw material to prepare PVC sole material with higher economic value, which not only re-uses dangerous chemical, fully and effectively, but also produces high-performance PVC sole material, with direct and obvious economic benefit.
(2) PVC is a brittle material, so that when the material is made into a PVC sole, cracks are easy to generate during bending, and the porous structure of diatomite counteracts a part of internal stress among macromolecules in the process of vulcanizing and crosslinking polymers by adding diatomite oil sludge and nitrile rubber, so that the flexibility of the PVC material is improved, the brittleness of the PVC material is reduced, and the prepared sole is not easy to crack during bending, so that the bending strength and fracture toughness of the PVC sole are improved.
Detailed Description
The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the present application, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified.
A recycling method of diatomite filter cakes comprises the following steps:
1) Pretreatment of diatomite filter cake:
putting the diatomite filter cake processed and used by the plasticizer into a pulverizer to carry out pulverizing treatment to obtain diatomite oil sludge;
2) Weighing the raw materials: respectively weighing the following raw materials, namely polyvinyl chloride resin, nitrile rubber, diatomite oil sludge, a heat stabilizer and a lubricant according to the formula amount;
3) Plasticating: conveying the raw materials into a rubber mixing machine for plasticating to obtain plasticated materials;
4) Vulcanizing: adding a vulcanizing agent into the mixed material on a flat vulcanizing machine for vulcanization mixing, and performing hot press molding to obtain the mixed material;
5) Slicing: cutting the mixed sizing material into slices to obtain the rubber sheet for the PVC sole.
As a further preferable scheme, in the step 1), the diatomite oil sludge contains not less than 45% of diatomite and not less than 20% of plasticizer in diatomite; as the most preferable scheme, the content of the plasticizer in the diatomite is not less than 40% and not more than 50%; the plasticizer contains at least one plasticizer of DOA, DOS, DPHP, TOTM.
As a further preferred embodiment, in step 2), the formula amounts of raw materials are as follows: 100 parts of polyvinyl chloride resin, 45-75 parts of nitrile rubber, 150-500 parts of diatomite oil sludge, 0.5-6 parts of heat stabilizer and 0-2 parts of lubricant.
As a further preferred embodiment, in step 2), the formula amounts of raw materials are as follows: 100 parts of polyvinyl chloride resin, 55-65 parts of nitrile rubber, 250-380 parts of diatomite oil sludge, 2-4 parts of heat stabilizer and 0.5-1.5 parts of lubricant.
As a further preferable scheme, in the step 2), the heat stabilizer is a mass ratio of 1: the mixture of calcium-zinc stabilizer and benzoate of (2-5).
As a further preferred embodiment, in step 2), the lubricant is calcium stearate or paraffin wax.
As a further preferable scheme, in the step 3), the temperature of the rubber mixing machine is 105-130 ℃ and the rubber mixing time is 20-40min.
As a further preferable scheme, in the step 4), the molding temperature of the press vulcanizer is set to 115-155 ℃ and the molding pressure is set to 15-30MPa.
As a further preferable scheme, in the step 4), the vulcanizing agent is dibenzoyl peroxide, and the adding amount of the vulcanizing agent is 5-8% of the weight of the raw materials.
The application also provides PVC sole glue which is prepared by the recycling method of the diatomite filter cake.
The following are specific examples of the present application, in which raw materials, equipment, etc. used are available in a purchase manner except for specific limitations.
Examples 1 to 3 and comparative examples 1 to 6
The raw materials are weighed according to the proportion in the following table 1 respectively, the PVC sole glue is prepared according to the preparation method after the table 1, the PVC sole glue of different embodiments is correspondingly obtained, and the specific details are shown in the table 1:
TABLE 1 raw material ratios of examples 1-3 and comparative examples 1-6
Wherein, the heat stabilizer in the table 1 is mass ratio 1:1 with benzoate; the lubricant is calcium stearate; the diatomite content of the diatomite oil sludge of the example 1 is 45%, and the content of the plasticizer in the diatomite is 20%; the plasticizer is a mixed plasticizer containing DOA and TOTM. The diatomite content of the diatomite oil sludge of the example 2 is 46%, and the content of the plasticizer in the diatomite is 45%; the plasticizer is a mixed plasticizer containing DOA and DOS. The diatomite content of the diatomite oil sludge of example 3 is 45%, and the content of the plasticizer in the diatomite is 50%; the plasticizer is a mixed plasticizer containing DPHP and DOS.
The PVC sole gums of examples 1-3 and comparative examples 1-6 were prepared by a diatomaceous earth filter cake recycling method, comprising the steps of:
1) Pretreatment of diatomite filter cake:
putting the diatomite filter cake processed and used by the plasticizer into a pulverizer to carry out pulverizing treatment to obtain diatomite oil sludge;
2) Weighing the raw materials: respectively weighing the following raw materials, namely polyvinyl chloride resin, nitrile rubber, diatomite oil sludge, a heat stabilizer and a lubricant according to the formula amount of the table 1;
3) Plasticating: conveying the raw materials into a rubber mixing machine for plasticating to obtain plasticated materials; the temperature of the rubber mixing machine is 120 ℃, and the rubber mixing time is 30min.
4) Vulcanizing: adding a vulcanizing agent into the mixed material on a flat vulcanizing machine for vulcanization mixing, and performing hot press molding to obtain the mixed material; the vulcanizing agent is dibenzoyl peroxide, and the adding amount of the vulcanizing agent is 6% of the weight of the raw material; the molding temperature of the press vulcanizer is set to 135 ℃ and the molding pressure is set to 25MPa.
5) Slicing: cutting the mixed sizing material into slices to obtain the rubber sheet for the PVC sole.
Comparative example 1
The preparation process of comparative example 1 was carried out without adding diatomite oil sludge, and the other steps and conditions were basically the same as those of example 2.
Comparative example 2
The procedure and conditions for the preparation of comparative example 2 were essentially the same as those used in example 2 without the addition of nitrile rubber.
Comparative example 3
The procedure and conditions for the preparation of comparative example 3 were essentially the same as those used in example 2, except that no nitrile rubber was added and the polyurethane rubber was used instead of nitrile rubber.
Comparative example 4
The procedure and conditions of the preparation process of comparative example 4 were substantially the same as in example 2, except that the diatomaceous earth slurry of step (1) had a diatomaceous earth content of 55% and a plasticizer content of 10% in diatomaceous earth; the plasticizer is a mixed plasticizer containing DOA and DOS.
Comparative example 5
The procedure and conditions of the preparation process of comparative example 5 are substantially the same as those of example 2, except that the diatomite oil sludge of step (1) has a diatomite content of 25% and a plasticizer content of 55% in the diatomite; the plasticizer is a mixed plasticizer containing DOA and DOS.
Comparative example 6
The procedure and conditions of the preparation process of comparative example 6 were substantially the same as in example 2, except that the diatomaceous earth slurry of step (1) had a diatomaceous earth content of 25% and a plasticizer content of 10% in diatomaceous earth; the plasticizer is a mixed plasticizer containing DOA and DOS.
Effect evaluation and Performance detection
1. The properties of the PVC soles prepared in examples 1 to 3, such as flexural strength and fracture toughness, were examined, and the examination items and results are shown in Table 1. Wherein, the bending strength is measured according to the steps in GB/9341-2000 plastic bending property test method; fracture toughness Plastic-fracture toughness (G) according to ISO-13586-2018 IC And K IC ) Is measured by the procedure of the method of Linear Elastic Fracture Mechanics (LEFM).
Table 2 shows the product performance test data for each example
As shown in the table above, examples 1-3 have higher bending strength and fracture toughness than each comparative example, which demonstrates that the diatomite oil sludge and the nitrile rubber are combined to improve the bending resistance and fracture toughness of the PVC material; of these, example 2 had the highest flexural strength and fracture toughness, indicating that the formulation in example 2 was the most appropriate. PVC is a brittle material, so that when the material is made into a PVC sole, cracks are easy to generate during bending, and the porous structure of diatomite is added with diatomite oil sludge and nitrile rubber, so that partial internal stress among macromolecules is counteracted in the vulcanization crosslinking process of PVC and nitrile rubber polymers, the flexibility of the PVC material is improved, the brittleness of the PVC material is reduced, and the prepared sole is not easy to crack during bending, so that the bending strength and fracture toughness of the PVC sole are improved.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application as claimed.
Claims (5)
1. The reuse method of the diatomite filter cake is characterized by comprising the following steps of:
1) Pretreatment of diatomite filter cake:
putting the diatomite filter cake processed and used by the plasticizer into a pulverizer to carry out pulverizing treatment to obtain diatomite oil sludge; in the step 1), the diatomite oil sludge contains not less than 45% of diatomite and not less than 20% of plasticizer; the plasticizer contains at least one plasticizer of DOA, DOS, DPHP, TOTM;
2) Weighing the raw materials: respectively weighing the following raw materials, namely polyvinyl chloride resin, nitrile rubber, diatomite oil sludge, a heat stabilizer and a lubricant according to the formula amount; in step 2), the formula amount of raw materials is as follows: 100 parts of polyvinyl chloride resin, 45-75 parts of nitrile rubber, 150-500 parts of diatomite oil sludge, 0.5-6 parts of heat stabilizer and 0-2 parts of lubricant;
3) Plasticating: conveying the raw materials into a rubber mixing machine for plasticating to obtain plasticated materials;
4) Vulcanizing: adding a vulcanizing agent into the mixed material on a flat vulcanizing machine for vulcanization mixing, and performing hot press molding to obtain the mixed material; in the step 4), the molding temperature of the press vulcanizer is set to 115-155 ℃ and the molding pressure is set to 15-30Mpa; in the step 4), the vulcanizing agent is dibenzoyl peroxide, and the adding amount of the vulcanizing agent is 5-8% of the weight of the raw materials;
5) Slicing: cutting the mixed sizing material into slices to obtain the rubber sheet for the PVC sole.
2. The method for recycling diatomaceous earth cake according to claim 1, wherein in step 2), the heat stabilizer is a mixture of the components of the mass ratio 1: the mixture of calcium-zinc stabilizer and benzoate of (2-5).
3. The method of recycling a diatomaceous earth cake according to claim 1, wherein in step 2), the lubricant is calcium stearate or paraffin wax.
4. The method for recycling diatomite filter cake according to claim 1, wherein in step 3), the temperature of the rubber mixing mill is 105-130 ℃ and the rubber mixing time is 20-40min.
5. A PVC sole gum prepared by the method of recycling the diatomite filter cake of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210500268.6A CN114921034B (en) | 2022-05-10 | 2022-05-10 | Reuse method and application of diatomite filter cake |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210500268.6A CN114921034B (en) | 2022-05-10 | 2022-05-10 | Reuse method and application of diatomite filter cake |
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| Publication Number | Publication Date |
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| CN114921034A CN114921034A (en) | 2022-08-19 |
| CN114921034B true CN114921034B (en) | 2023-11-24 |
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Citations (5)
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|---|---|---|---|---|
| US6043318A (en) * | 1996-09-27 | 2000-03-28 | Hardiman; Christopher John | Nitrile rubber/polyvinyl chloride blends |
| CN103709557A (en) * | 2013-12-17 | 2014-04-09 | 中山联成化学工业有限公司 | Recycling method of waste diatomite filter cakes in plasticizer factory |
| CN107641222A (en) * | 2016-07-21 | 2018-01-30 | 镇江联成化学工业有限公司 | A kind of diatomite greasy filth recycles the method for producing new polyvinyl chloride auxiliary agent |
| CN111117010A (en) * | 2018-11-01 | 2020-05-08 | 中国石油化工股份有限公司 | Foamed rubber composition, vulcanized rubber, and preparation method and application thereof |
| CN112280207A (en) * | 2020-09-29 | 2021-01-29 | 温州市剑利鞋业有限公司 | Anti-crack sole and preparation process thereof |
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2022
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| US6043318A (en) * | 1996-09-27 | 2000-03-28 | Hardiman; Christopher John | Nitrile rubber/polyvinyl chloride blends |
| CN103709557A (en) * | 2013-12-17 | 2014-04-09 | 中山联成化学工业有限公司 | Recycling method of waste diatomite filter cakes in plasticizer factory |
| CN107641222A (en) * | 2016-07-21 | 2018-01-30 | 镇江联成化学工业有限公司 | A kind of diatomite greasy filth recycles the method for producing new polyvinyl chloride auxiliary agent |
| CN111117010A (en) * | 2018-11-01 | 2020-05-08 | 中国石油化工股份有限公司 | Foamed rubber composition, vulcanized rubber, and preparation method and application thereof |
| CN112280207A (en) * | 2020-09-29 | 2021-01-29 | 温州市剑利鞋业有限公司 | Anti-crack sole and preparation process thereof |
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