Method for quantitatively adding stannous chloride in 4,6-diamido-hydrochloride

• Main Authors: WANG PEILAN, ZHANG RONGRONG, GUAN QINGBAO, GU WEIJING, ZHANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2017
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention relates to the field of organic chemistry, and introduces a method for quantitatively adding stannous chloride in 4,6-diamido-hydrochloride (DAR for short). By controlling the crystallization condition so as to control the particle size of the DAR, after filtration, the moisture content of DAR damp products with the similar particle sizes is kept within a certain range. By adding a certain amount of stannous chloride in recrystallization mother liquor, the stannous chloride content range in the DAR finished products can be controlled after drying. By means of processing of the method, on one hand, the storage life of the DAR can be prolonged and purity of the DAR finished products can be ensured, and on the other hand, by means of the crystal particle size, it can be ensured that the DAR hydrochloride meets the requirement for fiber polymerization of poly(p-phenylenebenzobisoxazole) (PBO for short). 本发明涉及有机化学领域，介绍种向4,6-二氨基间苯二酚盐酸盐（简称DAR）中定量加入氯化亚锡的方法，通过控制结晶条件控制DAR粒度大小，对于粒度相近的DAR潮品，过滤后其含湿量维持在定的范围。通