Pigment yellow 180 preparation

Yellow 180 is a commonly used organic pigment with a gorgeous yellow color, widely used in paint, ink, plastics and other industries. The preparation process of pigment yellow 180 will be described in detail below:

The preparation steps are as follows:

Raw materials preparation: The raw materials for the preparation of pigment yellow 180 mainly include benzophenone, p-aminobenzoic acid and chloroacetic acid, which have high purity requirements. Solvents, such as ethanol and ether solvents, are also required.

Preparation of reaction system: Dissolve an appropriate amount of benzophenone, p-aminobenzoic acid and chloroacetic acid in ethanol and ether solvents in a certain proportion to prepare a reaction system.

Reaction condition control: the reaction system is placed in a constant temperature stirring device, and the control temperature is within the appropriate range, usually 60-80 degrees Celsius. To control the reaction time, generally 12-24 hours.

Reaction process control: During the reaction process, regular sampling should be taken to detect the reaction progress to ensure that the reaction goes smoothly. It can be analyzed by infrared spectrum, mass spectrometry and other methods.

Crystallization and washing: After the reaction, the reaction system is cooled to room temperature to crystallize a yellow solid, that is, pigment yellow 180. The impurities are then removed through a washing process to improve the purity of the pigment.

Drying and crushing: The washed pigment yellow 180 needs to be adequately dried to remove moisture. The pigment blocky object obtained after drying needs to be crushed to obtain the required particle size.

Packaging and storage: The prepared pigment yellow 180 is sealed and packaged to prevent it from being exposed to air for a long time and to avoid changes in the quality of the pigment. The storage environment should be dry and cool, avoid moisture and high temperature.

The preparation process of pigment yellow 180 is relatively complex, and the conditions of each link need to be precisely controlled to ensure the quality and stability of the product. In practical applications, further testing and evaluation are needed to meet the needs of different fields.

The preparation process of pigment yellow 180 not only has a certain technical difficulty, but also involves the use of some chemicals, so it is necessary to strengthen safety awareness and do a good job of personal protection during the operation. Waste disposal should also be carried out in strict accordance with relevant regulations to meet environmental protection requirements.

The preparation of pigment yellow 180 involves many processes such as raw material preparation, preparation of reaction system, control of reaction conditions, crystallization and washing, drying and crushing, packaging and storage. Only when each step is strictly controlled and operated, can high quality pigment Yellow 180 be prepared and used in many industries.