Qualification standards for industrial salt
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Hello everyone. Throttle Company is planning to launch a new project in which a large amount of sodium chloride is generated during the production process. This salt can be separated using centrifuges and similar devices. Tests have shown that the concentration of organic substances in the saturated aqueous solution of this salt is around 1,000 ppm. Given the strict environmental regulations in place today, there are few manufacturers capable of dealing with this type of salt. For now, we plan to reduce the organic substance content through methods such as ion adsorption, and then sell the resulting salt as industrial salt. However, the current standards for industrial salt do not cover organic substances; it’s unclear whether this approach is feasible. Moreover, it’s not known whether discharging it directly will meet the standards!
This post was last edited by Du Xiaoping on 2016-8-29 at 16:33. Quality standards for industrial salt: GB/T5462-2003. Parameters: Grade A, Grade 1, Grade 2. Sodium chloride%, ≥ 99.1, 98.5, 97.5; Moisture%, ≤ 0.3, 0.5, 0.8; Water-insoluble substances%, ≤ 0.05, 0.1, 0.2; Calcium and magnesium ions%, ≤ 0.25, 0.4, 0.6; Sulfate ions%, ≤ 0.3, 0.5, 0.9. As can be seen from these standards, there is no specified limit for the content of organic substances. However, companies that use industrial salt may have requirements regarding organic substances, some of which are quite strict. So you reduce the organic content through methods such as ion adsorption, and then sell it as industrial salt. This method is correct. You said whether it meets the standards if discharged directly! ------For this issue, it depends on the local **environmental protection requirements; generally, it is determined based on the test data for the COD indicator.
Salt now requires subsidies; if it is processed to be white and tasteless, it can have a price
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Organic substances in salts are considered hazardous waste… We have carried out sodium sulfate recovery, which is similar to what you’re doing
What type of centrifuge did the original poster use for separation?
To determine the types of organic substances present in the salt and remove them selectively is necessary, as there are many different types of such substances; if they enter the electrolytic cell directly, it will have an impact on both the membrane and the electrodes.
This post was last edited by Jason.Keng on 2017-4-17 20:04