EMULSIFIED LIPOPHILIC PAPER SIZING

    公开(公告)号:CA1069410A

    公开(公告)日:1980-01-08

    申请号:CA236531

    申请日:1975-09-26

    Abstract: Aqueous emulsions containing lipophilic sizing agents, are used for sizing paper. Volatile nitrogen containing bases, such as ammonium hydroxide and tertiary amines, are used as emulsifying agents to aid in forming aqueous emulsions of lipophilic sizing agents. Preferred lipophilic sizing agents are heterocyclic organic compounds which are formed by the reaction of a dicarboxylic acid anhydride and a long chain hydrocarbon.

    CONTINUOUS PROCESS FOR MAKING ALKYL ALDOSIDES FROM STARCH OR OTHER CARBOHYDRATES

    公开(公告)号:CA1114369A

    公开(公告)日:1981-12-15

    申请号:CA313923

    申请日:1978-10-23

    Abstract: A continuous process for making alkyl alclosides from polysaccharides and more particularly mixed alkyl glycosides from starch by direct alcoholysis. A polysaccharide, such as starch, is slurried in an alcohol and passed through a heated, confined zone under pressure in the presence of an acid catalyst to form a mixed alkyl aldoside. The alcohols which may be used include methanol, ethanol, propanol and butanol, their isomers and mixtures thereof. Higher alkyl glycosides are surfactants and, in some instances, it is advantageous to use higher alcohols, such as decyl and dodecyl alcohols, to obtain particular surfactant properties in the resulting alkyl glycosides. Mixed alkyl glycosides are useful in detergent applications, and as backbone polymers in polyurethane foams.

    METHOD OF USING RECYCLED MOTHER LIQUORS TO PRODUCE ALDOSIDES

    公开(公告)号:CA1143374A

    公开(公告)日:1983-03-22

    申请号:CA354196

    申请日:1980-06-17

    Abstract: Case 79009 METHOD OF USING RECYCLED MOTHER LIQUORS TO PRODUCE ALDOSIDES The present invention relates to the preparation of aldoside mixtures, recovering at least a portion of one aldoside component therefrom and reusing the remaining portion of the aldoside mixture prepare additional aldoside. The aldoside mixture may be prepared by slurrying the carbohydrate in alcohol and passing the slurry through a continuous reactor at an elevated temperature under fluid pressure in the presence of an acid catalyst. The resultant aldoside mixture may then be partitioned into a mother liquor portion and an aldoside portion by selectively recovering at least a portion of one aldoside from the crude aldoside mixture with the remaining mother liquor being recycled. Crude glycoside mixtures prepared from starch and methanol slurries are suitable substrates for selectively recovering methyl-alpha- D-gluocpyrenoside. The methyl-alpha-D-gluccpyranoside may be easily crystallized and recovered from the glycoside mixture because of its lower solubility in methanol. me resultant mother liquor (rich in the ramaining components of the glycoside mixture) in combination with freshly added starch and methanol provides a reaction medium which optimizes methyl-alpha-D-glucopyranoside production.

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