Domestic BDO manufacturers (alkyne aldehyde method)
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Domestic BDO manufacturers (using the alkyne aldehyde method). The alkyne aldehyde method (Reppe method) is currently the most widely used in BDO production worldwide; it accounts for over 50% of the world’s total production capacity and over 60% of China’s total production capacity. The modified Reppe method uses acetylene and formaldehyde as raw materials, with copper/acetylene/bismuth as a catalyst to first produce 1,4-butynediol, which is then hydrogenated to yield BDO. The raw materials, acetylene and formaldehyde, can be obtained from petrochemical and coal chemical processes. The improved Reppe method features a wide range of available raw materials, low equipment investment, high safety of the installation, and a long production cycle. Therefore, all BDO plants built using the alkyne-aldehyde method employ the modified Reppe process. Enterprises producing 1,4-butyne diol using the Invidia process: Sequence Number, Factory Name, Production Capacity (10,000 tons), Volume of Fill (m3), Project Status: 1. Sinopec Great Wall Energy Chemical (Ningxia) Co., Ltd. – 20 tons; Already in operation. 2. Xinjiang Meike Chemical Co., Ltd. – 20 tons; Already in operation. 3. Shaanxi Longmen Coal Chemical Co., Ltd. – 6 tons; Already in operation. 4. Shaanxi Shanhua Coal Chemical Group Co., Ltd. – 10 tons; Already in operation. 5. Chongqing Chiyuan Chemical Co., Ltd. – 6 tons; Already in operation. 6. Fujian Meizhou Bay Chlor-Alkali Industry Co., Ltd. – 4 tons; Already in operation. 7. Xinjiang Lanshan Tunhe Polyester Co., Ltd. – 10 tons; Already in operation. 8. Sichuan Tianhua Co., Ltd. – 8 tons; Already in operation. 9. Inner Mongolia Dongyuan Technology Co., Ltd. – 10 tons; Already in operation.Enterprises producing 1,4-butyne diol using the 3D process: Sequence Number, Factory Name, Production Capacity (10,000 tons), Volume of Fill (m3), Project Status: 1. Henan Energy Chemical Group Heemei Company – 10 tons; Already in operation. 2. Henan Kaixiang Chemical Co., Ltd. – 15 tons; Already in operation. 3. Shanxi 3D Huabang Group Co., Ltd. – 18 tons; Already in operation. 4. Yunnan Yunwei Chemical Refining Co., Ltd. – 3 tons; Already in operation. 5. Xinjiang Meike Chemical Co., Ltd. (Phase I) – 10 tons; Already in operation. 6. Xinjiang Xinye Energy Chemical Co., Ltd. – 26 tons; Under construction. 7. Xinjiang Tianzhi Chenye Chemical Co., Ltd. – 20 tons; Under construction. 8. Shandong Weijiao Group Co., Ltd. – 5 tons; Under construction. 9. Sinopec Yizheng Chemical Fiber Co., Ltd. – 10 tons; Under construction. Xinjiang Guotai Xinhua Mining Co., Ltd.: 200,000 tons/year of BDO, 60,000 tons/year of PTMEG, 1.2 million tons/year of calcium carbide
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It’s pretty comprehensive. With BDO’s prices being so low these days, why is it still under construction?
The catalysts for Nvidia’s technology are gradually being produced domestically
The synthesis of 1,4-butanediol (BDO) involves two steps: In the first step, acetylene reacts with formaldehyde to produce 1,4-butynediol (BYD). A basic copper carbonate catalyst is used in this reaction; the reaction equation is as follows: C2H2 + HCHO → catalyst → CHΞCCH2OH (allyl alcohol). Then, CHΞCCH2OH reacts further with formaldehyde in the presence of the catalyst to yield HOCH2CΞCCH2OH (BYD) ； In the second step, 1,4-butynediol is hydrogenated to produce 1,4-butanediol (BDO). A Raney nickel catalyst is used for this synthesis; the reaction equation is as follows: HOCH2CΞCCH2OH + H2 → Catalyst → HOCH2CH=CHCH2OH + Q (butenediol, BED); HOCH2CH=CHCH2OH + H2 → Catalyst → HOCH2CH2-CH2CH2OH + Q (BDO)
Yizheng Chemical Fiber uses a butane-cyclohexanone oxide combined process.