CN108912394B - Method for producing environment-friendly butyl reclaimed rubber through low-temperature desulfurization - Google Patents
Method for producing environment-friendly butyl reclaimed rubber through low-temperature desulfurization Download PDFInfo
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- CN108912394B CN108912394B CN201810890969.9A CN201810890969A CN108912394B CN 108912394 B CN108912394 B CN 108912394B CN 201810890969 A CN201810890969 A CN 201810890969A CN 108912394 B CN108912394 B CN 108912394B
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 86
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 title claims abstract description 38
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 12
- 230000023556 desulfurization Effects 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000011069 regeneration method Methods 0.000 claims abstract description 44
- 230000008929 regeneration Effects 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 17
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 12
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 12
- 239000012188 paraffin wax Substances 0.000 claims abstract description 9
- 238000007670 refining Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims description 20
- 230000003213 activating effect Effects 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 239000012190 activator Substances 0.000 abstract description 21
- 229920005549 butyl rubber Polymers 0.000 abstract description 13
- 239000002131 composite material Substances 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 230000003009 desulfurizing effect Effects 0.000 abstract description 2
- 150000003254 radicals Chemical class 0.000 description 9
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000013475 authorization Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000010059 sulfur vulcanization Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 229920000034 Plastomer Polymers 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011297 pine tar Substances 0.000 description 1
- 229940068124 pine tar Drugs 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 239000010891 toxic waste Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- 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
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/28—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic compounds containing nitrogen, sulfur or phosphorus
-
- 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
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/20—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with hydrocarbons or halogenated hydrocarbons
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- 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
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/26—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing carboxylic acid groups, their anhydrides or esters
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- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2323/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08J2323/22—Copolymers of isobutene; butyl rubber
-
- 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
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a method for producing environment-friendly butyl reclaimed rubber by low-temperature desulfurization, which comprises the steps of desulfurizing at low temperature by using an open mill, firstly, adjusting the roll distance of butyl rubber particles in the open mill to 0.1mm, uniformly adding the butyl rubber particles into the open mill at the roll temperature of 25-30 ℃, and carrying out thin pass for several times until the butyl rubber particles are wrapped for about 5 min; then adding the composite regeneration activator DM (M or NS)/SA into the butyl rubber compound according to the proportion of 1:1, repeatedly and uniformly mixing, adding paraffin hydrocarbon oil into the rubber compound until the rubber compound is bright and clean, and keeping the time for 5 min; conveying the mixed rubber material to an open mill with the roller spacing of 1.0mm and the regeneration temperature of 90 +/-5 ℃ for regeneration for 15min through a conveying belt; and (3) conveying the regenerated rubber material to a refiner, and refining the rubber material on the refiner until the rubber material is smooth and clean for 5min under the conditions that the roller temperature is 40 +/-5 ℃ and the roller spacing is less than 0.1 mm. The environment-friendly reclaimed rubber produced by low-temperature desulfurization has outstanding environment-friendly performance and mechanical property, and can save energy and reduce consumption.
Description
Technical Field
The invention relates to a method for producing environment-friendly butyl reclaimed rubber by low-temperature desulfurization, belonging to the field of reclaimed rubber preparation.
Background
The traditional regenerated rubber is produced by utilizing waste butyl rubber products, most of the waste butyl rubber products are desulfurized by adopting a dynamic desulfurizing tank at high temperature (200-320 ℃), an elastomer is changed into a plastomer, a large amount of toxic waste gas and waste water are generated in the high-temperature production process, the environment is seriously polluted, the body health of enterprise operators is particularly influenced, and cancers can be possibly caused in severe cases. In addition, the traditional process method has complex process, wastes a large amount of energy, pollutes the environment and needs to invest a large amount of capital to treat waste gas and waste water in the later period.
Disclosure of Invention
In order to overcome the defects of the traditional regeneration technology of the waste butyl rubber, the invention utilizes low-temperature desulfurization to produce the butyl reclaimed rubber, which can effectively reduce the generation of waste gas and waste water, wherein the key technology is to develop a regeneration activating agent capable of decomposing at low temperature and cutting off sulfide bonds such as S-C bonds and the like, so as to provide a method for producing environment-friendly butyl reclaimed rubber by low-temperature desulfurization.
The invention is realized by the following technical scheme, a method for producing environment-friendly butyl reclaimed rubber by low-temperature desulfurization comprises the following raw materials in parts by weight:
100 portions of waste butyl inner tube
2.0 to 3.5 portions of activating agent DM or M or NS
Stearic acid SA 2.0-3.5 parts
Paraffin hydrocarbon oil 1.0 part
The preparation method comprises the following steps:
step 1) screening: selecting waste butyl inner tubes, wherein the particle size is 5mm multiplied by 2 mm;
step 2) placing the waste butyl inner tube on an open mill to be thin-passed until the waste butyl inner tube is wrapped by a roller; adding activating agent DM or M or NS, stearic acid SA, mixing, adding paraffin hydrocarbon oil, refining at low temperature for 10-20min on an open mill for 30-40 times, refining to obtain reclaimed rubber sheet with smooth surface and uniform texture, and automatically cutting and weighing reclaimed rubber;
and 3) detecting the performance.
As the method for producing the environment-friendly butyl reclaimed rubber by low-temperature desulfurization, the temperature of low-temperature regeneration refining is 90 +/-5 ℃, and the time is 15 min. At the temperature, the activator can release a large amount of active free radicals to initiate the waste rubber powder to generate rubber active free radicals, namely, a large amount of cross-linked bonds and rubber molecular main chains in the waste rubber are broken, and the elastic rubber becomes plastic reclaimed rubber; after regeneration is finished, the free radical generated by the composite efficient regeneration activator can stop the activity of the rubber active free radical at 40 ℃, and the rebound of the Mooney viscosity of the regenerated rubber is effectively prevented.
The softening agent is paraffin hydrocarbon oil, so that the vulcanization can be smoothly carried out.
Compared with the traditional high-temperature dynamic waste rubber desulfurization regeneration method for butyl rubber, the butyl rubber is regenerated at low temperature, low-molecular substances with high pollution can not be generated, and the pollution to the environment is eliminated. The low-temperature regeneration process not only protects the main chain of the molecule from being damaged, but also can break the cross-linking bond and reserve the performance of the recycled waste rubber. The waste rubber is regenerated at low temperature, the defect that rubber free radicals are easy to agglomerate at high temperature is removed, the rubber molecule after chain breakage has small elastic recovery, and the Mooney viscosity is stable.
The invention has the beneficial effects that:
(1) the low-temperature regeneration of the butyl rubber can avoid environmental pollution. Compared with the traditional high-temperature dynamic waste rubber desulfurization regeneration method, the waste rubber powder is regenerated at the low temperature of 90 +/-5 ℃, low-molecular substances (mainly 18 polycyclic aromatic hydrocarbons) with high pollution are not generated, and the pollution to the environment is eliminated. See the attached table 1 for the influence of the variety and dosage of the regeneration activator on the regeneration temperature and the content of polycyclic aromatic hydrocarbon in the reclaimed rubber.
(2) The low-temperature regeneration process requires that the regeneration temperature of the activating agent is equal to the decomposition temperature of the activating agent and must be less than 100 ℃. The activator can decompose low molecular free radical at the temperature to terminate rubber free radical or crosslinking bond in rubber powder, and the temperature for decomposing free radical of the composite regenerated activator DM (M, NS)/SA is tested to be generally 90 +/-5 ℃, see attached table 1.
(3) The mechanical and technological properties of the butyl reclaimed rubber can be retained by low-temperature regeneration. The low-temperature regeneration process not only protects the main chain of the molecule from being damaged, but also can break the cross-linking bond and reserve the performance of the recycled waste rubber. The waste rubber is regenerated at low temperature, the defect that rubber free radicals are easy to agglomerate at high temperature is removed, the rubber molecule after chain breakage has small elastic recovery, and the Mooney viscosity is stable. See the attached table 2 for the influence of the variety and the dosage of the regeneration activator on the processing technology and the mechanical property of the regenerated rubber.
(4) Only when the environment-friendly softener paraffin hydrocarbon oil is added, the vulcanization of the vulcanization test piece by a sulfur vulcanization system can be ensured, and the other plant environment-friendly softeners pine tar and rosin can not be vulcanized by the sulfur vulcanization system.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The raw materials and the parts by weight are as follows:
butyl inner tube 100
Activator DM 2.5
Stearic acid SA 2.5
Paraffinic hydrocarbon oil 12.0
The composite efficient regeneration activating agent is prepared from an activating agent DM and stearic acid SA according to the mass ratio of 1:1, and the mass ratio of the activating agent DM to the stearic acid SA is 2.5 parts.
The preparation method comprises the following steps:
screening butyl inner tube particles with the size of 5mm multiplied by 2mm for regeneration; adjusting the roll spacing of the butyl inner tube particles to 0.1mm in an open mill, uniformly adding the butyl inner tube particles into the open mill at the roll temperature of 25-30 ℃, and performing thin passing for several times until the butyl inner tube particles wrap the roll, wherein the time is about 5 min; then adding a composite regeneration activating agent DM/SA according to the proportion of 1:1, repeatedly and uniformly pressing, and adding paraffin hydrocarbon oil into the rubber material until the rubber material is smooth and clean for 5 min; conveying the mixed rubber material to an open mill with the roller spacing of 1.0mm and the regeneration temperature of 90 +/-5 ℃ through a conveying belt for mixing for 15 min; and (3) conveying the regenerated rubber material to a refiner, and refining the rubber material on the refiner until the rubber material is smooth and clean for 5min under the conditions that the roller temperature is 40 +/-5 ℃ and the roller spacing is less than 0.1 mm. The refined rubber sheet has smooth surface and uniform texture, and is automatically cut and weighed to obtain the reclaimed rubber finished product. The test result shows that: the Mooney viscosity of the low-temperature reclaimed rubber is 54.51, the tensile strength is 7.67MPa, the elongation at break is 703.5 percent, and the total content of 18 polycyclic aromatic hydrocarbons is 18.3 mg/kg, and the performances can meet the performance indexes of the national standard ' reclaimed rubber (GB/T13460 & lt 2008) & gt and ' evaluation, authorization and restriction regulation of chemicals in European Union '. The influence of the variety and the dosage of the regeneration activator on the content of the polycyclic aromatic hydrocarbon in the butyl reclaimed rubber is shown in table 1; the influence of the variety and the dosage of the regeneration activator on the processing technology and the mechanical property of the butyl reclaimed rubber is shown in the table 2.
Example 2
The raw materials and the parts by weight are as follows:
butyl inner tube 100
Activator M2.5
Stearic acid SA 2.5
Paraffinic hydrocarbon oil 12.0
The composite efficient regeneration activating agent is prepared from a regeneration activating agent M and stearic acid SA according to the mass ratio of 1: 1.
The preparation method comprises the following steps:
screening butyl inner tube particles with the size of 5mm multiplied by 2mm for regeneration; adjusting the roll spacing of the butyl inner tube particles to 0.1mm in an open mill, uniformly adding the butyl inner tube particles into the open mill at the roll temperature of 25-30 ℃, and performing thin passing for several times until the butyl inner tube particles wrap the roll, wherein the time is about 5 min; then adding a composite regeneration activating agent M/SA according to the proportion of 1:1, repeatedly and uniformly refining, and adding paraffin hydrocarbon oil into the rubber material until the rubber material is smooth and clean for 5 min; conveying the mixed rubber material to an open mill with the roller spacing of 1.0mm and the regeneration temperature of 90 +/-5 ℃ through a conveying belt for mixing for 15 min; and (3) conveying the regenerated rubber material to a refiner, and refining the rubber material on the refiner until the rubber material is smooth and clean for 5min under the conditions that the roller temperature is 40 +/-5 ℃ and the roller spacing is less than 0.1 mm. The refined rubber sheet has smooth surface and uniform texture, and is automatically cut and weighed to obtain the reclaimed rubber finished product. The test result shows that: the Mooney viscosity of the low-temperature reclaimed rubber is 55.92, the tensile strength is 7.21MPa, the elongation at break is 677.2%, and the total content of 18 polycyclic aromatic hydrocarbons is 17.6 mg/kg, and the performances can meet the performance indexes of the national standard ' reclaimed rubber (GB/T13460 & lt 2008) & gt) and ' evaluation, authorization and restriction regulation of chemicals in European Union '. The influence of the variety and the dosage of the regeneration activator on the content of the polycyclic aromatic hydrocarbon in the butyl reclaimed rubber is shown in table 1; the influence of the variety and the dosage of the regeneration activator on the processing technology and the mechanical property of the butyl reclaimed rubber is shown in the table 2.
Example 3
The raw materials and the parts by weight are as follows:
butyl inner tube 100
Activator NS 2.5
Stearic acid SA 2.5
Paraffinic hydrocarbon oil 12.0
The composite efficient regeneration activator NS/SA consists of regeneration activators NS and SA, and is prepared according to the mass ratio of 1: 1.
The preparation method comprises the following steps: screening butyl inner tube particles with the size of 5mm multiplied by 2mm for regeneration; adjusting the roll spacing of the butyl inner tube particles to 0.1mm in an open mill, uniformly adding the butyl inner tube particles into the open mill at the roll temperature of 25-30 ℃, and performing thin passing for several times until the butyl inner tube particles wrap the roll, wherein the time is about 5 min; then adding the composite regeneration activator NS/SA into the butyl rubber compound according to the ratio of 1:1, repeatedly and uniformly mixing, adding paraffin hydrocarbon oil into the rubber compound until the rubber compound is smooth and clean, and keeping the time for 5 min; conveying the mixed rubber material to an open mill with the roller spacing of 1.0mm and the regeneration temperature of 90 +/-5 ℃ for regeneration for 15min through a conveying belt; and (3) conveying the regenerated rubber material to a refiner, and refining the rubber material on the refiner until the rubber material is smooth and clean for 5min under the conditions that the roller temperature is 40 +/-5 ℃ and the roller spacing is less than 0.1 mm. The refined rubber sheet has smooth surface and uniform texture, and is automatically cut and weighed to obtain the reclaimed rubber finished product. The test result shows that: the Mooney viscosity of the low-temperature reclaimed rubber is 51.32, the tensile strength is 6.96MPa, the elongation at break is 739.3 percent, and the total content of 18 polycyclic aromatic hydrocarbons is 10.9 mg/kg, and the performances can meet the performance indexes of the national standard ' reclaimed rubber (GB/T13460 & lt 2008) & gt and ' evaluation, authorization and restriction regulation of chemicals in European Union '. The influence of the variety and the dosage of the regeneration activator on the content of the polycyclic aromatic hydrocarbon in the butyl reclaimed rubber is shown in table 1; the influence of the variety and the dosage of the regeneration activator on the processing technology and the mechanical property of the butyl reclaimed rubber is shown in the table
TABLE 1 Effect of regeneration activator variety and dosage on polycyclic aromatic content in reclaimed butyl rubber
TABLE 2 Effect of variety and amount of regeneration activators on reclaimed rubber processing and mechanical Properties
TABLE 3 comparison of different regeneration processes for butyl rubber
Claims (1)
1. A method for producing environment-friendly butyl reclaimed rubber by low-temperature desulfurization is characterized by comprising the following steps: the raw materials and the parts by weight are as follows:
the preparation method comprises the following steps:
step 1) screening: selecting waste butyl inner tubes, wherein the particle size is 5mm multiplied by 2 mm;
step 2) placing the waste butyl inner tube on an open mill, adjusting the roller distance of the open mill to 0.1mm, and performing thin passing for several times at the roller temperature of 25-30 ℃ until the waste butyl inner tube is wrapped for 5 min; adding an activating agent M and stearic acid SA, uniformly mixing, and adding paraffin hydrocarbon oil until the rubber material is smooth and clean for 5 min; conveying the mixed rubber material to an open mill with the roller spacing of 1.0mm and the regeneration temperature of 90 +/-5 ℃ through a conveying belt for mixing for 15 min; conveying the regenerated rubber material to a refiner, refining the rubber material to be smooth and clean for 5min under the conditions that the roller temperature is 40 +/-5 ℃ and the roller spacing is less than 0.1mm, and then automatically cutting and weighing the regenerated rubber;
and 3) detecting the performance.
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| CN108219192A (en) * | 2018-01-11 | 2018-06-29 | 徐州工业职业技术学院 | A kind of method that low-temp desulfurization produces environmental friendly regenerated glue |
| CN108341991A (en) * | 2018-02-26 | 2018-07-31 | 徐州工业职业技术学院 | A kind of composite regenerated activator of scrap rubber efficient cryogenic |
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| CN108219192A (en) * | 2018-01-11 | 2018-06-29 | 徐州工业职业技术学院 | A kind of method that low-temp desulfurization produces environmental friendly regenerated glue |
| CN108341991A (en) * | 2018-02-26 | 2018-07-31 | 徐州工业职业技术学院 | A kind of composite regenerated activator of scrap rubber efficient cryogenic |
Non-Patent Citations (1)
| Title |
|---|
| Comparative study on the treatment of simulated brominated butyl rubber wastewater by using bipolar membrane electrodialysis (BMED) and conventional electrodialysis (ED);Yanxin Wei等;《Separation and Purification Technology》;20130321;164-169 * |
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