• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 87
  • 36
  • 22
  • 12
  • 12
  • 12
  • 12
  • 12
  • 12
  • 3
  • 2
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 165
  • 165
  • 57
  • 45
  • 41
  • 38
  • 34
  • 34
  • 34
  • 29
  • 29
  • 29
  • 25
  • 25
  • 25
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

A study of the effects of chlorination and caustic extraction on the carbohydrate fraction of and aspen neutral sulfite semichemical pulp

Boehm, Richard Harry, January 1955 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1955. / Includes bibliographical references (p. 87-88).
62

The sulphite pulping of Douglas fir

Brookbank, Earl Bruce, January 1938 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1938. / Includes bibliographical references (leaf 94).
63

Alkaline degradation of methyl [beta]-D-glucopyranoside and methyl 2-O-methyl-[beta]-D-glucopyranoside

Nault, James J., January 1979 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1979. / Includes bibliographical references (leaves 81-82).
64

The effect of the neutral sulfite semichemical cook on the hemicelluloses of aspenwood

Lea, David Chester, January 1953 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1953. / Bibliography: leaves 67-69.
65

Color removal from softwood, kraft, caustic extract effluent by polyamines

Kisla, T. C. January 1976 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1976. / Bibliography: leaves 93-95.
66

A study of the kinetics of delignification during the early stage of alkaline sulfite anthraquinone pulping

Biasca, Karyn L. January 1989 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1989. / Bibliography: leaves 87-89.
67

A study of the initial phase of the aqueous chlorination of kraft pulp meals

Russell, Norman A., January 1966 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1966. / Bibliography: leaves 82-84.
68

The possible correlation between hemicelluloses and the physical properties of bleached kraft pulps

Ratliff, Francis T. January 1948 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1948. / Bibliography: leaves 78-80.
69

A study of the order and nature of the aspenwood hemicellulose removed during a neutral sulfite semichemical cook

Quick, Robert Harold, January 1955 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1955. / Bibliography: leaves 83-85.
70

The role of surfactants in kraft pulping of different wood species /

Chen, Dezhi, 1982- January 2007 (has links)
A unique penetration instrument has been developed to evaluate the role of surfactants in kraft pulping process. This instrument can screen surfactants which can improve the wood impregnation more effectively and much faster than pilot-plant experiment. The role of surfactants in wood penetration has been explored. Surfactants can improve wood impregnation by dispersing the extractives in the wood structure and optimizing the interfacial properties between wood surface and kraft liquor. The addition of two blends of anionic and nonionic surfactants into kraft pulping process results in a significant reduction of the screen rejects and an increase of screened yield at the same delignification rate. / Six wood species were tested in this study including both non-resinous and resinous wood species. Both sapwood and heartwood of these species were tested. Surfactants were found to have no improvement on sapwood, but a significant improvement on heartwood. The critical micelle concentrations (CMC) of surfactants in kraft liquor were determined. The best dosages of surfactants based on CMC were also determined in this study.

Page generated in 0.0658 seconds