Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (08): 50-54.doi: 10.13475/j.fzxb.20190905306

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Sulfur black dyeing process with environment friendly reducing agent

LI Ruiqing1(), WANG Wei1, WEI Bingju1, ZHOU Changwen2, ZHANG Shutao2   

  1. 1. Suzhou CTES Research Institute of Fabric Industry, Suzhou, Jiangsu 215000, China
    2. Foshan Changran Technology Co., Ltd., Foshan, Guangdong 528000, China
  • Received:2019-09-23 Revised:2020-05-26 Online:2020-08-15 Published:2020-08-21

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Abstract:

In order to solve the serious polluting and unstable dyeing in the traditional sulfur black dyeing process, the composite reducing agent D was used as a sulfur black BR reducing agent to dye cotton yarns, and the dyeing performance and cleanliness of traditional alkali sodium were compared. The effects of mass concentrations of sulfur black BR, sodium hydroxide, composite reducing agent D, and dyeing temperature on the dyeing properties were analyzed. The experimental results show that under the conditions of mass concentrations of sulfur black BR 60 g/L, sodium hydroxide 20 g/L, composite reducing agent D 19 g/L, and dyeing temperature 95 ℃, the apparent color depth (K/S)value of the yarn is 46.88, the soaping fastness reaches 4-5, the dry rubbing fastness is 4 and the wet rubbing fastness is 2. The composite reducing agent D as a reducing agent is compared with the traditional sodium sulfide, and the K/S value of the yarn dyed with composite reducing agent D is better than that of with alkali sulfide process. The reducing sulfur element in the dyeing solution is reduced by 78.0%, and the chemical oxygen demand in the machine waste solution is reduced by 76.4%.

Key words: cotton yarn, sulphur dyes, composite reducing agent, dyeing property, environment friendly reducing agent

CLC Number: 

  • TS193.634

Fig.1

Effect of sulfur black BR mass concentration on K/S value of dyed yarn"

Fig.2

Effect of mass concentration of composite reducing agent D on K/S value of dyed yarn"

Fig.3

Effect of sodium hydroxide concentration on K/S value of dyed yarn"

Fig.4

Effect of dyeing temperature on K/S value of dyed yarn"

Tab.1

Reduction potential of dyeing solution after dyeing at different dyeing temperatures"

还原温度/℃ 还原电位/mV 还原温度/℃ 还原电位/mV
50 -690 85 -677
60 -688 90 -676
70 -686 95 -672
80 -679 100 -668

Tab.2

Sulphur black staining orthogonal experimental result"

试验编号 A
硫化黑BR
质量浓度/
(g·L-1)		 B
氢氧化钠
质量浓度/
(g·L-1)		 C
复合还原剂D
质量浓度/
(g·L-1)		 K/S值
1 50 19 18 27.05
2 50 20 19 29.25
3 50 21 20 39.82
4 60 19 19 40.06
5 60 20 20 46.88
6 60 21 18 33.76
7 70 19 20 32.15
8 70 20 18 35.39
9 70 21 19 36.54
k1 31.74 33.81 32.52
k2 40.72 40.02 41.09
k3 37.14 39.10 35.99
R 8.98 6.22 8.57

Tab.3

Potential value of dyeing liquid of two reducing agents and apparent color depth K/S of dyed yarn"

还原剂名称 染液起始电位/mV K/S值
复合还原剂D -715 46.88
硫化碱 -705 36.74

Tab.4

Comparison of cleanliness between composite reducing agent D and sodium sulfide"

还原剂名称 染液中还
原性硫
质量分
数/%		 废液 废气中
硫化氢质
量浓度/
(mg·m-3)
COD值/
(mg·L-1)		 硫质量
浓度/
(mg·L-1)
复合还原剂D 9.0 4 360 13.6 0.116
硫化碱 41.0 18 500 53.3 0.414
降低百分率/% 78.0 76.4 74.5 72.0

Anti-friction and soap fastness after dyeing with composite reducing agent D and alkali sulfide dye solution 级"

还原剂名称 耐摩擦色牢度 耐皂洗色牢度
干摩擦 湿摩擦 变色 沾色
醋纤 棉 锦纶 聚酯纤维 羊毛 腈纶
复合还原剂D 4 2 4~5 4~5 4~5 4~5 4~5 4~5 4~5
硫化碱 3 1~2 4~5 4~5 4 4~5 4~5 4~5 4~5
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