Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Patent
1987-03-24
1987-12-29
Chin, Peter
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
D21F 132
Patent
active
047159316
ABSTRACT:
This invention relates to process for inhibiting deposition of aluminum hydroxide in felts of a papermaking system which comprises adding to the felts an effective inhibiting amount of a hydroxylated carboxylic acid having at least 1 hydroxyl group and at least 2 carboxyl groups. The molecular weight of the carboxylic acid is from about 100 to about 200 and, preferably, the carboxylic acid is selected from the group consisting of tartaric acid, malic acid, citric acid, mesoxalic acid, tartronic acid and tetrahydroxy succinic acid. The use of these carboxylic acids in combination with surfactants provides an especially effective aluminum hydroxide inhibiting and total felt conditioning process when both components are applied to the felt.
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"Cleaning and Conditioning of Papermakers Felts", Shannon V. West, Southern Pulp and Paper Manufacturer, Sep. 10, 1968, pp. 60, 62.
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Barnett Daniel J.
Khan Abdul Q.
Schellhamer Alan J.
Betz Laboratories Inc.
Chin Peter
Dang Thi
Dee James D.
Peacock Bruce E.
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