Presentation on theme: "Dr. Tassilo Habereder; Eric Nehls"— Presentation transcript:
1 Dr. Tassilo Habereder; Eric Nehls PROTECTIONCiba Specialty ChemicalsAdditives forFood Grade LubricantsDr. Tassilo Habereder; Eric NehlsPictures: HygieniCon
2 Content Food Grade Lubricants’ requirements Base fluids ClassificationCritical Control PointsBase fluidsAdditives with FDA-approvalApplications and Formulation recommendations
3 Picture: www.kba-metronic.com Food grade lubricantsLubricants, which are needed by food, beverage and pharmaceutical producers have to meet special requirements:Technical requirements:national und international normsSpecification from the end-userOEM specificationsHygienic requirements:lowest impact on living organismsno impact on taste or odorLegal requirementsNSF positive list (former USDA)FDA approval (acc. to 21CFR )ISO 21469: “Lubes with incidental product contact”Picture:
4 Positive List for „Food Grade“ additives Legal requirementsNSF = National Sanitation FoundationNSF started 1999 with the listing and registration for “Nonfood Compounds”.Providing a product approval process (Up-to-date, web-based listing)Classification for Lubricants and additives:H1 Lubricants with incidental contactH2 Lubricants with no contactH3 Soluble oilsHX-1 Additives for H1 lubricantsHX-2 Additives for H2 lubricantsHX-3 Additives for H3 lubricants Positive List for „Food Grade“ additivesLink:
5 Food grade lubricantsIn the food producing industry generally 2 types of lubricants are used (as classified by National Sanitation Foundation (NSF)H1 - lubricantsFood grade lubricant, containing only ingredients which are mentioned on an list of allowed substances issued by the Food and Drug Administration (FDA).The lubricant is suitable for an incidental, technically unavoidable contact with the food product.H2 - lubricantsFood grade lubricant, which does not contain ingredients mentioned on a negative list issued from the USDA. Suitable for use in food an pharmaceutical industries provided that a contact with the food product is absolutely impossible
6 NSF Positive List for HX-1 Additives Suitable additives can be selected. New or modified formulations have to be registeredRegistration of lubricant is simplified when only using NSF-listed additives.The maximum treat rate is noted.The trade name of the additives are noted.No technical guidance is given.
7 HACCP – Hazard analysis of critical control points 1. Does the process step include a hazard?YesNoNo CCP2. Does a control measurement exist?YesNoModification of the process or product requiredIs a safety control necessary?Yes3. Is a control necessary to avoid any hazard for the end userYesCCPNoNo CCP
8 HACCP – Hazard Analysis of Critical Control Points Typically the result of a HACCP is that a production site has critical control points and points where no further action would be requiredFor critical processes, usage of H-1 lubricants is mandatoryFor non-critical processes, usage of H-2 lubricants is possibleIt has to be ensured that for critical processes a mix-up of H1 and H2 fluids is impossible
9 Base Fluids for food grade lubricants White oilToxicity is still not fully evaluatedDifferent crude oil qualities can cause a different additive responseNo multi grade performanceWeak low temperature performanceOnly available in viscosity grades ISO VG 15 und ISO VG 68cheapGood additive solubilityPolyalphaolefinsDefined starting material (Decen)Well defined moleculesGood performanceHigh viscosity indexGood low and high temperature PerformanceAvailable in different viscosity gradesExpensive base fluidAn increasing number of Esters und Polyglycols are FDA approved. It is expected to see a trend towards these base fluids in future.
10 Available FDA-approved additives Examples for FDA-approved additivesmaximum allowed treat rateAntioxidantsLiquid alkylated di-phenylamine (aminic antioxidant)0.5 %Various high molecular weight phenolic antioxidants0.5 % eachHigh mol. weight phenolic antioxidant with thioether groupLiquid di-alpha-tocopherol (Vitamine E)no limit (GRAS cleared)Blends of phenolic and aminic antioxidants0.5 – 0.7 %Corrosion inhibitors/Metal DeactivatorsLiquid Imidazoline DerivativeLiquid N-oleyl sarcosineDi-Sodium Sebacate (for greases)2.0 %Liquid tolutriazole derivative0.1 %Extreme Pressure / Antiwear AdditivesLiquid Amine phoshateVarious Triphenyl PhophorothionatesLiquid Di-N-Octyl PhophiteEPA=environmental protection agencyFDA=food and drug administrationUSDA=US depart. Of agricultureCDC=center for disease control and preventionPAHO=Pan American Health OrganizationWHO= World Health Organization
11 ApplicationsDepending on the application and the specifications different fluids and formulations are necessaryHydraulic oilsGear oilsChain oilsCompressor oilsOils for vacuum pumpsHeat transfer fluidsGreasesFurther differentiation possible viaKosher-gradeHalal-grade…
12 General formulation strategies Selection of a suitable base fluidThink about mixtures such as PAO and Esters in order to benefit from the various advantagesPAO and white oils can have limited additive solubilityCarefully check the additive solubility in the selected base fluidThe maximum treat rate of an additive is limited by the FDA approvalsometimes additives with a similar profiles have to be used to achieve the performance while staying within the allowed limitsAdditives can have synergistic and antagonistic effects.Typically corrosion inhibitors and anti-wear additives have to be balanced.The formulation has to be checked carefullyThe final formulation has to be tested (lab scale and ideally in the field).
13 Starting formulation for greases: Additivetypetreat rateAlkylated DPAAO0.50Phenolic AO with Thioether0.400.20Phenolic AOTolutriazole derivativeMD0.10Amine PhosphateAWLiquid TPPTSolid TPPTN-Oleyl SarcosineCIImidazoline DerivativeThickener SystemThickener2-20%Esterbase fluidbalancePAO or white oilNote: Amine Phosphates can react with soap thickener influencing the rheology. This has to be carefully checked.
14 Starting formulation for low temp. applications Additivetypetreat rateBlend of ADPA and phenolic AO’sAOTolutriazole DerivativeMD0.050Amine PhosphateAW0.100N-Oleyl SarcosineCIPAO or white oilbase fluidbalanceSuch a formulation would be suitable for circulating oils, providing a good metal protection and a good anti-wear performanceThe low treat rate of antioxidants and typically the use of a white oil as a base fluid would limit the use for high temperature applications
15 Ciba’ s food approved additives take care about your lubricant PROTECTIONCiba Specialty ChemicalsCiba’ s food approved additivestake care about your lubricantPicture: )