How is the ammonia solution sold by ammonia plants manufactured? Is it just adding liquid ammonia to the water?

Found a document on the production methods and process flow for the chemical raw material ammonia water: https://bbs.hcbbs.com/thread-2855353-1-1.html (Source: Haichuan Chemical Industry Forum)

Production process flow for ammonia preparation 1. Bubble absorption: Taking advantage of the fact that ammonia is highly soluble in water, this method is generally used to reduce investment costs. Water is placed in a tank, and liquid ammonia is introduced from below for bubble absorption; the heat generated is not removed. Once saturation is achieved, the NH3 concentration at normal pressure is 5-6%. This method can only be used for tail gas recovery.   2. Bubble column absorption: This method involves absorption in a pressurized (0.2–0.5 MPa) bubble column and is primarily used for the recovery of NH3 from synthesis off-gases (containing about 12% NH3) and storage tank gases (containing about 60% NH3). The concentration of ammonia obtained through this process is generally around 5%. This technique requires high capital investment, and liquid flooding can occur easily during operation; it is mainly used in ammonia plants for the recovery of NH3 present in concentrations of 12–60%.   3. Direct absorption of liquid ammonia to produce ammonia water: Ammonia water is produced by bringing liquid ammonia into direct contact with water. This process is commonly used in fertilizer plants when no ammonia-based products are being manufactured. Due to the large latent heat of vaporization of liquid ammonia, it is necessary to remove the latent heat generated during the reaction between water and liquid ammonia as quickly as possible (using, for example, spray-type water coolers). This can lead to liquid slugging in the equipment and pipelines; in severe cases, this may cause damage to gasket materials and welds, and even accidents such as the rupture of the top portion of the ammonia water tank. However, provided that the operation is carried out correctly and the heat of reaction is removed promptly, this method remains one of the processes used in fertilizer plants for large-scale production of ammonia water.

Absorption using an ammonia production unit or a circulating absorption process with a high-position ammonia absorber.

There are specialized equipment for producing ammonia water