Carboxymethylcellulose (CMC) is a non-toxic, odorless white flocculent powder with stable performance and is easily soluble in water. Its aqueous solution is a neutral or alkaline transparent viscous liquid, soluble in other water-soluble glues and resins, and insoluble in organic solvents such as ethanol. CMC can be used as a binder, thickener, suspending agent, emulsifier, dispersant, stabilizer, sizing agent, etc.
Carboxymethyl cellulose (CMC) is the product with the largest output, the widest range of uses, and the most convenient use among cellulose ethers, commonly known as "industrial monosodium glutamate".
1. Used in oil and natural gas drilling, well digging and other projects
① CMC-containing mud can make the well wall form a thin and firm filter cake with low permeability, reducing water loss.
② After adding CMC to the mud, the drilling rig can get a low initial shear force, so that the mud can easily release the gas wrapped in it, and at the same time, the debris can be quickly discarded in the mud pit.
③ Drilling mud, like other suspensions and dispersions, has a certain shelf life. Adding CMC can make it stable and prolong the shelf life.
④ CMC-containing mud is rarely affected by mold, so it is not necessary to maintain a high pH value and use preservatives.
⑤ Contains CMC as a treatment agent for drilling mud flushing fluid, which can resist the pollution of various soluble salts.
⑥ CMC-containing mud has good stability and can reduce water loss even if the temperature is above 150°C.
CMC with high viscosity and high degree of substitution is suitable for mud with low density, and CMC with low viscosity and high degree of substitution is suitable for mud with high density. The choice of CMC should be determined according to different conditions such as mud type, region, and well depth.
2. Used in textile, printing and dyeing industries. In the textile industry, CMC is used as a sizing agent for light yarn sizing of cotton, silk wool, chemical fiber, blended and other fabrics;
3. Used in paper industry CMC can be used as paper smoothing agent and sizing agent in paper industry. Adding 0.1% to 0.3% of CMC in the pulp can increase the tensile strength of the paper by 40% to 50%, increase the crack resistance by 50%, and increase the kneading property by 4 to 5 times.
4. CMC can be used as a dirt adsorbent when added to synthetic detergents; daily chemicals such as toothpaste industry CMC glycerol aqueous solution is used as toothpaste gum base; pharmaceutical industry is used as a thickener and emulsifier; CMC aqueous solution is used as a float after thickening Mining and so on.
5. It can be used as adhesive, plasticizer, suspending agent of glaze, color fixing agent, etc. in the ceramic industry.
6. Used in construction to improve water retention and strength
7. Used in the food industry. The food industry uses CMC with a high degree of replacement as a thickener for ice cream, canned food, instant noodles, and a foam stabilizer for beer. For thickeners, binders or conformal agents.
8. The pharmaceutical industry chooses CMC with appropriate viscosity as the binder, disintegrating agent of tablets, and suspending agent of suspensions, etc.
