发明名称 |
METHOD FOR PREPARING A GELLING AND VISCOSIFYING AGENT FOR DRILLING MUD AND THE PRODUCT THEREOF |
摘要 |
A method for preparing lignin graft copolymer comprising: reacting lignocellulosic materials with an acrylic compound by bulk condensation under nitrogen atmosphere in the presence of a non-oxidizing strong organic acid as catalyst; separating the reaction mixture to obtain a solid phase mainly containing lignocellulosic materials and a liquid phase containing lignin graft copolymer and unreacted acrylic compound; and removing solvent from the liquid phase to obtain the lignin graft copolymer. |
申请公布号 |
US2012122738(A1) |
申请公布日期 |
2012.05.17 |
申请号 |
US200913382489 |
申请日期 |
2009.10.21 |
申请人 |
BIN MOHAMAD IBRAHIM MOHAMAD NASIR;AHMED MOHAMED HARAS MOHAMED RASHID;SIPAUT COSWALD STEPHEN |
发明人 |
BIN MOHAMAD IBRAHIM MOHAMAD NASIR;AHMED MOHAMED HARAS MOHAMED RASHID;SIPAUT COSWALD STEPHEN |
分类号 |
C09K8/20;C08H7/00 |
主分类号 |
C09K8/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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