Chuangyao CMC


CMC cellulose ether produced by Shandong chuangyao Biotechnology Co., Ltd. has the functions of thickening, film-forming, adhesion, water retention, colloid protection, emulsification and suspension. It is widely used in oil, food, medicine, textile and papermaking industries, and is one of the most important cellulose ethers.

Reaction principle

The main chemical reactions of chuangyao CMC are the alkalization of cellulose and alkali to alkali cellulose and the etherification of alkali cellulose and monochloroacetic acid.

Step 1: alkalization: [c6h7o2 (OH) 3] n + nnaoh → [c6h7o2 (OH) 2ona] n + nH2O

Step 2: etherification: [c6h7o2 (OH) 2ona] n + nclch2coona → [c6h7o2 (OH) 2och2coona] n + nnacl

Chemical property

The cellulose derivative of carboxymethyl substituent was treated with sodium hydroxide to form alkali cellulose, and then reacted with monochloroacetic acid. The glucose unit of cellulose has three replaceable hydroxyl groups, so products with different degree of displacement can be obtained. On average, 1 mmol carboxymethyl per 1g of dry weight is insoluble in water and dilute acid, but it can be used for ion exchange chromatography. Carboxymethyl PKA is about 4 in pure water and 3.5 in 0.5mol/l NaCl. It is a weak acid cation exchanger, usually used for the separation of neutral and basic proteins above pH4. More than 40% hydroxyl groups can be dissolved in water to form stable high viscosity colloidal solution.

Main uses

Chuangyao brand carboxymethylcellulose (CMC) is a nontoxic and tasteless white flocculent powder, which has stable performance and is easily soluble in water. Its aqueous solution is a 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, suspending agent, emulsifier, dispersant, stabilizer, sizing agent, etc.

Sodium carboxymethylcellulose (CMC), commonly known as "industrial monosodium glutamate", is the most widely used and convenient product among cellulose ethers.

1、 It is used in oil and gas drilling, well digging and other projects. Recommended brand: (chuangyao oil well drilling grade carboxymethylcellulose)

1. The mud with CMC has good stability, and can reduce water loss even when the temperature is above 150 ℃.

2. The mud containing CMC can make the well wall form thin and hard filter cake with low permeability, and reduce the water loss.

3. Mud containing CMC is rarely affected by mold, so it is unnecessary to maintain high pH value and use preservative.

4. Drilling mud, like other suspended dispersions, has a certain period of existence, which can be stabilized and extended by adding CMC.

5. After adding CMC into the mud, the drilling machine can get low initial shear force, which makes the mud easy to release the gas wrapped in it, and at the same time, the debris can be quickly discarded in the mud pit.

6. CMC can be used as the treatment agent of drilling mud washing fluid, which can resist the pollution of various soluble salts.

CMC with high viscosity and substitution degree is suitable for mud with low density, while CMC with low viscosity and high substitution degree is suitable for mud with high density. CMC should be selected according to mud type, area, well depth and other different conditions.

2、 CMC is used as sizing agent in textile, printing and dyeing industry, and it is used for sizing of cotton, silk wool, chemical fiber, blended and other strong fabrics; recommended brand: (chuangyao textile printing and dyeing grade carboxymethylcellulose)

3、 CMC used in papermaking industry can be used as paper smoothing agent and sizing agent in papermaking industry. Adding 0.1% ~ 0.3% CMC to the pulp can increase the tensile strength of the paper by 40% ~ 50%, the compression rupture degree by 50%, and the kneading ability by 4 ~ 5 times. Recommended brand: (chuangyao grade carboxymethylcellulose)

4、 CMC can be used as dirt adsorbent when it is added into synthetic detergent; daily chemicals such as glycerin aqueous solution of CMC in toothpaste industry can be used as gum base of toothpaste; pharmaceutical industry can be used as thickener and emulsifier; CMC aqueous solution can be used as floating mineral processing after viscosity is increased. Recommended brand: (chuangyao daily chemical grade carboxymethylcellulose)

5、 It can be used as adhesive, plasticizer, suspending agent and fixing agent in ceramic industry. Recommended brand: (chuangyao ceramic grade carboxymethylcellulose)

6、 Recommended brand for building to improve water retention and strength: (chuangyao building material grade carboxymethylcellulose sodium)

Seven, for the food industry, the food industry uses high degree of substitution CMC as ice cream, canned food, instant noodles thickener, foam stabilizer for beer, etc. in processing jam, syrup, fruit syrup, dim sum, ice cream drinks and so on as thickener, binder or agent. Recommended brand: (chuangyao food grade CMC)

8、 In pharmaceutical industry, CMC with proper viscosity is selected as the binder, disintegrator of tablets and suspension aid of suspension. Recommended brand: (chuangyao medical grade CMC)

Dissolution method

Mix chuangyao brand CMC with water directly, prepare paste glue liquid, and reserve. When configuring CMC paste, first add a certain amount of clean water into the mixing tank with the mixing device, and when the mixing device is turned on, slowly and evenly sprinkle CMC into the mixing tank, stirring continuously, so that CMC and water are completely integrated and CMC can be fully dissolved. When dissolving CMC, the reason why CMC should be evenly distributed and continuously stirred is "to prevent the problems of agglomeration, agglomeration and reducing CMC dissolution when CMC meets water", and to improve the dissolution speed of CMC. Generally speaking, the mixing time is much shorter than the time required for CMC to fully dissolve, and the time required for both depends on the specific situation.

The basis for determining the mixing time is: when CMC is evenly dispersed in water and there is no obvious large lumpy object, the mixing can be stopped and C


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