CN104651550A - Method for cleaning used leather with supercritical carbon dioxide - Google Patents
Method for cleaning used leather with supercritical carbon dioxide Download PDFInfo
- Publication number
- CN104651550A CN104651550A CN201310586493.7A CN201310586493A CN104651550A CN 104651550 A CN104651550 A CN 104651550A CN 201310586493 A CN201310586493 A CN 201310586493A CN 104651550 A CN104651550 A CN 104651550A
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- China
- Prior art keywords
- leather
- carbon dioxide
- cleaning
- high pressure
- supercritical carbon
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Classifications
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a method for cleaning used leather with supercritical carbon dioxide and provides the method for cleaning the used leather with the supercritical carbon dioxide being simple in use and environmental-friendly. The method includes following steps: (1) placing the to-be-cleaned used leather in a high pressure kettle, feeding carbon dioxide to the high pressure kettle to enable the pressure in the high pressure kettle to be 7.5-30 MPa and the temperature in the high pressure kettle to be 30-110 DEG C; and (2) stirring the to-be-cleaned used leather to remove pollutants. The used leather includes glazed leather, fluffy leather, ground leather, fur leather or double face leather and the like. For achieving the cleaning effect better, the method also can comprise following steps: (1) adding a co-solvent, or a clean decontamination material, a fat-liquoring softening material or a disinfecting and sterilizing material according to the amount of the to-be-cleaned used leather before feeding the carbon dioxide; and (2) adding the clean decontamination material, the fat-liquoring softening material or the disinfecting and sterilizing material, which are toxic-free, harmless and easy to biodegrade, during the cleaning process for optimization compatibility. In addition, the method can also be carried out by directly adding plant raw materials including the components, so that the components can be extracted out through the supercritical carbon dioxide and are directly used for acting on the leather.
Description
Technical field
The present invention relates to the purging method of old leather, be specifically related to a kind of method of cleaning old leather by overcritical carbon dioxide.
Background technology
Along with the development of leather industry, the kind of leatherware gets more and more, and divides, can be divided into again multiple, as slick-surfaced leather, leather, frosted leather, fur coat leather, double-face leather leather etc. by condition of surface.Various leatherware is in dress and use procedure, due to the joint effect by environmental factors and human body itself, make leatherware along with the increase of duration of service, leather hand feeling can be hardening to some extent, the various pollutents such as various spot, sweat stain, greasy dirt, mildew, dust can be stained with in leatherware surface, not only affect the outward appearance of leatherware but also the more important thing is the health service requirements affecting leatherware, containing mould, virus and other objectionable impurities on the leather speckling with various spot.For wearing overlong time, slick-surfaced leather clothes inside and outside dirty all especially severes, are not suitable for conventional cleaning, for leatherwears such as matte, frosted, double-face leathers, because it is dust-proof, antifouling property is poor, easily dirty, are more not suitable for conventional cleaning.Deep layer sterilising treatment must be taked, thoroughly could remove dirty, the mildew in leather, mould etc., to keep the greenization of leather state-cleaning, softness, comfortable, ventilative, fresh and clean etc.At present, WATER-WASHING METHOD and dry cleaning process two kinds can generally be had to the method that leatherware carries out deep layer cleaning.
WATER-WASHING METHOD is at present in the world to the direction of leatherwear washing methods research, and WATER-WASHING METHOD solvent used is water, and it is the safest beyond doubt, the material of most health, for solid basis has been established in cleaning cleaning greenization.Washing clean is implemented to leatherware and can reach and keep the effects such as leather is cleaner, soft, but WATER-WASHING METHOD is only ideal to the cleaning performance of slick-surfaced leather goods.And the goods after cleaning also need drying, aforesaid method not only uses large water gaging and solvent, and need process a large amount of waste water solvent, the domestic cleaning to leatherware at present, only rest on the cleaning to slick-surfaced leather goods, and the poor performance of material therefor, Technology is also very backward.Along with the continuous progress of tanning technology, picture velour, frosted clothing leather, FUR GARMENT, double-face leather clothes, corium sofa, corium seat cushions, and the product such as various stamp leather and colorant match leather continues to bring out, and product is also more and more superior, the leather cleaning technique fallen behind, obviously can not meet the cleaning of the leatherware these being had to special performance.So the research to leather cleaning material and cleaning technology, be the needs in market, the needs of leather industry development especially.Along with global greenization tide and the Chinese government are to the attention of green chemistry and technology, in process hides, shoemaking, leather goods etc. are produced, start the research of paying attention to producing greenization.Leatherware, in use and cleaning process, more will advocate the clean-out system and cleaning technique that use greenization.
Summary of the invention the technical problem to be solved in the present invention is the shortcoming and defect overcoming above-mentioned prior art, provides a kind of method with easy and environment amenable cleaning old leather by overcritical carbon dioxide.The method of a kind of cleaning old leather by overcritical carbon dioxide of the present invention, comprises the following steps:
(1) be placed in autoclave by old leather to be cleaned, carbonic acid gas is inputted autoclave, make still internal pressure be 7.5MPa ~ 30MPa, temperature is 30 DEG C ~ 110 DEG C; (2) stir removal pollutent, described old leather comprises slick-surfaced leather, leather, frosted leather, fur coat leather or double-face leather leather etc.; In order to realize cleaning performance better, the present invention also can comprise the following steps: before input carbonic acid gas, add cosolvent or clean decontamination material, stuffing flexible material, sterilization material according to the amount of the leather that will clean; Add in cleaning process and select nontoxic, harmless, the clean decontamination material of readily biodegradable, stuffing flexible material, sterilization material to be optimized compatibility.Also directly can add the plant material containing above composition, be extracted by supercritical co and directly act on leather; Compared with prior art, the present invention has the following advantages and beneficial effect: (1) the present invention does not need a large amount of water and washing composition, again can convection drying after having cleaned, therefore can save energy, and environmentally friendly; (2) the Distance geometry interaction of molecules characteristic between the molecule of supercritical co and liquid CO
2close, density and liquid CO
2quite, to the organic dirt of leather surface and some mineral contaminants, there is stronger dissolving power.Can effectively remove leather surface dirt on the one hand, on the other hand also easily via regulating pressure by dirt and SCCO
2be separated, and without the need to drying after cleaning, noresidue.There is great engineer applied be worth and environment protection meaning.
(3) the present invention is easy to operate, simple.
Embodiment
Be further detailed the present invention below in conjunction with embodiment, the present embodiment is to concrete detailed description of the present invention, does not make any restriction to the present invention.
Embodiment 1
Object light leather to be washed is placed in autoclave, liquid carbon dioxide is inputted in this autoclave, utilize transferpump that pressure carbon dioxide is forced into 7.5MPa.Through well heater, carbon dioxide temperature is being heated to 45 DEG C, is starting magnetic agitation and remove pollutent; Carbon dioxide pollution thing is through reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on bottom, and pollutent can through adsorption filter collection and treatment; The carbonic acid gas of process filtration is through condenser or be compressed into liquid, enters carbon dioxide storage tank recovery and re-uses or emit.
Embodiment 2
To treat that washing leather is placed in autoclave, liquid carbon dioxide be inputted in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 11.5MPa.Through well heater, carbon dioxide temperature is being heated to 30 DEG C.Add cosolvent ethanol in autoclave, start magnetic agitation and remove pollutent; Oxidize carbon contamination is through reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on bottom, and pollutent can through adsorption filter collection and treatment; The carbonic acid gas of process filtration is through condenser or be compressed into liquid, enters carbon dioxide storage tank recovery and re-uses or emit; Step-down discharge carbonic acid gas and pollutent reuse fresh carbon dioxide and clean, and will treat that washing leather takes out after cleaning.
Embodiment 3
To treat that washing frosted leather is placed in autoclave, and liquid carbon dioxide be inputted in this autoclave, utilize transferpump that pressure carbon dioxide is forced into 15.5MPa.Through well heater, carbon dioxide temperature is being heated to 40 DEG C.Add Chinese honey locust in autoclave, start magnetic agitation and remove pollutent; Carbon dioxide pollution thing is through reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on bottom, and pollutent can through adsorption filter collection and treatment; The carbonic acid gas of process filtration is through condenser or be compressed into liquid, enters carbon dioxide storage tank recovery and re-uses or emit.
Embodiment 4
To treat that washing fur coat leather is placed in autoclave, and liquid carbon dioxide be inputted in this autoclave, utilize transferpump that pressure carbon dioxide is forced into 16MPa.Through well heater, carbon dioxide temperature is being heated to 35 DEG C.Start magnetic agitation and remove pollutent; Carbon dioxide pollution thing is through reducing valve step-down; After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on bottom, and pollutent can through adsorption filter collection and treatment; The carbonic acid gas of process filtration is through condenser or be compressed into liquid, enters carbon dioxide storage tank recovery and re-uses or emit; Step-down discharge carbonic acid gas and pollutent reuse fresh carbon dioxide and clean, and will treat that washing leather takes out after cleaning.
Claims (3)
1. the method for a cleaning old leather by overcritical carbon dioxide, it is characterized in that, comprise the following steps: old leather to be cleaned is placed in autoclave by (1), and carbonic acid gas is inputted autoclave, and making still internal pressure be 7.5MPa ~ 30MPa, temperature is 30 DEG C ~ 45 DEG C; (2) removal pollutent is stirred.
2. the method for a kind of cleaning old leather by overcritical carbon dioxide according to claim 1, it is characterized in that, also can comprise the following steps: before input carbonic acid gas, add cosolvent or clean decontamination material, stuffing flexible material, sterilization material according to the amount of the leather that will clean.
3. the method for a kind of cleaning old leather by overcritical carbon dioxide according to claims 1 or 2, is characterized in that, described old leather comprises slick-surfaced leather, leather, frosted leather, fur coat leather or double-face leather leather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586493.7A CN104651550A (en) | 2013-11-21 | 2013-11-21 | Method for cleaning used leather with supercritical carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586493.7A CN104651550A (en) | 2013-11-21 | 2013-11-21 | Method for cleaning used leather with supercritical carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104651550A true CN104651550A (en) | 2015-05-27 |
Family
ID=53243187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310586493.7A Pending CN104651550A (en) | 2013-11-21 | 2013-11-21 | Method for cleaning used leather with supercritical carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104651550A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007031786A1 (en) * | 2005-09-17 | 2007-03-22 | Reckitt Benckiser (Uk) Limited | Applicator, kit, and process |
| CN101161824A (en) * | 2007-11-22 | 2008-04-16 | 中国科学院广州化学研究所 | Method for cleaning old leather by overcritical carbon dioxide |
| CN101270398A (en) * | 2008-05-13 | 2008-09-24 | 郑州大学 | Method for implementing leather fibre areosis and expansion by using supercritical carbonic anhydride |
-
2013
- 2013-11-21 CN CN201310586493.7A patent/CN104651550A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007031786A1 (en) * | 2005-09-17 | 2007-03-22 | Reckitt Benckiser (Uk) Limited | Applicator, kit, and process |
| CN101161824A (en) * | 2007-11-22 | 2008-04-16 | 中国科学院广州化学研究所 | Method for cleaning old leather by overcritical carbon dioxide |
| CN101270398A (en) * | 2008-05-13 | 2008-09-24 | 郑州大学 | Method for implementing leather fibre areosis and expansion by using supercritical carbonic anhydride |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |