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Method for producing potassium carboxymethylcellulose by using ultrasonic

A technology of carboxymethyl cellulose and ultrasound, applied in the field of production of carboxymethyl cellulose potassium, can solve the problems of low viscosity, low utilization rate of etherification agent, difficult to dissolve, etc., and achieve simple equipment cleaning and operation, batch production The effect of stable quality and expanding the scope of use

Inactive Publication Date: 2012-09-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the alkalinity of KOH is much greater than that of NaOH, the cellulose is severely degraded during the alkalization process, and high-viscosity products cannot be obtained. Water absorption, carbon dioxide absorption and price are much higher than NaOH, and KOH contains a certain amount of Na + (Analytical pure Na salt ≤ 2%, GB / T2306), the amount of KCl used is not as large as that of NaCl, and the use range of KCl is not as wide as that of NaCl
Therefore, produce carboxymethyl cellulose potassium with the technological method of producing carboxymethyl cellulose sodium, the obtained product substitution degree is low, and viscosity is low, difficult to dissolve, Na content height, production cost height, severely limit carboxymethyl cellulose Use of Potassium Cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the first step, 51 g of food-grade sodium carboxymethylcellulose (FH6 type, DS=0.62, 1% aqueous solution viscosity (Brookfield) 250 mPa, purity 98.8%) was degassed for 5 minutes at a vacuum of 0.05 MPa, and filled with nitrogen. Add 10% H 2 SO 4 Aqueous solution 816mL;

[0028] The second step is ultrasonic treatment for 1 minute, the ultrasonic treatment frequency is 15kHz, and the power density is 1.5kW / m 3 , ultrasonic treatment twice for 3 minutes at intervals, 0.5 minutes each time, kept at 10°C for 1 hour, separated, kept at 10°C for 10 hours, separated, the solid was washed with water at pH = 1, and separated at 0°C to obtain a water content of 55%. solid;

[0029] The third step The solid obtained in the second step is subjected to ultrasonic treatment for 0.1 minutes under nitrogen protection, the ultrasonic treatment frequency is 15kHz, and the power density is 0.1kW / m 3 , temperature 25°C, add K 2 CO 3 99 copies, (NH 4 ) 2 CO 3 1.5 parts of alkali...

Embodiment 2

[0034] The first step will produce 65g of food-grade sodium carboxymethylcellulose (FH6 type, DS=0.62, 2% aqueous solution viscosity (Brookfield) 50mPa, purity 85.0%) without purification, and a vacuum degree of 0.10MPa is degassed for 20 minutes, Fill with nitrogen, add H with a mass concentration of 40% 2 SO 4 260mL aqueous solution;

[0035] The second step is ultrasonic treatment for 15 minutes, the ultrasonic treatment frequency is 104kHz, and the power density is 0.1kW / m 3 ;Sonicate 3 times with 1 minute interval, 5 minutes each time, keep warm at 40°C for 1 hour, separate, wash the solid with pH=3, 30°C, 80% ethanol water, and separate to obtain a solid with a water content of 65%;

[0036] The third step The solid obtained in the second step is subjected to ultrasonic treatment for 15 minutes under nitrogen protection, the ultrasonic treatment frequency is 104kHz, and the power density is 0.1kW / m 3 , temperature 35°C, add K 2 CO 3 99.5 parts, (NH 4 ) 2 CO 3 8.1...

Embodiment 3

[0041]In the first step, 40 g of food-grade sodium carboxymethylcellulose (FH9 type, DS=1.0, 1% aqueous solution viscosity (Brookfield) 400 mPa, purity 98.8%) was degassed for 10 minutes at a vacuum of 0.05 MPa, and filled with argon , adding 15% mass concentration of H 2 SO 4 300mL aqueous solution;

[0042] The second step is ultrasonic treatment for 10 minutes, the ultrasonic treatment frequency is 25kHz, and the power density is 0.5kW / m 3 ;Sonicate 5 times for 1.5 minutes intermittently, 2 minutes each time, keep warm at 10°C for 0.5 hours, separate, wash the solid with pH=1, 10°C, 80% methanol water, and separate to obtain a solid with a water content of 60%;

[0043] The third step The solid obtained in the second step is subjected to ultrasonic treatment for 10 minutes under the protection of argon, the ultrasonic treatment frequency is 252kHz, and the power density is 0.25kW / m 3 , temperature 30°C, add, K 2 CO 3 99.5 parts, (NH 4 ) 2 CO 3 1 part of alkali mixtu...

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Abstract

The invention discloses a method for producing potassium carboxymethylcellulose by using ultrasonic, which comprises the following steps of: adding acid solution into a sodium carboxymethylcellulose raw material, performing ultrasonic treatment, reacting the mixture at a set temperature, separating reaction product and removing centrifugal solution, adding alkali into the reaction product, and performing ultrasonic treatment, dehydration, drying and crushing to obtain a product. The potassium carboxymethylcellulose with high purity and high quality can be obtained. The method saves energy andtime and is simple and convenient to operate; and the obtained product has the characteristics of high performance and stable batch quality.

Description

technical field [0001] The invention relates to a production method of carboxymethyl cellulose potassium, in particular to a production method of carboxymethyl cellulose potassium. Background technique [0002] The national standard food additives GB2760-2007 lists carboxymethylcellulose sodium (CMC) as a list of additives that can be used in appropriate amounts in various foods according to production needs (A3, 53), and are widely used in beverages, dairy products, and ice cream , soy sauce, jelly, jam, instant noodles and other food industries. This means that in food production, CMC can be added in large quantities. However, studies have shown that diseases such as diabetes, hypertension, and cardiovascular disease are closely related to excessive intake of sodium ions. [0003] Reduce the total amount of sodium ions ingested by the human body. On the one hand, to appropriately reduce the intake of sodium and salt, an effective way is to increase the amount of potassi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/28C08L1/26
Inventor 熊犍叶君
Owner SOUTH CHINA UNIV OF TECH