Feasibility of producing silica gel in chlor-alkali enterprises
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This post was last edited by sunjl1981 on 2013-1-6 at 22:35. Factors such as a trend of alkali surplus in the market, a surplus of by-product hydrochloric acid, rising prices for soda ash, sulfuric acid, and energy, all contribute to making it favorable for chlor-alkali companies to enter the silica gel production industry. Technically: liquid-phase water glass and silica gel produced by the hydrochloric acid method are superior to those produced by the sulfuric acid method, etc. Others: It can make full use of the waste heat and condensate from chlor-alkali production, and recycle the wastewater containing silica to be used in chlor-alkali processes. Facilitates a circular economy. Additionally, silica has a certain price advantage; chlor-alkali companies that produce silica enjoy significant advantages in terms of transportation. # hcbbs
Who has detailed information on this? Please pass it on
It’s a good choice; the plan could be more detailed.
Suggestions on the handling of by-products at Ningbo Wanhua Polyurethane Co., Ltd. and Ningbo Donggang Electrochemical Co., Ltd. The 160,000 tons per year MDI production facility of Ningbo Wanhua Polyurethane Co., Ltd. (hereinafter referred to as Ningbo Wanhua) has been expanded to 240,000 tons per year; a new MDI plant with a capacity of 300,000 tons per year is currently under design. By 2010, Ningbo Wanhua’s total MDI production capacity had reached around 600,000 tons per year. Ningbo Donggang Electrochemical Co., Ltd. (hereinafter referred to as Donggang Electrochemical) was established to support the expansion of Ningbo Wanhua’s MDI production capacity. A new caustic soda production facility with an output of 200,000 tons per year will be added by 2010, bringing the total capacity to 320,000 tons per year, with the ultimate goal of reaching a capacity of 460,000 tons per year. Based on the ratio of 0.6 tons of HCl produced per ton of MDI, by 2010, 360,000 tons of HCl as a by-product would have been generated. If this HCl were converted into hydrochloric acid, more than 1.16 million tons of hydrochloric acid would be put on the market, putting significant pressure on surrounding markets. Although the current production capacity for MDI is still limited, there are already instances of hydrochloric acid remaining unsold. By the time Ningbo Wanhua reaches 600,000 tons per year, it will consume approximately 160,000 tons of alkali. As a result, Donggang Electrochemical has put 300,000 tons of caustic soda on the market. This post was last edited by jjf278204 on 2008-9-5 09:41.]
Is there anything related to material balance? I’m interested in taking a look too
The poster’s suggestion is indeed reasonable. During periods when the price of sulfuric acid remains high, there is indeed market potential for producing silica using the hydrochloric acid method. However, it is necessary to strengthen technical research on this method and improve it, so that the products produced by both the hydrochloric acid method and the sulfuric acid method can meet the same quality standards. Because under normal circumstances, the hydrochloric acid method is inferior to the sulfuric acid method.
Some chlor-alkali manufacturers are already producing silica gel as a by-product
Chlor-alkali enterprises can develop trichlorosilane products and use the by-product silicon tetrachloride to produce silica gel. It’s a good idea.
Textbooks all state that the hydrochloric acid method yields better quality than the sulfuric acid method; how can you think that the sulfuric acid method produces better quality? Is there any evidence for this?
Is there a detailed feasibility report?
Chlor-alkali enterprises can develop trichlorosilane products and use the by-product silicon tetrachloride to produce silica gel. It’s a good idea. Does anyone have information on this? My email is htl707399@sina.com. Thank you!