Carboxymethyl cellulose (CMC) is a white and flowing fine powder. It is a cellulose derivative obtained by chemical modification the natural cellulose. Carboxymethyl cellulose is one of the most important water-soluble polymers with many advantages that other natural or synthetic glues do not have.
Carboxymethyl cellulose powder is tasteless, smells mold-proof, non-toxic, non-flammable, and easily dissolved in water.
Carboxymethyl cellulose solution is a transparent viscose solution. This solution has good thickening, adhering, emulsifying, and stabilizing properties. Membrane forming, moisture-holding, shape-holding, dispersing, and anti-enzyme.
Carboxymethyl cellulose solution can be mixed with dissolvable animal glues, glycerin, sorbitol, Arabic gum, pectin, xanthic gum, and dissolvable starch.
9000-11-7
[C6H7O2(OH)2CH2COONa]n
Physical specification of CMC for Oil drilling liquids & Oil drilling liquids properties (According to SY5093-92).
Item | LV-CMC | MV-CMC | HV-CMC |
---|---|---|---|
Appearance | White or light yellow powder, freely flowable | ||
Water, % | 10 Max. | 10 Max. | 10 Max. |
CMC, % | 80.0 Min. | 85.0 Min. | 95.0 Min. |
Substitution degree, % | 0.80 Min. | 0.65 Min. | 0.8 Min. |
pH Value | 7.0-9.0 | 7.0-9.0 | 6.5-8.0 |
Type | Item | Typical measured values | |||
---|---|---|---|---|---|
Distilled water | Brine | Saturated brine | |||
Base mud | Filtration loss, ml | 60±10 | 90±10 | 100±10 | |
Apparent viscosity, mPa·s | 6 Max. | 6 Max. | 10 Max. | ||
pH | 8.0±1.0 | 8.0±1.0 | 7.5±1.0 | ||
HV-CMC | Mud generating capacity, m3/t | 200 Min. | 150 Min. | 160 Min. | |
LV-CMC | Filtration loss = 10ml | Addition rate, g/l | — | 7.0 Max. | 10.0 Max. |
Apparent viscosity, mPa·s | — | 4.0 Max. | 6.0 Max. | ||
MV-CMC | Addition rate, g/l | 6.0 | 14.0 | 3.5 | |
Apparent viscosity,mPa·s | 15 Min. | 15 Min. | 15 Min. | ||
Filtration loss, ml | 9 Max. | 9 Max. | 9 Max. |
Technical specification of CMC for oil drilling liquids (According to GB/T5005-2001 or API).
Type | Specification | ||
---|---|---|---|
CMC-HVT | Viscometer, 600r/min | Distilled water | 30.0 Min. |
40g/dm3 brine | 30.0 Min. | ||
Saturated brine | 30.0 Min. | ||
Filtration Loss, ml | 10.0 Max. | ||
CMC-LVT | Viscometer, 600r/min | 90.0 Max. | |
Filtration Loss, ml | 10.0 Max. |
CMC oil drilling grade is used in fracturing, drilling, and well-cementing fluid as a fluid loss controller and tackifier. Carboxymethyl cellulose can protect the shaft wall and prevent mud loss, thus enhancing recovery efficiency. CMC has the following characteristics.
Packed in multiple paper bags or fiber drums (25KG), or as per customer requirement, keep dry.
CMC chemical, CM cellulose, CMC polymer, carboxy methylated cellulose.
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