Semi-Continuous Manufacturing of Personal Care Liquids

Transcription

1 Semi-Continuous Manufacturing of Personal Care Liquids Prepared for the Integrated Continuous Biomanufacturing Conference October 20-24, 2013 Castelidefeis, Spain Peter Divone Sr., P.E. Director, Process Development Global Skin Category R&D

2 SEMI-CONTINUOUS MANUFACTURING OF PERSONAL CARE LIQUIDS ABSTRACT In many personal care product liquids applications, batch manufacturing has been replaced by continuous or semi-continuous processes. When moving from batch to continuous processing, coordination between formulation development, process development, supply chain and manufacturing quality control is mandatory. R&D commitment to support the semi-continuous platform is a prerequisite for wide spread adoption and long term progression. Unilever has adopted and adapted semi-continuous processing for its personal care liquids manufacturing. With multi channel systems from 4 liters/minute to 400 liters/ min., we have installed, commissioned and validated units in 10 countries. A review of scale-up practices, machine design (including hygienic considerations) and practical considerations are outlined in the presentation. ABOUT THE AUTHOR Peter A. Divone, Sr., P.E., is Unilever s Global Skin Care and Cleansing Process Development Director. With over 30 years of experience across several consumer goods companies, Peter has worked in R&D Process Development for most of his career. Peter has pioneered Unilever s semi-continuous manufacturing platform for skin care and cleansing liquids (creams, lotions and personal wash liquids). The technology has been globally transferred at the pilot and plant levels. Peter is based in Unilever s R&D center in Trumbull, Connecticut, USA. 2

3 Agenda Introduction : Overview of Technology Batch vs. Continuous : Benefits R&D Integration &Scale-up Plant Design Summary 3

4 Introduction: Overview of Technology Flow Diagram Details of in-line mixer 4

5 Introduction: Overview of Technology Water Premix Oil Premix Minors Neat Water Rework tank To Storage Tank In-line Mixer Phases flow Finished product flow Semi-Continuous Processing of Personal Care Liquids Typical 3 stream Skin Lotion schematic 5

6 Details of In-line Mixer High Pressure Cavitation Mixer Principle of Operation: Provides Instantaneous Emulisification Water Ingredient Premix Orifice Pressure bars Oil Ingredients Premix Minor Premix PRODUCTION 180 to 270 kg/min 6

7 Benefits : Semi- Continuous vs. Batch Mixing Cycle Time Comparison Cost Comparison Experience to Date 7

8 Benefits : Semi-Continuous vs Batch Cycle Time Comparison Phase preparation 35 to 50 minutes Emulsification 0 (Instant) Cooling 0 Final mix 0 Discharge 30 to 40 minutes Total cycle time 65 to 90 minutes (within 1.5 hours) Phase preparation 35 to 50 minutes Emulsification 30 to 60 minutes Cooling 60 to 120 minutes Final mix 15 to minutes Discharge 30 to 40 minutes Total cycle time to 290 minutes (3 to 5 hours) Typical HBL semi-continuous vs and batch process (based on 6.5 ton run) 8

9 Benefits : Semi-Continuous vs Batch Cost Comparison BATCH Process - Capacity 45 kgs/min - Capital - $1.2M (0.8M EU) SEMI-CONTINUOUS Process - Capacity - (270 kgs/min) - Capital - $1.9M (1.3M EU) BATCH REQUIRES ~ 4X THE INVESTMENT TO DELIVER THE SAME CAPACITY AS SEMI-CONTINUOUS MIXING 9

10 Benefits : Semi-Continuous vs Batch Experience to date: 70% Capacity increase Allows the use of concentrated premixes for further capacity increase ( 3X for HBLs and up to 10X for shampoos) Less energy / Kg consumption Reduced waste - both effluent and product Quality control Tighter droplet size distribution Better run to run consistency Innovation enabler tailored product characteristics Controlled droplet size distribution Smaller Footprint Easier to Clean and Changeover 10

11 R&D Integration and Scale-Up Formulation Breakdown Pilot Plant Data Acquisition and Measurement Tools Understanding Hydrodynamic Cavitation Pilot Plant Models 11

12 R&D Integration Scale-Up Formula Development: O/W Skin Cream Emulsion WATER PHASE 32 C Oil Phase 4000 kgs CODE Material % Kgs Temperature Pristerene Bomb No Cerasynt IP % Monoestearato de Glicerilo Alcohol Cetílico Petrolato Myrj Neobee M Silicon 50 cts Metilparaben Propilparaben Acetato de Vitamina E Silicon Water Phase 4000 kgs CODE Material % Kgs Temperature Agua Desmineralizada Bomb No Glicerina USP % Sequestrene NA Trietanolamina C Dioxido de titanio Fragancia Horizontal DB Color STD Dove Masterblend Odor STD Phenoxyethanol Appearance STD Emersol ph Visc. Initial. 34 C Agua Desmineralizada Overnight 25 C Synthalen M Espec. Grav Pemulen TR Brookefield RVT, S#6 a 20 rpm, 1min Premix before addition to Water Phase In-Line Mixer SONOLATOR ORIFICE SCALE UP CONDITIONS DOVE LOTIONS OIL PHASE 73 C PRESSURE FLOW RATE 180 PSI / 12 BAR 140 KG/MIN ORIFICE IN 2 10 Volume (%) Particle Diameter (µm.) Particle Size Distribution average 15.38um

13 R&D Integration Scale-Up Pilot Plant DAQ & Measurement Tools Stress (Pa) Dove Nourishing pilot trials WP Temp = 105F, P= 250 psi orifice = in2 orifice = in Shear Rate (1/s) 13

14 R&D Integration Scale-Up Understanding Hydrodynamic Cavitation Hydrodynamic flow equation: Q=kA(P)^0.5 SI Units US Units Q=Throughput water like fluid (L/min) Q=Throughput water like fluid (gal/min) k= SI Orifice Coeffecient (67) k= US Orifice Coeffecient (30) A= orifice area (cm^2) A= orifice area (in^2) P= Pump-to-orifice Pressure (bar) P= Pump-to-orifice Pressure (PSI) Q*= Throughput water like fluid SG=1 (kgs/min) Q*= Throughput water like fluid SG=1 (lbs/min) SI Units US Units 1in= 2.54 cm k 67 SI Coefficient 30 US Coefficient 1bar= 14.5 psi A cm^ in^2 1gal= L P bar PSI 1gal= lbs (SG=1) Q L/min 2.99 gal/min 1kg= kgs (SG=1) Q* kgs/min lbs/min 1kg= lbs 14

15 Pilot Plant Models 15

16 Plant Design Controls & Software Layout Considerations Maintenance and Repair Hygienic Valves and CIP 16

17 Plant Design : Controls and Software 17

18 Plant Design: Layout Considerations Semi-Continuous kit location locate pumps within close proximity to pre-mix tanks minimize length of oil line (Lotion/Cream) Mixer 18

19 Plant Design: Layout Considerations Location with Adequate Space adequate room to work on wet end of pumps Pumps 19

20 Plant Design: Maintenance & Repair Progressive Cavity Metering pumps replacement parts include rotors, stators, seals, boots stators represent largest expense stators made from Viton have provided best performance average annual cost(3 pumps) = $9,000 USD (add initial cost per pump) 20

21 Plant Design: Valves & CIP Check-valves on all streams leading into mixing chamber CIP around in-line mixer Pressure relief valves (Bardiani or Tuchenhagen Q) or rupture discs 21

22 Summary 14 SEMI-CONTINUOUS SYSTEMS GENERATE 30% OF ALL THE PCL TONNAGE PRODUCED BY UNILEVER, OVER 200 BATCH PLATFORMS PRODUCE THE REST OF THE VOLUME By 2016, we expect to move this to 75% of all Personal Care Liquids Production. Semi-continuous systems are now used to make almost all PCL products including Hand & Body Lotions, Face Creams, Shampoos, Conditioners, Personal Wash Liquids Semi-continuous systems are now located in 10 R&D pilot plants around the world. 22

23 It takes Dedicated Teamwork and Focus to move from batch to continuous processing! Thank you 23