申请人:Hoechst Aktiengesellschaft
公开号:US04588814A1
公开(公告)日:1986-05-13
Preparation of 3,4,9,10-perylenetetracarboxylic acid diimide by fusing naphthalene-1,8-dicarboxylic acid imide with potassium hydroxide and sodium acetate to give the alkali metal salt of the leuko compound of 3,4,9,10-perylenetetracarboxylic acid diimide, diluting the melt with water when the reaction has ended and oxidizing the leuko form to give the 3,4,9,10-perylenetetracarboxylic acid diimide, by a procedure which comprises (a) applying a vacuum of less than 100 mm Hg before the naphthalene-1,8-dicarboxylic acid imide is introduced into the potassium hydroxide/sodium acetate melt, heating the potassium hydroxide/sodium acetate mixture to 200.degree.-300.degree. C. and dehydrating it such that the melt is still stirrable at 200.degree.-220.degree. C., and then introducing the naphthalene-1,8-dicarboxylic acid imide or its sodium or potassium salt into the melt at 200.degree.-220.degree. C. under normal pressure and heating the mixture at 250.degree.-300.degree. C. in the absence of atmospheric oxygen, or (b) applying a vacuum of less than 100 mm Hg after the naphthalene-1,8-dicarboxylic acid imide or its sodium or potassium salt has been introduced into the potassium hydroxide/sodium acetate melt at 200.degree.-220.degree. C. under normal pressure, heating the mixture to 200.degree.-250.degree. C. and dehydrating it such that the melt is still stirrable at 200.degree.-220.degree. C., and then heating the melt at 250.degree.-300.degree. C. in the absence of atmospheric oxygen, or (c) introducing the sodium or potassium salt of naphthalene-1,8-dicarboxylic acid imide into the potassium hydroxide/sodium acetate melt at 200.degree.-220.degree. C. under normal pressure and heating the melt at 250.degree.-300.degree. C. in the absence of atmospheric oxygen.
通过将萘-1,8-二羧酸亚胺与氢氧化钾和乙酸钠熔融,生成3,4,9,10-苝四羧酸二酰亚胺的白色化合物的碱金属盐,当反应结束时用水稀释熔融物,并通过将白色化合物氧化为3,4,9,10-苝四羧酸二酰亚胺来制备。该过程包括:(a)在将萘-1,8-二羧酸亚胺引入氢氧化钾/乙酸钠熔融物之前施加小于100毫米汞柱的真空,在200℃至300℃下加热氢氧化钾/乙酸钠混合物并脱水,使熔融物在200℃至220℃下仍可搅拌,然后在200℃至220℃下将萘-1,8-二羧酸亚胺或其钠或钾盐引入熔融物中,在无大气氧气的情况下在250℃至300℃下加热混合物,或(b)在将萘-1,8-二羧酸亚胺或其钠或钾盐引入200℃至220℃的氢氧化钾/乙酸钠熔融物中后施加小于100毫米汞柱的真空,在200℃至250℃下加热混合物并脱水,使熔融物在200℃至220℃下仍可搅拌,然后在无大气氧气的情况下在250℃至300℃下加热熔融物,或(c)在200℃至220℃下将萘-1,8-二羧酸亚胺的钠或钾盐引入氢氧化钾/乙酸钠熔融物中,在无大气氧气的情况下在250℃至300℃下加热熔融物。