Processes and compositions for cleaning mixing devices to improve polymer production

Processes and compositions for cleaning mixing devices are disclosed that improve the production and quality of thermoplastic polymer resins subsequently produced in the mixing device, while reducing the time needed for cleaning and/or change over. A cleaning mixture comprising polymeric resin pelle...

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Bibliographic Details
Main Authors GALLUCCI ROBERT RUSSELL, EHRENSBECK FRANKLIN
Format Patent
LanguageEnglish
Published 24.05.2016
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES
CANDLES
CHEMISTRY
CLEANING
CLEANING IN GENERAL
DETERGENT COMPOSITIONS
DETERGENTS
FATTY ACIDS THEREFROM
METALLURGY
PERFORMING OPERATIONS
PREVENTION OF FOULING IN GENERAL
RECOVERY OF GLYCEROL
RESIN SOAPS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
SOAP OR SOAP-MAKING
TRANSPORTING
USE OF SINGLE SUBSTANCES AS DETERGENTS
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Summary:Processes and compositions for cleaning mixing devices are disclosed that improve the production and quality of thermoplastic polymer resins subsequently produced in the mixing device, while reducing the time needed for cleaning and/or change over. A cleaning mixture comprising polymeric resin pellets having a Rockwell R hardness of 85 to 140 externally coated with an aqueous solution containing sulfonate salts, alkyl aryl sulfonate salts, alkyl sulfate salts, C6 to C36 carboxylic acid salts, or mixtures thereof, is used to purge the mixing device. The surfactant salt is present in the aqueous solution at 0.2 to 30 wt % of the solution, the aqueous solution having a pH of 6.0 to 9.0.
Bibliography:Application Number: US201313774524