Secondary fiber cellulose product with reduced levels of polychl

Details Secondary fiber cellulose product with reduced levels of polychl Secondary fiber cellulose product with reduced levels of polychl

1991-02-28

1993-05-25

Hastings, Karen M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 63, 162100, D21C 502

Patent

active

052136604

ABSTRACT:
A process for removing PCDD's and PCDF's from cellulose-containing fibers such as waste paper is provided. The process comprises contacting the fibers with supercritical or near supercritical carbon dioxide for a period of time sufficient to extract a substantial portion of the PCDD's and PCDF's without substantially damaging the fibers. Extraction efficiencies of greater than 95% have been achieved with the technique.

REFERENCES:
patent: 3994770 (1976-11-01), Lausch
patent: 4048007 (1977-09-01), Valle Riestra
patent: 4061566 (1977-12-01), Modell
patent: 4113446 (1978-09-01), Modell et al.
patent: 4147624 (1979-04-01), Modell
patent: 4263253 (1981-04-01), Pilz et al.
patent: 4308200 (1981-12-01), Fremont
patent: 4338199 (1982-07-01), Modell
patent: 4466923 (1984-08-01), Friedrich
patent: 4472442 (1984-09-01), Katz
patent: 4493797 (1985-01-01), Avedesian
patent: 4495095 (1985-01-01), Lawson et al.
patent: 4543190 (1985-09-01), Modell
patent: 4550198 (1985-10-01), Myerson
patent: 4554170 (1985-11-01), Panzner et al.
patent: 4564458 (1986-01-01), Burleson
patent: 4594164 (1986-06-01), Titmas
patent: 4647466 (1987-03-01), Japikse et al.
patent: 4675198 (1987-06-01), Sevenants
patent: 4703060 (1987-10-01), Traitler et al.
patent: 4728525 (1988-03-01), Toro et al.
patent: 4767634 (1988-08-01), Kaleda et al.
patent: 4956048 (1990-09-01), Hise
Paper Technology "Swedes Investigate Dioxin" Dec./Jan. 1989 p. 36.
Botre et al., Environmental Science and Technol., vol. 12, No. 3, Mar. 1978, pp. 335-336.
Brady et al., "Supercritical Extraction of Toxic Organics from Soils", Ind. Eng. Chem. Res., 1987, vol. 26, pp. 261-268.
Crosby et al., Environmental Health Perspectives, Sep. 1973, pp. 259-266.
Crosby et al., Science, vol. 173, Aug. 20, 1971, pp. 173-174.
Dooley et al., EPA Report No. 600/9-87/018F, pp. 383-397.
Dulin et al., Environ. Sci. Technol., vol. 20, No. 1, 1986, pp. 72-77.
Eckert et al., Environ. Sci. Technol., 1986, vol. 20, pp. 319-325.
Groves et al., CRC Critical Reviews in Environmental Control, 1985, vol. 15, pp. 237-274.
Hatakeda et al., Nipon Kagaku Kaishi, 1987, No. 5, pp. 931-933.
Hawthorne et al., J. Chromatogr., 1987, vol. 403, pp. 63-76.
Hawthorne et al., Anal. Chem., 1987, vol. 59, pp. 1705-1708.
Li et al., Ind. Eng. Chem. Res., 1988, vol. 27, pp. 1301-1312.
Modell, M., Fundam. Thermochem. Biomass Convers., 1985, pp. 95-119.
Ottoboni, A., The Dose Makes the Poison, Vincente Books, Berkeley, Calif., 1984.
Pang et al., Ind. Eng. Chem. Process. Des. Dev., 1985, vol. 24, pp. 1027-1032.
Plimmer, J. R., Bull. Environm. Contam. Toxicol., vol. 20, 1978, pp. 87-92.
Podoll et al., Environ. Sci. Technol., vol. 20, No. 5 1986, pp. 490-492.
Rappe et al., Chlorinated Dioxins and Dibenzofurans in the Total Environment II, Keith et al. eds., Butterworth, 1985, pp. 125-126.
Ritter and Campbell, Biotechnology and Bioengineering Symp., 1986, No. 17, pp. 179-182.
Schneiderman et al., J. Chromatogr., 1987, vol. 409, pp. 343-353.
Shishikura et al., J. Jpn. Oil Chem. Soc., 1988, vol. 37, pp. 8-12.
Dioxins, NTIS Report No. PB82-136847, Industrial Environmental Research Laboratory, Cincinnati, Ohio, Nov., 1980, Section 6.
Suprex Publication No. TN-022, Suprex Corporation, Pittsburgh, Pa. 1989.
Srinivasan et al., Chlorinated Dioxins and Dibenzofurans in Perspective, Rappe et al. eds., Lewis Publishers, Inc., 1986, pp. 531-537.
West et al., Can. J. Chem. Eng., 1987, vol. 65, pp. 645-650.
Chemosphere--Chlorinated Dioxins and Related Compounds 1987, McNelis et al. eds., Pergamon Press, New York, vol. 18, Nos. 1-6, 1989, p. 50.

Affiliated with

Also associated with

Rating

Secondary fiber cellulose product with reduced levels of polychl does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Secondary fiber cellulose product with reduced levels of polychl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secondary fiber cellulose product with reduced levels of polychl will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-894922