Presentation on theme: "Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 1 Additives for Food Grade Lubricants PROTECTION Ciba Specialty Chemicals Pictures: HygieniCon."— Presentation transcript:
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 1 Additives for Food Grade Lubricants PROTECTION Ciba Specialty Chemicals Pictures: HygieniCon Dr. Tassilo Habereder; Eric Nehls
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 2 Content Food Grade Lubricants’ requirements Classification Critical Control Points Base fluids Additives with FDA-approval Applications and Formulation recommendations
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 3 Food grade lubricants Lubricants, which are needed by food, beverage and pharmaceutical producers have to meet special requirements: Technical requirements: national und international norms Specification from the end-user OEM specifications Hygienic requirements: lowest impact on living organisms no impact on taste or odor Legal requirements NSF positive list (former USDA) FDA approval (acc. to 21CFR 178.3570) ISO 21469: “Lubes with incidental product contact” Picture: www.kba-metronic.com
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 4 NSF = National Sanitation Foundation NSF 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 contact H2 Lubricants with no contact H3 Soluble oils HX-1 Additives for H1 lubricants HX-2 Additives for H2 lubricants HX-3 Additives for H3 lubricants Legal requirements Positive List for „Food Grade“ additives Link: http://www.nsf.org/usda/psnclistings.asp
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 5 Food grade lubricants H1 - lubricants Food 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 - lubricants Food 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 In the food producing industry generally 2 types of lubricants are used (as classified by National Sanitation Foundation (NSF)
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 6 NSF Positive List for HX-1 Additives Suitable additives can be selected. New or modified formulations have to be registered Registration 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.
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 7 HACCP – Hazard analysis of critical control points 1. Does the process step include a hazard? 2. Does a control measurement exist? No No CCP Yes No Modification of the process or product required Yes Is a safety control necessary? Yes 3. Is a control necessary to avoid any hazard for the end user No No CCP Yes CCP
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 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 required For critical processes, usage of H-1 lubricants is mandatory For non-critical processes, usage of H-2 lubricants is possible It has to be ensured that for critical processes a mix-up of H1 and H2 fluids is impossible
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 9 White oil Toxicity is still not fully evaluated Different crude oil qualities can cause a different additive response No multi grade performance Weak low temperature performance Only available in viscosity grades ISO VG 15 und ISO VG 68 cheap Good additive solubility Base Fluids for food grade lubricants Polyalphaolefins Defined starting material (Decen) Well defined molecules Good performance High viscosity index Good low and high temperature Performance Available in different viscosity grades Expensive base fluid An increasing number of Esters und Polyglycols are FDA approved. It is expected to see a trend towards these base fluids in future.
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 10 Available FDA-approved additives Examples for FDA-approved additivesmaximum allowed treat rate Antioxidants Liquid alkylated di-phenylamine (aminic antioxidant)0.5 % Various high molecular weight phenolic antioxidants0.5 % each High mol. weight phenolic antioxidant with thioether group0.5 % Liquid di-alpha-tocopherol (Vitamine E)no limit (GRAS cleared) Blends of phenolic and aminic antioxidants0.5 – 0.7 % Corrosion inhibitors/Metal Deactivators Liquid Imidazoline Derivative0.5 % Liquid N-oleyl sarcosine0.5 % Di-Sodium Sebacate (for greases)2.0 % Liquid tolutriazole derivative0.1 % Extreme Pressure / Antiwear Additives Liquid Amine phoshate0.5 % Various Triphenyl Phophorothionates0.5 % each Liquid Di-N-Octyl Phophite0.5 %
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 11 Applications Depending on the application and the specifications different fluids and formulations are necessary Hydraulic oils Gear oils Chain oils Compressor oils Oils for vacuum pumps Heat transfer fluids Greases Further differentiation possible via Kosher-grade Halal-grade …
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 12 General formulation strategies Selection of a suitable base fluid Think about mixtures such as PAO and Esters in order to benefit from the various advantages PAO and white oils can have limited additive solubility Carefully check the additive solubility in the selected base fluid The maximum treat rate of an additive is limited by the FDA approval sometimes additives with a similar profiles have to be used to achieve the performance while staying within the allowed limits Additives can have synergistic and antagonistic effects. Typically corrosion inhibitors and anti-wear additives have to be balanced. The formulation has to be checked carefully The final formulation has to be tested (lab scale and ideally in the field).
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 13 Starting formulation for greases: Note: Amine Phosphates can react with soap thickener influencing the rheology. This has to be carefully checked. Additivetypetreat rate Alkylated DPAAO0.50 Phenolic AO with ThioetherAO0.400.20 Phenolic AOAO0.400.20 Tolutriazole derivativeMD0.10 Amine PhosphateAW0.20 Liquid TPPTAW 0.50 Solid TPPTAW0.50 N-Oleyl SarcosineCI0.500.20 Imidazoline DerivativeCI0.500.20 Thickener SystemThickener2-20% Esterbase fluidbalance PAO or white oilbase fluid balance
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 14 Starting formulation for low temp. applications Such a formulation would be suitable for circulating oils, providing a good metal protection and a good anti-wear performance The 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 Additivetypetreat rate Blend of ADPA and phenolic AO’sAO0.3-0.5 Tolutriazole DerivativeMD0.050 Amine PhosphateAW0.100 N-Oleyl SarcosineCI0.050 PAO or white oilbase fluidbalance
Additives for Food grade Lubricants, Ciba SC, Nov. 2007, page: 15 PROTECTION Ciba Specialty Chemicals Ciba’ s food approved additives take care about your lubricant Picture: www.alf-mb.bayern.de )