CN1597716A - Method of separating polyethylene wax - Google Patents
Method of separating polyethylene wax Download PDFInfo
- Publication number
- CN1597716A CN1597716A CN 200410043806 CN200410043806A CN1597716A CN 1597716 A CN1597716 A CN 1597716A CN 200410043806 CN200410043806 CN 200410043806 CN 200410043806 A CN200410043806 A CN 200410043806A CN 1597716 A CN1597716 A CN 1597716A
- Authority
- CN
- China
- Prior art keywords
- polyethylene wax
- solvent
- temperature
- weight average
- product
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
A process for classifying the polyvinyl wax by molecular weights features that the C5-C12 paraffin, arylhydrocarbon or their mixture is used as solvent, the C2-C4 monoalcohol is used as precipitant, and the classifying procedure for each product includes changing the dissolving temp and solvent ratio, dissolving, concentrating, deposition, separating and drying.
Description
Technical field
The invention belongs to separation method, particularly relate to a kind of method of cutting apart polyethylene wax.
Background technology
At present, the utilization to the by product-low molecular weight polyethylene wax of polyethylene device only is to dust as stopping composition through simple decolouring or simple fusion.Like this, because purity is not high, molecular weight distribution is wide, melting range is wide, seriously limited its Application Areas, utility value is lower.
Summary of the invention
The present invention is intended to solve the deficiencies in the prior art, and a kind of method of cutting apart polyethylene wax is provided.
Technical scheme of the present invention is: with the polyethylene wax of molecular weight between 500-10000 is raw material, with C
5～C
12Alkane, aromatic hydrocarbons or their mixture be solvent, with C
2～C
4Monohydroxy-alcohol be precipitation agent, through dissolving, concentrate, precipitation, separation, drying and other steps, promptly make the multistage polyethylene wax product that average different molecular weight distributes, the concrete operations step is as follows:
A, dissolving: with C
5～C
12Alkane, aromatic hydrocarbons or their mixture as solvent, polyethylene wax is dissolved, solvent ratio (weight ratio of solvent and polyethylene wax) is 3～6: 1, temperature is 20～135 ℃;
B, concentrate: the lysate that a is reached dissolution equilibrium distills concentrated, to concentration be 10～30% (polyethylene wax content);
C, precipitation: under the room temperature, in the concentrated solution of b, add precipitation agent C
2～C
4Monohydroxy-alcohol precipitate, the weight ratio of precipitation agent and concentrated solution is 1～5: 1;
D, separation: under the room temperature, precipitated liquid is carried out centrifugation;
E, drying: in the time of 50～80 ℃, the isolating throw out of d is carried out drying, till solvent-free flavor, promptly be partitioned into other polyethylene wax product of certain molecular weight level;
Undissolved polyethylene wax among a is strengthened solvent ratio step by step and improve temperature and continue dissolving, concentrate, precipitate, separation, exsiccant operating process, promptly corresponding making strengthened other polyethylene wax product of molecular-weight average level step by step.
Operational condition preferable in the aforesaid operations process is: solvent is C
8～C
10Alkane, C
6～C
8The benzene class or both mixtures, its solvent ratio is 3～5: 1, solvent temperature is 20～135 ℃, precipitation agent is ethanol or butanols.
Be that raw material carries out multi-stage division purified operational condition and is: solvent ratio 3.0～4.0 with the polyethylene wax with the corresponding relation of product: 1,20～40 ℃ of temperature, the product molecular-weight average is 1600;
Solvent ratio 3.2～4.2: 1,35～60 ℃ of temperature, the product molecular-weight average is 2500;
Solvent ratio 3.4～4.4: 1,50～80 ℃ of temperature, the product molecular-weight average is 3500;
Solvent ratio 3.6～4.6: 1,65～100 ℃ of temperature, the product molecular-weight average is 5000;
Solvent ratio 3.8～4.8: 1,80～120 ℃ of temperature, the product molecular-weight average is 6000;
Solvent ratio 4.0～5.0: 1,100～135 ℃ of temperature, the product molecular-weight average is 8000;
Wherein the polydispersity coefficient of each fraction product molecular-weight average is 3～5.
The dried polyethylene wax of the resulting classification of above steps is pulverized, and can make median size is D
V50=16～20 microns, D
V90=31～40 microns polyethylene wax micro mist.
Adopt this method with polyethylene wax through cut apart refining after, the molecular weight distribution melting range narrows down, melting range does not contain inorganic and organic impurity less than 10 ℃, whiteness is more than 90%.
Polyethylene wax can be used for the printing ink manufacturing and polishes softening agent, lubricant, polrvinyl chloride product bright lubricant, releasing agent, hot melt adhesive, Masterbatch processing etc. in wax, high-grade hard floor paint, high-grade car polishing wax, rubber demoulding protective agent, the weaving processing, be used to improve paper coating gloss and persistency, be used for cable compound, cable colour batch additive, board coating, vial coating, hotmelt, special warfare candle etc.In addition, polyethylene wax also can be used as agent for improving flowability of diesel oil.
Polyethylene wax micro mist mainly is used in coating, paint and the printing-ink as matting agent, the agent of antiseized limit, slip(ping)agent and scratching resistant etc.Difference according to size, polyethylene wax micro mist can use in hard-gloss paint, general coating, can lacquer, package coating, stain for wood, varnish, UV solidified paint, stamp japanning and printing-ink, can make paint film have characteristics such as the wear-resisting antiblocking of scratch resistance, anti-polishing, smooth and coefficient of friction are low.Simultaneously, also can prevent precipitation cakings such as metallic pigment, zero diopter powder, high-visibility pigment and matting agent such as aluminium paste, thereby improve coating quality and improve gloss of film.In addition, these product also have good eliminate optical property, if with sio and better with extinction effect, the measured polyethylene wax micro mist of matter also can be used for makeup and personal care articles.At present, the market requirement of domestic polyethylene wax micro mist is about 10,000 tons, wherein most of dependence on import, particularly high-quality micro mist wax.Therefore, the exploitation of refining polyethylene wax of classification and micro mist thereof is significant.
Enlarged its Application Areas cutting apart of the different molecular weight that a kind of method of cutting apart polyethylene wax of the present invention is simple to operate, realized polyethylene wax, promoted the application performance and the added value of product.
Embodiment
A kind of method of cutting apart polyethylene wax of the present invention is enumerated following specific embodiment:
Embodiment 1
With the polyethylene wax is raw material, with C
5～C
12Alkane, aromatic hydrocarbons or their mixture be solvent, with C
2～C
4Monohydroxy-alcohol be that precipitation agent carries out following operation steps:
A, dissolving: with C
5～C
12Alkane, aromatic hydrocarbons or their mixture as solvent, polyethylene wax is dissolved, solvent ratio (weight ratio of solvent and polyethylene wax) is 3～6: 1, temperature is 20～135 ℃;
B, concentrate: get lysate that a reaches dissolution equilibrium distill concentrated, to concentration be 10～30% (polyethylene wax content);
C, precipitation: at room temperature, with C
2～C
4Monohydroxy-alcohol to be precipitation agent precipitate the concentrated solution of b, the weight ratio of precipitation agent and concentrated solution is 1～5: 1;
D, separation: at room temperature, precipitated liquid is carried out centrifugation;
E, drying: at 50～80 ℃, isolating throw out is carried out drying, till solvent-free flavor, promptly be partitioned into other polyethylene wax product of certain molecular weight level;
Undissolved polyethylene wax among a is strengthened solvent ratio step by step and improve temperature and continue dissolving, concentrate, precipitate, separation, exsiccant operating process, promptly corresponding making strengthened other polyethylene wax product of molecular-weight average level step by step.
Embodiment 2
With C
8～C
10Alkane is that solvent, ethanol or butanols are the method that polyethylene wax is cut apart in the precipitation agent explanation step by step:
A, dissolving: in the time of 35～40 ℃, with C
8～C
10Alkane and polyethylene wax are to dissolve at 3: 1 with weight ratio;
B, concentrate: get lysate that a reaches dissolution equilibrium distill concentrated, to concentration be 10～20%;
C, precipitation: at room temperature, being precipitation agent with ethanol or butanols precipitates the concentrated solution of b, and the weight ratio of precipitation agent and concentrated solution is 1～3: 1;
Through separate, drying, promptly make molecular-weight average and be 1600 polyethylene wax and produce mouthful product;
With undissolved polyethylene wax among a, with C
8～C
10Alkane is solvent, increases the operation of solvent ratio and corresponding lifting solvent temperature step by step, carry out again same concentrating, precipitation, separation, drying step-by-step, promptly make the polyethylene wax product that average different molecular weight distributes.Specifically see the following form:
| Temperature during dissolving ℃ | C 8～C 10Alkane and polyethylene wax weight ratio | The molecular-weight average of polyethylene wax |
| ????55～60 | ??????????3.2∶1 | ?????????2500 |
| ????75～80 | ??????????3.4∶1 | ?????????3500 |
| ????95～100 | ??????????3.6∶1 | ?????????5000 |
| ????115～120 | ??????????3.8∶1 | ?????????6000 |
| ????130～135 | ??????????4.0∶1 | ?????????8000 |
Embodiment 3
With C
6～C
8The benzene class be that solvent, ethanol or butanols are the operation that precipitation agent is cut apart step by step to polyethylene wax:
A, dissolving: in the time of 20～25 ℃, with C
6～C
8Benzene class and polyethylene wax be to dissolve at 4: 1 with weight ratio;
B, concentrate: the lysate that a is reached dissolution equilibrium distills concentrated, to concentration be 20～30%;
C, precipitation: under the room temperature, being precipitation agent with ethanol or butanols precipitates the concentrated solution of b, and the weight ratio of ethanol or butanols and concentrated solution is 3～5: 1;
D, separation, drying promptly make molecular-weight average and are 1600 polyethylene wax product.
Through the corresponding polyethylene wax product that makes of the repetitive operation of its different condition.See the following form:
| Temperature during dissolving ℃ | ?C 6～C 8Benzene class and polyethylene wax weight ratio | The molecular-weight average of polyethylene wax |
| ????20～25 | ????????????4.0∶1 | ?????????1600 |
| ????35～45 | ????????????4.2∶1 | ?????????2500 |
| ????50～60 | ????????????4.4∶1 | ?????????3500 |
| ????65～75 | ????????????4.6∶1 | ?????????5000 |
| ????80～90 | ????????????4.8∶1 | ?????????6000 |
| ????100～110 | ????????????5.0∶1 | ?????????8000 |
Embodiment 4
With C
8Alkane and C
6～C
8The mixed solution of benzene class be solvent, its C
8Alkane and C
6～C
8The weight ratio of benzene class be 1: 1, ethanol or butanols are that precipitation agent further specifies the following operation steps of cutting apart polyethylene wax step by step again:
A, dissolving: in the time of 25～35 ℃, be to dissolve at 3: 1 with solvent ratio;
B, concentrate: the lysate that a is reached dissolution equilibrium distills concentrated, to concentration be 15～25%;
C, precipitation: at room temperature, being precipitation agent with ethanol or butanols precipitates the concentrated solution of b, and the weight ratio of butanols and concentrated solution is 2～4: 1;
D, separation, drying promptly make molecular-weight average and are 1600 polyethylene wax product.
Through the corresponding polyethylene wax product that makes of the repetitive operation of its different condition.See the following form:
| Temperature during dissolving ℃ | C 8Alkane and C 6～C 8The mixed solution and the polyethylene wax weight ratio of benzene class | The molecular-weight average of polyethylene wax |
| ????25～35 | ??????????3.2∶1 | ??????????1600 |
| ????40～50 | ??????????3.4∶1 | ??????????2500 |
| ????55～65 | ??????????3.8∶1 | ??????????3500 |
| ????70～80 | ??????????4.2∶1 | ??????????5000 |
| ????85～95 | ??????????4.6∶1 | ??????????6000 |
| ????105～115 | ??????????5.0∶1 | ??????????8000 |
Embodiment 5
Above-mentioned dried polyethylene wax is pulverized again, and promptly making median size is D
V50=16～20 microns, D
V90=31～40 microns polyethylene wax micro mist.
Claims (5)
1, a kind of method of cutting apart polyethylene wax is characterized in that with the polyethylene wax being raw material, with C
5～C
12Alkane, aromatic hydrocarbons or their mixture be solvent, with C
2～C
4Monohydroxy-alcohol be that precipitation agent carries out following operation steps:
A, dissolving: with C
5～C
12Alkane, aromatic hydrocarbons or their mixture as solvent, polyethylene wax is dissolved, solvent ratio (weight ratio of solvent and polyethylene wax) is 3～6: 1, temperature is 20～135 ℃;
B, concentrate: get lysate that a reaches dissolution equilibrium distill concentrated, to concentration be 10～30% (polyethylene wax content);
C, precipitation: under the room temperature, with C
2～C
4Monohydroxy-alcohol to be precipitation agent precipitate the concentrated solution of b, the weight ratio of precipitation agent and concentrated solution is 1～5: 1;
D, separation: at room temperature, precipitated liquid is carried out centrifugation;
E, drying: at 50～80 ℃, isolating throw out is carried out drying, till solvent-free flavor, promptly be partitioned into other polyethylene wax product of certain molecular weight level;
Undissolved polyethylene wax among a is strengthened solvent ratio step by step and improve temperature and continue dissolving, concentrate, precipitate, separation, exsiccant operating process, promptly corresponding making strengthened other polyethylene wax product of molecular-weight average level step by step.
2, a kind of method of cutting apart polyethylene wax as claimed in claim 1 is characterized in that described solvent is C
7～C
10Alkane, C
6～C
8The benzene class or both mixtures, its solvent ratio is 3～5: 1, solvent temperature is 20～135 ℃, precipitation agent is ethanol or butanols.
3, a kind of method of cutting apart polyethylene wax as claimed in claim 1 or 2 is characterized in that pulverizing after the drying, and making median size is D
V50=16～20 microns, D
V90=31～40 microns polyethylene wax micro mist.
4, a kind of method of cutting apart polyethylene wax as claimed in claim 1 or 2, it is characterized in that with the polyethylene wax being that raw material carries out multi-stage division purified operational condition and is: solvent ratio 3.0～4.0: 1 with the corresponding relation of its product, 20～40 ℃ of temperature, product molecular-weight average are 1600;
Solvent ratio 3.2～4.2: 1,35～60 ℃ of temperature, the product molecular-weight average is 2500;
Solvent ratio 3.4～4.4: 1,50～80 ℃ of temperature, the product molecular-weight average is 3500;
Solvent ratio 3.6～4.6: 1,65～100 ℃ of temperature, the product molecular-weight average is 5000;
Solvent ratio 3.8～4.8: 1,80～120 ℃ of temperature, the product molecular-weight average is 6000;
Solvent ratio 4.0～5.0: 1,100～135 ℃ of temperature, the product molecular-weight average is 8000;
Wherein the polydispersity coefficient of the product molecular-weight average of each fraction is 3～5.
5, a kind of method of cutting apart polyethylene wax as claimed in claim 4 is characterized in that pulverizing after the drying again, and promptly making median size is D
V50=16～20 microns, D
V90=31～40 microns polyethylene wax micro mist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043806 CN1286868C (en) | 2004-08-13 | 2004-08-13 | Method of separating polyethylene wax |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043806 CN1286868C (en) | 2004-08-13 | 2004-08-13 | Method of separating polyethylene wax |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1597716A true CN1597716A (en) | 2005-03-23 |
| CN1286868C CN1286868C (en) | 2006-11-29 |
Family
ID=34665462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410043806 Expired - Fee Related CN1286868C (en) | 2004-08-13 | 2004-08-13 | Method of separating polyethylene wax |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1286868C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101923A (en) * | 2010-04-29 | 2011-06-22 | 长春工业大学 | Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene |
| CN108148151A (en) * | 2016-12-05 | 2018-06-12 | 中国石油天然气股份有限公司 | The process for purification and refining plant of refined polyethylene wax, polyethylene wax crude product |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030084448A1 (en) * | 2001-10-26 | 2003-05-01 | Koninklijke Philips Electronics N.V. | Automatic viewing-history based television control system |
-
2004
- 2004-08-13 CN CN 200410043806 patent/CN1286868C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101923A (en) * | 2010-04-29 | 2011-06-22 | 长春工业大学 | Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene |
| CN102101923B (en) * | 2010-04-29 | 2013-02-20 | 长春工业大学 | Method for raising melting point of polyethylene wax which is byproduct in preparation of polyethylene |
| CN108148151A (en) * | 2016-12-05 | 2018-06-12 | 中国石油天然气股份有限公司 | The process for purification and refining plant of refined polyethylene wax, polyethylene wax crude product |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1286868C (en) | 2006-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1884401A (en) | Ultraviolet light cured printing ink | |
| CN104031535A (en) | Novel low-matte polyester finish coating and preparation method thereof | |
| CN101906735B (en) | Aqueous gloss oil for beer cartons and preparation method thereof | |
| CN1840595A (en) | Aqueous wood paint and method for preparing same | |
| CN1140736A (en) | Method for providing waterborne coating composition with improved color acceptance | |
| EP2794263B2 (en) | Pressure-sensitive label structures, and methods of making same | |
| US20140018474A1 (en) | Composition for anti-scratch and wear-resistance properties, method of preparing the same, and its applications | |
| CN111440501A (en) | Organic silicon-fluorine modified acrylic resin powder coating and preparation method thereof | |
| CN1286868C (en) | Method of separating polyethylene wax | |
| CN102993864A (en) | Aqueous traffic paint and preparation method thereof | |
| JP3509278B2 (en) | Laminated stretched thermoplastic resin film with excellent printability | |
| CN1295597A (en) | Multi-layer polymer film | |
| CN1305941C (en) | Applied film | |
| CN1478119A (en) | Stretched resin film | |
| CN109385055B (en) | High-transparency PET anti-scratching master batch and preparation method thereof | |
| CN1487013A (en) | Coloring agglomerate for polyethylene packing film and its prepn process | |
| CN112694552A (en) | Preparation method of polyethylene wax with lower molecular weight distribution index | |
| CN111393940A (en) | High-weather-resistance self-cleaning acrylic resin powder coating and preparation method thereof | |
| CN1178819A (en) | Silicon propyl resin for paint and its producing method | |
| CN1242888C (en) | Blanching pattern mark carbon band | |
| CN1162484C (en) | Resin dedicated for coating on polypropylene plastics | |
| CN1216559A (en) | Polyolefin film, compositions and resins useable therefore and related making method | |
| CN110078117B (en) | Compound organic matter for preparing high-whiteness titanium tetrachloride by removing vanadium from crude titanium and preparation method thereof | |
| WO2014051252A1 (en) | Coating composition for easily adhering polyester film with excellent surface smoothness, and polyester film using same | |
| CN1590483A (en) | Temporary tearable protechtive paint and its preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |