WO2007050291A1 - Methods for cleaning industrial equipment with pre-treatment - Google Patents

Methods for cleaning industrial equipment with pre-treatment Download PDF

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Publication number
WO2007050291A1
WO2007050291A1 PCT/US2006/039726 US2006039726W WO2007050291A1 WO 2007050291 A1 WO2007050291 A1 WO 2007050291A1 US 2006039726 W US2006039726 W US 2006039726W WO 2007050291 A1 WO2007050291 A1 WO 2007050291A1
Authority
WO
WIPO (PCT)
Prior art keywords
acid
treatment
solution
treatment solution
soil
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.)
Ceased
Application number
PCT/US2006/039726
Other languages
English (en)
French (fr)
Inventor
Peter J. Fernholz
Brandon L. Herdt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ecolab Inc
Original Assignee
Ecolab Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37607199&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2007050291(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to BRPI0615774A priority Critical patent/BRPI0615774B1/pt
Priority to PL06825761T priority patent/PL1948774T5/pl
Priority to NZ565897A priority patent/NZ565897A/en
Priority to CA2619007A priority patent/CA2619007C/en
Priority to AU2006306652A priority patent/AU2006306652B2/en
Application filed by Ecolab Inc filed Critical Ecolab Inc
Priority to DK06825761.7T priority patent/DK1948774T4/en
Priority to JP2008537741A priority patent/JP4927858B2/ja
Priority to EP06825761.7A priority patent/EP1948774B2/en
Publication of WO2007050291A1 publication Critical patent/WO2007050291A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J25/00—Cheese-making
    • A01J25/12—Forming the cheese
    • A01J25/126—Cleaning cheese making equipment
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J7/00—Accessories for milking machines or devices
    • A01J7/02—Accessories for milking machines or devices for cleaning or sanitising milking machines or devices
    • A01J7/022—Clean-in-Place Systems, i.e. CIP, for cleaning the complete milking installation in place
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08—Cleaning containers, e.g. tanks
    • 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
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols
    • 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
    • C11D3/042—Acids
    • 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
    • C11D3/044—Hydroxides or bases
    • 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
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2003—Alcohols; Phenols
    • 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
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • 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
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2079—Monocarboxylic acids-salts thereof
    • 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
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3947—Liquid compositions
    • 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
    • C11D3/43—Solvents
    • 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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/265—Carboxylic acids or salts thereof
    • 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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/40—Specific cleaning or washing processes
    • C11D2111/44—Multi-step processes

Definitions

  • the invention relates to cleaning of industrial equipment such as evaporators, heat exchangers and other such equipment that is conventionally cleaned using a CIP (clean- in-place) process.
  • CIP clean- in-place
  • evaporators There are many different types of evaporators including falling film evaporators, forced circulation evaporated evaporators, plate evaporators, circulation evaporators, fluidized bed evaporators, falling film short path evaporators, rising film evaporators, counterflow-trickle evaporators, stirrer evaporators, and spiral tube evaporators.
  • evaporators there are several other pieces of equipment in an evaporation plant including preheaters and heaters, separators, condensers, deaeration/vacuum systems, pumps, cleaning systems, vapor scrubbers, vapor recompression systems, and condensate polishing systems. All of the evaporation plant equipment should be cleaned, however, the actual evaporator typically has the most difficult soiling problems.
  • the invention relates to methods of cleaning equipment such as heat exchangers, evaporators, tanks and other industrial equipment using clean-in-place procedures.
  • the method is suitable for organic soil removal or, more particularly, for food or beverage soil removal.
  • the method relates to cleaning processes for removing carbohydrate and proteinaceous soils from food and beverage manufacturing locations using a clean-in-place method.
  • the present invention is directed to cleaning of industrial equipment using a pre- treatment step in combination with clean-in-place procedures.
  • Use of a pre-treatment step in combination with conventional clean-in-place solutions and processes, provides increased soil removal than the conventional process alone. Additionally, use of a pre- treatment step, followed by a water rinse, provided unexpected amounts of soil removal.
  • Use of a pre-treatment step allows the use of traditionally incompatible chemistries and at higher concentrations then applied in conventional cleaning programs.
  • Process 10 includes a tank 20, which is the equipment to be cleaned.
  • a feed line 25 supplies the various cleaning solutions to tank 20, and a drain line 27 removes solution from tank 20.
  • Operably connected via appropriate pipes, valves, pumps, etc. is equipment for a CIP process, designated as reference numeral 30.
  • CIP process 30 includes a tank 35 for retaining the dilute CIP chemistry. Drain line 27 from tank 20 is used to recirculate solution from tank 20 back to CIP process 30 and tank 35.
  • the pre-treatment solution optionally and preferably includes alkaline or acidic ingredients.
  • suitable alkaline sources include basic salts, amines, alkanol amines, carbonates and silicates.
  • Particularly preferred alkaline sources include NaOH (sodium hydroxide), KOH (potassium hydroxide), TEA (triethanol amine), DEA (diethanol amine), MEA (monoethanolamine), sodium carbonate, and morpholine, sodium metasilicate and potassium silicate.
  • the amount of alkaline or acid in the pre-treatment solution in some cases is at least 0.25 wt-% and no greater than 10 wt-%.
  • Suitable levels of alkaline or acid include 2 to 5 wt-% and 0.5 to 1.5 wt-%.
  • a penetrant may be present in the pre-treatment solution.
  • the penetrant may be combined with an alkaline or acid source in the solution, or, the penetrant may be used without an alkaline or acid source.
  • the penetrant is water miscible.
  • suitable penetrants include alcohols, short chain ethoxylated alcohols and phenol (having 1-6 ethoxylate groups).
  • Organic solvents are also suitable penetrants.
  • suitable organic solvents, for use as a penetrant include esters, ethers, ketones, amines, and nitrated and chlorinated hydrocarbons.
  • Silicone surfactants can also be used. Additional suitable nonionic surfactants having a polyalkylene oxide polymer portion include nonionic surfactants of C 6 -C 24 alcohol ethoxylates having 1 to about 20 ethylene oxide groups; C 6 -C 24 alkylphenol ethoxylates having 1 to about 100 ethylene oxide groups; C 6 -C 24 alkylpolyglycosides having 1 to about 20 glycoside groups; C 6 -C 24 fatty acid ester ethoxylates, propoxylates or glycerides; and C 4 -C 24 mono or dialkanolamides.
  • Particularly preferred builders include EDTA (including tetra sodium EDTA), TKPP (tripotassium polyphosphate), PAA (polyacrylic acid) and its salts, phosphonobutane carboxylic acid, and sodium gluconate.
  • EDTA including tetra sodium EDTA
  • TKPP tripotassium polyphosphate
  • PAA polyacrylic acid
  • phosphonobutane carboxylic acid and sodium gluconate.
  • pre-treatment solution is stored at the equipment designated as 40.
  • tank 42 holds an alkaline pre-treatment solution and tank 44 holds an acidic pre-treatment solution that includes peroxide.
  • tank 20 and its connection lines are drained of any product that may be present.
  • a water rinse may be included to remove any residual product.
  • alkaline pre-treatment solution from tank 42 is pumped via piping and feed line 25 into tank 20.
  • Conventional CIP application equipment such as a spray head, applies the pre-treatment solution onto the interior surface of tank 20.
  • the pre-treatment solution cascades or otherwise flows down the surface of tank 20, softening the soil.
  • a second application of pre-treatment solution may be applied, although this is not generally needed.
  • the pre-treatment solution can be introduced at the CIP balance tank.
  • the pre-treatment solution can be introduced in the valves between recirculation pump and the distillation column, or the CIP balance tank. The pre-treatment solution is preferably injected closer to the surface to be cleaned. This allows for higher chemical concentrations by avoiding dilution of the pre-treatment chemistry by the entire volume of the CIP supply tank and distribution lines.
  • a 10 wt-% solution of active NaOH was prepared and used as a pre-treatment.
  • the pre-treatment had 100,000 ppm sodium hydroxide (an alkaline cleaner).
  • Pre-Treatment 2 A pre-treatment solution was prepared having 1360 ppm tetra sodium EDTA (a builder and/or chelant), 3000 ppm sodium gluconate (a builder and/or chelant), 2400 ppm potassium silicate (an alkaline cleaner), 7000 ppm alkyl polyglycoside (a surfactant), and 4200 ppm potassium hydroxide (an alkaline cleaner).
  • This Pre-Treatment 2 had 3.66% alkaline, 0.43% builder/chelant, and 0.7% surfactant, providing 4.79% active ingredients.
  • Pre-Treatment 3 A pre-treatment solution was prepared having 1360 ppm tetra sodium EDTA (a builder and/or chelant), 3000 ppm sodium gluconate (a builder
  • Table 4 shows that including a hydrogen peroxide based pre-treatment composition together with a sodium hydroxide wash cuts the time to clean whole milk soil in half when compared to a sodium hydroxide wash alone.
  • Using Formula A together with a sodium hydroxide wash cuts the time to clean whole milk soil by more than half when compared to sodium hydroxide wash alone.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Emergency Medicine (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Detergent Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)
PCT/US2006/039726 2005-10-25 2006-10-11 Methods for cleaning industrial equipment with pre-treatment Ceased WO2007050291A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP06825761.7A EP1948774B2 (en) 2005-10-25 2006-10-11 Methods for cleaning industrial equipment with pre-treatment
PL06825761T PL1948774T5 (pl) 2005-10-25 2006-10-11 Sposoby mycia urządzeń przemysłowych z obróbką wstępną
NZ565897A NZ565897A (en) 2005-10-25 2006-10-11 Methods for cleaning industrial equipment using a CIP process utilising a pre-treatment with peroxycarboxylic acids
CA2619007A CA2619007C (en) 2005-10-25 2006-10-11 Methods for cleaning industrial equipment with pre-treatment
AU2006306652A AU2006306652B2 (en) 2005-10-25 2006-10-11 Methods for cleaning industrial equipment with pre-treatment
BRPI0615774A BRPI0615774B1 (pt) 2005-10-25 2006-10-11 método para limpar sujeira de equipamentos industriais empregando um processo de cip
DK06825761.7T DK1948774T4 (en) 2005-10-25 2006-10-11 PROCEDURES FOR CLEANING INDUSTRIAL EQUIPMENT WITH PRE-TREATMENT
JP2008537741A JP4927858B2 (ja) 2005-10-25 2006-10-11 前処理による産業装置の洗浄方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/257,874 US8114222B2 (en) 2004-08-27 2005-10-25 Method for cleaning industrial equipment with pre-treatment
US11/257,874 2005-10-25

Publications (1)

Publication Number Publication Date
WO2007050291A1 true WO2007050291A1 (en) 2007-05-03

Family

ID=37607199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/039726 Ceased WO2007050291A1 (en) 2005-10-25 2006-10-11 Methods for cleaning industrial equipment with pre-treatment

Country Status (11)

Country Link
US (4) US8114222B2 (https=)
EP (1) EP1948774B2 (https=)
JP (1) JP4927858B2 (https=)
CN (2) CN102794278B (https=)
AU (1) AU2006306652B2 (https=)
BR (1) BRPI0615774B1 (https=)
CA (1) CA2619007C (https=)
DK (1) DK1948774T4 (https=)
NZ (1) NZ565897A (https=)
PL (1) PL1948774T5 (https=)
WO (1) WO2007050291A1 (https=)

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CN101555441B (zh) * 2008-04-09 2012-03-21 中国神华能源股份有限公司 清洗剂和ggh换热组件的清洗工艺
US8618037B2 (en) 2011-01-05 2013-12-31 Ecolab Usa Inc. Aqueous acid cleaning, corrosion and stain inhibiting compositions in the vapor phase comprising a blend of nitric and sulfuric acid
US8623805B2 (en) 2011-01-05 2014-01-07 Ecolab Usa Inc. Acid cleaning and corrosion inhibiting compositions comprising a blend of nitric and sulfuric acid
EP1948774B1 (en) 2005-10-25 2015-09-02 Ecolab Inc. Methods for cleaning industrial equipment with pre-treatment
EP3589778A4 (en) * 2017-02-28 2020-12-09 Ecolab USA Inc. ALKALINE CLEANING COMPOSITION CONSISTING OF HYDROXYPHOSPHONO-CARBOXYLIC ACID AND METAL CORROSION REDUCTION METHODS
US12384986B2 (en) 2018-11-22 2025-08-12 Ecolab Usa Inc. Acidic cleaning compositions for enhanced soil removal

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US9597679B2 (en) 2011-12-13 2017-03-21 Ecolab Usa Inc. Integrated acid regeneration of ion exchange resins for industrial applications
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US9752105B2 (en) 2012-09-13 2017-09-05 Ecolab Usa Inc. Two step method of cleaning, sanitizing, and rinsing a surface
US20140308162A1 (en) 2013-04-15 2014-10-16 Ecolab Usa Inc. Peroxycarboxylic acid based sanitizing rinse additives for use in ware washing
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