Starch Xanthate Research Articles

Effect of Reaction Variables on Distribution of Xanthate Groups in Starch Xanthate

Effect of Reaction Variables on Distribution of Xanthate Groups in Starch Xanthate

Location of Xanthate Groups in Starch Xanthate

Location of Xanthate Groups in Starch Xanthate

Uniformity of Starch Xanthates Prepared by a Rapid, Continuous Process

Starch - StärkeVolume 17, Issue 3 p. 77-81 Article Uniformity of Starch Xanthates Prepared by a Rapid, Continuous Process† W. M. Doane Ph. D., W. M. Doane Ph. D. Cereal Products Laboratory, Northern Regional Research Laboratory, Peoria, Illinois (USA). Search for more papers by this authorC. R. Russell Ph. D., C. R. Russell Ph. D. Cereal Products Laboratory, Northern Regional Research Laboratory, Peoria, Illinois (USA). Search for more papers by this authorC. E. Rist, C. E. Rist Cereal Products Laboratory, Northern Regional Research Laboratory, Peoria, Illinois (USA). Search for more papers by this author W. M. Doane Ph. D., W. M. Doane Ph. D. Cereal Products Laboratory, Northern Regional Research Laboratory, Peoria, Illinois (USA). Search for more papers by this authorC. R. Russell Ph. D., C. R. Russell Ph. D. Cereal Products Laboratory, Northern Regional Research Laboratory, Peoria, Illinois (USA). Search for more papers by this authorC. E. Rist, C. E. Rist Cereal Products Laboratory, Northern Regional Research Laboratory, Peoria, Illinois (USA). Search for more papers by this author First published: 1965 https://doi.org/10.1002/star.19650170304Citations: 16 † Presented before Cellulose, Wood, and Fiber Chemistry Division, 145th national meeting, American Chemical Society, New York, N. Y., September 8–13, 1963 ‡ This is a laboratory of the Northern Utilization Research and Development Division, Agricultural Research Service, U. S. Department of Agriculture. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume17, Issue31965Pages 77-81 RelatedInformation

THE DIVERGENT BEHAVIOR OF THE HYDROXIDES OF LITHIUM, SODIUM, AND OF POTASSIUM, RUBIDIUM, AND CESIUM IN THE XANTHATION OF CELLULOSE AND STARCH

When a suspension of cellulose, or a solution of starch, in 17.8% aqueous sodium hydroxide was shaken with a large excess of carbon disulphide, a sodium xanthate of degree of substitution (D.S.) about 0.4 was obtained. The replacement of the sodium hydroxide by 17.8% potassium hydroxide resulted in a product of D.S. about 1.3. Plots were made of the D.S. of cellulose xanthate resulting from the use of various concentrations of the hydroxides of lithium, sodium, potassium, rubidium, and cesium; the plots for the last three hydroxides were similar, and differed sharply in form from those of the first two.Potassium cellulose or starch xanthate of D.S. about unity was freely soluble in water as well as in aqueous alkalies and the solutions "ripened". When immersed in methyl iodide, the dry salts yielded the corresponding S-methyl xanthates without change in the D.S. These S-methyl xanthates were white substances insoluble in water but dissolved or dispersed by carbon disulphide. They could be acetylated with sulphuric acid as catalyst and without change in the S-methyl xanthate D.S. The acetylated cellulose derivative was freely dispersed by chloroform or trichloroethylene.