Keltrol

Keltrol Xanthan/0.3% Cellulose Sulfate 10% Polymethylene-co-guanidine NT Smooth, Good Mechanical Stability 18/15... 

Fig. 14. Spatial distribution of the gas hold-up in a turbulent stirred vessel filled with a 0.075% Keltrol solution in water and agitated by a Rushton turbine (a) experimental data obtained by means of an optical probe (b) computational result from DAWN. Overall hold-up amounts to some 3.1% in the simulation and 3.7% in the experiment. Reproduced with permission from Venneker...

Xanthan Gum/Keltrol/Kelzan/A Natural Biopolysaccharide for Scientific Water Control, Kelco Company, San Diego, California, 2nd Edition, 1975. 

Sustained-release agents (gum/viscous) Veegum, Keltrol T -/-... 

Corn sugar gum E415 Keltrol polysaccharide B-1459 Rhodigel Vanzan NF Xantural. 

Particle size distribution various grades with different particle sizes are available for example, 100% less than 180 pm in size for Keltrol CG 100% less than 75 pm in size for Keltrol CGF 100% less than 250 pm, 95% less than 177 pm in size for Rhodigel 100% less than 177 pm, 92% less than 74 pm in size for Rhodigel 200. 

Thickeners and other additives In some cases a gel coating for the multiple emulsion drops may be beneficial, for example polymethacryhc acid or carboxymethyl cellulose. Gels in the outside continuous phase for a W/O/W multiple emulsion may be produced using xanthan gum (Keltrol or Rhodopol), Carbopol or alginates. 

Several examples of W/O emulsions and W/O/W multiple emulsions based on the block copolymer of PHS-PEO-PHS, have been produced. As an illustration, a typical formulation of W/O/W multiple emulsion is described below, using two different thickeners, namely Keltrol (xanthan gum from Kelco) and Carbopol 980 (a crosshnked polyacrylate gel produced by BF Goodrich). These thickeners were added to reduce creaming of the multiple emulsion. A two-step process was used in both cases. 

To reduce sedimentation, a high-molecular-weight material is usually added, such as hydroxyethyl cellulose or xanthan gum (Kelzan, Keltrol or Rhodopol). Above a critical concentration, C, such polymer solutions show non-Newtonian flow in aqueous solution this is illustrated in Figure 21.4, which shows the variation of shear stress and viscosity with shear rate [1]. 

Two emulsifier systems were used for the preparation of O/W emulsions. The first emulsifier was Synperonic PEE 127, an A-B-A block copolymer of poly(ethylene oxide), PEO (the A chains, were about 100 EO units each) and propylene oxide PPO (the B chain was about 55 PO units), supplied by UNIQEMA. The second emulsifier system was Arlatone V-100 (supplied by UNIQEMA), a nonionic emulsifier system composed of a blend of Steareth-100 (stearyl alcohol with 100 EO units), Steareth-2 (stearyl alcohol with 2 EO units), glyceryl stearate citrate, sucrose, and a mixture of two polysaccharides, namely mannan and xanthan gum (Keltrol F, supplied by Kelco). In some emulsions, xanthan gum was used as a thickener. AH emulsions contained a preservative (Nipaguard BPX). 

Keltrol . [Kelco] Xanthan gum stabilizer for foods thickener and emulsion stabilizer for creams and lodons binder in toothpastes suspending agent. 

Experiments were conducted at room temperature. Water was used as the Newtonian fluid. Non-Newtonian liquids included aqueous solutions ofXanthan gum (Keltrol T, Kelco-Merck) as shear-thinning fluids. Solutions were prepared at constant ionic strength by adding 0.1% (w/v) NaCl. These fluids were selected because they had similar rheological properties to several anaerobic media [6-9] and they are clear fluids that allowed flow pattern visualizations. 

Materials and Methods. The xanthan sample employed was a commercial dry powder (Keltrol) from Kelco Co. Samples were hydrated without further purification by overnight stirring in deionized water, then diluted with predissolved buffer concentrate to a final solvent containing 0.8M NaCl, 0.04 M PO4,. 02% NaN3, pH 7. 

Properties Gardner 3 max. color dens. 9.06 Ib/gal (solids) vise. 15-30 stokes acid no. 57-63 (solids) 75 1% solids Keltrol 1001-M-60 [Reichhoid]... 

Keltrol [CP Kelco http //www.cpkelco.com]] Keltrol 521 [CP Kelco http //www.cpkelco.com]] Keltrol 1000 flCP Kelco http //www.cpkelco.com]] Keltrol BT [CP Kelco http //www.cpkelco.com]] Keltrol CG [CP Kelco http //www.cpkelco.com] Keltrol CG 1000 t[CP Kelco http //www.cpkelco.com]] Keltrol CG BT [CP Kelco http //www.cpkelco.com]] Keltrol CG F [CP Kelco http //www.cpkelco.com]] Keltrol CG GM t[CP Kelco http //www.cpkeico.com]] Keltrol CG RD [CP Kelco http //WWW. cpkeico. com]... 

Keltrol RH/D [CP Kelco http //www.cpkeico.com]] Keltrol SF [CP Kelco http //www.cpkelco.com]] Keltrol T [CP Kelco http //www.cpkelco.com]] Keltrol T 622 [CP Kelco http //www.cpkelco.com]] Keltrol ... 

Keltrol 521 Keltrol 1000 Keltrol BT Keltrol CG Keltrol CG 1000 Keltrol CG BT Keltrol CG F Keltrol CG GM Keltrol CG RD Keltrol CG SF Keltrol CG T Keltrol CG TF Keltrol CR Keltrol F Keltrol GM Keltrol HP Keltrol HP 594 Keltrol RD 576 Keltrol RD Keltrol RH/D Keltrol SF Keltrol T Keltrol T 622 Keltrol TF Kelzan ... 

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