Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1988-04-12
1990-03-06
Manahoran, Virginia
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
162 82, D21C 320
Patent
active
049063316
ABSTRACT:
The present invention is directed to the use of certain ethoxylated compounds to increase the yield of chemical pulping processes, the compound have the following structures: ##STR1## These ethoxylated compounds have molecular weights of from about 500 to about 30,000 the (CH.sub.2 CH.sub.2 O) comprising from about 20 to 80 percent of the compound; and a, b, and c are each at least 1. The compounds are surface active agents which are added to the cooking liquor. The wood chips are cooked from about one-half and ten hours at a temperature of from about 200 and 500 degrees Fahrenhelt in a liquor including sodium hydroxide, sodium sulfide, and the surface active agent. The wood plug would have a reject level of at least 5% when the chips are cooked in the absence of the surface active agent. The process provides a simultaneous reduction in the level of rejects and an increased yield of pulp.
REFERENCES:
patent: 2716058 (1955-08-01), Rapson et al.
patent: 2999045 (1961-09-01), Mitchell et al.
patent: 3909345 (1975-09-01), Parker et al.
patent: 4426254 (1984-01-01), Wood et al.
Chem. Abstract; Rutkowski; Inv. on the Role of Surface Active Agents on the Processes of Wood Pulping, vol. 66, 1967, p. 9.
Chem. Abstract; Shpenzu et al.; Wood Pulp Production; vol. 98, 1983, p. 96.
Chem. Abst.; Kovalena et al.; Composition of Desensitizing Paper Pulp; vol. 102, 1985, p. 104.
Chem. Abst.; Streylyugina; Effect of Surfactants on the Dispersibility of Cold--Refined Kraft paper; vol. 91, 1979, p. 83.
Wenzyl, D. V. H., Fatty Acid Dimethylamide Formulations as Production Additives in the Pulp Industry; May 5, 1975.
Campos et al.; Kraft Pulping is Improved by Utilizing Dimethylamides of Long Chain Fatty Acids; Oct. 1973.
James P. Casey; Pulp and Paper Chemistry and Chemical Technology; 3rd ed., vol. 1, pp. 385, 390, 398, 404-406 & 412, (1980).
Chemical Abstract 104:151142q, "Pulping with an Amphoteric Surfactant Additive", (1986), vol. 104, p. 120.
Chemical Abstract 102:205630b, "Methods for control of pitch troubles in sulfate pulp mills", (1985), vol. 102, p. 90.
Chemical Abstract 101:173305k, "Reducing resing and fat content in kraft pulp", (1984), vol. 101, p. 112.
Chemical Abstract 100:141044n, "Bleaching of pulp using alkaline solutions . . . ", (1984), vol. 100, pp. 100-101.
Chemical Abstract 96:183008h, "Chlorination of pine kraft pulp . . . ", (1981).
K. E. Lowe et al., Paper Trade Journal, Sep. 29, 1969, pp. 40-42.
Chemical Abstract 91:22669f, "Colloidal--Chemical Properties . . . ", (1979), p. 113.
Chemical Abstract 89:148366q, "Production of Highly--Refined Pulp . . . ", (1978), vol. 89, p. 82.
Chemical Abstract 88:52195u, "Methods for the treatment of cord . . . ", (1978), vol. 88, pp. 75-76.
Chemical Abstract 87:25028z, "Effect of surfactant additives . . . ", (1977), vol. 87, p. 95.
Chemical Abstract 86:157305b, "Effect of surface--active agents . . . ", (1977), vol. 86, p. 100.
Chemical Abstract 82:60225e, "Application of unsaturated fatty acid . . . ", (1973).
Chemical Abstract 73:67828b, "Influence of surface--active agents . . . ", (1970).
Chemical Abstract 94:17330w, "Effect of surfactants on the surface . . . ", (1981), vol. 94, p. 89.
Chemical Abstract 82:158027s, "Adsorption of some surfactants by . . . ", (1975).
Chemical Abstract 93:27998p, "Addition of surfactants during hot . . . ", (1980), vol. 93, p. 88.
Chemical Abstract 92:95832j, "Effect of surfactants on the surface . . . ", (1980), vol. 92, p. 84.
Chemical Abstract 170394q, "Sorption of ionic surfactants by kraft . . . ", vol. 90, p. 104, (1979).
Chemical Abstract 90:1023364n, "Study of the effect of surfactants on some . . . ", (1979), vol. 90.
Chemical Abstract 90:40427j, "Study of the sorption--description of . . . ", (1979), vol. 90.
G. Bone Undergraduate Thesis Miami University (Ohio), May, 1977, pp. 1-40.
H. F. J. Wenzl, The Chemical Technology of Wood, Academic Press, New York, 1970, pp. 528-531, 652.
Encyclopedia of Chemical Technology, vol. 19, (John Wiley NY 1982), 379-391, 394-408, 417-419.
Encyclopedia of Polymer Science & Technology, vol. 15, pp. 32-34.
Blackstone Michael M.
Chen Cheng-I
Woodward Thomas W.
Betz PaperChem Inc.
Manahoran Virginia
Ricci Alexander D.
Sluzas Alex R.
LandOfFree
Method of enhancing the cooking of wood chips for pulp productio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of enhancing the cooking of wood chips for pulp productio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of enhancing the cooking of wood chips for pulp productio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-45536