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Cationic dehydrating agent preparation method

A cationic, dehydrating agent technology, applied in the field of cationic dehydrating agent preparation, can solve the problems of low molecular weight of flocculants, poor flocculation and bridging ability, etc., and achieve the effect of improving dehydration effect, easy control, and easy polymerization process

Active Publication Date: 2009-06-10
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 preparation method
  • Cationic dehydrating agent preparation method
  • Cationic dehydrating agent preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0021] Into a 1000ml four-necked flask equipped with a thermometer, a feeding tube and a nitrogen inlet and outlet, add 96.9g of acrylamide monomer, 33.8g of cationic monomer methacryloxyethyltrimethylammonium chloride, ethylenediaminetetramine Disodium acetate (chemically pure) 0.38g, deionized water 500ml, blow nitrogen to remove dissolved oxygen, and finally add N,N-dihydroxyethylazobisisobutyramidine hydrochloride initiator 5×10 -4 mol / L, 0.5 g of ammonium persulfate (chemically pure) and 0.4 g of sodium hydrogen sulfite (chemically pure) were added, and a copolymerization reaction was carried out in a water bath at 35° C. for 6 hours. After the reaction is completed, 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, a feeding tube and a nitrogen inlet and outlet, add 131.3g of acrylamide monomer, 25.3g of cationic monomer methacryloyloxyethyltrimethylammonium chloride, ethylenediaminetetramine Disodium acetate (chemically pure) 0.55g, deionized water 500ml, blow nitrogen to remove dissolved oxygen, and finally add N,N-dihydroxyethylazobisisobutyramidine hydrochloride initiator 10 -4 mol / L, 0.35 g of ammonium persulfate (chemically pure) was added, and a copolymerization reaction was carried out in a water bath at 55° C. for 5 hours. After the reaction is completed, it is extruded, granulated, 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 preparation method of a cationic dehydrating agent, in particular to the preparation method of a cationic dehydrating agent for oily sludge treatment produced in the production process of petroleum and chemical industries. 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 sewage oil tanks. There are also a lot of oily sludge in the selection tank and aeration tank. 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, its oil content and water content are quite different. Oil is composed of hundreds of different types of organic compounds, m...

Claims

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Application Information

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