US988874A - Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action. - Google Patents
Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action. Download PDFInfo
- Publication number
- US988874A US988874A US53108509A US1909531085A US988874A US 988874 A US988874 A US 988874A US 53108509 A US53108509 A US 53108509A US 1909531085 A US1909531085 A US 1909531085A US 988874 A US988874 A US 988874A
- Authority
- US
- United States
- Prior art keywords
- printed paper
- ink
- printers
- substances
- alkaline
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 20
- 239000000126 substance Substances 0.000 title description 15
- 238000004061 bleaching Methods 0.000 title description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 10
- 235000012239 silicon dioxide Nutrition 0.000 description 10
- 229920001131 Pulp (paper) Polymers 0.000 description 8
- 239000003513 alkali Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 229910018626 Al(OH) Inorganic materials 0.000 description 1
- 101710125089 Bindin Proteins 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 101000968267 Drosophila melanogaster Protein dachsous Proteins 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000004035 chlorins Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
Definitions
- This invention relates to a process by means of whichit is possible to free the printed paper from printers ink without the above mentioned disadvantages.
- the process chiefly consists in the soaked and divided pa er being treated in an alkaline solution '0 peroxids in the"presence of substances which during the process pass into a colloidal state.
- peroxids the rium superoxid BaO and the like.
- loidal substances either silicic acid, already in colloidal state, can be added or compounds can be used which, during the process, pass 1 into the colloidal state, for instance silicates,
- the silicic acid develops ina colloid state as the hydrosol' of the acid passes over'into the hydrogel. of the acid. Fine transparent flakes are then formed which may bacalled colloid silicic acid. It is preferred to employ the so-called ture.
- the attempts have, however, failed peroxids of alkalis or of earth alkalis may be soluble silicic acid which is on the market and consists of a compound of water glass and soda, which upon being dissolved in water undergoes a hydrolytic decomposition of such nature that the silicic acid is precipitated in colloidal form. This precipitation of the silicic acid commences after a few minutes and is completed within four or five hours. Of course,.th e rapidityof this preciptation depends upon the concentration and the temperature. 'Newly precipitated aluminum hvdroxid Al(OH) +xI-I,O acts in "the same manner.
- the peroxids used in the process just described have the great advantage that the fibers are not so strongly attacked as by the other substances.
- the bleaching action of the peroxids in the present process plays merely a secondary part.
- the actionof the vperoxldson the printers ink of the paper, the oily bindin medium of which is resinified or saponifie and thus dissolved'
- the ink or soot nolonger adherin to the fiber can be absorbed by, the colloi al silicic acid.
- the said removal of printers ink can be effected in a sim le, quick and cheap manner, without the fi rs being damaged or partly destroyed, as is the case when chlorin compounds are used.
- a process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action characterized by the printed paper pulp being treated with peroxids in the presence of substances which during the process pass into a colloidal state.
- a process of removing printers ink from printed paper pulp by imeans of bleaching substances having an alkaline action characterized by the printed paper pulp being treated with an alkaline solution of a peroxid of alkali in the presence of substances which during the process pass into a colloidal state.
- a process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action characterized by the rinted aper pulp being treated with an alkaline so utlon of a peroxid of earth alkali in the presence of su stances which during the process pass into a. colloidal state.
- a process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action characterized by the printed paper pulp being treated with peroxids and a substance being already in a colloidal state.
- a process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action characterized by the printed aper pul being treated with peroxids and colloida l silicic acid.
Landscapes
- Paper (AREA)
- Paints Or Removers (AREA)
Description
UNITED} sTATEs PATENT O FIC Hneo HENKEL, or nussnnnonr, AND o'rro ens'sicnn, or AUGSBURG, GERMANY.
PROCESS FOR REMOVING PRINTERS INK FROM PRINTED PAPER BLEACHING SUBSTANCES HAVING AN ALKALINE. ACTION.
sea-era.
. No Drawing.
Specification of Letters Patent.
Application filed December 2, 1909. Serial No. 531,085.
BY MEANS or Toall whom it may concern:
Be it known that We, HUoo 'HEN EL, Ph. D., chemist, and O'r'ro Gnssnnn, director, subjects of the King of Prussia and the 5 King of Bavaria, residing Dusseldorf,
Prussia, and Augsburg, Bavaria, Germany,
have invented certain new and useful improvementsin processes for removing prin ters ink from printed paper by means of bleaching substances having an alkaline action, of which the following is a specification.
It has been attempted for a long time to use printed paper again for paper manufachitherto, owing to the printers ink adhering to the said paper, having such a great dyeing power that only infinitely small per centages of printed paper could be used for manufacturing new paper. Moreover, onl an inferior qualityaoi paper was produce It has also been attempted to remove printersink from the paper but such attempts have not given any satisfactory result. This is due chiefly to the fact that printers ink mainly consists of soot mixed with oil and settled so firmly in the slim mass, when the printed paper'is treate that it is impossibletowash it out..-
This invention relates to a process by means of whichit is possible to free the printed paper from printers ink without the above mentioned disadvantages. V
The process chiefly consists in the soaked and divided pa er being treated in an alkaline solution '0 peroxids in the"presence of substances which during the process pass into a colloidal state. As peroxids the rium superoxid BaO and the like. As col;
loidal substances, either silicic acid, already in colloidal state, can be added or compounds can be used which, during the process, pass 1 into the colloidal state, for instance silicates,
. alumina compounds and the like. The silicic acid develops ina colloid state as the hydrosol' of the acid passes over'into the hydrogel. of the acid. Fine transparent flakes are then formed which may bacalled colloid silicic acid. It is preferred to employ the so-called ture. The attempts have, however, failed peroxids of alkalis or of earth alkalis may be soluble silicic acid which is on the market and consists of a compound of water glass and soda, which upon being dissolved in water undergoes a hydrolytic decomposition of such nature that the silicic acid is precipitated in colloidal form. This precipitation of the silicic acid commences after a few minutes and is completed within four or five hours. Of course,.th e rapidityof this preciptation depends upon the concentration and the temperature. 'Newly precipitated aluminum hvdroxid Al(OH) +xI-I,O acts in "the same manner.
mIt has been found that the fat contained in-printers ink, is modified in the alkaline. solution of the superoxids 111 such "manner that it loses its binding or cementm'g iorce,
Patented Apr. 4,1911.
whereupon it becomes possible for the printers ink to be-converted.into an emulsion by the colloidal silicic acid and thus easily separated from the fibers.
' The process is carried outdt'or instance,
in such manner that the old rinted paper is stirred in warm water, whereupon the above mentioned additions olf superoxids and colloidal silicic acid, are made. After the reaction is completed, the paper mass is separated from the liquid an'd'can be further purified by additional washing.
Compared to other bleaching substances suggested for the same purposesuch. as.
Javelle water chlorid of lime and the like,
the peroxids used in the process just described, have the great advantage that the fibers are not so strongly attacked as by the other substances. The peroxids on the con: trary act throughout in a harmless manner, so that the material bleached isnot damaged. Altogether the bleaching action of the peroxids in the present process plays merely a secondary part. Of great importance is the actionof the vperoxldson the printers ink of the paper, the oily bindin medium of which is resinified or saponifie and thus dissolved' The ink or soot nolonger adherin to the fiber, can be absorbed by, the colloi al silicic acid. This actionpf gelatin can be compared to the well known process of forming an emulsion when Washing with soap, in which it is assumed that the soap is hydrolytically split in the water into free alkali and aci -fatty acid-salt, the former dissolving the dirt'while the latter incloses and removes the particles of dirt during the washing action.' A similar dissolving, ab-
sorption and easy removal of printers ink has been impossible hitherto, so that the attempts to treat newspaper again were hitherto unsuccessful.
By means of the process according to this invention the said removal of printers ink can be effected in a sim le, quick and cheap manner, without the fi rs being damaged or partly destroyed, as is the case when chlorin compounds are used.
That what we claim and desire to secure by Letters Patent is:
l. A process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action, characterized by the printed paper pulp being treated with peroxids in the presence of substances which during the process pass into a colloidal state.
2. A process of removing printers ink from printed paper pulp by imeans of bleaching substances having an alkaline action, characterized by the printed paper pulp being treated with an alkaline solution of a peroxid of alkali in the presence of substances which during the process pass into a colloidal state.
3. A process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action, characterized by the rinted aper pulp being treated with an alkaline so utlon of a peroxid of earth alkali in the presence of su stances which during the process pass into a. colloidal state.
4. A process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action, characterized by the printed paper pulp being treated with peroxids and a substance being already in a colloidal state.
5. A process for removing printers ink from printed paper pulp by means of bleaching substances having an alkaline action, characterized by the printed aper pul being treated with peroxids and colloida l silicic acid.
In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.
HUGO HENKEL. [Ls] OTTO GESSLER. Witnesses as to Hugo Henkel:
Orro Komc,
WILLY KLEIN. \Vitnesses as to Otto Gessler:
Lours MUELLER,
MATHILDE K. HELD.-
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53108509A US988874A (en) | 1909-12-02 | 1909-12-02 | Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53108509A US988874A (en) | 1909-12-02 | 1909-12-02 | Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US988874A true US988874A (en) | 1911-04-04 |
Family
ID=3057212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US53108509A Expired - Lifetime US988874A (en) | 1909-12-02 | 1909-12-02 | Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US988874A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2525594A (en) * | 1947-03-06 | 1950-10-10 | Du Pont | Deinking waste paper |
| US2582496A (en) * | 1947-10-09 | 1952-01-15 | St Regis Paper Co | Deinking and bleaching of paper |
| US3003910A (en) * | 1958-05-29 | 1961-10-10 | Degussa | Peroxidic bleach containing silicic acid ester |
| US3056713A (en) * | 1952-02-09 | 1962-10-02 | Fmc Corp | Process for the regeneration of waste paper |
| US5755926A (en) * | 1992-02-24 | 1998-05-26 | Kimberly-Clark Worldwide, Inc. | Integrated pulping process of waste paper yielding tissue-grade paper fibers |
-
1909
- 1909-12-02 US US53108509A patent/US988874A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2525594A (en) * | 1947-03-06 | 1950-10-10 | Du Pont | Deinking waste paper |
| US2582496A (en) * | 1947-10-09 | 1952-01-15 | St Regis Paper Co | Deinking and bleaching of paper |
| US3056713A (en) * | 1952-02-09 | 1962-10-02 | Fmc Corp | Process for the regeneration of waste paper |
| US3003910A (en) * | 1958-05-29 | 1961-10-10 | Degussa | Peroxidic bleach containing silicic acid ester |
| US5755926A (en) * | 1992-02-24 | 1998-05-26 | Kimberly-Clark Worldwide, Inc. | Integrated pulping process of waste paper yielding tissue-grade paper fibers |
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