A kind of continuous oxygen bleaching refining agent and preparation method thereof
A technology of surfactant and rare earth catalyst, which is applied in the fields of plant fiber, fiber treatment, textiles and papermaking, etc., can solve the problems of large amount of refining agent and NaOH, unsatisfactory removal effect of cottonseed hulls, high COD value of discharged wastewater, etc., to achieve reduction The amount of NaOH, the strong damage is small, and the effect of reducing the COD value
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[0024] In a more preferred embodiment, the preparation method of continuous oxygen bleaching refining agent of the present invention comprises the following steps:
[0025] 1) 5-10wt% hydrogen peroxide stabilizer, 2-5wt% biodegradable surfactant, 18-25wt% Jimmy surfactant, 2-4wt% hyperbranched surfactant and 50-70wt% deionized water Add to the reaction kettle, stir at 40-60°C for 10-20 minutes;
[0026] 2) Add 2-8wt% rare earth catalyst to the mixture formed in step 1), raise the temperature to 50-70°C, and continue stirring for 1-2 hours;
[0027] 3) cooling to room temperature to obtain the continuous oxygen bleaching refining agent.
[0028] The continuous oxygen bleaching refining agent prepared by the invention is highly efficient and environmentally friendly, and the process has wide applicability. The amount of NaOH is reduced by about 40% compared with conventional refining agents, and the COD value of discharged wastewater is reduced by more than 40%. The whiteness, ...
Embodiment 1
[0046]Add lignosulfonate (Wuhan Fengzhulin Chemical Technology Co., Ltd., weight-average molecular weight 2900) 2.1 grams, polycarboxylic acid (Hubei Xinkang Pharmaceutical Chemical Co., Ltd., weight-average molecular weight 3150) 2.0 grams, polyhydroxyacrylic acid in the four-necked flask Sodium (Jinjinle (Hunan) Chemical Co., Ltd., weight average molecular weight 3100) 2.3 grams, Sapindus saponin (Hunan Langlin Biological Products Co., Ltd.) 2.8 grams, N,N'-dilauroyl ethylenediamine diethylsulfonic acid Sodium 21g, AAS-HBP 2g and deionized water 65g, stir at 45°C for 15 minutes, add Tb 0.5 Eu 0.5 (TTA) 3 4.3 grams of Phen, heated up to 55°C, continued to stir for 1.5 hours, and cooled to room temperature to obtain the continuous oxygen bleaching refining agent 1, with a solid content of 36.2%.
Embodiment 2
[0048] Add lignosulfonate (Wuhan Fengzhulin Chemical Technology Co., Ltd., weight-average molecular weight 4200) 2.0 grams, polycarboxylic acid (Hubei Xinkang Pharmaceutical Chemical Co., Ltd., weight-average molecular weight 3950) 1.9 grams, polyhydroxyacrylic acid in the four-necked flask Sodium (Jinjinle (Hunan) Chemical Co., Ltd., weight average molecular weight 4100) 2.2 grams, the average degree of polymerization is 1.2 C 12 Starch glucoside (purchased from Lanzhou University of Technology) 3 grams, N,N'-difatty acyl ethylenediamine dipropionate 22 grams, (formula I), SHBP 2.3 grams and deionized water 63 grams, stirred at 40 ° C for 15 min, add Pr 2 (BA) 6 (Phen) 2 4.8 grams, heated up to 55°C, continued to stir for 1.5 hours, and cooled to room temperature to obtain the continuous oxygen bleaching refining agent 2, with a solid content of 35.7%.
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