CN101161824B - Method for cleaning old leather by overcritical carbon dioxide - Google Patents
Method for cleaning old leather by overcritical carbon dioxide Download PDFInfo
- Publication number
- CN101161824B CN101161824B CN200710031587A CN200710031587A CN101161824B CN 101161824 B CN101161824 B CN 101161824B CN 200710031587 A CN200710031587 A CN 200710031587A CN 200710031587 A CN200710031587 A CN 200710031587A CN 101161824 B CN101161824 B CN 101161824B
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- Prior art keywords
- leather
- carbon dioxide
- cleaning
- autoclave
- carbonic acid
- 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.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000010985 leather Substances 0.000 title claims abstract description 78
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 43
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 43
- 238000004140 cleaning Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 235000011089 carbon dioxide Nutrition 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 15
- 238000005202 decontamination Methods 0.000 claims description 5
- 230000003588 decontaminative effect Effects 0.000 claims description 5
- 230000001954 sterilising effect Effects 0.000 claims description 4
- 239000006184 cosolvent Substances 0.000 claims description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000356 contaminant Substances 0.000 abstract description 2
- 239000003599 detergent Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 4
- 238000005406 washing Methods 0.000 description 18
- 239000007788 liquid Substances 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 238000005108 dry cleaning Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000013019 agitation Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000931143 Gleditsia sinensis Species 0.000 description 2
- 239000011538 cleaning material Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 208000036822 Small cell carcinoma of the ovary Diseases 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 244000089698 Zanthoxylum simulans Species 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 201000005292 ovarian small cell carcinoma Diseases 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 235000019633 pungent taste Nutrition 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides a simple and environmental friendly waste leather cleaning method by supercritical carbon dioxide. The method includes the following steps: (1) waste leather to be cleaned is put in an autoclave and carbon dioxide is also fed into the autoclave; moreover, the pressure inside the autoclave is kept at 7.5MPa to 30MPa and the temperature is kept between 30 DEG C and 110 DEG C; (2) contaminant is removed through stirring. The method can effectively clean waste leather without a great deal of water and detergent; moreover, the waste leather can be dried directly after cleaning without residue, thereby saving energy sources and being environmental friendly; meanwhile, the method has the advantages of simplicity and convenience for operation.
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 continuous development of leather industry, the kind of leatherware is more and more, by the condition of surface branch, can be divided into again multiple, as slick-surfaced leather, leather, frosted leather, fur coat leather, double-face leather leather etc.Various leatherware are in dress and use, owing to be subjected to influencing jointly of environmental factors and human body itself, make the increase of leatherware along with duration of service, leather hand feeling is hardening to some extent, all contaminations such as various spots, sweat stain, greasy dirt, mildew, dust can be stained with in the leatherware surface, not only influencing the outward appearance of leatherware but also the more important thing is influences the service requirements of the health of leatherware, speckles with on the leather of various spots to contain mould, virus and other objectionable impurities.
In leatherware cleans,, then to take different cleaning cleanings at different varieties, different degree of fouling.Clean at dirty not too serious leatherware.Method is to dip in cleaning material with brush to clean leatherware, or with cotton or the direct wiping of towel.Cleaning decontamination material mainly is washing composition and washing auxiliary detergent.The cleaning decontamination material of selecting for use is based on nonionic surface active agent, and aniorfic surfactant is auxilliary.Though these products use simply, convenience, directly brush in leather surface and water flushing and just can.But wherein all contain stearate mostly, this material not only has pungency but also not biodegradable to people's skin, thereby its use is very limited.
For wearing overlong time, the about dirty all especially severes of slick-surfaced leather clothes, be not suitable for conventional the cleaning, for leatherwears such as matte, frosted, double-face leathers,, more be not suitable for conventional the cleaning because it is dustproof, antifouling property is relatively poor, dirty easily.Must take the deep layer sterilising treatment, could thoroughly remove dirty, mildew in the leather, mould etc., with greenization state-cleaning of keeping leather, softness, comfortable, ventilative, fresh and clean etc.At present, two kinds of WATER-WASHING METHOD and dry cleaning processs can generally be arranged to the method that leatherware carries out deep layer cleaning.
China's leather cleans market and selects dry cleaning process usually for use at present, dry cleaning process is with organic solvent leatherware to be washed, its advantage is can clean totally to the spot on leather two sides, but defective is also very outstanding, the one, the employed clean-out system of dry cleaning process all is an organic solvent, wherein major part is volatile certain toxic organic solvent that has, and human body and environment are had certain murder by poisoning.The dry-cleaning equipment that China produces use at present mostly is the open-type dry cleaning machine greatly, is not environment-friendly type.If operator and user of service are more indifferent to environmental protection, awareness of safety, can necessarily endanger human body and environment structure unavoidably.The 2nd, the leather that adopts this technology to clean because when cleaning greasy dirt, solvent also takes off terribly to the grease of leather inside, causes the leather hand feeling plate that becomes hard, and the flexibility of fur clothing itself, comfortableness are damaged.
On the other hand, some organic dry cleaning compositions during leatherware, are being removed smeary simultaneously in dry-cleaning, and greases a large amount of in the leather are lost, and cause the leather oil starvation serious, also are difficult to reach the original softness of leather, performance such as comfortable even implement stuffing again.
WATER-WASHING METHOD is at present in the world to the direction of leatherwear washing methods research, and the used solvent of WATER-WASHING METHOD is a water, and it is the safest beyond doubt, the material of health, has established solid basis for cleaning greenization.Leatherware is implemented the washing clean can reach and keep effects such as leather is cleaner, softness, but WATER-WASHING METHOD is only comparatively desirable to the cleaning performance of slick-surfaced leather goods.And the goods after cleaning also need dry.
Aforesaid method not only uses big water gaging and solvent, and needs to handle a large amount of waste water solvents, and domestic cleaning to leatherware at present only rests on the cleaning to the slick-surfaced leather goods, and the poor performance of material therefor, and Technology is also very backward.Continuous progress along with tanning technology, picture velour, frosted clothing leather, FUR GARMENT, double-face leather clothes, corium sofa, corium seat cushions, and products such as various stamp leather and colorant match leather continue to bring out, and product is also more and more superior, the leather cleaning technique that falls behind does not obviously satisfy the cleaning that these is had the leatherware of special performance.So to leather cleaning material and cleaning Study on Technology, be the needs in market, the needs of leather industry development especially.Along with the attention of global greenization tide and the Chinese government, in process hides, shoemaking, leather goods etc. are produced, begun to pay attention to the research that greenization is produced to Green Chemistry and technology.Leatherware more will be advocated the clean-out system and the cleaning technique that use greenization in use and cleaning process.
Have not yet to see the relevant report that utilizes the super critical CO 2 technology cleaning old leather.
Summary of the invention
The technical problem to be solved in the present invention is the shortcoming and defect that overcomes above-mentioned prior art, and the method for the easy and environment amenable cleaning old leather by overcritical carbon dioxide of a kind of usefulness is provided.The method of a kind of cleaning old leather by overcritical carbon dioxide of the present invention may further comprise the steps:
(1) old leather to be cleaned is placed in the autoclave, carbonic acid gas is imported autoclave, making the still internal pressure is 7.5MPa～30MPa, and temperature is 30 ℃～110 ℃;
(2) stir the 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 may further comprise the steps: the amount according to the leather that will clean before the input carbonic acid gas adds cosolvent or cleans decontamination material, stuffing flexible material, sterilization material.
In cleaning process, add and select for use nontoxic, harmless, the cleaning decontamination material of readily biodegradable, stuffing flexible material, sterilization material to be optimized compatibility.Also can directly add the plant material that contains above composition, by supercritical co it be extracted 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, but convection drying again after having cleaned, therefore can save energy, and environmentally friendly;
(2) distance between the molecule of supercritical co and interaction of molecules characteristic and liquid CO
2Close, density and liquid CO
2Quite, organic dirt and some mineral contaminants to leather surface have stronger dissolving power.Can remove the leather surface dirt effectively on the one hand, also be easy on the other hand by regulating pressure with dirt and SCCO
2Separate, and clean back drying-free, noresidue.Have great engineering using value and environment protection meaning;
(3) the present invention is easy to operate, and is simple.
Embodiment
Below in conjunction with embodiment the present invention is further detailed, present embodiment is to concrete detailed description of the present invention, the present invention is not made any restriction.
Embodiment 1
To treat that the washing slick-surfaced leather places in the autoclave, liquid carbon dioxide will be imported in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 7.5MPa.Through well heater the carbonic acid gas temperature is being heated to 45 ℃, is starting magnetic agitation and remove pollutent.
The carbon dioxide pollution thing is through the reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on the bottom, and pollutent can be through the adsorption filter collection and treatment.
The filtering carbonic acid gas of process is through condenser or be compressed into liquid, enters the carbon dioxide storage tank recovery and re-uses or emit.
Embodiment 2
To treat that the washing leather places in the autoclave, liquid carbon dioxide will be imported in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 11.5MPa.Through well heater the carbonic acid gas temperature is being heated to 30 ℃.Add cosolvent ethanol in autoclave, start magnetic agitation and remove pollutent.
The carbon dioxide pollution thing is through the reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on the bottom, and pollutent can be through the adsorption filter collection and treatment.
The filtering carbonic acid gas of process is through condenser or be compressed into liquid, enters the carbon dioxide storage tank recovery and re-uses or emit.
Step-down discharging carbonic acid gas and pollutent reuse fresh carbon dioxide and clean, and will treat after cleaning that the washing leather takes out.
Embodiment 3
To treat that washing frosted leather places in the autoclave, liquid carbon dioxide will be imported in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 15.5MPa.Through well heater the carbonic acid gas temperature is being heated to 40 ℃.Add Chinese honey locust in autoclave, start magnetic agitation and remove pollutent.
The carbon dioxide pollution thing is through the reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on the bottom, and pollutent can be through the adsorption filter collection and treatment.
The filtering carbonic acid gas of process is through condenser or be compressed into liquid, enters the carbon dioxide storage tank recovery and re-uses or emit.
Embodiment 4
To treat that washing fur coat leather places in the autoclave, liquid carbon dioxide will be imported in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 16MPa.Through well heater the carbonic acid gas temperature is being heated to 35 ℃.Start magnetic agitation and remove pollutent.
The carbon dioxide pollution thing is through the reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on the bottom, and pollutent can be through the adsorption filter collection and treatment.
The filtering carbonic acid gas of process is through condenser or be compressed into liquid, enters the carbon dioxide storage tank recovery and re-uses or emit.
Step-down discharging carbonic acid gas and pollutent reuse fresh carbon dioxide and clean, and will treat after cleaning that the washing leather takes out.
Embodiment 5
To treat that washing double-face leather leather leather places in the autoclave, liquid carbon dioxide will be imported in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 25MPa.Through well heater the carbonic acid gas temperature is being heated to 35 ℃, is starting magnetic agitation and remove pollutent.
The carbon dioxide pollution thing is through the reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on the bottom, and pollutent can be through the adsorption filter collection and treatment.
The filtering carbonic acid gas of process is through condenser or be compressed into liquid, enters the carbon dioxide storage tank recovery and re-uses or emit.
Embodiment 6
To dirtylier treat that the washing leather places in the autoclave, liquid carbon dioxide will be imported in this autoclave, and utilize transferpump that pressure carbon dioxide is forced into 9.5MPa.Through well heater the carbonic acid gas temperature is being heated to 110 ℃.Add Chinese honey locust, Chinese prickly ash in autoclave, start magnetic agitation and remove pollutent.
The carbon dioxide pollution thing is through the reducing valve step-down.After entering holding tank, the carbon dioxide pollution thing of step-down is deposited on the bottom, and pollutent can be through the adsorption filter collection and treatment.
The filtering carbonic acid gas of process is through condenser or be compressed into liquid, enters the carbon dioxide storage tank recovery and re-uses or emit.
Step-down discharging carbonic acid gas and pollutent can use fresh carbon dioxide to clean once more, will treat after cleaning that the washing leather takes out.
Claims (3)
1. the method for a cleaning old leather by overcritical carbon dioxide is characterized in that, may further comprise the steps:
(1) old leather to be cleaned placed in the autoclave, carbonic acid gas is imported autoclave, and to make the still internal pressure is 7.5MPa～30MPa that temperature is 30 ℃～45 ℃;
(2) stir the removal pollutent.
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 may further comprise the steps: the amount according to the leather that will clean before the input carbonic acid gas adds cosolvent or cleans decontamination material, stuffing flexible material, sterilization material.
3. according to the method for claim 1 or 2 described a kind of cleaning old leather by overcritical carbon dioxide, it 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 |
|---|---|---|---|
| CN200710031587A CN101161824B (en) | 2007-11-22 | 2007-11-22 | Method for cleaning old leather by overcritical carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710031587A CN101161824B (en) | 2007-11-22 | 2007-11-22 | Method for cleaning old leather by overcritical carbon dioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101161824A CN101161824A (en) | 2008-04-16 |
| CN101161824B true CN101161824B (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710031587A Expired - Fee Related CN101161824B (en) | 2007-11-22 | 2007-11-22 | Method for cleaning old leather by overcritical carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101161824B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651550A (en) * | 2013-11-21 | 2015-05-27 | 谈丽娜 | Method for cleaning used leather with supercritical carbon dioxide |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333400A (en) * | 2000-12-14 | 2002-01-30 | 孙传经 | Supercritical carbon dioxide dry cleaner |
| CN1671905A (en) * | 2002-07-24 | 2005-09-21 | 斯托克印刷公司 | Device and method for the piece-wise or batch-wise refining of pieces of a substrate, in particular a textile substrate, under high pressure |
| WO2007031786A1 (en) * | 2005-09-17 | 2007-03-22 | Reckitt Benckiser (Uk) Limited | Applicator, kit, and process |
-
2007
- 2007-11-22 CN CN200710031587A patent/CN101161824B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333400A (en) * | 2000-12-14 | 2002-01-30 | 孙传经 | Supercritical carbon dioxide dry cleaner |
| CN1671905A (en) * | 2002-07-24 | 2005-09-21 | 斯托克印刷公司 | Device and method for the piece-wise or batch-wise refining of pieces of a substrate, in particular a textile substrate, under high pressure |
| WO2007031786A1 (en) * | 2005-09-17 | 2007-03-22 | Reckitt Benckiser (Uk) Limited | Applicator, kit, and process |
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| Publication number | Publication date |
|---|---|
| CN101161824A (en) | 2008-04-16 |
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Granted publication date: 20100519 Termination date: 20131122 |