What does 3 nitrogen azole production method have?

2019-06-26 13:43

1. A 5-triazole production process is characterized in that it includes the following steps:


In the reaction kettle, put 3, 4-diaminotoluene into 0.8 ~ 1.5 times pure water, heat and keep 95 ~ 105℃, stir until fully dissolved;


0.4 ~ 0.7 times of 3, 4-diaminotoluene sodium nitrite was added to the solution prepared in Step 1. The reaction pressure was maintained at 5.6 ~ 5.8MPa, the temperature was maintained at 250 ~ 280℃, and the reaction was stirred for 2.5 ~ 3.5 hours.


The solution obtained in Step 2 was cooled to 180 ~ 200℃ and reduced to 0.7 ~ 0.8mpa.


Sulfuric acid is dropped into the solution prepared in step 3 to maintain a PH of 5-6, resulting in the formation of a large number of crystals.


The liquid crystal mixture obtained in Step 4 was dehydrated at a temperature of 20-30℃.


The crystals obtained in Step 5 were heated and dehydrated at 105 ~ 210℃.


The crystallization obtained in Step 6 was distilled at 220 ~ 240℃, reflux for 2.5 ~ 3.5 hours, and full stirring was performed to obtain triazole.


2. According to the production method stated in Claim 1, it is characterized by the following: pure water in Step 1 means distilled water or deionized water.


3. According to the production method mentioned in Claim 1, its characteristics are as follows: the reaction temperature in Step 2 is controlled by medium pressure coil circulating water.


4. According to the production method stated in Claim 1, it is characterized by the following: the concentration of sulfuric acid dropped in Step 3 is between 12% and 16%.