Method for controlling sulphite pulping and hydrolytic processes

Details Method for controlling sulphite pulping and hydrolytic processes Method for controlling sulphite pulping and hydrolytic processes

1987-09-01

1989-06-27

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

162 61, 162 83, D21C 304, D21C 306, D21C 712

Patent

active

048426890

ABSTRACT:
A method of controlling sulphite pulping or hydrolytic processes by means of a rapid furfural analyzer. Furfural and 5-hydroxymethylfurfural are separated from the other UV-absorbing compounds of a process liquor sample. The concentration measurements are carried out by menas of an UV-method. The obtained measuring results are utilized for on-line controlling of the process in question.

REFERENCES:
patent: 4086129 (1978-04-01), Conca et al.
patent: 4540468 (1985-09-01), Genco et al.
Haglund et al., "Spectrophotometric Determination of the Dissolution of Lignin During Sulphite Cooking"; TAPPI, May 1964, vol. 47, No. 5, pp. 286-291.
Felicetta et al., "Spent Sulphite Liquor VII," TAPPI, vol. 42, No. 6, Jun. 1959.

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