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Citation: WANG Cheng-Wen, WANG Rui-He, BU Yu-Huan, ZHOU Wei-Dong, CHENG Rong-Chao. Synthesis and Properties of Gelatin with Sulfonated Side Chains as an Oil Well Cement Dispersant[J]. Chinese Journal of Applied Chemistry, ;2009, 26(4): 373-377. shu

Synthesis and Properties of Gelatin with Sulfonated Side Chains as an Oil Well Cement Dispersant

1.
College of Petroleum Engineering, China University of Petroleum, Dongying 257061

Corresponding author: WANG Rui-He,
Received Date: 21 April 2008
Available Online: 30 June 2008
Fund Project: 国家“八六三”高技术研究发展计划(2006AA09Z340)资助项目 (2006AA09Z340)

A new cement dispersant for oil well cement,gelatin with sulfonated side chains,was synthesized by sulfonation grafting reaction of gelatin with formaldehyde,acetone and sodium pyrosulfite.FT-IR was utilized to confirm the presence of the sulfonated side chains on the gelatin.When the concentration of the synthesized dispersant reached 1%,the fluidity index,the consistency coefficient and the thickening time ratio of cement slurry were 1.124,0.014 and 1.02 respectively,and the corresponding compression-strength ratio was larger than 1.0.Meanwhile,with the same loading of the synthesized dispersant,the fluidity indexes and consistency coefficients of the saline cement slurries with 18%NaCl,37%NaCl or 2%CaCl₂ were 1.021,1.087,0.914,and 0.035,0.025,0.063,respectively.Test results verified that the modified gelatin had an excellent dispersivity,strong brine tolerance and no side effect of retardation on cement slurry,as well as similar properties of conventional dispersants in the form of sulfonated aldehyde and ketone condensate.The gelatin with sulfonated side chains is expected to be a new kind of biodegradable dispersant.
- dispersant,
- oil well cement,
- gelatin,
- sulfonated condensate,
- biodegradation
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