CN106674548A - Method for extracting PVC resin powder from soft PVC medical granules - Google Patents
Method for extracting PVC resin powder from soft PVC medical granules Download PDFInfo
- Publication number
- CN106674548A CN106674548A CN201611098579.5A CN201611098579A CN106674548A CN 106674548 A CN106674548 A CN 106674548A CN 201611098579 A CN201611098579 A CN 201611098579A CN 106674548 A CN106674548 A CN 106674548A
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- Prior art keywords
- pvc
- resin powder
- granules
- extracting
- pellet
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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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
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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
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention relates to the technical fields of medicines and chemical engineering and particularly relates to a method for extracting PVC resin powder from soft PVC medical granules. The method comprises the following steps: (1) adequately shearing PVC granules, putting the shorn PVC granules into hollow cotton, putting the hollow cotton into a fat extractor, carrying out diethyl ether water bath reflux at 50 DEG C for 4-8 hours, extracting an oil aid from the PVC granules, drying, and taking out the residual granules; and (2) dissolving the residual granules in the step (1) into tetrahydrofuran, after the residual granules are completely dissolved, adding methanol until PVC resin powder is separated out, filtering, and drying the separated PVC resin powder, so as to obtain to-be-detected PVC resin powder. According to the method, by detecting the polymerization degree of the PVC resin powder extracted from the PVC medical granules so as to determine the model, powerful technical supports are provided for the analysis and design of a formula. The method is simple, convenient and feasible and has very high practical values.
Description
Technical field
The present invention relates to pharmaceutical chemistry technical field, especially a kind of to extract PVC resin powder in the medical pellet of flexible PVC
Method.
Background technology
Polrvinyl chloride, is the universal synthetic resin material of China first, the second in the world, due to excellent flame retardancy,
Wearability, resistance to chemical corrosion, comprehensive mechanical, product the transparency, electrical insulating property and be easier processing the features such as, at present,
PVC has become one of most commonly used plastic of application, in industry, building, agricultural, daily life, packaging, electricity
The fields such as power, public utilities are widely used, and with polyethylene, polypropylene, polystyrene and ABS five big universal trees are referred to as
Fat.
Composition detection to the medical pellet of flexible PVC, needs first to extract PVC resin powder from the medical pellets of PVC, existing
Extracting method it is complicated, practicality is not also high.
The content of the invention
The purpose of the present invention is：Overcome deficiency of the prior art, there is provided a kind of method is simple, practicality is high from
The method that PVC resin powder is extracted in the medical pellet of flexible PVC.
For achieving the above object, the technical solution used in the present invention is as follows：
A kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, the method comprising the steps of：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-bath backflows of ether
4-8h, extracts the oil auxiliary agent in PVC pellets out, after being dried, takes out remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, and methanol is added extremely after pellet is completely dissolved
Polyvinyl chloride resin powder is separated out, and is filtered, and the polyvinyl chloride resin powder of precipitation is dried to obtain into PVC resin powder to be detected.
Preferably, the oil auxiliary agent includes plasticizer.
Preferably, ether and the mass ratio of PVC pellets are 5-10 in the step (1):1.
Preferably, ether and the mass ratio of PVC pellets are 8 in the step (1):1.
Preferably, tetrahydrofuran and the mass ratio of PVC pellets are 3-5 in the step (1):1.
Preferably, tetrahydrofuran and the mass ratio of PVC pellets are 4 in the step (1):1.
It is using the beneficial effect of technical scheme：
Using the principle of similar compatibility, the oil auxiliary agents such as the plasticizer in PVC pellets are extracted out by aether backflow, recycled
PVC resin powder is soluble in the characteristic of tetrahydrofuran, and the PVC resin powder in pellet is extracted, by adding methanol, using molten
Solution degree Parameter Principle, makes PVC resin powder Precipitation, and by the PVC resin powder to extracting from PVC pellets the degree of polymerization is carried out
Detection, determine model, for analyze component design strong technical support is provided.The method is simple and easy to do, there is very high practicality
Value.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
A kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, the method comprising the steps of：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-bath backflows of ether
4-8h, ether is 5 with the mass ratio of PVC pellets:1, the oil auxiliary agent such as plasticizer in extraction PVC pellets after being dried, takes out surplus
Remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, the mass ratio of tetrahydrofuran and PVC pellets
For 3:1, add methanol to separate out to polyvinyl chloride resin powder after pellet is completely dissolved, filter, the polyvinyl chloride resin powder for separating out is dried
Obtain PVC resin powder to be detected.
Embodiment 2
A kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, the method comprising the steps of：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-bath backflows of ether
4-8h, ether is 6 with the mass ratio of PVC pellets:1, the oil auxiliary agent such as plasticizer in extraction PVC pellets after being dried, takes out surplus
Remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, the mass ratio of tetrahydrofuran and PVC pellets
For 3.5:1, add methanol to separate out to polyvinyl chloride resin powder after pellet is completely dissolved, filter, the polyvinyl chloride resin powder of precipitation is done
It is dry to obtain PVC resin powder to be detected.
Embodiment 3
A kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, the method comprising the steps of：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-bath backflows of ether
4-8h, ether is 8 with the mass ratio of PVC pellets:1, the oil auxiliary agent such as plasticizer in extraction PVC pellets after being dried, takes out surplus
Remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, the mass ratio of tetrahydrofuran and PVC pellets
For 4:1, add methanol to separate out to polyvinyl chloride resin powder after pellet is completely dissolved, filter, the polyvinyl chloride resin powder for separating out is dried
Obtain PVC resin powder to be detected.
Embodiment 4
A kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, the method comprising the steps of：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-bath backflows of ether
4-8h, ether is 8 with the mass ratio of PVC pellets:1, the oil auxiliary agent such as plasticizer in extraction PVC pellets after being dried, takes out surplus
Remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, the mass ratio of tetrahydrofuran and PVC pellets
For 4.5:1, add methanol to separate out to polyvinyl chloride resin powder after pellet is completely dissolved, filter, the polyvinyl chloride resin powder of precipitation is done
It is dry to obtain PVC resin powder to be detected.
Embodiment 5
A kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, the method comprising the steps of：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-bath backflows of ether
4-8h, ether is 10 with the mass ratio of PVC pellets:1, the oil auxiliary agent such as plasticizer in extraction PVC pellets after being dried, takes out
Remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, the mass ratio of tetrahydrofuran and PVC pellets
For 5:1, add methanol to separate out to polyvinyl chloride resin powder after pellet is completely dissolved, filter, the polyvinyl chloride resin powder for separating out is dried
Obtain PVC resin powder to be detected.
Embodiment 3 be preferred implementation, the extraction efficiency highest of PVC resin powder.
With the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Entirely various change and modification can be carried out in the range of without departing from this invention technological thought.The technology of this invention
Property scope is not limited to the content in description, it is necessary to its technical scope is determined according to right.
Claims (6)
1. a kind of method for extracting PVC resin powder in the medical pellet of flexible PVC, it is characterised in that methods described includes following step
Suddenly：
(1) PVC pellets are fully shredded, in being put into hollow cotton, in being placed in Soxhlet's apparatus, with 50 DEG C of water-baths backflow 4- of ether
8h, extracts the oil auxiliary agent in PVC pellets out, after being dried, takes out remaining pellet；
(2) the remaining pellet in step (1) is dissolved with tetrahydrofuran, and methanol is added after pellet is completely dissolved to PVC
Resin powder is separated out, and is filtered, and the polyvinyl chloride resin powder of precipitation is dried to obtain into PVC resin powder to be detected.
2. a kind of method for extracting PVC resin powder in the medical pellet of flexible PVC according to claim 1, it is characterised in that：
The oil auxiliary agent includes plasticizer.
3. a kind of method for extracting PVC resin powder in the medical pellet of flexible PVC according to claim 1, it is characterised in that：
Ether and the mass ratio of PVC pellets are 5-10 in the step (1):1.
4. a kind of method for extracting PVC resin powder in the medical pellet of flexible PVC according to claim 3, it is characterised in that：
Ether and the mass ratio of PVC pellets are 8 in the step (1):1.
5. a kind of method for extracting PVC resin powder in the medical pellet of flexible PVC according to claim 1, it is characterised in that：
Tetrahydrofuran and the mass ratio of PVC pellets are 3-5 in the step (1):1.
6. a kind of method for extracting PVC resin powder in the medical pellet of flexible PVC according to claim 5, it is characterised in that：
Tetrahydrofuran and the mass ratio of PVC pellets are 4 in the step (1):1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098579.5A CN106674548A (en) | 2016-12-04 | 2016-12-04 | Method for extracting PVC resin powder from soft PVC medical granules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098579.5A CN106674548A (en) | 2016-12-04 | 2016-12-04 | Method for extracting PVC resin powder from soft PVC medical granules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106674548A true CN106674548A (en) | 2017-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611098579.5A Pending CN106674548A (en) | 2016-12-04 | 2016-12-04 | Method for extracting PVC resin powder from soft PVC medical granules |
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| CN (1) | CN106674548A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595721A (en) * | 2020-06-24 | 2020-08-28 | 广东联塑科技实业有限公司 | Method for measuring PVC (polyvinyl chloride) content and calcium content in polyvinyl chloride product |
-
2016
- 2016-12-04 CN CN201611098579.5A patent/CN106674548A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 岐明等: ""PVC制品中增塑剂和填料的简易测定"", 《聚氯乙烯》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595721A (en) * | 2020-06-24 | 2020-08-28 | 广东联塑科技实业有限公司 | Method for measuring PVC (polyvinyl chloride) content and calcium content in polyvinyl chloride product |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170517 |
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