Chemical composition of acidified solution for improving permeability of coal seam

The invention provides a chemical composition of an acidified solution for improving permeability of a coal seam. The chemical composition is prepared from, by weight, 12%-15% of hydrochloric acid, 2%-2.5% of hydrofluoric acid, 2.5%-3% of acidification retarding agent, 1.5%-1.8% of acidification cor...

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Bibliographic Details
Main Authors PENG TIEFENG, WEN GUANGCAI, HU QIANTING, ZHAO BO, LIANG YUNPEI, TAN YOUTING
Format Patent
LanguageChinese
English
Published 15.03.2017
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:The invention provides a chemical composition of an acidified solution for improving permeability of a coal seam. The chemical composition is prepared from, by weight, 12%-15% of hydrochloric acid, 2%-2.5% of hydrofluoric acid, 2.5%-3% of acidification retarding agent, 1.5%-1.8% of acidification corrosion inhibitor, 0.3%-0.5% of ferric ion stabilizer, 2%-2.2% of anti-swelling agent and the balance water. The permeability of the coal seam is improved by adopting a chemical method, the chemical composition mainly aims at calcite, dolomite, silicate and other mineral components contained in the coal seam, the mineral components are dissolved by the acidified solution and flow from the coal seam with the acidified solution, cracks in the coal seam and the connectivity of the cracks are increased, the permeability of the coal seam is improved, and accordingly a coalbed methane (mine gas) extraction effect is improved. 本发明提供了种提高煤层渗透率的酸化溶液的化学配方，由以下成分按重量百分比组成：盐酸12％～15％、氢氟酸2％～2.5％、酸化缓速剂2.5％～3％、酸化缓蚀剂1.5％～1.8％、铁离子稳定剂0.3
Bibliography:Application Number: CN20161930776