在没有工业生产方法之前，人们从天然碱湖中收集纯碱或用含碱植物灰制成纯碱，用于洗涤剂和玻璃、肥皂、皮革制造等。随着工业的发展，原有的纯碱提法已经不能满足对碱的需求，大规模的工业制碱工艺应运而生。目前，纯碱生产工艺主要分为合成纯碱工艺和天然碱工艺。合成纯碱工艺约占世界纯碱产能的三分之二，天然碱工艺约占三分之一。

Before there was no industrial production method, people collected soda from natural soda lakes or made soda from alkaline plant ash for detergent, glass, soap, leather manufacturing, etc. With the development of industry, the original soda extraction method can no longer meet the demand for alkali, and large-scale industrial soda making process came into being. At present, the production process of soda ash is mainly divided into synthetic soda ash process and natural soda process. The synthetic soda ash process accounts for about two-thirds of the world's soda ash production capacity, and the natural soda ash process accounts for about one-third.

纯碱按密度可分为轻纯碱（lightsoda）和重纯碱（heavysodaash）。用于家庭洗涤、化学溶剂和食品加工行业；重碱的密度为1000-1200kg/，呈白色细小颗粒，多用于平板玻璃的生产。与轻碱相比，重碱具有坚固、颗粒大、密度高、吸湿性低、不易结块、不易飞散、流动性好等特点。此外，还有超轻质纯碱和超重质纯碱，密度分别约为370kg/和1550-2553kg/。

Soda ash can be divided into lightsoda and heavysodaash according to density. Used in household washing, chemical solvents and food processing industries; The density of heavy alkali is 1000-1200kg/, which is white fine particles and is mostly used in the production of flat glass. Compared with light alkali, heavy alkali has the characteristics of firmness, large particles, high density, low hygroscopicity, not easy to agglomerate, not easy to fly away, and good fluidity. In addition, there are ultra light soda ash and ultra heavy soda ash, with densities of about 370kg/ and 1550-2553kg/ respectively.

按用途不同，纯碱可分为工业纯碱和食用纯碱。工业纯碱执行中华人民共和国颁布的标准GB/T210-2004《工业碳酸钠及其试验方法》（以下简称标准），包括GB/T210.1-2004《工业碳酸钠》及其试验方法第1号《工业碳酸钠部分》和GB/T210.2-2004《工业碳酸钠及其试验方法第2部分工业碳酸钠试验方法》。食用纯碱执行GB1886-1992《食品添加剂》碳酸钠”标准。在达到工业纯碱低盐标准的基础上，增加了砷和重金属的含量限值。

According to different uses, soda ash can be divided into industrial soda ash and edible soda ash. Industrial soda shall comply with the national standard gb/t210-2004 industrial sodium carbonate and its test methods (hereinafter referred to as the national standard) issued by the people's Republic of China, including gb/t210.1-2004 industrial sodium carbonate and its test methods No. 1 industrial sodium carbonate part and gb/t210.2-2004 industrial sodium carbonate and its test methods Part 2 industrial sodium carbonate test methods. Edible soda ash shall comply with the standard of gb1886-1992 food additives - sodium carbonate. On the basis of reaching the low salt standard of industrial soda ash, the content limits of arsenic and heavy metals are added.

根据氯化物含量的不同，纯碱可分为普通碱、低盐度、超低盐度和特低盐度。按标准，普通碱氯化钠的质量分数≤1.20%；低盐度氯化钠的质量分数≤0.90%；超低盐度氯化钠的质量分数≤0.70%；特低盐度氯化钠质量分数≤0.30%。

According to different chloride contents, soda ash can be divided into ordinary alkali, low salinity, ultra-low salinity and ultra-low salinity. According to the national standard, the mass fraction of common alkali sodium chloride is ≤ 1.20%; Mass fraction of low salinity sodium chloride ≤ 0.90%; Mass fraction of ultra-low salinity sodium chloride ≤ 0.70%; Ultra low salinity sodium chloride mass fraction ≤ 0.30%.

此外氢氧化钾厂家再来给大家讲讲纯碱用途主要包括：

In addition, the potassium hydroxide manufacturer will tell you about the main uses of soda ash:

（1）建材领域，纯碱作为平板玻璃的主要原料之一，为反应提供钠离子，同时也是澄清剂的主要成分；

(1) In the field of building materials, as one of the main raw materials of flat glass, soda ash provides sodium ions for reaction and is also the main component of clarifier;

（2）化工生产领域，纯碱广泛用于制造硅酸钠（俗称泡花碱、水玻璃）、碳酸氢钠（俗称小苏打）、氟化钠、重铬酸盐等产品；

(2) In the field of chemical production, soda ash is widely used to manufacture sodium silicate (commonly known as bubble soda, sodium silicate), sodium bicarbonate (commonly known as baking soda), sodium fluoride, dichromate and other products;

（3）印染冶金领域，纯碱充当纺织物生产过程的软水剂，或是用作冶炼的助溶剂、选矿的浮选剂以及炼钢的脱硫剂等；

(3) In the field of printing and dyeing metallurgy, soda ash is used as a water softener in the textile production process, or as an auxiliary solvent for smelting, a flotation agent for beneficiation and a desulfurizer for steelmaking;

（4）食品加工领域，纯碱作为面食添加剂起到中和剂、膨松剂、缓冲剂、面团改良剂作用，增加面食口感和柔韧度，也可作为主要辅助添加剂应用于味精、酱油的生产。

(4) In the field of food processing, as a pasta additive, soda ash acts as a neutralizer, bulking agent, buffer and dough improver to increase the taste and flexibility of pasta. It can also be used as a main auxiliary additive in the production of monosodium glutamate and soy sauce.

此外，纯碱也广泛地应用于脱硫、医药制品、制革、造纸等，高端纯碱还可用于显像管玻壳和光学玻璃制造。

In addition, soda ash is also widely used in environmental desulfurization, pharmaceutical products, tanning, papermaking, etc. high end soda ash can also be used in the manufacture of kinescope glass shell and optical glass.

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