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Cellulose sulfates

Cellulose sulfated usiag sulfamic acid degrades less than if sulfated usiag sulfuric acid (23). Cellulose esters of sulfamic acids are formed by the reaction of sulfamyl haHdes ia the presence of tertiary organic bases (see Cellulose esters). [Pg.62]

Ca.ta.lysts for Acetylation. Sulfuric acid is the preferred catalyst for esterifying cellulose and is the only known catalyst used commercially for this function. The role of sulfuric acid during acetylation has been discussed (77,78). In the presence of acetic anhydride, sulfuric acid rapidly and almost quantitatively forms the cellulose sulfate acid ester (77). Even in the absence of anhydride, the sulfuric acid is physically or mechanically retained (sorbed) on the cellulose. The degree of absorption is a measure of the reactivity or accessibiUty of different celluloses. [Pg.253]

Sulfuric acid reacts with acetic anhydride to form acetylsulfuric acid (79). This reaction is favored by low temperature and high anhydride concentration. In cellulose acetylation, probably both sulfuric acid and acetylsulfuric acid exist and react with cellulose to form cellulose sulfate acid ester. [Pg.253]

The GBR resin works well for nonionic and certain ionic polymers such as various native and derivatized starches, including sodium carboxymethylcel-lulose, methylcellulose, dextrans, carrageenans, hydroxypropyl methylcellu-lose, cellulose sulfate, and pullulans. GBR columns can be used in virtually any solvent or mixture of solvents from hexane to 1 M NaOH as long as they are miscible. Using sulfonated PDVB gels, mixtures of methanol and 0.1 M Na acetate will run many polar ionic-type polymers such as poly-2-acrylamido-2-methyl-l-propanesulfonic acid, polystyrene sulfonic acids, and poly aniline/ polystyrene sulfonic acid. Sulfonated columns can also be used with water glacial acetic acid mixtures, typically 90/10 (v/v). Polyacrylic acids run well on sulfonated gels in 0.2 M NaAc, pH 7.75. [Pg.400]

Sodium carboxymethyl cellulose (SS) Sodium cellulose sulfate (SS)... [Pg.498]

Several anionic carbohydrate polymers (e.g., carboxymethyl cellulose, xanthomonas campestris polysaccharide, cellulose sulfate ester, etc.) do not adsorb from fresh water solutions, but their adsorption in saline solutions plays an... [Pg.95]

Cellulose Sulfate Polydiallyl dim ethyl ammonium chloride - 44... [Pg.4]

Cellulose Sulfate (Sodium) - 0.2-2.0 Janssen Chimica, Geel, Belgium... [Pg.5]

Cellulose Sulfate Medium Permanent Medium Rigid Cyclic Side Chain Strong... [Pg.12]

Cellulose Sulfate Chondroitin 4-Sulfate Chondroitin 6-Sulfate Dextran Sulfate Gellan Gum Gelatin A (pH = 9.0) Gelatin B (pH = 6.5)... [Pg.22]

Polymer Media Alginate (Sodium) Cellulose Sulfate Carboxy- methyl Cellulose Xanthan Carrageenan (A) Gellan Gum Poly Glutamic Acid... [Pg.26]

Cellulose Sulfate Poly- l-methyl-2-vinylpyridinium Brom ide R/F C/L P/P M/H M/H... [Pg.43]

Cellulose Sulfate/Chitosan/ (No Coating) T D/A Capsules Fuse Together... [Pg.47]

Chitosan/ Pentasodiumtripoly-phosphate Hexahydrate/ Carrageenan-A or Cellulose Sulfate NT A/R Chitosan is Cytotoxic... [Pg.47]

HV Alginate/Cellulose Sulfate Polymethylene-co-guanidine/ Calcium Chloride 1... [Pg.61]

HV Alginate/Cellulose Sulfate Polydimethylamine-co-epichlorohydrin modified,quaternary 2... [Pg.61]

HV Alginate/Cellulose Sulfate Polyvinylamine/Calcium Chloride 3... [Pg.61]

HV Alginate/Cellulose Sulfate Polylysine/Calcium Chloride 4... [Pg.61]

Alginate/Cellulose Sulfate Spermine/Polydimethylene-co-guanidine 7... [Pg.62]

LE-Pectin/Cellulose Sulfate Quart-Polyamine/Calcium Chloride 11... [Pg.62]

See other pages where Cellulose sulfates is mentioned: [Pg.180]    [Pg.180]    [Pg.180]    [Pg.295]    [Pg.265]    [Pg.316]    [Pg.530]    [Pg.411]    [Pg.436]    [Pg.139]    [Pg.139]    [Pg.18]    [Pg.35]    [Pg.38]    [Pg.41]    [Pg.42]    [Pg.43]    [Pg.43]    [Pg.43]    [Pg.43]    [Pg.46]    [Pg.48]    [Pg.52]    [Pg.54]    [Pg.57]    [Pg.61]   
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See also in sourсe #XX -- [ Pg.322 ]

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Cellulose nitrate sulfate groups

Cellulose sulfate esters

Cellulose sulfate esters Applications

Cellulose sulfate gelatinization

Cellulose sulfate preparation

Cellulose sulfate structure

Cellulose sulfated

Cellulose sulfated

Cellulose, acid sulfate, carboxymethylation

Pyrolysis of cellulose nitrate, sulfate, and phosphate

Sodium cellulose sulfate

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