JPS63309537A - Separation of resin from fluorocarbon resin solution - Google Patents
Separation of resin from fluorocarbon resin solutionInfo
- Publication number
- JPS63309537A JPS63309537A JP62145374A JP14537487A JPS63309537A JP S63309537 A JPS63309537 A JP S63309537A JP 62145374 A JP62145374 A JP 62145374A JP 14537487 A JP14537487 A JP 14537487A JP S63309537 A JPS63309537 A JP S63309537A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- fluororesin
- resin
- fluorocarbon resin
- solution
- 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.)
- Pending
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 30
- 239000011347 resin Substances 0.000 title claims abstract description 30
- 238000000926 separation method Methods 0.000 title abstract description 3
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 title abstract 10
- 239000002904 solvent Substances 0.000 claims abstract description 35
- 239000010419 fine particle Substances 0.000 claims abstract description 7
- 239000003960 organic solvent Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 19
- 230000001376 precipitating effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 239000007787 solid Substances 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 6
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 abstract description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009477 glass transition Effects 0.000 abstract description 4
- 239000013557 residual solvent Substances 0.000 abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 abstract description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 229920001567 vinyl ester resin Polymers 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- AKQIUIMGAPTSMT-UHFFFAOYSA-N 2-chloro-1,1,3,4,4,5,6,6,6-nonafluoro-3-(trifluoromethyl)hex-1-ene Chemical compound FC(C(F)(F)F)C(C(C(F)(F)F)(C(=C(F)F)Cl)F)(F)F AKQIUIMGAPTSMT-UHFFFAOYSA-N 0.000 description 1
- ZXABMDQSAABDMG-UHFFFAOYSA-N 3-ethenoxyprop-1-ene Chemical compound C=CCOC=C ZXABMDQSAABDMG-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 125000005586 carbonic acid group Chemical group 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- 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
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、フッ素樹脂溶液からの樹脂分離法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for separating resin from a fluororesin solution.
［従来の技術］
従来、塗料用などを目的として各種溶剤に可溶なフッ素
樹脂か知られている。例えば、特公昭５５−４４０８３
号、特公昭６０−２１６８６号、特公昭６１２１６４４
号、特開昭６１−５７６０９号、特開昭６１−１４１７
１：１号など。しかしながら、これら溶剤可溶性フッ素
樹脂は、一般に、キシレンなどの有機溶剤に溶解させた
状態で流通されるため、運搬において、危険か伴う。ま
た、塗料以外の用途への展開か難しいなどの問題点かあ
った。[Prior Art] Fluororesins that are soluble in various solvents have been known for use in paints and the like. For example, Tokuko Sho 55-44083
No., Special Publication No. 60-21686, Special Publication No. 6121644
No., JP-A-61-57609, JP-A-61-1417
1:1 etc. However, these solvent-soluble fluororesins are generally distributed in a state dissolved in an organic solvent such as xylene, which can be dangerous during transportation. There were also problems, such as the difficulty of expanding the product to uses other than paint.
また、合成樹脂溶液から、樹脂を回収する方法としては
、溶液を加熱することにより直接溶剤を蒸発させ固体樹
脂を分離回収する方法や、水蒸気を溶液中に吹き込み溶
剤を水の共沸蒸発により、溶剤を除去し、樹脂を分離回
収する方法や、溶剤として水可溶性の溶剤か用いられた
場合、溶液を水中に投入することにより、溶剤を水に溶
解させて、樹脂を分離する方法などが知られている。In addition, methods for recovering resin from a synthetic resin solution include a method in which the solvent is directly evaporated by heating the solution and the solid resin is separated and recovered, and a method in which water vapor is blown into the solution and the solvent is removed by azeotropic evaporation of water. There are methods to remove the solvent and separate and recover the resin, and methods to separate the resin by dissolving the solvent in water by pouring the solution into water when a water-soluble solvent is used as the solvent. It is being
［発明の解決しようとする問題点］
従来の合成樹脂溶液から樹脂を回収する方法を、溶剤可
溶性フッ素樹脂溶液に適用した場合、装置壁に融着接着
を起こし、固体フッ素樹脂の回収か困難であるという問
題点があった。[Problems to be solved by the invention] When the conventional method for recovering resin from a synthetic resin solution is applied to a solvent-soluble fluororesin solution, fusion adhesion occurs on the equipment wall, making it difficult to recover the solid fluororesin. There was a problem.
［問題点を解決するための手段］
本発明は、前述の問題点を解決すべくなされたものであ
り、フッ素樹脂を有機溶剤に溶解したフッ素樹脂溶液を
、フッ素樹脂を溶解せず、フッ素樹脂溶液の溶剤を溶解
する溶媒中に、微小粒状に分散させて微粒子状フッ素樹
脂を析出させ、次いでそのフッ素樹脂を回収することを
特徴とするフッ素樹脂溶液からの樹脂の分離法を提供す
るものである。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems. This invention provides a method for separating a resin from a fluororesin solution, which is characterized by dispersing the solvent of the solution in a solvent to precipitate a particulate fluororesin by dispersing it in the form of fine particles, and then recovering the fluororesin. be.
本発明におけるフッ素樹脂としては、溶剤に可溶なフッ
素樹脂か採用される。この溶剤可溶性フッ素樹脂として
は、フルオロオレフィン、ビニルエーテルおよび必要に
応じ他の共単量体の共重合したフッ素樹脂、フルオロオ
レフィン−ビニルエステル系共重合体、などが例示され
る。ここて、フルオロオレフィンとしては、テトラフル
オロエチレン、クロロトリフルオロエチレン、ヘキサフ
ルオロプロピレン、ビニリデンフルオライド、ビニルフ
ルオライドなどが例示される。好ましくは、テトラフル
オロエチレン、クロロトリフルオロエチレン、ヘキサフ
ルオロプロピレンなどのパーハロオレフィン類である。As the fluororesin in the present invention, a fluororesin that is soluble in a solvent is used. Examples of the solvent-soluble fluororesin include fluororesins obtained by copolymerizing fluoroolefins, vinyl ethers, and other comonomers as necessary, and fluoroolefin-vinyl ester copolymers. Examples of the fluoroolefins include tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, vinylidene fluoride, and vinyl fluoride. Preferred are perhaloolefins such as tetrafluoroethylene, chlorotrifluoroethylene, and hexafluoropropylene.
ビニルエーテルとしては、炭素数１〜８程度の直鎖状、
分岐状あるいは脂環状のアルキルビニルエーテル、これ
らアルキルエーテルの炭素に直接結合した水素の一部ま
たは全部かフッ素て置換されたフルオロアルキルビニル
エーテル、また、水酸基、カルボン酸基、エポキシ基、
アミノ基などの官能基含有ビニルエーテルなどが例示さ
れる。また、ビニルエステル類としては、脂肪酸、ビニ
ルエステル類などが例示される。また他の共単量体とし
ては、オレフィン性不飽和結合を有する有機ケイ素化合
物、アクリル酸、メタクリル酸、アクリル酸エステル、
メタクリル酸エステルなどのアクリル糸上ツマ−、アリ
ルビニルエーテルなどが例示される。これらのビニルエ
ステル、共単量体は、水酸基、エポキシ基、アミン基、
カルホン酸基などの官能基を有していてもよい。Vinyl ethers include linear chains with about 1 to 8 carbon atoms,
Branched or alicyclic alkyl vinyl ethers, fluoroalkyl vinyl ethers in which some or all of the hydrogens directly bonded to the carbon atoms of these alkyl ethers are substituted with fluorine, hydroxyl groups, carboxylic acid groups, epoxy groups,
Examples include vinyl ethers containing functional groups such as amino groups. Furthermore, examples of the vinyl esters include fatty acids and vinyl esters. Other comonomers include organosilicon compounds having olefinic unsaturated bonds, acrylic acid, methacrylic acid, acrylic esters,
Examples include acrylic thread binders such as methacrylic acid ester, allyl vinyl ether, and the like. These vinyl esters and comonomers have hydroxyl groups, epoxy groups, amine groups,
It may have a functional group such as a carbonic acid group.
また、これら溶剤可溶性フッ素樹脂は、テトラヒドロフ
ラン中３０°Ｃて測定される固有粘度か０．１〜２．０
ｄｌ／ｇ程度であることが好ましい。またガラス転移
温度か３０℃以上であることか好ましい。In addition, these solvent-soluble fluororesins have an intrinsic viscosity of 0.1 to 2.0 when measured in tetrahydrofuran at 30°C.
It is preferable that it is about dl/g. Further, it is preferable that the glass transition temperature is 30°C or higher.
本発明において、フッ素樹脂溶液の溶剤としては、上記
フッ素樹脂を溶解する種々の溶剤か採用される。たとえ
ば、ケトン類、アルコール類、エーテル類、芳香族炭化
水素類、塩素系溶剤、フッ素系溶剤、ミネラルスピリッ
トなどの石油系溶剤などが例示される。In the present invention, as the solvent for the fluororesin solution, various solvents that dissolve the above-mentioned fluororesin are employed. Examples include ketones, alcohols, ethers, aromatic hydrocarbons, chlorinated solvents, fluorinated solvents, and petroleum solvents such as mineral spirits.
また、本発明の方法ては、フッ素樹脂溶液を、フッ素樹
脂を溶解せず、フッ素樹脂溶液の溶剤を溶解する溶媒中
に微小粒状に投入させることか重要である。かかる溶媒
としては、フッ素樹脂およびフッ素樹脂溶液の溶剤の選
択により種々の溶媒を選択することか出来るか、工業的
には水を用いることか好ましい。溶媒としては水を用い
た場合には、フッ素樹脂溶液の溶剤として、水に可溶な
ケトン類、アルコール類、エーテル類を選ぶことか好ま
しい。またフッ素樹脂溶液を溶媒中へ微小粒状に分散さ
せて、微粒状フッ素樹脂を析出させ、次いでそのフッ素
樹脂を回収することか重要である。単にフッ素樹脂溶液
を前記溶媒中に投入するたけては、フッ素樹脂は大きな
塊となり、溶剤の除去を充分に行うことか困難になる。Furthermore, in the method of the present invention, it is important that the fluororesin solution is introduced in the form of fine particles into a solvent that does not dissolve the fluororesin but dissolves the solvent of the fluororesin solution. As such a solvent, various solvents can be selected depending on the selection of the fluororesin and the solvent for the fluororesin solution, or it is preferable to use water from an industrial perspective. When water is used as the solvent, it is preferable to select water-soluble ketones, alcohols, and ethers as the solvent for the fluororesin solution. It is also important to disperse the fluororesin solution in the form of fine particles in a solvent, precipitate the finely divided fluororesin, and then recover the fluororesin. If the fluororesin solution is simply poured into the solvent, the fluororesin will form large lumps, making it difficult to remove the solvent sufficiently.
フッ素樹脂溶液を微小粒状に分散させる手段としては種
々の方法を採用しうる。通常は、上記＃奴の乱流状の流
れにフッ素樹脂溶液を供給して分散させる方法か採用さ
れる。具体的には、後述のようなノスルから乱流状に噴
出させた溶媒の流れにフッ素樹脂溶液を供給する方法や
激しい攪拌下の溶媒中にフッ素樹脂溶液を供給する方法
かある。その他、フッ素樹脂溶液をスプレー等で微細な
粒状とし、それを溶媒に接触させるなどの方法も採用し
つる。Various methods can be used to disperse the fluororesin solution into fine particles. Usually, a method is adopted in which a fluororesin solution is supplied to the above-mentioned turbulent flow and dispersed. Specifically, there are a method of supplying the fluororesin solution to a stream of solvent jetted out in a turbulent flow from a nostle as described below, and a method of supplying the fluororesin solution into a solvent under vigorous stirring. Other methods include making the fluororesin solution into fine particles by spraying and bringing them into contact with a solvent.
以下に本発明の方法を実施した装置の図を用いて、本発
明をさらに具体的に説明する。第１図は、本発明の方法
を実施した装置の一例である。図中、１は樹脂析出部で
あり、２段のヘンチュリーから構成されており、２は、
樹脂回収槽てあり、３は水循環用ポンプである。第２図
はベンチュリ一部の拡大図である。装置内部を水か高速
て循環されており、水温はｌＯ°Ｃ程度に保持されてい
る。フッ素樹脂溶液は、供給ポンプにより、４より、強
制的にベンチュリ一部ヘフィートされる。フィートされ
たフッ素樹脂溶液は、ベンチュリ一部を通過する水の激
しい渦流の発生により微細に分散される。この時、フッ
素樹脂溶液の溶媒は水に溶解するため、水に不溶である
フッ素樹脂は析出される。析出したフッ素樹脂は、粒状
で、水に分解され、水の流れにより樹脂回収槽に搬送さ
れる。樹脂回収槽では、フッ素樹脂粒の水分散液を、固
・液分離操作し、粒状フッ素樹脂を回収、水は、水循環
用ポンプに供給され、装置内を循環する。また回収され
た粒状フッ素樹脂は、ざらにこ流動乾燥機により、残留
水分または溶剤か除去され、固体状のフッ素樹脂が得ら
れる。The present invention will be explained in more detail below using the drawings of an apparatus that implements the method of the present invention. FIG. 1 is an example of an apparatus implementing the method of the present invention. In the figure, 1 is the resin precipitation part, which is composed of two stages of henturi, and 2 is the resin precipitation part.
There is a resin recovery tank, and 3 is a water circulation pump. Figure 2 is an enlarged view of a portion of the venturi. Water is circulated inside the device at high speed, and the water temperature is maintained at about 10°C. The fluororesin solution is forcibly fed to a portion of the venturi via a supply pump. The poured fluororesin solution is finely dispersed by the generation of a violent vortex of water passing through a portion of the venturi. At this time, since the solvent of the fluororesin solution is dissolved in water, the fluororesin that is insoluble in water is precipitated. The precipitated fluororesin is in the form of particles, decomposed into water, and transported to a resin recovery tank by the flow of water. In the resin recovery tank, the aqueous dispersion of fluororesin particles is subjected to a solid/liquid separation operation to recover particulate fluororesin. Water is supplied to a water circulation pump and circulated within the apparatus. Further, residual moisture or solvent is removed from the recovered granular fluororesin using a coarse fluidized dryer to obtain a solid fluororesin.
［実施例コ 以下の実施例は前記図示した装置を用いて実施した。[Example code] The following examples were carried out using the apparatus shown above.
実施例１
固有粘度か０．２ｄｌ／ｇてあり、ガラス転移温度か４
５℃であるフッ素樹脂のターシャリ−ブタノール５０重
量％溶液を温度５℃の水が２１１１３／分の流量で循環
する樹脂析出部へ５文／分の速度でフィートし、粒子径
０．１〜１■の粒状フッ素樹脂を回収した。この粒状フ
ッ素樹脂の乾燥後の残存溶剤量は１重量％以下であった
。Example 1 The intrinsic viscosity is 0.2 dl/g, and the glass transition temperature is 4
A 50% by weight solution of fluororesin in tert-butanol at a temperature of 5°C is fed at a rate of 5 g/min to a resin precipitation section where water at a temperature of 5°C circulates at a flow rate of 21113/min, and the particle size is 0.1 to 1. Particulate fluororesin (2) was recovered. The amount of residual solvent in this granular fluororesin after drying was 1% by weight or less.
実施例２
固有粘度か０．１ｄｌ／ｇであり、ガラス転移点が３５
℃である４０重量％溶解したターシャリ−ツタノール、
セカンダリ−ツタノール混合溶剤溶液を、温度２°Ｃの
水か３ｍ’／分の流量て循環する樹脂析出部へ５文／分
の速度でフィートすることにより、粒子径０．１〜０．
５■の粒状フッ素樹脂を得た。この粒状フッ素樹脂の乾
燥後の残存溶剤量は１重量％以上であった。Example 2 The intrinsic viscosity is 0.1 dl/g and the glass transition point is 35
tert-tutanol dissolved at 40% by weight at °C;
By feeding the secondary-tutanol mixed solvent solution at a rate of 5 g/min to a resin precipitation section where water at a temperature of 2° C. was circulated at a flow rate of 3 m'/min, particle sizes of 0.1-0.
A 5-inch granular fluororesin was obtained. The amount of residual solvent in this granular fluororesin after drying was 1% by weight or more.
［発明の効果］
本発明の方法は、フッ素樹脂溶液から、固体フッ素樹脂
を極めて効率よく、分離することかできる。さらに、本
発明の方法により得られる固体フッ素樹脂は残存溶剤量
が極めて少なく、また粒状であるため、成形用として使
用する場合の作業性に極めて優れる。[Effects of the Invention] The method of the present invention makes it possible to very efficiently separate a solid fluororesin from a fluororesin solution. Furthermore, since the solid fluororesin obtained by the method of the present invention has an extremely small amount of residual solvent and is granular, it has extremely excellent workability when used for molding.
第１図は、本発明の方法を実施する装置の一例てあり、
第２図はベンチュリ一部の拡大図である。
図において、１は樹脂析出部、２は樹脂回収槽てあり、
３は水循環用ポンプてあり、５はフッ素樹脂である。FIG. 1 shows an example of an apparatus for implementing the method of the present invention,
Figure 2 is an enlarged view of a portion of the venturi. In the figure, 1 is the resin precipitation part, 2 is the resin recovery tank,
3 is a water circulation pump, and 5 is a fluororesin.
Claims (1)
、フッ素樹脂を溶解せず、フッ素樹脂溶液の溶剤を溶解
する溶媒中に、微小粒状に分散させて微粒子状フッ素樹
脂を析出さ せ、次いでそのフッ素樹脂を回収することを特徴とする
フッ素樹脂溶液からの樹脂の分離法。[Claims] 1. A fluororesin solution obtained by dissolving a fluororesin in an organic solvent is dispersed in the form of fine particles in a solvent that does not dissolve the fluororesin but dissolves the solvent of the fluororesin solution to produce a finely divided fluororesin. 1. A method for separating a resin from a fluororesin solution, which comprises precipitating the fluororesin and then recovering the fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62145374A JPS63309537A (en) | 1987-06-12 | 1987-06-12 | Separation of resin from fluorocarbon resin solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62145374A JPS63309537A (en) | 1987-06-12 | 1987-06-12 | Separation of resin from fluorocarbon resin solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63309537A true JPS63309537A (en) | 1988-12-16 |
Family
ID=15383749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62145374A Pending JPS63309537A (en) | 1987-06-12 | 1987-06-12 | Separation of resin from fluorocarbon resin solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63309537A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6061629A (en) * | 1992-01-22 | 2000-05-09 | Mitsubishi Denki Kabushiki Kaisha | Traffic navigation apparatus having a by-pass function |
-
1987
- 1987-06-12 JP JP62145374A patent/JPS63309537A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6061629A (en) * | 1992-01-22 | 2000-05-09 | Mitsubishi Denki Kabushiki Kaisha | Traffic navigation apparatus having a by-pass function |
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