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Production method of technical-grade sodium carboxymethylcellulose

A technology of sodium carboxymethyl cellulose and a production method, which are applied in the field of sodium carboxymethyl cellulose production, can solve the problems of excess quality and high cost of production technical-grade sodium carboxymethyl cellulose, simplify production equipment, increase Water consumption and cost reduction effect

Active Publication Date: 2014-02-05
泸州北方纤维素有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of only the solvent method production line, the production of technical grade sodium carboxymethylcellulose has the problems of excess quality and high cost. Under this premise, it is particularly important to reduce costs through new production processes

Method used

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  • Production method of technical-grade sodium carboxymethylcellulose
  • Production method of technical-grade sodium carboxymethylcellulose
  • Production method of technical-grade sodium carboxymethylcellulose

Examples

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Embodiment 1

[0051] Steps include:

[0052] a. Prepare the solution: add 120L 92%~95%v / v alcohol and 20L water into the mixing tank, then add 40L48.0%~50.0%w / w liquid caustic soda, start stirring at the same time, add 2kg mass fraction 5min before the start of step b ≥27.5% hydrogen peroxide is added to the mixing tank, and the temperature of the resulting mixture is 35°C to 40°C;

[0053] b. Alkalization reaction: within 10 minutes, put 60kg of flaky low-viscosity wood pulp with cp≤30mpa s and 40kg of flocculent low-viscosity wood pulp with cp≤30mpa s into the kneader, and at the same time, put the mixed solution prepared in step a Add it into the kneader, the mixed liquid is added 2 minutes later than the wood pulp, and at the same time control the temperature T3 in the kneader to be 30°C≤T3≤40°C; put 20kg≥98% caustic soda into the kneader for alkalization reaction; step b The reaction time is 80 minutes, and the alkalization reaction temperature T4 is controlled to be 30°C≤T4≤50°C;

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Abstract

The invention belongs to the field of production of sodium carboxymethylcellulose, and specifically relates to a production method of technical-grade sodium carboxymethylcellulose, wherein the method is low in production cost and can be carried out on a solvent method production line. The method comprises the following steps: a, preparation of liquor; b, alkalization reaction; c, acidification and etherification. The purpose of production on the original solvent method production line is realized by adopting a method of increasing the water content of a reaction system and reducing the use level of alcohol of the reaction system by means of adjusting and controlling parameters of the reaction system; the cost of producing technical-grade sodium carboxymethylcellulose [CMC-LVT (Carboxymethylcellulose-Low Viscosity Technical) and CMC-HVT (Carboxymethylcellulose-How Viscosity Technical)] by the original solvent method is lowered.

Description

technical field [0001] The invention belongs to the production field of sodium carboxymethyl cellulose, and in particular relates to a production method of technical grade sodium carboxymethyl cellulose. Background technique [0002] Technical grade sodium carboxymethyl cellulose product is an earlier product type of petroleum technical grade sodium carboxymethyl cellulose in China. There are mainly two types of CMC-LVT and CMC-HVT. The indicators of these two products are characterized by purity requirements Low, only moisture and performance indicators are required in the national standard, and other physical and chemical indicators such as viscosity, degree of substitution, and PH value are not required; but the performance indicators are strict; the market is characterized by low price, but it is suitable for shallow wells and deep wells. The dosage is huge. [0003] The production process of the water medium method is to react the alkali cellulose with the etherificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/12
Inventor 罗南斌高汕张大龙唐利春明浩杨康伦
Owner 泸州北方纤维素有限公司
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