On December 7, 2024, it was reported that Wanhua Chemical (Sichuan) Co., Ltd. has applied for a patent for a preparation method of 1,4-butanediol. According to information from the National Intellectual Property Administration, the patent, titled "A Preparation Method for 1,4-Butanediol," has the publication number CN 119080583 A, with an application date of August 2024. The patent summary indicates that the invention provides a method for preparing 1,4-butanediol that does not require the disposal of the copper-bismuth catalyst during maintenance shutdowns. By using appropriate conditions to preserve the catalyst's activity, the method not only prevents material loss, economic loss, and environmental pollution caused by the immediate emptying of the copper-bismuth catalyst after the acetylene gas cabinet is emptied but also maintains the catalytic activity of the copper-bismuth catalyst in the acetylene-formaldehyde reactor. This method is characterized by minimal material loss, environmental pollution, and economic waste. Wanhua Chemical (Sichuan) Co., Ltd. has a natural gas-acetylene-BDO-GBL-methylamine-NMP industrial chain project with an annual production capacity of 290,000 tons, including 100,000 tons of BDO and 80,000 tons of NMP. It features the largest single-line integrated facility in the world and a project for producing 10,000 tons of potassium battery monomer materials annually. The park is also equipped with a PBAT project with an annual production capacity of 60,000 tons. Source: Internet
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