Preparation method of environment-friendly disperse violet 26

• Main Authors: YAN BO, JI SHULIANG, SHENG BAOAN, ZANG JUNJIAO
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• Subjects: ADHESIVES; CHEMISTRY; DYES; LAKES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; POLISHES

The invention discloses a preparation method of environment-friendly disperse violet 26. The preparation method specifically comprises the steps of condensation, vacuum dephenolization, segregation, filtration, oxidation, acidification, wastewater treatment and the like, sodium salt and potassium salt in the reaction are fully separated, and the product yield is increased; the recycling of sylvite in the wastewater is realized for the first time, and the discharge of salt-containing wastewater is reduced; and the key raw material phenol is recycled, so that the production cost is greatly reduced. The preparation process is environment-friendly and efficient, ensures the yield and purity of the product, and is more beneficial to industrial production of the disperse violet 26. 本发明公开了一种环保型分散紫26的制备方法，具体包括缩合、真空脱酚、离析、过滤、氧化、酸析、废水处理等步骤，该方法将反应中的钠盐、钾盐充分分离，提高了产品收率；且首次实现了废水中钾盐的回收利用，减少了含盐废水的排放；以及关键原料苯酚的回收套用，大大降低了生产成本。该制备工艺环保高效，保证了产品的收率和纯度，更有利于分散紫26的工业化生产。