carboxymethylcellulose, pain reliving glimepiride, sodium ...

FIELD: method for production of carboxymethyl esters useful as adsorbents.
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Gum, Starch and Carboxymethyl Cellulose as precursors.

SUBSTANCE: invention may be used for production of cellulose derivatives, namely sodium salt of carboxymethylcellulose. Cellulose and solution of sodium hydroxide of specified concentration is supplied to hydropulper 1, where pieces of cellulose are broken by rotary mixer. Produced suspension from hydropulper is supplied into loading zone of inclined helical conveyor 5, where cellulose activated mass is released from part of liquid phase. Then activated cellulose mass is supplied to loading zone of double-auger apparatus 6. In double-auger apparatus 6 cellulose mass is compressed, crushed and unloaded with specified humidity into bunker of activated cellulose mass hopper 9. Then activated cellulose mass and salt of chloroacetic acid is supplied into preliminary mixer 10, where components are mixed and partially react with creation of sodium salt of carboxymethylcellulose. Then mixture is sent to loading zone of double-auger apparatus 12, where components are evenly distributed in volume of mass, and reaction of carboxymethylation is realised. Produced loose powder with specified humidity is supplied to auger apparatus 14.

FIELD: method for production of carboxymethyl esters useful as adsorbents.
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of the inducer CMC (carboxymethyl ...

1. The method of obtaining polyanionic cellulose, including activation of cellulose, its flow in co-rotating twin screw multi-zone reactor-mixing machine, the introduction of sodium hydroxide in aqueous solution and a sodium salt of monochloracetic acid, intensive mixing and drying, characterized in that the intensive mixing is carried out in two or more successive reactor-mixing machines when the fill factor of the volume of 0.7-0.9, the resulting product after each intensive mixing is passed to the next reactor and mixing machine by the conveying device, with sodium hydroxide in aqueous solution is injected in the amount of 0.9 to 1.2 mol per 1 mol of cellulose, before each intensive is the first stirring further added sodium hydroxide in aqueous solution in one step or equal portions in the amount of 0.4-0.6 mol per 1 mol of cellulose.

converted to these strands; carboxymethyl cellulose and other compounds ...
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SUBSTANCE: claimed method includes preliminary removing from air-dry lignocarbohydrate material of extractive and water soluble substances by 3-steps subsequent extraction with alcohol/benzene mixture, hot water and cold water. Then macromolecules are cross-linked by polycondensation of extracted material with formaldehyde in ratio lignocarbohydrate material OH-groups/formaldehyde of 1:3-5 in presence of alkali catalyst. Cross-linked lignocarbohydrate material is washed and carboxymethylated with monochloroacetic acid and alkali in ratio lignocarbohydrate material OH-groups/ClCH2COOH/NaOH of 1:3:27 at 45-65°C for at least 3 h. Obtained product is separated, treated with mineral acid to convert carboxylic groups to H-form; washed with water up to neutral filtrate pH-value, and dried.

Tetrabutylurea|Ethanol|Ethyl centralite|Polyanionic cellulose--ChangFeng Chemical Co.,Ltd.
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Product Name: Polyanionic Cellulose; ..

SUBSTANCE: invention relates to production of high-molecular weight substances, in particular carboxymethylcellulose sodium salt with high substitution degrees, which is characterized by uniform distribution of carboxyl groups, that is polyanionic cellulose applicable as thickener and emulsifier in papermaking, textile, and oil and gas producing industries. Process is accomplished through activation of cellulose followed by feeding the same on twin-screw multizone reactor-mixing machine, addition of sodium hydroxide in the form of aqueous solution in amount 0.9-1.2 mole per 1 mole cellulose and sodium monochloroacetate, and finally intensive stirring of resulting product in one or several in series arranged reactor-mixing machines while additionally introducing sodium hydroxide in the form of aqueous solution in amount 0.4-0.6 mole per 1 mole cellulose all in one time or in equal portions. Transfer of into next reactor-mixing machine is accomplished with the aid of transportation means.

Polyanionic cellulose production process - …

SUBSTANCE: invention relates to production of high-molecular weight substances, in particular carboxymethylcellulose sodium salt with high substitution degrees, which is characterized by uniform distribution of carboxyl groups, that is polyanionic cellulose applicable as thickener and emulsifier in papermaking, textile, and oil and gas producing industries. Process is accomplished through activation of cellulose followed by feeding the same on twin-screw multizone reactor-mixing machine, addition of sodium hydroxide in the form of aqueous solution in amount 0.9-1.2 mole per 1 mole cellulose and sodium monochloroacetate, and finally intensive stirring of resulting product in one or several in series arranged reactor-mixing machines while additionally introducing sodium hydroxide in the form of aqueous solution in amount 0.4-0.6 mole per 1 mole cellulose all in one time or in equal portions. Transfer of into next reactor-mixing machine is accomplished with the aid of transportation means.

the presence of polyanionic cellulose ..

FIELD: production of carboxymethyl cellulose (CMC) sodium salt useful as thickening agent and emulsifier in paper, textile and petroleum industry.