Process for inhibiting aluminum hydroxide deposition in papermaking felts
US4715931A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1987 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Mar 24, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.