Background and overview[1][2]
Phenylpentanol, also known as 1-phenyl-1-pentanol, is an alcohol compound and is widely used in pharmaceutical and other industries.
Preparation[1]
The production of phenylpentanol still generally adopts the batch production process, while the extraction method usually uses crystallization and recrystallization. Among them, the crystallization process is the key to product yield and quality. Controlling the temperature of the crystallization process, crystallization particles, color and finished product quality are ensured. The crystallization process is divided into four steps: heating, reflux, cooling and filtration.
The crystallization temperature is controlled by using steam heating or frozen brine cooling through a heat exchanger to adjust the temperature of the heat exchange medium, and then the heat exchange medium flows through the jacket of the crystallization kettle to control the temperature of the materials in the crystallization kettle through heat exchange. Temperature, a stirrer is installed in the kettle, which is used to stir the material liquid to improve the efficiency of heat exchange, speed up the crystallization speed, shorten the production cycle, and increase the output of phenylpentanol. Since the crystallization process requires that the temperature of the material in the crystallization kettle changes strictly in accordance with the laws of the crystallization process, the heat exchange medium of the crystallization kettle jacket also needs a preheating process. This preheating process must be synchronized with the temperature changes of the materials in the crystallization kettle. In view of the crystallization process requirements in the production process of phenylpentanol, the random control logic algorithm designed by Mao Liqiang solves the problem of hysteresis in crystallization temperature control, and can obtain phenylpentanol products with good color and low impurity content, which improves the quality and efficiency of crystallization extraction. . The specific control algorithm is shown in Figure 4:
Apply[2-3]
1. CN200910031417.3 provides an edge glue cleaning agent used in the color filter manufacturing process. The formula is: water-soluble organic amine compound 1~60wt%, benzene aromatic alcohol organic solvent 1~60wt%, water 3~80wt%; wherein, the water-soluble organic amine compound is ethanolamine, triethanolamine, diethanolamine, or a mixture of two or three of them; benzene aromatic alcohol organic solvent is one of the following substances, benzyl alcohol , phenylethanol, phenylpropanol, phenylbutanol, phenylpentyl alcohol, phenylhexanol or derivatives of these six substances; water is pure water with a resistance higher than or equal to 18MΩ. The edge glue cleaning agent compounded by the present invention can easily remove excess color photoresist on the edge and back of the glass substrate at normal temperature and in a short time. Its production and use are very safe and environmentally friendly, and it has broad application prospects. .
2. CN200810200574.8 aims at the existing thick film photoresist cleaning agents that have insufficient cleaning capabilities or are highly corrosive to semiconductor wafer patterns and substrates, and provide a thick film photoresist cleaning agent. A photoresist cleaning agent that is highly capable and less corrosive to semiconductor wafer patterns and substrates. The technical solution adopted by the present invention to solve the above technical problems is: a cleaning agent for thick film photoresist, the cleaning agent contains dimethyl sulfoxide, potassium hydroxide, alcoholamine, aryl alcohol, polyacrylic acid Corrosion inhibitors and shrinking agents.
The aryl alcohol is preferably selected from the group consisting of benzyl alcohol, phenylethanol, benzyl alcohol, anthranilic alcohol, p-aminobenzyl alcohol, methylbenzyl alcohol, dimethylbenzyl alcohol, and trimethylbenzene One or more of methanol, ophthalenedimethanol, isophthalenedimethanol, terephthalenedimethanol, methylphenylethyl alcohol, p-aminophenylethyl alcohol, phenylpropanol, phenylbutanol, phenylpentyl alcohol and phenylhexanol, and more Preferred ones are one or more selected from the group consisting of benzyl alcohol, phenethyl alcohol, o-phthalyl alcohol and methyl phenylethyl alcohol. The content of the aryl alcohol is preferably 1 to 50% by mass, and more preferably 5.0 to 30.0% by mass. The aryl alcohol can significantly increase the solubility of potassium hydroxide in dimethyl sulfoxide.
Main reference materials
[1] Mao Liqiang. Design of crystallization process control scheme in the production process of phenylpentanol [J]. Chemical Industry Management, 2016(20):229-230.
[2] CN200910031417.3 Edge glue cleaning agent used in color filter manufacturing process
[3] CN200810200574.8 A cleaning agent for thick film photoresist
