CN104903355B - The improved method of rubber is reclaimed from the clear natural rubber latex of glue - Google Patents
The improved method of rubber is reclaimed from the clear natural rubber latex of glue Download PDFInfo
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- CN104903355B CN104903355B CN201380056669.6A CN201380056669A CN104903355B CN 104903355 B CN104903355 B CN 104903355B CN 201380056669 A CN201380056669 A CN 201380056669A CN 104903355 B CN104903355 B CN 104903355B
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- potassium hydroxide
- latex
- membrane module
- gel resin
- retentate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/075—Concentrating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/075—Concentrating
- C08C1/08—Concentrating with the aid of creaming agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/075—Concentrating
- C08C1/10—Concentrating by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L17/00—Compositions of reclaimed rubber
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of improved method reclaiming rubber from the clear natural rubber latex of glue.Described method includes glue gel resin breast described in pretreatment, a membrane module or two membrane modules of continuous print are used to concentrate described glue gel resin breast and add potassium hydroxide or containing ammonium laurate and the solution of potassium hydroxide, the glue gel resin breast concentrated is processed alternatively by tetramethylthiuram disulfide (TMTD) and zinc oxide (ZnO) dispersion, the latex of this concentration is blended with fresh field latex, by centrifugal for this blend to obtain latex concentration thing.Described latex concentration thing is blended with fresh latex concentration thing and uses ammonia treatment further, to obtain final latex concentration thing.
Description
Technical field
The present invention relates to a kind of improved method reclaiming rubber from the clear natural rubber latex of glue.In particular it relates to
A kind of reclaim rubber from the clear natural rubber latex of glue and use membrane filtration and centrifugal separation technology to combine described rubber to turn
The improved method of chemical conversion latex concentration thing.
Background technology
The clear natural rubber latex of glue or glue gel resin breast as relate to by centrifugal described rubber latex is separated into concentrate and
Side-product in the technique of the concentrated natural rubber latex of glue gel resin breast produces.Glue gel resin breast generally only comprises about 5%
Dry rubber substance, and it is recovered usually used as the clear crepe rubber of glue (crepe rubber).
It is well known in the art that and sulphuric acid can be used to pass through to solidify from glue gel resin breast recovery rubber.Then rubber is being made
Before selling for the clear rubber of glue, the rubber of dried recovered out of doors.But, this freezing method the glue clear rubber tool obtained
There is inferior quality, because it comprises a high proportion of nonrubber composition carried secretly and acid content.The clear rubber of glue also has not
Good physical characteristic, including producing foul odour, this causes the economic worth of the clear rubber of glue low.Additionally, the method is also
Producing the sewage of highly acidic, if processing this sewage before being discharged into environment the most by rights, then it can
Cause the pollution to environment.
Also by the solidification using proteolytic enzyme to carry out glue gel resin breast, the enzyme catalysis wherein achieving glue gel resin breast takes off
Albumen.But this process is uneconomic, because it needs to use substantial amounts of enzyme, and relate in process deammoniation and
Acid coagulation step.
Therefore, there is a need in the art for a kind of method for reclaiming rubber from the clear natural rubber latex of glue to solve
State at least one in problem, or provide at a kind of replacement.
Summary of the invention
By according to the present invention from the clear natural rubber latex of glue reclaim rubber improved method solve the problems referred to above and its
Its problem, and achieve progress in the art.One advantage of the method according to the invention is by using membrane filtration
Combine with centrifugal separation technology and implement to reclaim rubber from the clear natural rubber latex of glue, and described rubber is changed into latex
Concentrate, thus decrease the needs that the acid cure for reclaiming rubber from the clear natural rubber latex of glue is solid.The of the present invention
Two advantages are the sewage that described method produces the quality with improvement, thus environment causes less pollution.
According to an embodiment of the invention, implement described method in the following manner.The first pretreatment of described method
Glue gel resin breast.Then pretreated glue gel resin breast is made to pass through membrane module repeatedly and add hydroxide at set intervals
Potassium or containing ammonium laurate and the solution of potassium hydroxide, to obtain retentate and penetrant.By described retentate with fresh
Field latex is blended and is centrifuged, to obtain latex concentration thing.Described latex concentration thing is entered with fresh latex concentration thing
One step is blended and uses ammonia treatment, to obtain final latex concentration thing.
According to certain embodiments of the present invention, described method further includes at retentate and fresh field latex
Process described by tetramethylthiuram disulfide (TMTD) and zinc oxide (ZnO) dispersion before the step being blended
Retentate.
According to another implementation of the invention, described method further includes at retentate and fresh field glue
Breast carries out second level concentration to described retentate before being blended.By making described retentate repeatedly by the second membrane module
And add other potassium hydroxide or the solution enforcement second level concentration containing ammonium laurate and potassium hydroxide, to obtain second
Retentate and the second penetrant.Alternatively the second retentate is carried out chemical treatment and controllably with fresh field latex
It is blended.The second blended retentate is centrifuged, to obtain latex concentration thing.Then by described latex concentration thing with fresh
Latex concentration thing further control to be blended, to obtain final latex concentration thing.
According to certain embodiments of the present invention, described method further includes at and makes described retentate by the second film group
With retentate described in potassium hydroxide or the solution pretreatment containing ammonium laurate and potassium hydroxide before part.
According to an embodiment of the invention, every 10 minutes to 30 minutes by described potassium hydroxide or containing lauric acid
The solution of ammonium and potassium hydroxide joins pretreated glue gel resin breast, until obtaining about 80 weight % to 90 weight %
Penetrant.
According to certain embodiments of the present invention, every 10 minutes to 30 minutes by described potassium hydroxide or containing lauric acid
The solution of ammonium and potassium hydroxide joins pretreated glue gel resin breast, until obtaining about 60 weight % to 70 weight %
Penetrant.Every 10 minutes to 30 minutes by other potassium hydroxide or containing ammonium laurate and the solution of potassium hydroxide
Join described retentate, until obtaining the second penetrant of about 40 weight % to 50 weight %.
According to certain embodiments of the present invention, the described solution containing ammonium laurate and potassium hydroxide comprises and has 1:1 ratio
The ammonium laurate of example and potassium hydroxide.
According to an embodiment of the invention, described method farther includes by membrane module is immersed in 2% to 5%
Hydrogen peroxide in carry out rinsing membrane module；Sodium hydroxide backwash with 1% to 2% or just rinsing membrane module；And with 1%
Nitric acid backwash to 2% or just rinsing membrane module.
Accompanying drawing explanation
Describe above and other advantage and the feature of the present invention in the following detailed description, and be shown in the following drawings:
Fig. 1 is the flow chart illustrating the single-stage method for concentration according to the present invention.
Fig. 2 is the flow chart illustrating the secondary concentration method according to the present invention.
Detailed description of the invention
According to the present invention, it is provided that by natural rubber latex being separated into the butterfat part rich in rubber and the clear part of glue
And concentrated natural rubber latex or glue gel resin breast, thus reclaim the side of rubber from the clear natural rubber latex of glue or glue gel resin breast
Method.Glue gel resin breast usually contains the dry rubber substance of about 5%.
Method according to an embodiment of the invention includes the step of pre-treating adhesive gel resin breast.
In an embodiment of the invention, with ammonia and potassium hydroxide pre-treating adhesive gel resin breast.Another embodiment party
In formula, with ammonia and the solution pre-treating adhesive gel resin breast containing ammonium laurate and potassium hydroxide.At one preferred embodiment
In, the ammonia with about 0.35% to 0.65% and the potassium hydroxide pre-treating adhesive gel resin breast of about 0.025% to 0.10%.?
Another preferred embodiment in, with about 0.35% to 0.65% ammonia and about 0.025% to 0.10% containing Laurel
The solution pre-treating adhesive gel resin breast of acid ammonium and potassium hydroxide.Preferably, described solution comprises the Laurel with 1:1 ratio
Acid ammonium and potassium hydroxide.
By simply ammonia and potassium hydroxide or ammonia and the solution containing ammonium laurate and potassium hydroxide being joined glue gel resin
Breast carrys out pre-treating adhesive gel resin breast.Then mixture is homogenized by such as stirring.Then to pretreated glue gel resin
Breast carries out first order concentration technology.
In first order concentration technology, glue gel resin breast is concentrated into the dry rubber content of about 11% to 13%.By making glue
Gel resin breast implements first order concentration technology by multitube membrane module repeatedly.Glue gel resin breast is made to pass through multitube by pump
Formula membrane module.The example of the pump that can use in the present invention includes but not limited to diaphragm type pump or centrifugal pump.For
For large-scale film device, preferably centrifugal pump.Multitube membrane module can be made up of any suitable material.?
One preferred embodiment in, it is made up of pottery, and preferably has the aperture of about 0.05 μ.
When glue gel resin breast is repeatedly by multitube membrane module, at set intervals by potassium hydroxide or containing ammonium laurate
Described glue gel resin breast is joined with the solution of potassium hydroxide.Preferably, every 10 minutes to 30 minutes by potassium hydroxide
Or the solution containing ammonium laurate and potassium hydroxide joins glue gel resin breast.In one preferred embodiment, each
Time interval by about 0.025% to 0.10% potassium hydroxide or about 0.025% to 0.10% containing ammonium laurate and hydroxide
The solution of potassium joins glue gel resin breast.The inlet pressure of multitube membrane module is set in about 2.5 bars to 4.5 bars
(2.5×105Pa to 4.5 × 105Pa).Preferably, transmembrane pressure is set in about 1.5 bars to 3.0 bars (1.5 × 105Pa
To 3.0 × 105Pa).The solution used in this step can be potassium hydroxide or molten containing ammonium laurate and potassium hydroxide
Liquid, and do not limit it for the solution identical with the solution used in the step of pre-treating adhesive gel resin breast.
Continue first order concentration technology, until acquisition about 60 weight % are to the milk surum of the clarification of 70 weight %.Will clarification
Milk surum as penetrant remove, leave retentate, described retentate be concentrate glue gel resin breast.
Before the glue gel resin breast concentrated carries out second level concentration technology, can use other potassium hydroxide or containing ammonium laurate
With the glue gel resin breast that the solution of potassium hydroxide processes retentate or concentration.The solution used in this step can be hydrogen-oxygen
Change potassium or containing ammonium laurate and the solution of potassium hydroxide, and do not limit it for in the step of pre-treating adhesive gel resin breast
The identical solution of solution used.Preferably, by about 0.025% to 0.10% potassium hydroxide or about 0.025% to 0.10%
The solution containing ammonium laurate and potassium hydroxide join concentration glue gel resin breast with process glue gel resin breast.
In the concentration technology of the second level, the glue gel resin breast of concentration is concentrated into further the dry rubber content of approximately more than 20%.
By making the glue gel resin breast of concentration implement second level concentration technology by the second multitube membrane module repeatedly.More than second
Tubular membrane component can be and the film of the same type of use in first order concentration technology, or it can be adapted at this
Any type used in technique.Make the glue gel resin breast of concentration by the second multitube membrane module by pump.Can be described
The example of the pump used in method includes but not limited to diaphragm type pump or centrifugal pump.For large-scale film device,
Preferably centrifugal pump.Multitube membrane module can be made up of any suitable material.It is preferable to carry out of the present invention
In mode, multitube membrane module is made up of pottery, and has the aperture of about 0.05 μ.It has about 3.0mm to 4.0mm
Channel internal diameter and the total length of about 1.0m to 1.2m.
Preferably, make concentration glue gel resin breast at about 2.5 bars to 4.5 bars (2.5 × 105Pa to 4.5 × 105Pa) entrance
By the second multitube membrane module under pressure.At set intervals by other potassium hydroxide or containing ammonium laurate and hydrogen-oxygen
The solution changing potassium joins the glue gel resin breast of concentration, to enter when glue gel resin breast is repeatedly by the second multitube membrane module
One step concentrates glue gel resin breast.In one preferred embodiment, every 10 minutes to 30 minutes by potassium hydroxide or
Solution containing ammonium laurate and potassium hydroxide joins the glue gel resin breast of concentration.Preferably, will about in each time interval
The potassium hydroxide of 0.025% to 0.10% or the solution containing ammonium laurate and potassium hydroxide of about 0.025% to 0.10% add
To described glue gel resin breast.Potassium hydroxide can be used in this step or containing ammonium laurate and the solution of potassium hydroxide, and
Do not limit it for the solution identical with the solution used in the step of pre-treating adhesive gel resin breast.
Continue second level concentration technology, until obtaining the second milk surum of the clarification of about 40 weight % to 50 weight %.Will
Second milk surum of clarification removes as the second penetrant, leaves the second retentate, and described retentate is to concentrate further
Glue gel resin breast.
Before the field latex that the glue gel resin that will concentrate further is newborn Yu fresh is blended, can be alternatively with having 30%
Concentration, the tetramethylthiuram disulfide (TMTD) with 1:1 ratio and zinc oxide (ZnO) dispersion process
The glue gel resin breast concentrated further.Preferably, with the TMTD/ZnO dispersion of about 0.05 weight % to 0.10 weight %
Body processes the glue gel resin breast concentrated further.Matter according to the glue gel resin concentrated the further breast obtained after concentration technology
Amount (such as, volatile fatty acid is at the content in the glue gel resin Ruzhong concentrated further) implements this step.Preferably,
This step is implemented when the volatile fatty acid number in the glue gel resin Ruzhong concentrated further is more than 0.10.Preferably, at inciting somebody to action
The field latex that the glue gel resin of the concentration managed is newborn Yu fresh is blended in the ratio of 1 part: 9 parts.
Then the glue gel resin breast of the concentration being blended containing fresh field latex is centrifuged, to obtain latex concentration thing.
Latex concentration thing is blended in the ratio of 1 part: 9 parts with fresh latex concentration thing.Then ammonia is joined blended glue
Breast concentrate is to more than 0.60%m/m, to obtain final latex concentration thing.Thus obtained final latex concentration
Thing contains the dry rubber substance more than 60%.
In yet another embodiment of the present invention, according to the feedstock quality used in the method, the first order concentrates work
Skill and second level stage concentration technology can be implemented in a single step.
In single stage process, with ammonia and potassium hydroxide or with ammonia and the solution containing ammonium laurate and potassium hydroxide to glue gel resin
Breast carries out the pretreatment being similar to.In one preferred embodiment, the ammonia and about 0.025% of about 0.35% to 0.65% is used
To the potassium hydroxide pre-treating adhesive gel resin breast of 0.10%.Another preferred embodiment in, with about 0.35% to
The ammonia of 0.65% and the breast of the solution pre-treating adhesive gel resin containing ammonium laurate and potassium hydroxide of about 0.025% to 0.10%.Excellent
Selection of land, the solution containing ammonium laurate and potassium hydroxide has the ratio of 1:1.
By simply ammonia and potassium hydroxide or ammonia and the solution containing ammonium laurate and potassium hydroxide being joined glue gel resin breast
Carry out pre-treating adhesive gel resin breast.Then mixture is homogenized by such as stirring.Then to pretreated glue gel resin breast
Implement single-stage concentration technology.
According to this embodiment of the present invention, by making glue gel resin breast implement single-stage by multitube membrane module repeatedly
Concentration technology.Make glue gel resin breast by multitube membrane module by pump.The example bag of the pump that can use in the process
Include but be not limited to diaphragm type pump or centrifugal pump.For large-scale film device, preferably centrifugal pump.Multitube
Membrane module can be made up of any suitable material.One of the present invention preferred embodiment in, multitube film group
Part is made up of pottery, and has the aperture of about 0.05 μ.It has about 3.0mm to 4.0mm channel internal diameter and
The total length of about 1.0m to 1.2m.
When glue gel resin breast is repeatedly by multitube membrane module, by potassium hydroxide or containing ammonium laurate and potassium hydroxide
Solution joins described glue gel resin breast.At set intervals by potassium hydroxide or containing ammonium laurate and the solution of potassium hydroxide
Join glue gel resin breast.Preferably, every 10 minutes to 30 minutes by potassium hydroxide or containing ammonium laurate and hydroxide
The solution of potassium joins glue gel resin breast.In one preferred embodiment, each time interval will about 0.025% to
The potassium hydroxide of 0.10% or the solution containing ammonium laurate and potassium hydroxide of about 0.025% to 0.10% add glue gel resin breast
In.The inlet pressure of film is set in about 2.5 bars to 4.5 bars (2.5 × 105Pa to 4.5 × 105Pa).At one preferably
Embodiment in, for optimum penetrant flux, transmembrane pressure is set in about 1.5 to 3.0 bars (1.5 × 105
Pa to 3.0 × 105Pa)。
Continue single-stage concentration technology, until acquisition about 80 weight % are to the milk surum of the clarification of 90 weight %.By clarification
Milk surum removes as penetrant, leaves retentate, and described retentate is the glue gel resin breast concentrated.
Can be alternatively with there is the concentration of 30%, there is the glue that the TMTD/ZnO dispersion process of 1:1 ratio concentrates
Gel resin breast.Preferably, the glue concentrated is processed by the TMTD/ZnO dispersion of about 0.05 weight % to 0.10 weight %
Gel resin breast.(such as, volatile fatty acid is dense for the quality of the glue gel resin breast according to the concentration obtained after concentration technology
The content in the glue gel resin Ruzhong of contracting) implement this step.Preferably, when the volatile fatty acid in the glue gel resin Ruzhong concentrated
This step is implemented when value is more than 0.10.Then by field latex newborn Yu fresh for the glue gel resin of the concentration processed preferably
It is blended in the ratios of 1 part: 9 parts.
The glue gel resin breast of the concentration being blended containing fresh field latex is centrifuged, to obtain latex concentration thing.Then
Latex concentration thing is blended in the ratio of 1 part: 9 parts with fresh latex concentration thing.It is subsequently adding ammonia to more than 0.60%
M/m, to obtain final latex concentration thing.Thus obtained final latex concentration thing contains the dry rubber more than 60%
Glue.
The solution of ammonium laurate mentioned above and potassium hydroxide can contain any proper amount of ammonium laurate and hydroxide
Potassium.In one preferred embodiment, described solution comprises ammonium laurate and the potassium hydroxide with 1:1 ratio.
In the present invention, the milk surum of the clarification produced in glue gel resin breast concentration technology may be used in known in the art
Appropriate method reclaims the valuable biochemical being included in.Film becomes contaminated after a procedure.Can
Contaminated film is cleaned by being immersed in the hydrogen peroxide of about 2% to 5%, and by the hydroxide of about 1% to 2%
Sodium backwash or just rinsing.Can also be with nitric acid backwash or just rinsing contaminated film, to remove mineral contaminants regeneration membrane
For further using.Preferably, use the nitric acid backwash of about 1% to 2% or just rinsing contaminated film.
In method according to the embodiment of the present invention, field latex newborn Yu fresh for glue gel resin is being blended and weight
Newly it is centrifuged back before being latex concentration thing, concentrates glue gel resin breast by membranous system.As concentrating the newborn means of glue gel resin
The use of film eliminates the needs that the acid cure for reclaiming rubber from glue gel resin breast is solid.This also contributes to improve by described side
The quality of the sewage that method produces.The combination of chemical substance can be used to clean contaminated film so that its regeneration is for follow-up
Concentration.The recovery of rubber and to convert it into latex concentration thing be value-added technique for rubber industry.
It is favourable for using potassium hydroxide in the present invention, because potassium hydroxide serves latex stabilizer and latex anticorrosion
The effect of agent.This also stirring to being caused by any suitable mechanical means provide more preferable shear resistant.
Provide following example to further illustrate and to describe the specific detailed description of the invention of the present invention and real below
Execute example to be interpreted never in any form to limit the invention to concrete steps described herein, condition or composition.
Embodiment
Embodiment 1: secondary concentration technique
Sieved by the glue gel resin breast of the 60 mesh metal gauzes dry rubber content to having 5%, and with 0.65%
Ammonia and the potassium hydroxide pretreatment of 0.1%.Then make the glue gel resin breast processed repeatedly by multitube membrane module.?
The multitube membrane module used in the present embodiment has the aperture of about 0.05 μ, the channel internal diameter of about 3.0mm to 4.0mm
Total length with 1.0m to 1.2m.The inlet pressure of membrane module is set in about 3 bars (3 × 105Pa).Every 30
Minute the potassium hydroxide of about 0.05% is joined glue gel resin breast, thus concentrates glue gel resin breast.
Continue this concentration step, until acquisition about 60 weight % are to the milk surum of the clarification of 70 weight %, and as
First penetrant removes, and leaves the first retentate of the dry rubber substance containing about 11%.
Then with other 0.1% potassium hydroxide treatment the first retentate.Then make the first retentate processed about
3 bars (3 × 105Pa) repeatedly by the second multitube membrane module under inlet pressure.Every 30 minutes by about 0.05%
Potassium hydroxide join the first retentate, thus concentrate glue gel resin breast further.Carry out further concentration step,
Until obtaining the second milk surum of the clarification of about 40 weight % to 50 weight % and removing as the second penetrant.?
The second retentate containing the dry rubber substance more than 20% is also obtain after second concentration step.
Then before the second retentate is blended in the ratio of 1 part: 9 parts with fresh field latex, with about 0.05%
TMTD/ZnO (in the ratio of 1:1) dispersion (concentration of 30%) process the second retentate.Then, use
The skimming screw element (skim screw) (No. 12 or 12.5mm length) selected is to being blended containing fresh field latex
Retentate be centrifuged, to obtain latex concentration thing.Then by dense with fresh latex for the latex concentration thing that processed
Contracting thing is blended further in the ratio of 1 part: 9 parts, and by ammonification to more than 0.60%m/m ammonia, to obtain final glue
Breast concentrate.
The final latex concentration thing obtained by this technique has the quality suitable with common fresh latex concentrate.
This is a birth process in rubber industry, because compared with being recovered and converted to the clear crepe rubber of glue with by glue gel resin breast, from
Glue gel resin breast reclaims rubber and converts it into latex concentration thing and fetch better price.
Embodiment 2: secondary concentration technique
Sieved by the glue gel resin breast of the 60 mesh metal gauzes dry rubber content to having 5%, and with 0.65%
Ammonia and 0.1% the solution containing the ammonium laurate and potassium hydroxide with 1:1 ratio carry out pretreatment.Then make to process
Glue gel resin breast repeatedly by multitube membrane module.The multitube membrane module used in the present embodiment has about 0.05 μ
Aperture, the channel internal diameter of about 3.0mm to 4.0mm and the total length of 1.0m to 1.2m.By the entrance of membrane module
Pressure is set in about 3 bars (3 × 105Pa).Every 30 minutes, ammonium laurate and the potassium hydroxide of about 0.05% are joined
Glue gel resin breast, thus concentrate glue gel resin breast.
Continue this concentration step, until acquisition about 60 weight % are to the milk surum of the clarification of 70 weight %.Breast by clarification
Remove as the first penetrant clearly, leave the first retentate of the dry rubber substance containing about 11%.
Then the first retentate is processed with the solution containing ammonium laurate and potassium hydroxide of other 0.1%.Then process is made
The first retentate crossed is at about 3 bars (3 × 105Pa) repeatedly by the second multitube membrane module under inlet pressure.Often
Every 30 minutes, ammonium laurate and the potassium hydroxide of about 0.05% are joined the first retentate, thus it is clear to concentrate glue further
Latex.Carry out further concentration step, until obtaining the second milk surum of the clarification of about 40 weight % to 50 weight %.
Second milk surum of clarification is removed as the second penetrant.Also obtain after the second concentration step containing more than 20%
Second retentate of dry rubber substance.
Then before the second retentate is blended in the ratio of 1 part: 9 parts with fresh field latex, with about 0.05%
TMTD/ZnO (in the ratio of 1:1) dispersion (concentration of 30%) process the second retentate.Then, use
The skimming screw element (skim screw) (No. 12 or 12.5mm length) selected is to being blended containing fresh field latex
Retentate be centrifuged, to obtain latex concentration thing.Then by dense with fresh latex for the latex concentration thing that processed
Contracting thing is blended further in the ratio of 1 part: 9 parts, and by ammonification to more than 0.60%m/m ammonia, to obtain final glue
Breast concentrate.
The final latex concentration thing obtained by this technique has the quality suitable with common fresh latex concentrate.
Embodiment 3: single-stage concentration technology
In this single stage process, glue gel resin breast is implemented only one concentration step.Except continuing the list in this single stage process
Concentration step, until obtaining about 80 weight % to the milk surum of the clarification of 90 weight % and to remove it as penetrant
Outward, the Secondary process class described in pre-treatment step in the process and operating condition and embodiment 1 and embodiment 2
Seemingly.The retentate obtained in this single stage process contains the dry rubber substance more than 20%.
After concentration step, before retentate is blended in the ratio of 1 part: 9 parts with fresh field latex, use
TMTD/ZnO (in the ratio of the 1:1) dispersion (concentration of 30%) of about 0.05% processes and obtains from concentration step
Retentate.Then, use the skimming screw element (skim screw) (No. 12 or 12.5mm length) selected to containing
The retentate being blended of fresh field latex is centrifuged, to obtain latex concentration thing.Then the latex that will process
Concentrate and fresh latex concentration thing are blended further in the ratio of 1 part: 9 parts, and by ammonification to more than 0.60%m/m
Ammonia, to obtain final latex concentration thing.
The final latex concentration thing obtained by this single stage process have with common fresh latex concentrate and with by such as
The quality that latex concentration thing that above-mentioned secondary process obtains is suitable.
It is above the description of the subject of the present invention that inventor is thought, and it is believed that based on disclosure above,
Other people can and will the design packet system of replacement containing the present invention.
Claims (20)
1. by natural rubber latex is separated into rubber latex and glue gel resin breast and a concentrated natural rubber latex, from
And the method reclaiming rubber from glue gel resin breast, described method includes:
With glue gel resin breast described in ammonia and potassium hydroxide or ammonia and the solution pretreatment containing ammonium laurate and potassium hydroxide；
Make described pretreated glue gel resin breast repeatedly by membrane module and every 10 minutes to 30 minutes addition hydrogen-oxygens
Change potassium or containing ammonium laurate and the solution of potassium hydroxide, to obtain retentate and penetrant；
Described retentate is blended with fresh field latex；
Described blended retentate is centrifuged, to obtain latex concentration thing；
Described latex concentration thing is blended with fresh latex concentration thing；With
With described in ammonia treatment be blended after latex concentration thing, to obtain final latex concentration thing.
Method the most according to claim 1, farther includes:
Before the step described retentate and fresh field latex being blended, use tetramethylthiuram disulfide
(TMTD) and zinc oxide (ZnO) dispersion process described retentate.
Method the most according to claim 1, farther includes:
Before the step described retentate and fresh field latex being blended, make described retentate repeatedly by the
Two membrane modules also added other potassium hydroxide or molten containing ammonium laurate and potassium hydroxide every 10 minutes to 30 minutes
Liquid, to obtain the second retentate and the second penetrant.
Method the most according to claim 3, farther includes:
Described second retentate is processed by tetramethylthiuram disulfide (TMTD) and zinc oxide (ZnO) dispersion.
Method the most according to claim 3, farther includes:
Before by described retentate by described second membrane module, with potassium hydroxide or containing ammonium laurate and potassium hydroxide
Solution pretreatment described in retentate.
Method the most according to claim 1, wherein, every 10 minutes to 30 minutes by described potassium hydroxide or
Solution containing ammonium laurate and potassium hydroxide joins described pretreated glue gel resin breast, until obtaining 80 weight % extremely
The described penetrant of 90 weight %.
Method the most according to claim 3, wherein, every 10 minutes to 30 minutes by described potassium hydroxide or
Solution containing ammonium laurate and potassium hydroxide joins described pretreated glue gel resin breast, until obtaining 60 weight % extremely
The described penetrant of 70 weight %.
Method the most according to claim 7, wherein, every 10 minutes to 30 minutes by described other hydrogen-oxygen
Change potassium or the solution containing ammonium laurate and potassium hydroxide joins described retentate, until obtaining 40 weight % to 50 weights
Described second penetrant of amount %.
Method the most according to claim 1, wherein, with the ammonia and 0.025 of 0.35 weight % to 0.65 weight %
Weight % to 0.1 weight % potassium hydroxide pretreatment described in glue gel resin breast.
Method the most according to claim 1, wherein, with the ammonia and 0.025 of 0.35 weight % to 0.65 weight %
Weight % is to glue gel resin breast described in solution pretreatment containing ammonium laurate and potassium hydroxide described in 0.1 weight %.
11. according to the method for claim 1,3,5 or 10, wherein said containing ammonium laurate with the solution of potassium hydroxide
Comprise ammonium laurate and the potassium hydroxide with 1:1 ratio.
12. methods according to claim 1, wherein said membrane module is multitube film.
13. methods according to claim 12, wherein said membrane module has 2.5 × 105Pa to 4.5 × 105Pa
In the range of inlet pressure.
14. methods according to claim 3, wherein said second membrane module is multitube film.
15. methods according to claim 14, wherein said second membrane module has 2.5 × 105Pa to 4.5 × 105
Inlet pressure in the range of Pa.
16. methods according to claim 3, wherein said second retentate and the measurer of described fresh field latex
There is the ratio of 1:9.
17. methods according to claim 12, wherein said multitube membrane module includes diaphragm type pump or centrifugal type
Pump.
18. methods according to claim 14, wherein said second multitube membrane module include diaphragm type pump or from
Cardioid pump.
19. methods according to claim 1, farther include:
By the described membrane module of following cleaning:
Described membrane module is immersed in the hydrogen peroxide of 2% to 5%；
Sodium hydroxide backwash with 1% to 2% or just rinsing described membrane module；With
Nitric acid backwash with 1% to 2% or just rinsing described membrane module, to regenerate described membrane module for further
Use.
20. methods according to claim 3, farther include:
By described second membrane module of following cleaning:
Described second membrane module is immersed in the hydrogen peroxide of 2% to 5%；
Sodium hydroxide backwash with 1% to 2% or just rinsing described membrane module；With
Nitric acid backwash with 1% to 2% or just rinsing described membrane module, to regenerate described membrane module for further
Use.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI2012700834 | 2012-10-29 | ||
| MYPI2012700834A MY183968A (en) | 2012-10-29 | 2012-10-29 | An improved method of recovering rubber from skim natural rubber latex |
| PCT/MY2013/000070 WO2014069979A1 (en) | 2012-10-29 | 2013-04-01 | An improved method of recovering rubber from skim natural rubber latex |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104903355A CN104903355A (en) | 2015-09-09 |
| CN104903355B true CN104903355B (en) | 2016-11-23 |
Family
ID=48446577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380056669.6A Expired - Fee Related CN104903355B (en) | 2012-10-29 | 2013-04-01 | The improved method of rubber is reclaimed from the clear natural rubber latex of glue |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN104903355B (en) |
| HK (1) | HK1210485A1 (en) |
| MY (1) | MY183968A (en) |
| PH (1) | PH12015500908A1 (en) |
| WO (1) | WO2014069979A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY173398A (en) * | 2015-06-18 | 2020-01-22 | Sime Darby Plantation Berhad | A process and system for concentrating epoxidized natural rubber latex into epoxidized natural rubber latex concentrate |
| CN109369826B (en) * | 2018-09-21 | 2020-08-21 | 昌江金达乳胶制品有限公司 | Production method of ammonia-free natural concentrated latex |
| CN113385035A (en) * | 2021-06-09 | 2021-09-14 | 海南天然橡胶产业集团股份有限公司 | Automatic colloidal-clear concentration system and concentration method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB739750A (en) * | 1953-10-02 | 1955-11-02 | Firestone Tire & Rubber Co | Improvements in or relating to high grade rubber and method of making same |
| GB1464462A (en) * | 1974-04-22 | 1977-02-16 | Firestone Tire & Rubber Co | Process for producing concentrated latex |
| WO2005007703A1 (en) * | 2003-07-21 | 2005-01-27 | B.C. Sekhar Sdn Bhd | Method of producing deproteinised natural rubber in solid and latex form |
| CN101842421A (en) * | 2007-08-30 | 2010-09-22 | 卡伯特公司 | An elastomer composite and method for producing it |
-
2012
- 2012-10-29 MY MYPI2012700834A patent/MY183968A/en unknown
-
2013
- 2013-04-01 CN CN201380056669.6A patent/CN104903355B/en not_active Expired - Fee Related
- 2013-04-01 WO PCT/MY2013/000070 patent/WO2014069979A1/en active Application Filing
-
2015
- 2015-04-23 PH PH12015500908A patent/PH12015500908A1/en unknown
- 2015-11-13 HK HK15111223.9A patent/HK1210485A1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB739750A (en) * | 1953-10-02 | 1955-11-02 | Firestone Tire & Rubber Co | Improvements in or relating to high grade rubber and method of making same |
| GB1464462A (en) * | 1974-04-22 | 1977-02-16 | Firestone Tire & Rubber Co | Process for producing concentrated latex |
| WO2005007703A1 (en) * | 2003-07-21 | 2005-01-27 | B.C. Sekhar Sdn Bhd | Method of producing deproteinised natural rubber in solid and latex form |
| CN101842421A (en) * | 2007-08-30 | 2010-09-22 | 卡伯特公司 | An elastomer composite and method for producing it |
Non-Patent Citations (2)
| Title |
|---|
| Effect of field natural rubber latex with different ammonia contents and storage period on physical properties of latex concentrate, stability of skim latex and dipped film;Sirinapa Santipanusopona, et al.;《Physics Procedia》;20090701;第2卷(第1期);第127-134页 * |
| Evaluating the use of in-situ ultrasonication to reduce fouling during natural rubber skim latex (waste latex) recovery by ultrafiltration;D. Veerasamy,et al.;《Desalination》;20090131;第236卷;第202-207页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104903355A (en) | 2015-09-09 |
| WO2014069979A8 (en) | 2015-07-30 |
| PH12015500908A1 (en) | 2015-07-13 |
| HK1210485A1 (en) | 2016-04-22 |
| WO2014069979A1 (en) | 2014-05-08 |
| MY183968A (en) | 2021-03-17 |
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