Carboxymethyl cellulose (CMC) is a non-toxic and tasteless white flocculent powder with stable performance and easy to dissolve in water. Its aqueous solution is neutral or alkaline transparent viscous liquid, soluble in other water-soluble adhesives and resins, and insoluble in organic solvents such as ethanol. CMC can be used as binder, thickener, suspension agent, emulsifier, dispersant, stabilizer, sizing agent, etc.
Sodium carboxymethyl cellulose (CMC) is the largest yield of cellulose ether, the most widely used, the most convenient product, commonly known as "industrial MSG".
1, for oil, natural gas drilling, digging and other projects
① The slurry containing CMC can form a thin and firm filter cake with low permeability on the well wall and reduce the water loss.
After CMC is added to the mud, the rig can get a low initial cutting force, so that the mud is easy to release the gas wrapped in it, and the debris is quickly abandoned in the mud pit.
(3) Drilling mud, like other suspended dispersions, has a certain existence period, and the addition of CMC can make it stable and extend the existence period.
Slurry containing CMC is rarely affected by mold, so it is not necessary to maintain a high PH and use preservatives.
⑤ Containing CMC as drilling mud washing fluid treatment agent, can resist various soluble salt pollution.
The slurry containing CMC has good stability and can reduce water loss even if the temperature is above 150 ° C. High viscosity and high substitution CMC is suitable for low density mud, low viscosity and high substitution CMC is suitable for high density mud. The selection of CMC should be determined according to different conditions such as mud type, region and well depth.
2, for textile, printing and dyeing industry, the textile industry will CMC as sizing agent, used for cotton, silk wool, chemical fibers, blends and other strong yarn sizing;
3, for the paper industry CMC in the paper industry can be used as paper smoothing agent, sizing agent. The addition of 0.1% to 0.3% CMC in the pulp can enhance the tensile strength of the paper by 40% to 50%, increase the compressive rupture degree by 50%, and increase the kneading property by 4 to 5 times.
4, CMC added to synthetic detergent can be used as dirt adsorbent; Daily chemical such as toothpaste industry CMC glycerol solution is used as the glue base of toothpaste; Used as thickener and emulsifier in pharmaceutical industry; CMC aqueous solution is used for flotation beneficiation after viscosification.
5, used in the ceramic industry can be used as blank adhesive, plasticizer, glaze suspension agent, fixing agent, etc.
6, used in construction, improve water retention and strength
7, used in the food industry, the food industry uses high replacement degree CMC as ice cream, canned, quick cooking noodles thickener, beer foam stabilizer, etc., in the processing of jam, sugar juice, sherbet, dessert, ice cream drinks, etc., as a thickener, binder or shape agent.
8, the pharmaceutical industry chooses appropriate viscosity CMC as the adhesive, disintegrator of tablets, suspension aid, etc.
The high-end replacement product of extended carboxymethyl cellulose (CMC) is polyanionic cellulose (PAC), also an anionic cellulose ether, with higher degree of substitution and uniformity of substitution, shorter molecular chain, and more stable molecular structure, so it has better salt resistance, acid resistance, calcium resistance, high temperature resistance and other properties, and solubility is also enhanced. It is used in all industries where carboxymethyl cellulose (CMC) can be used to provide better stability and meet higher process requirements.
