Preparation of carboxymethyl cellulose (CMC) using the waste liquor of the viscose fiber industry
[1]ZHOU Cai-rong,XU Min-qiang,WANG Xiao-song,et al.Preparation of carboxymethyl cellulose (CMC) using the waste liquor of the viscose fiber industry[J].Journal of Zhengzhou University (Engineering Science),2015,36(01):33-36.[doi:10.3969/j.issn.1671-6833.2015.01.008]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36
Number of periods:
2015 01
Page number:
33-36
Column:
Public date:
2015-01-10
- Title:
- Preparation of carboxymethyl cellulose (CMC) using the waste liquor of the viscose fiber industry
- Keywords:
- viscose fiber ; spent caustic ; CMC
- CLC:
- TQ0352.7 TQ0352.9
- Abstract:
- In view of the actual problem and the characteristics of carboxymethyl cellulose ( CMC) synthesisprocess,the waste liquor of the viscose fiber industry as main raw materials with wood pulp was used for pro-ducing carboxymethyl cellulose (CMC). The effect of gradient heating in ethrification process,along with theaddition of urea,sodium silicate sodium in alkalization process and the addition of tetraborate in the etherifica-tion process on the properties of the modified CMC were studied and explored by single factor test.The resultsshow that the modified CMC with the best properties were obtained by third-order heating ( first-order tempera-ture of 55 ℃,temperature of the second order of 70 ℃,and third-order temperature of 80 C ) for etherifica-tion reaction. Meanwhile, 3% urea and 5% alkaline sodium silicate were also added in alkalization process,and 6% tetraborate was added in the etherification process.The viscosity of the product CMC was up to 2486.7 MPa· s,the substitution degree was 0.65,the acid-viscosity ratio was 0.416,salt-viscosity ratio was 0.547. Compared with previous modified CMc，the indexes were promoted by 97.17%,23.63%,57.53%and 45.55 % for aboved-mentioned performances,respectively.
- References:
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