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Starch type bridging agent and method of preparing the same

A technology of bridging agent and starch, applied in the field of bridging agent, can solve the problems of poor stability of bridging agent and high production cost of bridging agent, reduce the amount of oil phase, reduce transportation cost and storage cost, and improve effective components The effect of content

Inactive Publication Date: 2009-01-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high production cost of the bridging agent in the prior art and the poor stability of the bridging agent prepared, and to provide a starch type bridging agent and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific embodiment one: in this embodiment, the starch type bridging agent is made of water phase, oil phase, dimethyl sulfate, K 2 S 2 o 6 、Na 2 S 2 o 5 and adducts; wherein the volume ratio of the water phase to the oil phase is 0.75 to 0.78: 0.22 to 0.25, the molar ratio of dimethyl sulfate to the adduct is 1: 1.2 to 1.6, and the adduct to K 2 S 2 o 6 The mass ratio is 2000:1~2, the adduct and Na 2 S 2 o 5 The mass ratio of the adduct is 2000:0.5~1, and the addition amount of the adduct is 20%~35% of the total mass of the water phase and the oil phase; Formaldehyde solution with a concentration of 36% is prepared by mixing and stirring for 5 to 10 minutes at a mass ratio of 1:1.2 to 1.6; the pH value of the aqueous phase is 7.8 to 9.8, and the solute is composed of acrylamide, sodium acrylate, dimethyl-diallyl ammonium chloride, amylose, disodium EDTA and Na 2 S 2 o 5 Composition, the total mass concentration of solute is 30%~50%, the mass ratio of acry...

specific Embodiment approach 2

[0011] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the sorbitan ester is Span-80 or Span-60. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment is different from Embodiment 1 in that the polyoxyethylene sorbitan ether is Tween-80 or Tween-85. Others are the same as in the first embodiment.

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PUM

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Abstract

Disclosed is a starch type bridging agent as well as a preparation method thereof, relating to a bridging agent. The bridging agent and preparation method solve the problems of high production cost and poor stability of the prepared bridging agent in the prior art. The bridging agent is made of a water phase, an oil phase, dimethyl sulfate and an addition compound, The method comprises: dripping the water phase prepared by amylose, acrylamide, sodium acrylate, dimethyl-ammonium chloride, Disodium EDTA and Na2S2O5 into the oil phase prepared and mixed by iso-paraffin solvent oil, sorbitan oleate and sorbitan oleate polyethenoxy ether, adding K2S2O6 and Na2S2O5, and then dripping the addition compound for reaction for six to ten hours, then adding dimethyl sulfate having a molar ratio of 1:1.2 to 1.6 with the addition compound for reaction for two hours, so as to acquire the bridging agent. The bridging agent and preparation method need no assistance of heating device and can save costs, and the prepared starch type bridging agent has the unchanged state as time goes by, and is noncombustible and inexplosive.

Description

technical field [0001] The present invention relates to a bridging agent. Background technique [0002] In the prior art, the bridging agent usually has an oil phase to water phase ratio of 2:5 to 7:2, but this bridging agent is unstable, and the oil phase often precipitates out after being placed, and high-speed stirring is required before use, and this operation Sometimes it will cause the demulsification of the bridging agent or cause the mechanical degradation of the components; even if this bridging agent uses 2.5 to 3.5 times the oil phase of the water phase, it still cannot solve the difficulty of deriving the heat of polymerization, and in order to obtain the active ingredient later Higher products are often realized by heating equipment, which is not only cumbersome but also consumes high energy, resulting in high production costs and expensive products, and this bridging agent has high oil content, which makes transportation costs and storage costs due to fire prev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F1/52C08F251/00C08F2/22C08F6/14
Inventor 綦峥祁佩时
Owner HARBIN INST OF TECH