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Non-ionic polymeric compound for inhibiting deposition of silicon dioxide/silicate dirt in water and method of producing same

A silica, non-ionic technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve problems such as limited effect and short time

Inactive Publication Date: 2008-08-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These traditional organic phosphine scale inhibitors and anionic polymer dispersants are ionic compounds, and their effects are often limited. Practice has proved that for amorphous SiO 2 The inhibition of scale precipitation is often maintained for a short time (EleftheriaNeofotistou, Konstantinos D. Demadis. Use of antiscalants for mitigation of silica (SiO 2 ) fouling and deposition: fundamentals and applications in desalination systems [J]. Desalination, 2004, 167(8): 257-272.)

Method used

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  • Non-ionic polymeric compound for inhibiting deposition of silicon dioxide/silicate dirt in water and method of producing same
  • Non-ionic polymeric compound for inhibiting deposition of silicon dioxide/silicate dirt in water and method of producing same
  • Non-ionic polymeric compound for inhibiting deposition of silicon dioxide/silicate dirt in water and method of producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of adipic acid / amino-terminated polyether / diethylenetriamine copolymer

[0032] Add 34.5g of amino-terminated polyether D230 and 87.6g of diethylenetriamine into a four-necked flask equipped with a stirring, thermometer, ventilation tube, steam condenser and steam trap, stir well and then slowly add 70g of Deionized water, after stirring for 10 minutes, add 146g of adipic acid in batches while stirring, and control the temperature <70°C. After adding adipic acid, feed nitrogen, place in an oil bath and start heating to 180°C, when the temperature rises to 120°C~125°C, condensed water begins to appear, which is collected through a steam condenser and a steam trap The condensed water was collected, and the temperature was continued to rise until the temperature of the reaction liquid reached 180° C., and the reaction was carried out at 180° C. for 4 hours to obtain a yellow viscous substance. Then the reaction solution was cooled to 125°C, 348g of d...

Embodiment 2

[0033] Example 2 Preparation of adipic acid / amino-terminated polyether / diethylenetriamine copolymer

[0034] Add 27.0g of amino-terminated polyether D230 and 109.0g of diethylenetriamine to a four-necked flask equipped with stirring, thermometer, ventilation tube, steam condenser and steam trap, stir well and then slowly add 88g under stirring Deionized water, after stirring for 10 minutes, add 175.2 g of adipic acid in batches while stirring, and control the temperature <70°C. After adding adipic acid, feed nitrogen, place in an oil bath and start heating to 180°C, when the temperature rises to 120°C~125°C, condensed water begins to appear, which is collected through a steam condenser and a steam trap The condensed water was collected, and the temperature was continued to rise until the temperature of the reaction liquid reached 180° C., and the reaction was carried out at 180° C. for 4 hours to obtain a yellow viscous substance. Then the reaction solution was cooled to 120°...

Embodiment 3

[0035] Example 3 Preparation of adipic acid / amino-terminated polyether / diethylenetriamine copolymer

[0036] Add 46.0g of amino-terminated polyether D230 and 82.4g of diethylenetriamine to a four-necked flask equipped with stirring, thermometer, vent pipe, steam condenser and steam trap, stir well and then slowly add 80g under stirring Deionized water, after stirring for 10 minutes, add 160.7g of adipic acid in batches while stirring, and control the temperature <70°C. After adding adipic acid, feed nitrogen, place in an oil bath and start heating to 180°C, when the temperature rises to 120°C~125°C, condensed water begins to appear, which is collected through a steam condenser and a steam trap The condensed water was collected, and the temperature was continued to rise until the temperature of the reaction liquid reached 180° C., and the reaction was carried out at 180° C. for 4 hours to obtain a yellow viscous substance. Then the reaction solution was cooled to 125°C, 370g o...

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Abstract

The invention pertains to the technical field of industrial water treatment, which more particularly relates to a non-ionic polymer which restricts the depositions of silica / silicates in water and a preparation method thereof. The polymer is a non-ionic copolymer which contains ether linkage, secondary amine linkage and peptide linkage, substantially the non-ionic copolymer is a hexanedioic acid / amino terminated polyether / divinyl three amine copolymer. According to the regular condensation polymerization principle, a certain amount of amino terminated polyether D230 and a certain amount of divinyl three amine are mixed uniformly by water, and then a certain amount of hexanedioic acid is added in and stirred for dissolving. The condensation polymerization is carried out again under certain temperature and the released moisture in the process is removed. After 3-5 hours of condensation polymerization, the temperature is reduced to 120-125 DEG C and a certain amount of deionized water is added which is stirred for 2-3 hours under the same temperature. Subsequently the temperature is cooled to the room temperature and the required polymer is obtained. The polymer has good restriction and dispersal effects on the deposits of silicon dioxide / silicate in the water system and is a novel non-ionic polymer which is phosphate-free and biodegradable.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to a nonionic polymer for inhibiting the deposition of silicon dioxide / silicate in water and a preparation method thereof. Background technique [0002] In the field of industrial water treatment, raw water usually contains a large amount of alkaline earth metal cations such as Ca 2+ , Mg 2+ 、Ba 2+ etc. and anionic groups such as CO 3 3- , SO 4 2- and PO 4 3- etc., and soluble silica. Under certain conditions (such as evaporation, concentration, etc.), these cations and anions are easily combined to form CaCO 3 , CaSO 4 , BaSO 4 , Ca 3 (PO 4 ) and other inorganic salt scales are deposited on the surface of water treatment pipes and equipment to cause harm. Soluble silica in water will also form insoluble silica and silicate deposits on the surface of water treatment pipes and equipment under certain conditions, which will also cause harm ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/40C02F5/12
Inventor 张冰如李风亭
Owner TONGJI UNIV
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