WO2016054768A1 - Formulation de nettoyage pour le nettoyage en place de module de filtre à membrane incorporé à l'intérieur d'une machine à laver - Google Patents

Formulation de nettoyage pour le nettoyage en place de module de filtre à membrane incorporé à l'intérieur d'une machine à laver Download PDF

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Publication number
WO2016054768A1
WO2016054768A1 PCT/CN2014/088129 CN2014088129W WO2016054768A1 WO 2016054768 A1 WO2016054768 A1 WO 2016054768A1 CN 2014088129 W CN2014088129 W CN 2014088129W WO 2016054768 A1 WO2016054768 A1 WO 2016054768A1
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WO
WIPO (PCT)
Prior art keywords
filter module
membrane filter
cleaning
cleaning solution
washing machine
Prior art date
Application number
PCT/CN2014/088129
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English (en)
Inventor
Qixiang CAI
Peng Gao
Chengfeng WANG
Original Assignee
Dow Global Technologies Llc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dow Global Technologies Llc filed Critical Dow Global Technologies Llc
Priority to CN201480082235.8A priority Critical patent/CN106795457A/zh
Priority to PCT/CN2014/088129 priority patent/WO2016054768A1/fr
Publication of WO2016054768A1 publication Critical patent/WO2016054768A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/10—Filtering arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/33—Amino carboxylic acids
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/008—Methods for washing, rinsing or spin-drying for disinfecting the tub or the drum

Definitions

  • the invention is directed toward cleaning formulations and their use for “in-place” cleaning of polymeric membrane-based filters incorporated within washing machines.
  • washing machines for cleaning laundry and ware such glassware, tableware, flatware, dishware, cookware and the like, are well known in the art.
  • a typical washing machine includes a wash tub and an electrically operated pump which are housed in a cabinet. The tub is accessible by way of a sealable door.
  • water and detergent are combined and manipulated about the wash tub during a washing stage, after which time the resulting waste water is discharged.
  • the tub is subsequently refilled with fresh feed water in one or more rinse stages.
  • a membrane filter module may be incorporated into the washing machine so that waste water resulting from a stage passes through the filter module and is reused in the same stage or in a subsequent stage.
  • the wash cycle may include a wash stage followed by a first and second rinse stage, and waste water resulting from the first rinse stage may be continuously passed through the filter module and reused in the first rinse stage or separately used in the second rinse stage.
  • Debris including one or more of bacteria, viruses, protozoa, oils and surfactants are at least partially removed from the waste water by the filtration module.
  • the membranes within the filtration module become fouled with such debris and must be replaced or cleaned.
  • Detergents used to clean laundry and ware items are poorly suited to clean fouled membranes.
  • membrane cleaning formulations used in industrial applications are poorly suited for in-place cleaning of membrane filtration modules incorporated into washing machines where residual cleaning solution contacts components of the washing machine along with laundry or ware items.
  • the present invention includes an alkaline cleaning formulation, which when in dry form comprises from: i) 25 to 85 wt%of an organic chelant; ii) 5 to 25 wt%of an alkaline compound; and iii) 5 to 25 wt%of a surfactant.
  • the cleaning formulation may be combined with water to form an aqueous cleaning solution that is particularly suited for in-place cleaning of a membrane filter modules installed within a washing machine.
  • Fig. 1 is schematic view of an embodiment of a washing machine according to the invention.
  • the term “ware” refers to items such as glassware (e. g. bottles) , tableware, flatware (e. g. cutlery, utensils) , dishware (e. g. dishes) , cookware, (e. g. pots, pans) and other items for use with food and beverages during their preparation, storage or consumption.
  • the term “laundry” refers to items made from textiles or fabrics including items such as clothing and linens (e. g. tablecloths, bedding, towels, etc. ) .
  • the invention is particularly suited for use “in-place” cleaning of polymeric membrane-based filters incorporated within washing machines designed to wash laundry. For example, laundry is commonly soiled with both mineral and biological sources of oil.
  • the waste water generated from washing such laundry becomes contaminated with oil.
  • the oil present in the water e. g. from 1 ppm to 1000 ppm, more often from 10 ppm to 500 ppm, and even more often from 50 ppm to 200 ppm
  • FIG. 1 A schematic view of a generic embodiment of a washing machine is provided in Figure 1 where a washing machine is generally shown at (10) including a wash tub (12) adapted to temporarily house items to be cleaned. While not particularly limited, the wash tub (12) preferably includes a sealable door that provides convenient access to an inner chamber. In an embodiment designed to clean ware items, the wash tub (12) may include shelves and compartments for securing ware items during cleaning. In an embodiment designed to clean laundry, the wash tub (12) may include cylindrical drum which is capable of spinning about an axis. The wash tub (12) is in fluid communication with at least one water inlet (14) and a waste water outlet (16) .
  • the water inlet (14) is adapted to provide a route for liquid to flow into the wash tub (12) while the waste water outlet (16) provides a route for waste water to flow out of the tub (12) .
  • the inlet (14) and outlet (16) may include or be connected to valves (14’ , 16’) that selectively control ingress and egress of liquid into and out of the tub (12) .
  • the term “waste water” refers to water that has been used to either wash or rinse items within the tub (12) .
  • a fluid pathway (18) comprising one or more pipes extends from the waste water outlet (16) to the water inlet (14) .
  • a pump (20) provides a driving force for moving water along the fluid pathway (18) . As will be described below, one or more pumps may be utilized.
  • a membrane filter module (22) is located along the fluid pathway (18) . While shown as a single unit, multiple filter modules may be used in a parallel of serial arrangement.
  • the membrane filter module (22) may include a wide variety of membrane-based modules (e. g. spiral wound, hollow fiber, capillary, flat disks, and tubular membrane modules or “elements” ) .
  • Representative semi-permeable membranes include those made from: various polymers including polysulfones, polyether sulfones, polyvinylidene fluoride, polyamides, polyacrylonitrile, polyolefins, etc. Ceramic or metal membranes may also be used.
  • the membranes may be suitable in a wide range of applications including but not limited to micro filtration (MF) and ultrafiltration (UF) .
  • the module includes a plurality of semi-permeable membranes located within an inner chamber of a housing.
  • the average pore size of the hollow fiber membranes utilized within the filter module (22) may be selected so as to preferentially remove debris such as food, grease, proteins, oils and the like, e. g. average pore sizes in the microfiltration range (i. e. 0.1 to 5 micron) .
  • the average pore size of the membrane is in ultrafiltration range, (i. e. 0.01 to 0.10 micron) such that protozoa, bacteria and viruses are at least partially removed.
  • a substantially amount of surfactants can additional be removed by ultrafiltration with mean flow pore size less than 0.05 microns.
  • a plurality of semi-permeable hollow fiber membranes are orientated axially within an inner chamber. The ends of the hollow fibers are sealed from the inner chamber by way of well known “potting” techniques wherein one or both ends of the hollow fibers remain open and in fluid communication one or more outer chambers formed within an end cap assembly.
  • the filter module (22) comprises a tubular-shaped housing, (e. g. an elongated shell having a length greater than its width) , extending along an axis between two opposing ends and defining an inner chamber.
  • the outer periphery of the filter module is cylindrically-shaped having a circular cross-section.
  • the housing may be constructed from a wide variety of materials, e. g. plastics, ceramics, metals, etc. , however, in one set of preferred embodiments the housing is made from an injection moldable plastic such as polyvinyl chloride (PVC) or acrylonitrile butadiene styrene (ABS) .
  • PVC polyvinyl chloride
  • ABS acrylonitrile butadiene styrene
  • Representative examples include miniaturized versions of Dow TM UF modules SFX 2660 and SFX 2680.
  • the washing machine (10) may further include an aerator (24) in fluid communication with the filter module (22) .
  • the aerator provides a source of gas bubbles (e. g. air bubbles) to the inner chamber of the filter module which facilitates the removal of debris from the surface of membrane.
  • the aerator comprises one or more gas nozzles in fluid communication with a source of gas such as ambient air. Gas pressure may be generated by an independent pump or gas blower (not shown) . Alternatively, gas bubbles may be generated using the same pump (20) used to move water along the fluid path (18) .
  • the aerator (24) may include a valve positioned along the fluid pathway (18) which selectively opens to permit air to be drawn into the fluid pathway as water passes through the pathway, i. e. via a Venturi effect. While not shown, the aerator may also be in direct fluid communication with the wash tub (12) to provide gas bubbles to the tub during cleaning or rinse stages.
  • the washing machine includes a feed water port (26) adapted for connection to a source of water (e. g. tap water) , a waste discharge port (28) adapted for connection with an external drain, and a filter discharge port (30) adapted to an external drain.
  • a source of water e. g. tap water
  • the waste discharge port (28) and filter discharge port (30) may be combined into a single port.
  • Each port may include a valve which may be selectively opened or closed during operation.
  • the aforementioned components of the washing machine (10) are integrally housed within a cabinet (32) .
  • the filter module (22) is relatively small in size as compared with the washing machine, e. g. the volume ratio of the filter module (22) to the cabinet (32) is preferably from 1 ⁇ 20 to 1 ⁇ 1000.
  • the wash cycle may include at least one wash stage followed by at least one and preferably two rinse stages and may include at least one stage reusing water from a preceding stage that has passed through the filter module (22) .
  • Wash stages are characterized by the combination of water with a detergent or other cleaning composition whereas rinse stages generally include no detergent (although anti-scalants may be used) . That is, in a preferred embodiment, the wash cycle comprises at least one wash stage comprising the introduction of water and a detergent into the wash tub followed by at least one rinse stage wherein waste water which has passed through the filter module is reintroduced into the wash tub without adding detergent.
  • items to be cleaned are positioned within the wash tub (12) and feed water selectively enters the wash tub (12) by way the feed water port (26) .
  • Automated valves and a pump may facilitate this process so that an optimized water level is achieved.
  • Detergent or other cleaning compounds also may also be provided and the resulting wash water is sprayed, agitated or otherwise manipulated about the tub (12) to remove debris from the items.
  • the wash stage ends and the resulting waste water is drained from the tub (12) by way of the waste water outlet (16) .
  • automated valves and the pump (20) may facilitate this process.
  • the waste water may be removed from the washing machine (10) by opening waste discharge port (28) , or the waste water (or portion thereof) may be recycled by passing through the filter module (22) .
  • Water comprising feed water from the feed water port (26) or permeate passing through the membrane of the filter module (22) , or a combination of both water sources is used as rinse water and is introduced into the wash tub (12) through water inlet (14) .
  • a preferred mix ratio is at least 3 ⁇ 1 permeate to fresh feed water.
  • concentrated waste water unable to pass through the membranes may be discharged by way of the filter discharge port (30) .
  • debris is collected within the module (22) , which may be replaced on a periodic basis.
  • waste water from the wash stage is disposed of via the waste discharge port (28) , but waste water from the first rinse stage is recycled through the filter module (22) and reused.
  • the invention includes a cleaning formulation particularly suited for “in-place” methods for cleaning of polymeric membrane-based filters incorporated within washing machines.
  • the cleaning formulation may be provided in solid (e. g. granular, powder, pellet, etc. ) or liquid (e. g. gel, slurry, solution, etc. ) form.
  • solid (dry) form the cleaning formulation preferably comprises from:
  • suitable organic chelants include: amino carboxylic acids and corresponding salts, such as ethylenediamine tetraacetic acid (EDTA) and its corresponding salts (e. g. EDTA-2Na, EDTA-4Na) .
  • Other suitable chelants include sodium hexametaphosphate (SHMP) , polyacrylic acid, maleic acid, diethylene triamine pentaacetic acid, citric acid, glutamic acid, hydroxyethylethylene diaminetriacetate, and nitrilotriacetic acid, along with their corresponding salts (particularly sodium and potassium salts) .
  • suitable alkaline compounds include: alkali metal or alkaline earth metal salts (preferably water soluble salts) ; e.
  • metal hydroxides such as sodium hydroxide, potassium hydroxide, and lithium hydroxide
  • calcium hydroxide calcium oxide
  • metal carbonates such as sodium carbonate, sodium hydrogen carbonate (sodium dicarbonate) , and potassium carbonate
  • metal silicates such as sodium orthosilicate, potassium orthosilicate, sodium metasilicate, potassium metasilicate, sodium sesquisilicate, and potassium sesquisilicate
  • ethanolamines such as monoethanolamine, and diethanolamine.
  • sodium hydroxide is preferred.
  • Suitable surfactants include cationic surfactants (e. g. quaternary ammonium species) non-ionic surfactants and anionic surfactants (e. g. having a hydrocarbon tail (e. g. alkyl group) and an anionic functional group as a head, (e. g. sulfate, sulfonate, phosphate, and carboxylates)) .
  • Preferred alkyl sulfates include: ammonium lauryl sulfate, sodium dodecyl sulfate (SDS) and the related alkyl-ether sulfates sodium lauryl ether sulfate (SLES) and sodium myreth sulfate.
  • Preferred sulfonates include sodium dodecylbenzenesulfonate (SDBS) . SDBS is a preferred surfactant.
  • the cleaning formulation may further contain inorganic builders, dispersants, surfactants, de-foaming agents, scale-forming preventing agents, granulating agents, fillers, breaching agents, breaching activation agents, surface modifying agents, corrosion preventing agents, re-staining preventing agents, fluorescent brighteners, disinfectants, enzymes, fragrances, coloring agents, saccharides or saccharide acids, or their salts.
  • the invention includes an “in-place” method for cleaning a membrane filter module (22) installed within the washing machine (10) .
  • the term “in-place” means that the membrane filter module (22) remains installed within the washing machine (10) .
  • the method comprises introducing the above-mentioned cleaning formulation into the washing machine (10 (e. g. via water inlet (14) ) such that the cleaning formulation is diluted to form an aqueous cleaning solution that passes through the membrane filter module (22) .
  • the cleaning solution preferably resides within the membrane filter module for at least 30 minutes and more preferably from 30 to 120 minutes before being replaced with fresh water.
  • the cleaning solution statically resides within the module (22) such that the membrane (s) soak within the cleaning solution.
  • the cleaning solution is circulated along the fluid pathway (18) between the wash tub (12) and membrane filter module (22) .
  • the cleaning solution is driven by the pump (20) into the membrane filter module (22) intermittently from the wash tub (12) , e. g. the cleaning solution is pumped into the membrane filter module (22) and allowed to soak for 10 to 20 minutes followed by aeration of the membrane filter module (22) for 1 to 5 minutes, and thereafter the cleaning solution residual in the membrane filter module (22) is replaced by pumping the cleaning solution in the wash tub (12) and/or the fluid pathway between the wash tub (12) and the membrane filter module (22) .
  • the aqueous cleaning solution preferably includes from:
  • the cleaning solution may be heated to improve efficacy.
  • the aqueous cleaning solution is introduced into the water inlet (14) at a temperature of from 30 °C to 90°C, preferably from 50 °C to 80 °C and more preferably from 60 °C to 80 °C.
  • the membrane is preferably further cleaned by introducing gas bubbles into the membrane filter module (22) by way of the aerator (24) . Bubbles flow upward through the module (22) and dislodge debris that collects upon the surface of the membrane. The bubbles may then selectively exit the module (22) by way of filter discharge port (30) .
  • the membrane filter module (22) is aerated with gas bubbles while the aqueous cleaning solution resides within the membrane filter module (22) .
  • feed water may be periodically back-flushed through the membrane and removed from the module (22) by way of the filter discharge port (30) . Aeration may be conducted after a wash or rinse stage, or may be continuous or intermittent throughout one or more stages.
  • a laundry washing machine as described in connection with Figure 1 was operated using oily waste water (provided from ordinary laundry washing, comprising oil, dust, sebum and the oil present in the water was less than 50 ppm) to simulate repeated wash cycles with soiled laundry.
  • the permeate of the filter was circulated to the wash tub continuously. After a period of operation, the flux of the filter dropped to lower than 30%of the initial flux before filtration.
  • a cleaning formulation was then dissolved in the wash tub with tap water at 65 °C and the resulting aqueous cleaning solution was pumped into the filter module and allowed to soak for 10 minutes followed by aeration and thereafter the solution was replaced with the aqueous cleaning solution remaining in the wash tub. The process was repeated 10 times and the total time for soaking was 100 minutes. Afterwards, the aqueous solution in the filter module was replaced with fresh water.
  • the flux of the filter module was tested prior to operation with oily waste water (Flux initiate ) , after operation with oily waste water (Flux dropped ) and after cleaning (Flux recovered ) .
  • the recovery rate was calculated as (Flux recovered /Flux initiate ) *100%.
  • Table 1 The results are summarized in Table 1.
  • the cleaning formulation was a dry powder including EDTA-4Na as an organic chelant, SDBS as surfactant, NaOH as an alkaline compound, sodium citrate as a buffer, SHMP as a corrosion inhibitor and other additives.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne une formulation de nettoyage alcaline comprenant, lorsqu'elle est sous forme sèche : i) 25 à 85 % en poids d'un chélatant organique ; ii) 5 à 25 % en poids d'un composé alcalin ; et iii) 5 à 25 % en poids d'un tensioactif. La formulation de nettoyage peut être combinée avec de l'eau pour former une solution de nettoyage aqueuse qui est particulièrement appropriée pour le nettoyage en place d'un module de filtre à membrane installé à l'intérieur d'une machine à laver.
PCT/CN2014/088129 2014-10-08 2014-10-08 Formulation de nettoyage pour le nettoyage en place de module de filtre à membrane incorporé à l'intérieur d'une machine à laver WO2016054768A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480082235.8A CN106795457A (zh) 2014-10-08 2014-10-08 就地清洗并入洗涤机中的膜滤器模块用的清洗配方
PCT/CN2014/088129 WO2016054768A1 (fr) 2014-10-08 2014-10-08 Formulation de nettoyage pour le nettoyage en place de module de filtre à membrane incorporé à l'intérieur d'une machine à laver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/088129 WO2016054768A1 (fr) 2014-10-08 2014-10-08 Formulation de nettoyage pour le nettoyage en place de module de filtre à membrane incorporé à l'intérieur d'une machine à laver

Publications (1)

Publication Number Publication Date
WO2016054768A1 true WO2016054768A1 (fr) 2016-04-14

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WO (1) WO2016054768A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111514762A (zh) * 2020-04-30 2020-08-11 江门市崖门新财富环保工业有限公司 针对处理电镀废水的mbr中空纤维膜清洗剂及强制循环清洗方法

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CN1243538A (zh) * 1997-01-13 2000-02-02 埃科莱布有限公司 含有混合的有机和无机螯合剂以改善去污性的碱性洗涤剂
CN101210212A (zh) * 2006-12-29 2008-07-02 上海和黄白猫有限公司 洗衣机专用清洗剂
CN101248168A (zh) * 2005-07-01 2008-08-20 水株式会社 衣料的洗涤方法及用于该方法的洗涤剂组合物
CN103556435A (zh) * 2013-11-07 2014-02-05 乐金电子研发中心(上海)有限公司 实现水循环利用的洗衣机和洗衣方法

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CN1153207A (zh) * 1995-11-20 1997-07-02 罗姆和哈斯公司 清洗浓缩物和制法
DE69910926T2 (de) * 1998-01-22 2004-07-22 Miz Co., Ltd., Fujisawa Waschverfahren
CN100503799C (zh) * 2006-06-09 2009-06-24 上海制皂有限公司 洗衣机槽清洗剂
CN202860901U (zh) * 2012-09-28 2013-04-10 陶氏环球技术有限责任公司 包括一体过滤器模块和充气装置的洗涤机器

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CN1243538A (zh) * 1997-01-13 2000-02-02 埃科莱布有限公司 含有混合的有机和无机螯合剂以改善去污性的碱性洗涤剂
CN101248168A (zh) * 2005-07-01 2008-08-20 水株式会社 衣料的洗涤方法及用于该方法的洗涤剂组合物
CN101210212A (zh) * 2006-12-29 2008-07-02 上海和黄白猫有限公司 洗衣机专用清洗剂
CN103556435A (zh) * 2013-11-07 2014-02-05 乐金电子研发中心(上海)有限公司 实现水循环利用的洗衣机和洗衣方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111514762A (zh) * 2020-04-30 2020-08-11 江门市崖门新财富环保工业有限公司 针对处理电镀废水的mbr中空纤维膜清洗剂及强制循环清洗方法

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