The production method of paraffin soap (731) is characterized by the following steps:
       Materials Preparation: A certain amount of raw material wax is poured into a preheated tank, where it is decontaminated, dehydrated, and heated to 120℃ for preservation. Catalyst potassium salt and manganese salt are added to the dissolution tank at a rate of 1.5-2‰ based on the feed amount, and soda ash at a rate of 0.3-0.8‰. After dissolving in water, they are set aside. Approximately 50% of the material is sodium hydroxide, which is then used to prepare a 25-30% concentration alkali solution for later use.
       2. Preparation of Oxidized Wax: The preheated material in the preheating tank is transferred into the oxidation tower, while supplying air at a rate of 40 cubic meters per ton per hour. Heat is applied, and a mixture of the prepared catalyst and sodium carbonate solution is injected into the tower. Once the material temperature inside the tower reaches 160±2°C, the reaction is initiated and maintained for 0.5 hours. The air supply rate is then increased to 50 cubic meters per ton per hour, and the temperature is reduced to 150±2°C to initiate the reaction. After two hours, the material temperature inside the tower drops to 120-130°C, starting the oxidation process. Simultaneously, the air supply rate is increased to 60 cubic meters per ton per hour, maintaining the temperature. After 12 hours of oxidation, the air supply rate is raised to 80 cubic meters per ton per hour, with the temperature remaining constant. After the excitation is complete, the acid value is tested. When the acid value of the material in the oxidation tower reaches 80-85 mgKOH/g, the oxidation process is finished. Following oxidation, heating is stopped and the material inside the tower is cooled to 120°C, while the air supply rate is reduced to 40 cubic meters per ton per hour. The material is then discharged from the tower and transferred to a saponification tank that contains 30-40% of its capacity filled with 75°C hot water. At the same time, the oil-soluble acids generated during the reaction are evenly introduced into the saponification tank.
       Saponification
       (1). Washing: Adjust the temperature of the oxidized wax in the saponification tank to around 85°C, and use steam or air to achieve a material tumbling state. When the temperature of the material in the saponification tank falls below 85°C, stir with direct steam. When the material temperature exceeds 85°C, switch to air stirring. Stir for at least 40 minutes. After stirring stops, maintain the temperature at 85-90°C for settling. After 30 minutes of settling, discharge the wastewater and the intermediate layer from the bottom of the saponification tank. Test the acidity of the oxidized wax after washing until the wastewater pH reaches a weak acidic level. If not up to standard, repeat the washing process.
       (2). Saponification: Qualified oxidized wax from the saponification tank is heated with steam to 95-100°C, and approximately 35% of the material volume of water is added. Under boiling conditions, the prepared alkali solution is added to the oxidized wax. The amount of alkali added is calculated as follows: per ton of oxidized wax = Acid Value × 1.8 × 0.71 × 1.03 (excess alkali) ÷ Concentration ÷ 1000. After sufficient alkali is added, saponification is carried out for one hour, followed by a further one-hour cycle. Once saponification is complete, the pH value is checked to be around 13; if not, additional alkali is added for further saponification.
       (3). Separation: After saponification, the material in the saponification tank is kept warm and settled for at least 3 hours. Then, the soap liquid is transferred to the soap liquid storage tank, and after a static period of more than 24 hours, it is transferred to the next process.
       4. Refining: Qualified soap liquid in the storage tank is pumped into a tubular furnace via a pressure pump. The feed rate and flame intensity are adjusted. When the moisture content of the material is around 30%, it is transferred to the refining tank, becoming semi-finished paraffin wax soap. After inspection, the free alkali content and moisture are adjusted to meet the standard requirements. The material in the refining tank, upon passing inspection, becomes finished product and is then transferred to the finished product tank for measurement and packaging.