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Salt refining, a large-scale salt industry developed in coastal locations and based on a combination of inland salt mining and coastal salt production. Referred to as salt refining or salt-on-salt, the process combined weak brine from seawater with mined rock salt, and evaporated the brine into a white salt.
The ancient Chinese gradually mastered and advanced the techniques of producing salt. Salt mining was an arduous task for them, as they faced geographical and technological constraints. Salt was extracted mainly from the sea, and salt works in the coastal areas in late imperial China equated to more than 80 percent of national production. [5]
This results in a three-dimensional pyramid-shaped flake salt, which has low bulk density, high solubility, and good adhesion. [2] According to a scientific article from 1946, the process results in salt of high purity but "is the least economical method for the production of a given quantity of salt." [3]
The open-pan salt making method was used along the Lincolnshire coast and in the salt marshes of Bitterne Manor on the banks of the River Itchen in Hampshire, where salt production was a notable industry. [22] Wich and wych are names associated (but not exclusively) with brine springs or wells in England. Originally derived from the Latin vicus ...
Evidence indicates that Neolithic people of the Precucuteni Culture were boiling the salt-laden spring water through the process of briquetage to extract salt as far back as 6050 BC. [12] The salt extracted from this operation may have directly correlated with the rapid growth of this society's population soon after production began. [ 13 ]
The Solvay process or ammonia–soda process is the major industrial process for the production of sodium carbonate (soda ash, Na 2 CO 3). The ammonia–soda process was developed into its modern form by the Belgian chemist Ernest Solvay during the 1860s. [ 1 ]
Sea salt is salt that is produced by the evaporation of seawater. It is used as a seasoning in foods, cooking, cosmetics and for preserving food. It is also called bay salt, [1] solar salt, [2] or simply salt. Like mined rock salt, production of sea salt has been dated to prehistoric times.
Today, salt from groundwater brines is generally a byproduct of the process of extracting other dissolved substances from brines and constitutes only a small part of world salt production. In the United States, salt is recovered from surface brine at the Great Salt Lake, Utah, and from a shallow subsurface brine at Searles Lake, California.