Mass preparation of reagent hydrochloric acid by pollution-free method
A large-scale, reagent hydrochloric acid technology, applied in chlorine/hydrogen chloride purification, chlorine/hydrogen chloride, etc., to save cooling devices and save energy
Active Publication Date: 2013-02-13
四川西陇科学有限公司
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Problems solved by technology
The classic reagent hydrochloric acid uses industrial hydrochloric acid as the raw material. The main component of the raw material is HCl greater than 31%. The content of reagent hydrochloric acid is required to be 36-38%. It will produce 0.6-0.8 tons of dilute hydrochloric acid with a content of 20% HCl. When the production of reagent hydrochloric acid is not large, the treatment of dilute acid is not very difficult, but with the expansion of production, the treatment of dilute acid has become a serious burden on production , so it is necessary to develop a reagent hydrochloric acid production method that reduces or eliminates dilute acid production
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[0028] The present invention will be further described below in combination with specific embodiments and accompanying drawings.
[0029] Preparation of reagent hydrochloric acid in large quantities by the pollution-free method is characterized in that it comprises the following steps:
[0030] A. Dilute (HCl ≥ 36.5%) industrial hydrochloric acid with dilute acid (HCl: 20-22%) or pure water to a concentration of HCl: 33-34%, and then treat the acid with resin and activated carbon adsorption;
[0031] B. Use an acid-resistant pump to pump the treated hydrochloric acid into the spare tank in the workshop. Before pumping the acid, add 300g of stannous chloride, and the amount of acid pumped is 2000kg each time;
[0032] C. Open the feed pump and feed valve until the side pipe of the evaporator discharges the material;
[0033] D. Turn on the cooling water circulation pump and check whether the cooling water pressure gauge is above 0.2Mpa;
[0034] E. Open the steam valve and ad...
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The invention relates to a mass preparation method of reagent hydrochloric acid, and particularly relates to mass preparation of reagent hydrochloric acid by a pollution-free method. The mass preparation of reagent hydrochloric acid by a pollution-free method is characterized in that the method comprises the following steps: diluting industrial hydrochloric acid (HCl>=36.5%), performing resin processing, and active carbon adsorption processing, adding stannous chloride, starting distillation, and collecting fractions. The invention adopts graphite distillation; the daily output per set of production devices is up to several tons or even tens of tons; the pollution source control is easy, and the generation of dilute acid is eliminated.
Description
[0001] technical field [0002] The invention relates to a method for producing reagent hydrochloric acid in large quantities, in particular to a method for producing reagent hydrochloric acid in large quantities without pollution. [0003] Background technique [0004] The early reagents were limited to analytical and experimental reagents, which are characterized by many varieties and small batches. Often, laboratory glass devices can meet the needs. The daily output of each device is several liters to tens of liters. The production of most reagents hydrochloric acid It is only to increase the number of sets on the basis of the experimental device to meet the user's quantity requirements. With the rise of food, pharmaceutical, electronics and other industries, the demand for reagent hydrochloric acid is also increasing. Often, the daily demand of only one enterprise reaches hundreds of liters. Reagents have become the main raw materials for production. The original reagen...
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Inventor 肖启发肖克强黄侦杰梁永贵
Owner 四川西陇科学有限公司