JPS6139842B2 - - Google Patents
Info
- Publication number
- JPS6139842B2 JPS6139842B2 JP17900981A JP17900981A JPS6139842B2 JP S6139842 B2 JPS6139842 B2 JP S6139842B2 JP 17900981 A JP17900981 A JP 17900981A JP 17900981 A JP17900981 A JP 17900981A JP S6139842 B2 JPS6139842 B2 JP S6139842B2
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- pigment
- ink
- waste ink
- dispersibility
- 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.)
- Expired
Links
- 239000000049 pigment Substances 0.000 claims description 50
- 239000002904 solvent Substances 0.000 claims description 46
- 239000002699 waste material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004821 distillation Methods 0.000 claims description 2
- 239000000976 ink Substances 0.000 description 37
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 24
- 229920005989 resin Polymers 0.000 description 18
- 239000011347 resin Substances 0.000 description 18
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 235000019441 ethanol Nutrition 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000020 Nitrocellulose Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229920001220 nitrocellulos Polymers 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 4
- 229920000180 alkyd Polymers 0.000 description 4
- 239000001055 blue pigment Substances 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000001054 red pigment Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- -1 cyclohexanone Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Extraction Or Liquid Replacement (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
本発明は、廃インキから顔料および溶剤等の有
価物を回収する方法に関する。
凸版、凹版、オフセツト、グラビア等各種の印
刷に適用されるインキは、一般に、顔料、樹脂、
溶剤、可塑剤等の添加剤からなり、第１図に模式
的に示すように、顔料粒子１が樹脂２を介在して
溶剤３中に均一に分散しているものと考えられ
る。
この顔料粒子は、体質顔料、無機系顔料、有機
系顔料に大別され、それぞれ表１に示すような物
性を有している。
The present invention relates to a method for recovering valuables such as pigments and solvents from waste ink. Inks used in various types of printing, such as letterpress, intaglio, offset, and gravure, generally contain pigments, resins,
It consists of additives such as a solvent and a plasticizer, and as schematically shown in FIG. 1, it is thought that pigment particles 1 are uniformly dispersed in a solvent 3 with a resin 2 interposed therebetween. These pigment particles are broadly classified into extender pigments, inorganic pigments, and organic pigments, each of which has physical properties as shown in Table 1.
【表】【table】
【表】
なお、溶剤、樹脂、可塑剤等の添加剤は、上記
の顔料の種類に応じて適切なものが使用されるこ
とはいうまでもない。
新品インキの色相は、大別して赤、青、黄、白
および黒系統であり、用途に応じて単独もしくは
二色以上を混合して用いる。
ところで色が黒くくすんで使用できなくなつた
インキや、印刷機等を洗浄したあとの廃液は、廃
インキとしてインキ製造工程や印刷工場等がら大
量に排出され、いずれの廃インキも各色相のイン
キが混合したものであつて、色のくすんだ廃イン
キ中にはカーボンブラツクからなる黒インキや、
フタロシアニンブルーからなる青インキが含まれ
ている。
上記の廃インキから顔料、溶剤等の有価物を回
収することは困難で、従来は、殆んどが焼却ある
いは投棄され、まれに廃インキ中に熱風、蒸気等
を注入して溶剤を拡散させ、凝縮器等により回収
することもあつたが、充分な回収を行うことはで
きなかつた。
本発明者等は、廃インキから顔料や溶剤等の有
価物を回収し、しかも回収顔料の再利用度を高め
るべく、色のくすみの原因となるカーボンブラツ
クや青色顔料（フタロシアニンブルー）を除去
し、赤、黄、茶色等の色相の鮮やかな顔料を回収
する方法について研究を重ねた結果、次のような
知見を得た。
先ず、表１に示したインキに使用される顔料粒
子は、表２に示すように溶剤の種類によつて異な
つた分散性を示すこと。[Table] It goes without saying that appropriate additives such as solvents, resins, and plasticizers are used depending on the type of pigment mentioned above. The hues of new inks are broadly classified into red, blue, yellow, white, and black, and depending on the purpose, they are used alone or in combination of two or more colors. By the way, ink that has darkened and become unusable, and waste liquid after washing printing machines, etc., are discharged in large quantities as waste ink from ink manufacturing processes and printing factories, and both waste inks are used as inks of various hues. The dull colored waste ink contains black ink made of carbon black,
Contains blue ink consisting of phthalocyanine blue. It is difficult to recover valuable materials such as pigments and solvents from the above waste ink, and conventionally, most of it has been incinerated or dumped, and in rare cases hot air, steam, etc. have been injected into the waste ink to diffuse the solvent. , recovery using a condenser or the like was possible, but sufficient recovery could not be achieved. The present inventors recovered valuable materials such as pigments and solvents from waste ink, and in order to increase the degree of reuse of the recovered pigments, we removed carbon black and blue pigments (phthalocyanine blue) that cause dull colors. As a result of repeated research on methods for recovering pigments with vivid hues such as red, yellow, and brown, the following findings were obtained. First, the pigment particles used in the inks shown in Table 1 show different dispersibility depending on the type of solvent, as shown in Table 2.
【表】
次に、前記したように顔料粒子をインキに使用
する際には樹脂（第１図中の２）を介在させる
が、この樹脂の種類によつても、表２の分散性は
次のように異なつてくること。
(1) トルエン、キシレン等の芳香族炭化水素は、
表２に示すようにいずれの顔料も分散せず、沈
降する傾向にあり、しかも介在樹脂の種類にか
かわらず、この傾向は変わらない。
(2) メチルセロソルブ等のエーテル類、シクロヘ
キサノン等のケトン類は、表２に示すようにい
ずれの顔料も良く分散し、しかも介在樹脂の種
類にかかわらず、この傾向は変わらない。
(3) 酢酸エチル等のエステル類、メチルアルコー
ル、エチルアルコール、イソプロピルアルコー
ル等のアルコール類は、表２に示すように顔料
の種類によつて分散性に選択性を示し、しかも
介在樹脂の種類によつても、例えば、
メチルアルコール、エチルアルコール：
介在樹脂がアルキツド樹脂の場合、これらの
アルコールはアルキツド樹脂を溶解する作用が
ないため、顔料の種類にかかわらず分散性は悪
い、
介在樹脂がニトロセルロースの場合は、これ
らのアルコールはニトロセルロースを溶解する
作用があるため、表２と同様の分散性を示す、
イソプロピルアルコール：
介在樹脂がアルキツド樹脂、ニトロセルロー
スいずれの場合も、イソプロピルアルコールは
これらの樹脂を溶解する作用がないため、顔料
の種類にかかわらず分散性は悪い、
酢酸エチル：
介在樹脂がアルキツド樹脂、ニトロセルロー
スいずれの場合も、酢酸エチルはこれらの樹脂
を溶解する作用があるため、表２と同様の分散
性を示す。
のように分散性に選択性を示す。
(4) 青色顔料（フタロシアニンブルー）およびカ
ーボンブラツクは、いずれの溶剤にもやや分散
し易い傾向がある。
本発明は、以上の知見に基づくもので、廃イン
キ中から顔料と溶剤等の有価成分を回収するに際
し、先ず廃インキ中の顔料は廃インキに顔料分散
性の悪い溶剤を添加することによつて顔料粒子の
分散性を低下させ、顔料粒子を沈降、分離させる
ことにより回収し、一方廃インキ中の溶剤は、顔
料分離後の分離液をストリツピング、蒸留等によ
り回収、精製し、この溶剤回収と同時に該分離液
中に混在する樹脂、ゴム質粘着剤等の高沸点成分
を分離する方法に関するものである。
本発明方法で用いられる顔料分散性の悪い溶剤
としては、前記した知見から明らかなように、ト
ルエン、キシレン等の芳香族炭化水素の他、廃イ
ンキ中の顔料の種類や介在樹脂の種類によつてメ
チルアルコール、エチルアルコール、イソプロピ
ルアルコール等のアルコール類や、酸エチル等の
エステル類が挙げられる。
上記溶剤は、廃インキに対し容量比で３〜10倍
量で使用することが好ましい。３倍未満では顔料
の分離効果の点で充分でなく、また該比率が大に
なるにともなつて処理量が増大するので設備が大
型化し、経費も増加して不利なため、該比率の上
限は10倍程度が適当である。
上記の溶剤を上記の割合で廃インキに添加する
と、廃インキ中の顔料粒子は分散性を失い、凝集
し、沈降する。この時、色のくすみの原因となる
カーボンブラツクや青色顔料は、前記したように
上記溶剤中では余り分散性を失わないので溶剤側
に残り、色相の鮮やかな顔料が分離、回収でき
る。
本発明方法を、第２図のフローシートにしたが
つて具体的に説明する。このフローは次の機能を
もつ３つの系に大別される。
系１：廃インキと溶剤を充分接触させ、顔料を静
置沈殿させる接触槽および溶剤供給系。
この系では、溶剤タンクＴ１から溶剤ポンプ
Ｐ１によつて混合タンクＴ２に送られる顔料分
散性の悪い溶剤と、ホツパＨ１から供給される
廃インキを充分混合、撹拌して顔料粒子に付着
した樹脂等を分散、溶解し、次いで静置、沈降
させるもので、顔料の排出を容易にするために
傾斜底を配し撹拌モータを併置する混合タンク
Ｔ２が中心となる。
系２：溶剤相を抜き出し、空気、水蒸気等により
溶剤分のみを蒸発放散させて回収、精製し、樹
脂、ゴム質粘着剤を分離する系。
この系では顔料が沈降して透明となつた溶剤
相を静かに抜き出して放散塔Ｓに送り、放散塔
Ｓ内の散気管Ｂから温空気または冷空気を注入
し、コンデンサＣ１を経て溶剤を放散しタンク
Ｔ５に回収する。次いでポンプＰ２によりこの
回収溶剤を蒸留塔DTに送り、蒸留して回収溶
剤タンクＴ２，Ｔ３に貯留、または一部をＴ１
に戻して、再利用する。
更に放散塔Ｓで溶剤放散後に残留する樹脂、
高沸点炭化水素等は残渣タンクＴ４に流出さ
せ、再利用または焼却処理等を行なう。
系３：沈殿した顔料を乾燥させ、放散する溶剤含
有空気を処理する系。
この系では混合タンクＴ２で沈殿した顔料を
ドライヤＤ上に落下せしめ、常温空気または外
熱により顔料中の蒸発成分（溶剤等）を放散さ
せ、ガス側は活性炭吸着塔Ａ等に通じて溶剤成
分を処理し、Ｈ２に顔料を回収する。
本発明方法の基礎となつた実験データを次に示
す。
分散性の異なる２種の溶剤、トルエン（分散
性の悪い溶剤）、シクロヘキサノン（分散性の
良い溶剤）を用いて、顔料の沈降特性をみた。
廃インキと溶剤を撹拌モータつきの混合タンク
Ｔ２中に導入し、25℃で充分、混合、撹拌した
後、静置してモノアゾレツド（赤色顔料）イン
キ（Ｒ）とフタロシアニンブルー（青色顔料）
インキ（Ｂ）の粒子沈降率をみた結果を、トル
エンの場合を第３図−１に、シクロヘキサノン
の場合を第３図−２に示す。
これらの図から判るように、顔料の種類に関
係なく、芳香族系炭化水素であるトルエンは顔
料粒子の凝集、沈降を容易化し、ほぼ20分の静
置時間で沈降性粒子のほとんどが沈殿、分離さ
れていることが判る。これに反して顔料の分散
性の良い（凝集性の小さい）溶剤であるシクロ
ヘキサノンでは粒子が液相に浮遊し分散してい
るため、沈降重量も小さく、かつかなり長時
間、顔料の沈降が継続していることが判る。
空気による溶剤相の放散に関するデータを第
４図に示す。モノアゾレツド（赤色顔料）イン
キ30ｇ、分散溶剤としてトルエン100ｇを含有
する溶液を、83℃の放散塔内で空気を３／分
の割合で送つて空気ストリツピングを行なつた
ものである。第４図から、30分の放散時間で、
ほぼ100％のトルエンが放散され回収できるこ
とが判る。
同様の空気放散で得られる回収溶剤および残渣
液組成を表３に示す。
なお、テスト条件は次の通りであつた。
温度：温風（54℃）
放散空気量：15／分
放散時間：95分
放散塔：50mmφ
原液量（初期量）：230ml[Table] Next, as mentioned above, when pigment particles are used in ink, a resin (2 in Figure 1) is used, but depending on the type of resin, the dispersibility in Table 2 is as follows. to come in different ways. (1) Aromatic hydrocarbons such as toluene and xylene are
As shown in Table 2, none of the pigments is dispersed and tends to settle, and this tendency does not change regardless of the type of intervening resin. (2) With ethers such as methyl cellosolve and ketones such as cyclohexanone, all pigments are well dispersed as shown in Table 2, and this tendency does not change regardless of the type of intervening resin. (3) As shown in Table 2, esters such as ethyl acetate, alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol exhibit selectivity in dispersibility depending on the type of pigment, and also depending on the type of intervening resin. For example, methyl alcohol, ethyl alcohol: When the intervening resin is an alkyd resin, these alcohols have no effect of dissolving the alkyd resin, so the dispersibility is poor regardless of the type of pigment.If the intervening resin is nitrocellulose In the case of , these alcohols have the effect of dissolving nitrocellulose, so they show the same dispersibility as shown in Table 2. Isopropyl alcohol: Regardless of whether the intervening resin is an alkyd resin or nitrocellulose, isopropyl alcohol has the effect of dissolving nitrocellulose. Ethyl acetate: Regardless of whether the intervening resin is an alkyd resin or nitrocellulose, ethyl acetate has the effect of dissolving these resins, so it has poor dispersibility regardless of the type of pigment. It shows the same dispersibility as 2. Shows selectivity in dispersion as shown in . (4) Blue pigments (phthalocyanine blue) and carbon black tend to be somewhat easily dispersed in any solvent. The present invention is based on the above knowledge, and when recovering valuable components such as pigments and solvents from waste ink, the pigments in the waste ink are first removed by adding a solvent with poor pigment dispersibility to the waste ink. The solvent in the waste ink is collected by stripping, distilling, etc. the separated liquid after the pigment separation, and recovering the solvent in the waste ink. At the same time, the present invention relates to a method for separating high-boiling components such as resins and rubber adhesives that are mixed in the separated liquid. As is clear from the above findings, solvents with poor pigment dispersibility used in the method of the present invention include aromatic hydrocarbons such as toluene and xylene, as well as solvents that have poor pigment dispersibility, depending on the type of pigment in the waste ink and the type of intervening resin. Examples include alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, and esters such as ethyl acid. It is preferable to use the above solvent in an amount of 3 to 10 times the volume of the waste ink. If it is less than 3 times, the pigment separation effect is not sufficient, and as the ratio increases, the amount of processing increases, resulting in larger equipment and increased costs, which is disadvantageous, so the upper limit of the ratio is Appropriately, it is about 10 times larger. When the above solvent is added to the waste ink in the above ratio, the pigment particles in the waste ink lose their dispersibility, coagulate, and settle. At this time, carbon black and blue pigments, which cause dullness of color, do not lose much of their dispersibility in the solvent as described above, so they remain on the solvent side, and pigments with bright hues can be separated and recovered. The method of the present invention will be specifically explained according to the flow sheet shown in FIG. This flow is roughly divided into three systems with the following functions. System 1: A contact tank and solvent supply system that brings the waste ink and solvent into sufficient contact and allows the pigment to settle. In this system, a solvent with poor pigment dispersibility, which is sent from a solvent tank T1 to a mixing tank T2 by a solvent pump P1, and waste ink supplied from a hopper H1 are sufficiently mixed and stirred to remove resin attached to pigment particles. The mixing tank T2 is centered on a mixing tank T2, which has a slanted bottom and is equipped with a stirring motor to facilitate the discharge of the pigment. System 2: A system in which the solvent phase is extracted and only the solvent is evaporated and dissipated using air, water vapor, etc. to be recovered and purified, and the resin and rubber adhesive are separated. In this system, the pigment settles and the transparent solvent phase is gently extracted and sent to the stripping tower S. Hot or cold air is injected from the diffuser pipe B in the stripping tower S, and the solvent is diffused through the condenser C1. and collected in tank T5. Next, the recovered solvent is sent to the distillation column DT by pump P2, and is distilled and stored in recovered solvent tanks T2 and T3, or a portion is transferred to T1.
Return it to reuse. Furthermore, the resin remaining after the solvent is diffused in the stripping tower S,
High boiling point hydrocarbons and the like are discharged into the residue tank T4 and are reused or incinerated. System 3: A system for drying the precipitated pigment and treating the emitted solvent-containing air. In this system, the pigment precipitated in the mixing tank T2 is dropped onto the dryer D, and the evaporated components (solvent, etc.) in the pigment are diffused by air at room temperature or external heat, and the gas side is passed through an activated carbon adsorption tower A, etc. to remove the solvent components. and recover the pigment in H2. The experimental data that formed the basis of the method of the present invention are shown below. The sedimentation characteristics of the pigment were examined using two solvents with different dispersibility: toluene (a solvent with poor dispersibility) and cyclohexanone (a solvent with good dispersibility).
The waste ink and solvent are introduced into a mixing tank T2 equipped with a stirring motor, and after thorough mixing and stirring at 25°C, the mixture is left standing to form monoazole (red pigment) ink (R) and phthalocyanine blue (blue pigment).
The results of looking at the particle sedimentation rate of ink (B) are shown in Figure 3-1 for toluene and Figure 3-2 for cyclohexanone. As can be seen from these figures, regardless of the type of pigment, toluene, an aromatic hydrocarbon, facilitates the aggregation and settling of pigment particles, and most of the settleable particles settle out and settle out after approximately 20 minutes of standing time. It can be seen that they are separated. On the other hand, in the case of cyclohexanone, which is a solvent with good pigment dispersibility (low agglomeration), the particles are suspended and dispersed in the liquid phase, so the sedimentation weight is small, and the pigment continues to sediment for quite a long time. It can be seen that Data regarding the dissipation of the solvent phase by air is shown in FIG. A solution containing 30 g of monoazole (red pigment) ink and 100 g of toluene as a dispersion solvent was subjected to air stripping by feeding air at a rate of 3/min in a stripping tower at 83°C. From Figure 4, with a dissipation time of 30 minutes,
It can be seen that almost 100% of toluene can be dissipated and recovered. Table 3 shows the recovered solvent and residual liquid composition obtained by similar air diffusion. The test conditions were as follows. Temperature: Warm air (54℃) Diffusion air volume: 15/min Diffusion time: 95 min Diffusion tower: 50mmφ Stock solution volume (initial volume): 230ml
【表】
次に第２図のフローシートに従つてＨ２にて回
収された顔料組成等を表４に示す。
なおテスト条件としては、トルエンにより原料
インキの15倍に希釈、溶解、分散し、室温（24
℃）にて25分静置し、静かに上澄液を排出し、顔
料を回収した。[Table] Next, Table 4 shows the pigment composition etc. recovered in H2 according to the flow sheet shown in FIG. The test conditions included diluting, dissolving, and dispersing the raw ink with toluene to 15 times the original ink, and storing the ink at room temperature (24
℃) for 25 minutes, the supernatant liquid was gently drained, and the pigment was collected.
【表】【table】
【表】
注(1) 回収顔料をシクロヘキサノンに再分散
して沈降天秤法により測定
以上説明した本発明方法は、廃インキから顔料
を回収する他、顔料と類似の性質をもつ染料の分
離、回収にも適用し得るものである。[Table] Note (1) The recovered pigment is redispersed in cyclohexanone and measured by the sedimentation balance method.The method of the present invention described above not only recovers pigment from waste ink, but also separates and recovers dyes with similar properties to pigments. It can also be applied to
第１図はインキ中の顔料粒子の分散状況を模式
的に示す図であり、第２図は本発明方法を行うた
めの装置の一実施態様を示すフローシートであ
り、第３図は分散性の異なる２種の溶媒による粒
子の沈降性の相違を示すグラフであり、第４図は
空気放散によるインキ中の溶剤の放散率を示すグ
ラフである。
FIG. 1 is a diagram schematically showing the state of dispersion of pigment particles in ink, FIG. 2 is a flow sheet showing an embodiment of an apparatus for carrying out the method of the present invention, and FIG. FIG. 4 is a graph showing the difference in settling properties of particles due to two different solvents, and FIG. 4 is a graph showing the diffusion rate of the solvent in the ink due to air diffusion.
Claims (1)
て沈殿した顔料を回収し、顔料回収後の液からス
トリツピング、蒸留により溶剤を回収、精製する
と共に、高沸点成分を分離することを特徴とする
廃インキから有価物を回収する方法。1. A solvent with poor pigment dispersibility is added to waste ink, the precipitated pigment is recovered, and the solvent is recovered and purified from the liquid after the pigment recovery by stripping and distillation, and high boiling point components are separated. A method for recovering valuable materials from waste ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17900981A JPS5881407A (en) | 1981-11-10 | 1981-11-10 | Recovery of valuable from waste ink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17900981A JPS5881407A (en) | 1981-11-10 | 1981-11-10 | Recovery of valuable from waste ink |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5881407A JPS5881407A (en) | 1983-05-16 |
| JPS6139842B2 true JPS6139842B2 (en) | 1986-09-05 |
Family
ID=16058513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17900981A Granted JPS5881407A (en) | 1981-11-10 | 1981-11-10 | Recovery of valuable from waste ink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5881407A (en) |
-
1981
- 1981-11-10 JP JP17900981A patent/JPS5881407A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5881407A (en) | 1983-05-16 |
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