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荧光增白剂生产过程你知道吗?


网址:http://www.scvc8.com  时间:2018-12-17 11:32:50

荧光增白剂生产过程你知道吗?
Do you know the production process of fluorescent whitening agent?
荧光增白剂与染料一样,是印染厂都会用到的染化料之一,本文以增白剂VBL爲例,引见一下荧光增白剂是如何消费出来的。
Fluorescent whitening agent, like dyes, is one of the dyes used in printing and dyeing plants. This paper takes VBL as an example to show how fluorescent whitening agent is consumed.
一次缩合,在缩合釜中加水、碎冰开动搅拌,使釜内温度降至0℃以下,参加30%匀染剂O的水溶液和工业盐酸。中止搅拌,参加三聚氯氰,开动搅拌,打浆1小时,温度坚持在0℃。
For the first condensation, water and crushed ice were added to the condensation kettle to start stirring, which lowered the temperature of the kettle to below 0 C, and participated in 30% leveling agent O aqueous solution and industrial hydrochloric acid. Stop stirring, join in cyanuric chloride, start stirring, beating for 1 hour, the temperature is at 0 C.
将DSD酸中和溶液(PH=7.5),用活性炭脱色(活性炭用量爲DSD酸干品的10%,脱色温度爲90-95%),然后依据DSD酸含量的剖析,将DSD酸的溶液浓缩,于2.5小时内平均加至缩合釜中。参加一定量后,同时参加10%的碳酸钠溶液停止中和,温度控制在0-3℃,PH控制在5-6。待全部DSD酸加完后,搅拌45min。在15min内再参加10%碳酸钠溶液中和至PH=6-7。加完后,测氨值,如氨值已消逝,则抵达一次缩合反响起点。
The DSD acid neutralizing solution (PH=7.5) was decolorized with activated carbon (10% of DSD acid dried product and decolorizing temperature was 90-95%). Then, according to the analysis of DSD acid content, the solution of DSD acid was concentrated and added to the condensation kettle within 2.5 hours on average. After a certain amount of sodium carbonate solution was added, 10% sodium carbonate solution was stopped neutralizing, the temperature was controlled at 0-3 C, and the PH was controlled at 5-6. After adding all DSD acid, stir for 45 minutes. In 15 minutes, 10% sodium carbonate solution was added and neutralized to PH=6-7. After the addition, the ammonia value measured, if the ammonia value has disappeared, will reach the starting point of the first condensation reaction.
荧光增白剂厂家
第二次缩合,一次缩合反响抵达起点后,将物料放入二次缩合釜中,于0.5小时内平均地参加苯胺。加完后,慢慢升温,温度到达12℃时开端用10%的碳酸钠溶液中和,升温至30℃,PH控制在6-7。测氨值,如氨基值消逝即爲第二次缩合反响起点。
The second condensation, after the first reaction reached the starting point, the material was put into the second condensation kettle, and the aniline was averagely participated in within 0.5 hours. After adding, the temperature is gradually raised. When the temperature reaches 12 C, it begins to be neutralized with 10% sodium carbonate solution. The temperature is raised to 30 C, and the PH is controlled at 6-7. Measuring ammonia value, such as the disappearance of amino value, is the starting point of the second condensation reaction.
第三次缩合,将第二次缩合物转入带夹套的搪瓷反响釜中,一次参加乙醇胺,升温到80-85℃,参加氨水。加完后,密闭反响釜,持续升温至104-108℃,保温3小时。冷却至55-60℃,加水,静置沉淀3小时。
For the third condensation, the second condensation was transferred into an enamel reactor with a jacket. The second condensation was added to ethanolamine once, and the temperature was raised to 80-85 C, and ammonia water was added. After adding, the reactor is sealed and kept warm for 3 hours until 104-108 C. Cool to 55-60 C, add water, and settle for 3 hours.
第四后处置,反响液廓清后,过滤。滤液转入酸洗釜内,升温至90℃,开动搅拌,持续升温至95-98℃,逐步参加工业盐酸析至PH1-1.5,中止搅拌,静置沉淀2小时左右。酸析液廓清后,放去下层廓清液,上层酸析物放至吸滤桶中停止吸滤。吸干后,用冷水洗濯滤饼至PH=5,再吸干,将滤饼送至捏合机中,参加适当的纯碱,然后捏分解团,分出水分,停止枯燥、磨粉、规范化,即得荧光增白剂VBL。
Fourth, after disposal, the reaction fluid is cleared and filtered. The filtrate is transferred into the pickling kettle, heated to 90 (?) C, stirred and heated continuously to 95 - 98 (?) C. It gradually participates in the precipitation of industrial hydrochloric acid to PH1 - 1.5, stops stirring and settles for about 2 hours. After the acidification liquid is cleared, the lower layer of the acidification liquid is removed, and the upper layer of the acidification liquid is put into the suction and filter barrel to stop the suction and filtration. After drying, wash the filter cake with cold water to PH=5, then dry, send the filter cake to kneader, participate in appropriate soda ash, and then knead the decomposition group, divide the water, stop drying, grinding, standardization, that is, fluorescent whitening agent VBL.
综上所述有山东吉凌化工178彩票注册提供,想了解更多荧光增白剂厂家知识,欢迎关注我们的网站:http://www.scvc8.com谢谢支持!
In summary, all the above-mentioned Shandong Jiling Chemical Co., Ltd. provide, want to know more about fluorescent whitening agent manufacturers, welcome to pay attention to our website: http://www.scvc8.com Thank you for your support!

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