Preparation method, product and application of modified lignite

• Main Authors: DI JUNZHEN, CAO YANG, ZHAO WENQI, WANG XIANJUN, DONG YANRONG, BAO SIHANG
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2021
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of lignite modification, in particular to a preparation method, a product and application of modified lignite. The preparation method specifically comprises the following steps: placing a lignite raw material in a methanol solution, carrying out heating and uniform mixing, adding a mercaptosilane coupling agent, conducting mixing, and carrying out heating for a reaction to obtain the modified lignite. According to the invention, in a methanol solution, the lignite is modified by using a sulfydryl silane coupling agent, the molecular structure of the sulfydryl silane coupling agent contains siloxy and sulfydryl groups, and the siloxy and a sulfydryl-containing carrier substance are prone to a hydrolysis reaction to form a -C-Si-O- bond, so the sulfydryl groups are grafted to the surface of the carrier substance; and since the sulfydryl groups are grafted on the surface of the lignite, the metal ion adsorption capacity of the lignite is improved. 本发明涉及褐煤改性技术领域，具体涉及一种