According to the use of carbon steel can be divided into carbon structural steel, carbon tool steel and easy cutting structural steel three types, carbon structural steel is divided into engineering construction steel and machine manufacturing structural steel two; carbon steel plate,carbon steel sheet,carbon steel pipe,carbon steel tube,carbon steel coil Shandong Longhao Steel Group Co., Ltd. , https://www.longhaosteels.com
Overcapacity technology lags behind the experts pointed out that China's chloroacetic acid production capacity is increasingly oversupply, the operating rate of enterprises is at a relatively low level, but the construction speed is accelerating, some areas have built some new large and medium-sized production devices, the blind expansion of production capacity and the national macro There are contradictions between the controls. China's chloroacetic acid production capacity ranks first in the world, but the average size of the device is small, only 5,000 tons, only a few sets of production units above 10,000 tons, the average size of foreign devices is about 40,000 tons.
At present, the Chinese government pays more attention to environmental protection, promotes the promotion of cleaner production processes in various industries, and restricts the highly polluting industries. The sewage charges may be further increased. The domestic chloroacetic acid companies mostly use the intermittent sulfur production process. Each ton of chloroacetic acid produces 0.2 to 0.25 tons of mother liquor. The exhaust gas also causes great pollution to the environment. Not only is the pollution serious, but the production process is backward, the consumption of acetic acid in China is higher than that of foreign countries by about 30%, and the consumption of chlorine gas is about 25% higher. Due to the high cost of raw materials, the relatively energy-saving and environmentally friendly acetic anhydride production process is notoriously difficult.
Market development is facing difficulties Due to the overcapacity of chloroacetic acid, it is necessary to expand the international market, but the reduction of export tax rebate rate and the official implementation of the EU REACH regulation make the export situation of chloroacetic acid not optimistic. As the state has reduced the export tax rebate rate of chloroacetic acid from 13% to 5% from July 1, 2007, the export cost has increased by about 7% to 8%; the country is expected to further restrict the export of two high-grade chemical products. At the same time, the implementation of the REACH regulation has created obstacles for the entry of chloroacetic acid products into the EU market.
The synthetic routes for the major downstream products of chloroacetic acid are changing. Chloroacetic acid is an important fine chemical intermediate mainly used in the fields of synthetic pesticides, hydroxymethyl cellulose, medicines, dyes and some organic synthesis. In the field of pesticides, it is mainly used for the synthesis of glyphosate, omethoate and other varieties; in the fields of medicine and dyes, methyl chloroacetate, ethyl chloroacetate, thioglycolic acid, and chloroacetate are mainly synthesized based on chloroacetic acid. Ester and other fine chemical intermediates. Glyphosate is currently the fastest growing field of chloroacetic acid consumption. Recently, the production and sales of glyphosate are booming, but its process route is not only one. The production of glyphosate using diethanolamine as raw material has also been warming up recently. Changes in the production process will be Seriously affect the development of chloroacetic acid industry.
In light of the contradictions mentioned above, experts have suggested that the chloroacetic acid industry must be stronger, and must cooperate with the national macro-control to control the speed of construction and take the initiative to avoid risks; intensify the promotion and application of energy-saving and emission-reduction technologies and clean technologies, and accelerate downstream products. Develop and implement an integrated development strategy for the midstream and downstream industries. In addition, we must increase the development of the international market, adhere to the path of scale, and accelerate the process of mergers and acquisitions in China.
At the meeting, relevant experts also analyzed the problems existing in the production of chloroacetic acid from the technical point of view, and proposed the bottleneck to be overcome in the production of chloroacetic acid. First, the slow chlorination reaction, the small batch production capacity of a single set, the large size of the continuous reaction device leads to excessive investment; Second, the chlorination reaction selectivity is poor, the product requires a purification process, if the reaction selectivity is greater than 99.5%, chloroacetic acid production The process can eliminate subsequent purification steps and greatly simplify the chloroacetic acid production process. Compared with foreign technologies, domestic production processes have poor stability, long reaction cycles, small production capacity of single sets, high proportion of by-products in chlorinated reactants, and poor product quality, making it difficult to meet the requirements of the international market and unable to participate in international competition. Therefore, the improvement of the overall technical level of China's chloroacetic acid industry should be based on independent innovation, digestion and absorption of advanced foreign technology, increase investment in chloroacetic acid research and development, and rapidly increase the overall level of chloroacetic acid production in China as soon as possible in the international market. Stand firm and lay the foundation for creating a strong chloroacetic acid country.
The relevant person in charge of Hexagon Asia Pacific put forward his own opinions from the perspective of downstream consumers. He believes that in the development process of the chloroacetic acid industry, research on raw material acetic acid, liquid chlorine, and price fluctuations of downstream products, as well as research on upstream methanol raw materials for acetic acid are indispensable; it is necessary to further improve the supply chain and become a strategic supplier to major customers. In order to maximize profit, improve product quality, strengthen analysis and control including purity, dichloroacetic acid content, and heavy metal content; packaging should be in line with international standards, and now many foreign merchants prefer a large package of 1,000 kg. Product transport safety.
According to the smelting method can be divided into open hearth steel, converter steel;
According to the deoxidation method can be divided into boiling steel (F), sedated steel (Z), semi-sedated steel (b) and special sedated steel (TZ);
Carbon steel can be divided into low carbon steel (WC≤ 0.25%) medium carbon steel (WC0.25%-0.6%)and high carbon steel (WC≤ 0.6%) according to carbon content;
According to the quality of steel, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur content), high quality carbon steel (lower phosphorus and sulfur content) and high quality steel (lower phosphorus and sulfur content) and extra high quality steel.
Experts prescribe for the strong chloroacetic acid industry
At present, China has become the world's largest producer and consumer of chloroacetic acid, but the situation of being big but not strong has already begun to restrict the development of the industry. Mean profit or even negative profits has become a common phenomenon. How to profit in the fierce market competition has become a major issue for chloroacetic acid companies. At the 2007 China Chloroacetic Acid Industry Development Forum 2007 and the establishment of China Chlor-Alkali Industry Association chloroacetic acid professional committee, all experts and manufacturers gathered to discuss how to make the chloroacetic acid industry stronger. Experts believe that improving product quality, promoting clean technology, and achieving integrated upstream and downstream development will be the main direction of development of the chloroacetic acid industry in the future.