Technological method for producing acetylene by efficient calcium carbide process

• Main Authors: QIU YONGGUI, ZOU CHENGLEI, ZHANG YANMING, WEI ZHAOHUI, LI YI
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2017
• Subjects: CHEMISTRY; FUELS; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF ACETYLENE BY WET METHODS; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The invention provides a technological method for producing acetylene by an efficient calcium carbide process, which comprises the following steps: grinding calcium carbide, and then degressively adding into a vacuum reactor, wherein the internal temperature of the vacuum reactor is 45-55 DEG C and the vacuum reactor contains a mixture of a saturated salt solution and an alkaline water solution; controlling the temperature of the whole reaction system to be not higher than 70 DEG C; and introducing acetylene gas subjected to preliminary purification into an acidic water solution and concentrated sulfuric acid sequentially for carrying out secondary purification, so as to obtain highly pure acetylene gas. Compared with the prior art, the technological method provided by the invention has the following advantages: a generated pasty calcium hydroxide solid quickly settles so as to prevent the surface of powdered calcium carbide from being wrapped and affecting the continuous operation of the reaction; the gas pr