Process for controlling pitch deposits in the pulp and papermaki

Details Process for controlling pitch deposits in the pulp and papermaki Process for controlling pitch deposits in the pulp and papermaki

1988-09-15

1990-08-21

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

Conditioning, preparing or repairing of apparatus

162DIG4, 162 79, 1621812, 1621813, 1621815, D21C 908

Patent

active

049503618

ABSTRACT:
The deposition of pitch on the machinery used in the pulping and papermaking processes and in the final paper produced in the papermaking process is prevented by adding an effective amount of a water-soluble zirconium(IV) compound to the aqueous system of a pulping and/or papermaking process to prevent the deposition of pitch on the machinery and in the final paper. The addition of an effective amount of a water-soluble zirconium(IV) compound to the aqueous system of the pulping and papermaking process also removes pitch deposits from the machinery used in the pulping and papermaking processes.

REFERENCES:
patent: 4268351 (1981-05-01), Henbest et al.
patent: 4608123 (1986-08-01), Leahy
patent: 4647505 (1987-03-01), Blackie et al.
patent: 4756801 (1988-07-01), Jokinen et al.
Hassler, "Pitch Deposition in Papermaking & Function of Pitch Control Agents", Tappi Journal, pp. 195-201, Jun. 1988.
Magnesium Elektron Data Sheet 103A, "Zirconium Chemicals in the Paper Industry--An Introduction", (Mar. 1984)--4 pages.
McAlpine, Paper Technology and Industry, Jun./Jul. 1985, pp. 194-198.
Dickens, Tappi Journal, Dec. 1986, pp. 55-58.
Goldberg et al., Tappi Proceedings, 1987 Pulping Conference, pp. 585-596.
Rahman, Tappi Journal, Oct. 1987, pp. 105-112.
Carlisle Chemical Corp., "The Problem", 3 pages (undated).
Magnesium Elektron Data Sheet 500, "Zirconium Chemicals Product List", 6 pages (undated).

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