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Acrylic acid is mainly used in China to produce acrylates, accounting for about 80% of total acrylic acid consumption. Therefore, the growth of acrylic acid was mainly due to the rapid development of infrastructure construction such as construction and transportation, and increased the demand for acrylic latex architectural coatings, sealants and other acrylate products.
As of March 2005, China's acrylic acid production capacity was 375,000 tons/year (including 33,500 tons/year high-purity acrylic acid), and actual production in 2004 was 170,000 tons; China's 2004 acrylate production capacity At 230,000 tons, net imports of acrylic acid and salts and acrylates were 112,000 tons and 211,000 tons, respectively, an increase of 250% and 35.5% respectively over 2000. Experts predict that as China's economy develops, the demand for acrylic acid and esters will increase further.
The construction industry will continue to be the major consumer of acrylic acid and esters in China. The development and application prospects of acrylic acid and esters in architectural coatings and adhesives are very good. Among them, 2-ethylhexyl acrylate is mainly used for producing adhesives, and polyethyl acrylate is mainly used for producing coatings. Acrylic construction emulsion products are used as interior and exterior wall coatings due to their excellent performance and environmental friendliness, and are favored by customers. It is estimated that in 2010, the demand for architectural coatings in China will reach 2.8 million tons, and the total consumption of general-purpose acrylates will be 300,000 tons.
In the chemical fiber textile industry, it is estimated that by 2010 China's textile and garment export volume will reach US$120 billion, accounting for about 30% of the world's total textile exports. The demand for acrylic high-grade textile pulp, paint printing paste and processing adhesives will increase substantially. increase.
With the continuous improvement of the living standards of residents and the increasing demand for sanitary materials, the demand for baby diapers, women's sanitary napkins and adult hygiene products has rapidly increased. It is estimated that the average annual growth rate of the above-mentioned sanitary products will be 10% to 15%. By 2010, the demand for high water absorbent resin (SAP) will reach 60,000 to 80,000 tons, which will greatly stimulate the consumption of acrylic acid and esters.
The state restricts or prohibits the use of phosphate builders, and the detergent industry promotes the absence of phosphates, which will greatly promote the development of sodium polyacrylates. At present, the annual consumption of polyacrylate sodium salt builders in China is only 4,000 to 5,000 tons. If the national detergents do not have phosphates, the amount of polyacrylate sodium salt can reach 30,000 tons per year based on the added amount of 1%. Great potential.
In the automotive industry, acrylate rubbers have properties such as heat resistance, aging resistance, oil resistance, ozone resistance, and UV resistance. They are widely used in various high temperature and oil resistant environments, especially for automotive crankshafts, valve stems, cylinder head gaskets, and hydraulic oil pipelines. Wait. In the past, the traditional automobile parts made of nitrile rubber and neoprene could not meet the requirements of modern automobiles and will be gradually replaced by high-performance acrylic rubber. It is estimated that in 2005, the demand for acrylic rubber in the domestic auto industry will reach 8,000 tons, and in 2010 it will reach 13,000 tons.
In summary, it is expected that in 2010 China's demand for acrylic acid and esters will reach 1.16 million tons, and consumption will account for approximately 31.4% of the world's total consumption.
Due to the optimistic view of the Chinese market, domestic and foreign companies have invested in the construction of new acrylic and ester devices or the expansion of existing devices. It is expected that in 2010, China's acrylic acid production capacity will reach 630,000 tons, and the acrylate production capacity will reach 750,000 tons, but there is still a certain gap compared to the demand.
At present, acrylic acid production in China mainly adopts imported technology. To enhance the competitiveness of the acrylic industry in the international market, experts recommend that the research and development of propylene oxidation technology should be strengthened, and catalysts and processes should be continuously improved during the use of new intellectual property devices and operations. Technology; promote the integrated development of refineries and petrochemical plants to ensure raw material supply advantages; expand application areas and seek common development with downstream products.
Leavening agent refers to food processing added to the main raw material for the production of baked goods wheat flour, and in the process of processing by heat decomposition, the production of gas, so that the dough blanks, the formation of dense porous tissue, so that the product has a bulky, soft or crisp class of substances. It is usually used in the production process of baked goods based on wheat flour such as pastries, biscuits, bread, and steamed buns, so that its volume is expanded and the structure is loose.
The principle of different leavening agents is consistent, that is, a large amount of carbon dioxide gas is produced in the dough through the starter culture, and during the cooking process, the carbon dioxide is heated and expanded, so the dough becomes soft and forms a loose structure. Leavening agents can not only make food produce soft spongy porous tissues, making them bulky, soft and delicious; Moreover, saliva can quickly penetrate into the tissue of the product when chewing, so as to dissolve the soluble substances in the product, stimulate the taste nerve, and make it quickly reflect the flavor of the food; After food enters the stomach, various digestive enzymes can quickly enter the food tissue, so that the food is easily and quickly digested and absorbed, avoiding nutrient loss.
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