Method for producing carbon black by lignite semi-coke
A technology of lignite semi-coke and carbon black, applied in fibrous fillers and other directions, to achieve significant economic value and social benefits, increase the added value of products, and expand the source of raw materials for production.
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Embodiment 1
[0022] Lignite semi-coke A1 (12.8% volatile matter content, 7.6% ash content) was ball-milled on a ball mill for 5 hours, and then the ground semi-coke powder was passed through a 325-mesh (45 μm) sieve to extract the Remove impurities from the powder; under the protection of nitrogen, pass carbon tetrachloride gas to heat the semi-coke powder at 800°C for 2 hours to reduce its volatile content to 4.5%; then use 5% dilute hydrochloric acid to remove the semi-coke powder From the ash content to 0.5%, then use 5% KOH solution to adjust its pH value to 7, then add 50% N330 carbon black and 0.5% titanate coupling agent TM-139 to react and dry to obtain Product A. Product A was tested according to the national standard "GB 3778-2011 Carbon Black for Rubber", and the results are shown in Table 1. It can be seen from Table 1 that the physical properties of product A have reached the performance requirements of natural gas semi-reinforced carbon black.
Embodiment 2
[0024] Put lignite semi-coke B1 (15.1% volatile matter content, 7.5% ash mass content) into the jet mill, and then pass the semi-coke powder collected at the outlet of the jet mill through a 325 mesh (45 μm) sieve to extract The powder passing through the sieve is removed; first, the semi-coke powder is poured into toluene for extraction to reduce its volatile content to 1.9%; then 10% dilute sulfuric acid is used to remove the ash in the semi-coke powder until the ash content is 0.4%, and then use 10% NaOH solution to adjust its pH value to 8, then add 30% carbon nanotubes and 10% aluminate coupling agent DL-411, and dry it to obtain product B. Product B was tested according to the national standard "GB 3778-2011 Carbon Black for Rubber", and the results are shown in Table 1. It can be seen from Table 1 that the physical properties of product B meet the performance requirements of N660 carbon black.
Embodiment 3
[0026] Put lignite semi-coke C1 (11.6% volatile matter content, 9.2% ash mass content) into the jet mill, and then pass the semi-coke powder collected at the outlet of the jet mill through a 325 mesh (45 μm) sieve to extract The powder passing through the sieve is removed; first, the semi-coke powder is poured into toluene for extraction to reduce its volatile content to 1.2%; then 15% dilute nitric acid is used to remove the ash in the semi-coke powder until the ash content is 0.5%, and then use 5% KOH solution to adjust its pH value to 6, then add 2% silane coupling agent Si69, and dry it to obtain product C. Product C is obtained after drying. Product C was tested according to the national standard "GB 3778-2011 Carbon Black for Rubber", and the results are shown in Table 2. It can be seen from Table 2 that the physical properties of product C have reached the performance requirements of N326 carbon black.
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