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Method for preparing high-viscosity sodium carboxymethyl cellulose by utilizing potato starch residues

A technology of sodium carboxymethyl cellulose and potato starch residue, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve problems such as expensive raw materials, and achieve the effects of low production cost, improved product purity, and improved viscosity.

Inactive Publication Date: 2010-09-15
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of method that utilizes potato starch residue to prepare high-viscosity sodium carboxymethyl cellulose, to solve the problem that the raw material is more expensive in the traditional method for preparing sodium carboxymethyl cellulose

Method used

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  • Method for preparing high-viscosity sodium carboxymethyl cellulose by utilizing potato starch residues

Examples

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Embodiment 1

[0027] 1. Preparation of refined cellulose: Add 30 g of potato starch residue and 67.5 g of sulfuric acid with a concentration of 20% in a three-necked bottle, acidify at room temperature for 3 hours, filter and wash with suction; add 90 g of potato starch residue with a concentration of 10 % sodium hydroxide, boiled in alkali at 80°C for 3h, suction filtered and washed; the potato starch slag after alkali cooking was added to 42g in a mass ratio of NaClO:H 2 o 2 = In a 3:4 bleaching solution, stir and bleach at 30°C for 20 minutes; dry at a temperature of 80°C before use.

[0028] 2. Preparation of sodium carboxymethyl cellulose: Add 5 g of refined cellulose and 50 g of ethanol with a concentration of 70% in a three-neck flask, stir and mix evenly, add 3.75 g of sodium hydroxide, and stir at 30°C for 80 minutes to alkalize; then add the concentration 17g of 70% ethanol, 7.0g of chloroacetic acid, after heating up to 70°C for 30min, add 1.25g of sodium hydroxide to the reacti...

Embodiment 2

[0033] 1. Preparation of refined cellulose: Add 30g of potato starch residue and 69g of sulfuric acid with a concentration of 20% in a three-necked bottle, acidify at room temperature for 4 hours, filter and wash with suction; add 100g of potato starch residue with a concentration of 10% after acidification In sodium hydroxide, cook in alkali at 90°C for 3 hours, filter and wash with suction; add the potato starch residue after alkali cooking to 43.5g with a mass ratio of NaClO:H 2 o 2 =3:4 bleaching solution, stirred and bleached at 25°C for 20min; dried at 90°C for later use.

[0034] 2. Preparation of sodium carboxymethyl cellulose: Add 5 g of refined cellulose and 52.5 g of ethanol with a concentration of 70% in a three-neck flask, stir and mix evenly, add 4.125 g of sodium hydroxide, stir and alkalize at 35°C for 60 min; then add Concentration of 70% ethanol 17.5g, chloroacetic acid 7.5g, after heating up to 70°C for 35min, add 1.375g of sodium hydroxide to the reaction ...

Embodiment 3

[0039] 1. Preparation of refined cellulose: Add 30 g of potato starch residue and 70.5 g of sulfuric acid with a concentration of 20% in a three-necked bottle, acidify at room temperature for 3 hours, filter and wash with suction; add 105 g of potato starch residue with a concentration of 10 % sodium hydroxide, boiled in alkali at 90°C for 4h, suction filtered and washed; the potato starch slag after alkali cooking was added to 45g and the mass ratio was NaClO:H 2 o 2 =3:4 bleaching solution, stirred and bleached at 30°C for 20min; dried at 90°C for later use.

[0040] 2. Preparation of sodium carboxymethylcellulose: Add 5g of refined cellulose and 55g of ethanol with a concentration of 70% in a three-neck flask, stir and mix evenly, then add 0.05g of sodium sulfite and 4.5g of sodium hydroxide in sequence, and stir at 35°C for alkalization 60min; then add 18g of ethanol with a concentration of 70% and 8.0g of chloroacetic acid, heat up to 75°C and react for 30min, then add 1...

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Abstract

The invention relates to a method for preparing high-viscosity sodium carboxymethyl cellulose by utilzing potato starch residues, which aims to solve the problem of more expensive raw material in the traditional sodium carboxymethyl cellulose preparation method. The sodium carboxymethyl cellulose is prepared by a solution medium method. The method mainly comprises the following two steps: (1) cellulose refinement: acidolysis, soda boiling, blanching and drying; and (2) etherification: alkalifying, etherifying, neutralizing, washing and drying. In addition, an antioxidant can be added to enhance the product viscosity. The invention can fully utilize the potato starch residues, lowers the production cost of the sodium carboxymethyl cellulose, protects the ecological environment and has higher economic and social significances.

Description

technical field [0001] The invention belongs to the technical field of sodium carboxymethylcellulose preparation, in particular to a method for preparing high-viscosity sodium carboxymethylcellulose from potato starch residue. Background technique [0002] Sodium carboxymethyl cellulose is a macromolecular chemical substance obtained by the etherification reaction of natural fibers with chloroacetic acid under alkaline conditions. When it swells in water, it can form a transparent viscous glue, which is neutral in terms of pH. Sodium carboxymethyl cellulose has many excellent unique properties. Its aqueous solution has the properties of binding, thickening, emulsifying, suspending, film-forming, protecting colloid, protecting water, resisting enzymolysis and metabolic inertness. It is widely used in construction, petroleum, etc. It is widely used in industrial production such as food, textile, detergent, paint, medicine, paper making and electronic components. The preparat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/12D21C5/00
Inventor 石赟武小莉白仲兰石辉文
Owner LANZHOU UNIVERSITY
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