[0087] 2-Methoxy-4-nitroaniline was

[0087]通过使用2.5倍摩尔量的盐酸和等摩尔量的亚硝酸钠以本领域本身已知的方式将2-甲氧基-4-硝基苯胺重氮化以制备0.125摩尔/ L的重氮溶液（8 L，溶液温度：10℃。在侧面上，将乙酰乙酸-邻-茴香胺（209.3份）溶解在含有氢氧化钠（50份）的水溶液中，随后加入乙酸水溶液以沉积底物组分，使得0.0253摩尔。制备pH值为4.2的/ L接地溶液（40L，溶液温度：20℃）。<br><br>[0088]如图2所示，如图1所示，接着，由供给泵d使接地溶液以5L / min的流速作为第一流体I从第一供给槽2经由第一流路a向喷射器1流动。由于在喷射器1中发生了减压，因此重氮溶液以1L / min的流量（由第一流量控制装置e调节）作为第二流体II从第二进料罐3通过第二流路b被抽出。保持在20度 通过温度控制装置g，通过偶联反应，得到单偶氮颜料[CI颜料黄74（PY74）]。<br><br>[0089]由于在喷射器中与偶联反应同时发生的严重湍流的影响，单偶氮颜料的产率非常好。相对于重氮组分，接地组分的过量程度高达约1摩尔％。然而，偶联反应进行得顺利，并且偶联反应时间为约8分钟。将由此获得的所得颜料的水性悬浮液通过第三流路a'从喷射器1中排出，并存储在处理槽5中。将如此存储的颜料的水性悬浮液加热至90℃。C.，通过过滤收集颜料，用水洗涤，然后干燥以获得干燥形式的单偶氮颜料（PY74）。

[0087] 2-Methoxy-4-nitroaniline was diazotized in a manner known per se in the art by using a 2.5-fold molar amount of hydrochloric acid and an equimolar amount of sodium nitrite to prepare a 0.125 mole/L diazo solution (8 L, solution temperature: 10.degree. C.). On the side, acetoacet-o-anisidide (209.3 parts) was dissolved in an aqueous solution which contained sodium hydroxide (50 parts), followed by the addition of an aqueous solution of acetic acid to have a grounder component deposited so that a 0.0253 mole/L grounding solution of pH 4.2 (40 L, solution temperature: 20.degree. C.) was prepared.<br><br>[0088] As illustrated in FIG. 1, the grounding solution was next caused to flow as a first fluid I at a flow rate of 5 L/min by the feed pump d from the first feed tank 2 into the ejector 1 through the first flow path a. Owing to depressurization occurred in the ejector 1, the diazo solution was drawn as a second fluid II at a flow rate of 1 L/min (adjusted by the first flow control means e) from the second feed tank 3 through the second flow path b into the ejector 1 maintained at 20.degree. C. by the temperature control means g, and through a coupling reaction, a monoazo pigment [C.I. Pigment Yellow 74 (PY74)] was yielded.<br><br>[0089] The yield of the monoazo pigment was very good owing to the effects of a severe turbulence occurred concurrently with the coupling reaction in the ejector. The degree of an excess of the grounder component relative to the diazo component was as much as about 1 mole %. Nonetheless, the coupling reaction proceeded smoothly, and the coupling reaction time was about 8 min. The thus-obtained aqueous suspension of the resulting pigment was discharged from the ejector 1 through the third flow path a', and was stored in the treatment tank 5. After the thus-stored aqueous suspension of the pigment was heated to 90.degree. C., the pigment was collected by filtration, washed with water and then dried to obtain the monoazo pigment (PY74) in a dry form.

[0087]2-甲氧基-4-硝基苯胺以本领域已知的方式重氮化，使用2.5倍摩尔量的盐酸和等摩尔量的亚硝酸钠制备0.125摩尔/升重氮溶液（8L，溶液温度：10.degree）。C、 ）。另一方面，将乙酰乙酸-o-茴香醚（209.3份）溶解在含有氢氧化钠（50份）的水溶液中，然后添加乙酸水溶液以沉积研磨组分，使pH为4.2（40 L，溶液温度：20.0度）的0.0253摩尔/升接地溶液中。C、 ）准备好了。<br>[0088]如图1所示，接地溶液随后由进料泵d以5 L/min的流速从第一进料罐2通过第一流道a流入喷射器1。由于喷射器1中发生减压，重氮溶液以1 L/min的流速作为第二流体II被抽出（由第一流量控制装置e调整）从第二进料罐3通过第二流道b进入保持在20度的喷射器1。C、 通过温度控制手段，通过偶联反应，得到了单偶氮颜料[C.I.颜料黄74（PY74）]。<br>[0089]由于喷射器中耦合反应同时发生的剧烈湍流效应，单偶氮颜料的产率非常高。研磨剂组分相对于重氮组分的过量程度高达1摩尔%左右。尽管如此，偶合反应进行顺利，偶联反应时间约为8分钟。由此获得的所得颜料的水悬浮液通过第三流道a'从喷射器1排出，并储存在处理槽5中。在这样储存后，颜料的水悬浮液被加热到90度。C、 采用过滤法收集色素，用水洗涤，干燥，得到干燥的单偶氮颜料（PY74）。<br>