Cationic dehydrating agent and its preparation method

A cationic, dehydrating agent technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of poor flocculation bridging ability and low molecular weight of flocculants, and achieve easy control, improved dehydration effect, and short reaction time Effect

Active Publication Date: 2007-05-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculant obtained by this method has the disadvantages of low molecular weight, poor flocculation and bridging ability, etc.

Method used

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  • Cationic dehydrating agent and its preparation method
  • Cationic dehydrating agent and its preparation method
  • Cationic dehydrating agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Into a 1000ml four-necked flask equipped with a thermometer, feeding tube, and nitrogen inlet and outlet, add 116.3g of acrylamide monomer, 44.6g of cationic monomer methacryloyloxyethyltrimethylammonium chloride, ethylenediaminetetra Disodium acetate (chemically pure) 0.45g, deionized water 500ml, blow nitrogen to remove dissolved oxygen, finally add N,N-dihydroxyethyl azobisisobutylamidine hydrochloride initiator 10 -4 mol / L, 0.3 g of ammonium persulfate (chemically pure) and 0.3 g of sodium bisulfite (chemically pure) were added, and the copolymerization reaction was carried out in a water bath at 40° C. for 4 hours. After the reaction is finished, it is extruded to granulate, dried and pulverized to obtain dehydrating agent-1.

Embodiment 2

[0021] Into a 1000ml four-neck flask equipped with a thermometer, feeding tube, and nitrogen inlet and outlet, add 96.9g of acrylamide monomer, 33.8g of cation monomer methacryloyloxyethyltrimethylammonium chloride, ethylenediaminetetra Disodium acetate (chemically pure) 0.38g, deionized water 500ml, blowing nitrogen to remove dissolved oxygen, finally add N, N-dihydroxyethyl azobisisobutylamidine hydrochloride initiator 5 * 10 -4 mol / L, 0.5 g of ammonium persulfate (chemically pure) and 0.4 g of sodium bisulfite (chemically pure) were added, and copolymerization was carried out in a water bath at 35° C. for 6 hours. After the reaction is finished, it is extruded to granulate, dried and pulverized to obtain dehydrating agent-2.

Embodiment 3

[0023] Into a 1000ml four-necked flask equipped with a thermometer, feeding tube, and nitrogen inlet and outlet, add 131.3g of acrylamide monomer, 25.3g of cationic monomer methacryloyloxyethyltrimethylammonium chloride, ethylenediaminetetra Disodium acetate (chemically pure) 0.55g, deionized water 500ml, blow nitrogen to remove dissolved oxygen, finally add N, N-dihydroxyethyl azobisisobutylamidine hydrochloride initiator 10 -4 mol / L, add 0.35 g of ammonium persulfate (chemically pure), and carry out copolymerization reaction for 5 hours in a water bath at 55°C. After the reaction is finished, it is extruded to granulate, dried and pulverized to obtain dehydrating agent-3.

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Abstract

A cationic dewatering agent for treating sewage or sludge is prepared from acrylamide, methylacrolyloxyethyl ammonium chloride and deionized water through polymerizing reaction in solution under the action of trigger, granulating, drying and pulverizing.

Description

technical field [0001] The invention relates to a cationic dehydrating agent and a preparation method thereof, in particular to a cationic dehydrating agent for treating oily sludge produced in the production process of petroleum and chemical industries and a preparation method thereof. Background technique [0002] Oily sludge is mainly produced in oil fields and refineries. For example, in the dehydration of crude oil, there is a large amount of oily sludge at the bottom of dehydration tanks, oil storage tanks and waste oil tanks; There is also a large amount of oily sludge in the selection pond and aeration pond. The composition of these sludges is very complex, generally composed of oil-in-water (O / W), water-in-oil (W / O) and suspended solids, and is fully emulsified with high viscosity and difficult to settle. Due to the different production processes of oily sludge, there is a large difference in oil and water content. Oil is composed of hundreds of different types of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C08F220/56C08F4/04C08F4/40
Inventor 王有华杨丽赵景霞黄玉洪
Owner CHINA PETROLEUM & CHEM CORP
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