There are some obvious disadvantages and limitations in the tungsten acid method for the production of ammonium metatungstate. The following is a detailed summary of these disadvantages:
Complex process
The production of ammonium metatungstate by the tungsten acid method involves multiple steps, such as dissolution, reaction, pH adjustment, concentration, cooling, filtration, drying, etc. These steps are complicated to operate and require precise control of various parameters, such as temperature, pH value, stirring speed, etc., which increases the difficulty and complexity of production.
High production cost
Due to the complex process, a large amount of energy and raw materials are consumed, which increases the production cost. At the same time, the requirements for equipment are also high, and more funds need to be invested in the purchase and maintenance of equipment.
Low production capacity
The production capacity of ammonium metatungstate produced by the traditional tungsten acid method is relatively low, which is difficult to meet the needs of large-scale production. This is mainly due to the limitation of the process, which makes it impossible to effectively improve the production efficiency.
Product quality and purity issues
Although ammonium metatungstate can be produced by the tungsten acid method, impurities and pollutants may be introduced during the production process, affecting the quality and purity of the product. This requires strict control and subsequent treatment to improve product quality and purity.
Environmental pollution
The process of producing ammonium metatungstate by tungstic acid method may produce pollutants such as wastewater, waste gas and solid waste, which will cause certain pollution to the environment. These pollutants need to be properly handled to reduce the negative impact on the environment.
Safety issues
During the production process, hazardous chemicals such as ammonia water need to be used, which may cause safety risks such as flammability, explosion and toxicity. This requires operators to strictly abide by safety regulations and operating procedures to ensure production safety.
Low recovery rate
Some processes for producing ammonium metatungstate by tungstic acid method have the problem of low recovery rate. For example, although the continuous electrolysis process for producing ammonium metatungstate can achieve the production of ammonium metatungstate, the metal recovery rate is low, and the ion exchange resin needs to be regenerated with strong acid, which increases the production cost and environmental pollution.
In summary, the tungstic acid method for producing ammonium metatungstate by smelting ammonium metatungstate has shortcomings and limitations in terms of process complexity, production cost, production capacity, product quality and purity, environmental pollution and safety. In order to overcome these shortcomings, it is necessary to continuously optimize the production process, improve production efficiency, reduce production costs, improve product quality and purity, strengthen environmental protection measures and ensure production safety.
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