Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production method of high-adaptability green scale inhibitor and composite scale inhibitor thereof

A technology of composite antiscalant and production method, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve aggravated environmental pollution, different adaptability, and non-conforming to environmental protection Sustainable development and other issues, to achieve the effect of high coordination, increased corrosion inhibition, and good compound use effect

Active Publication Date: 2020-11-10
SHANDONG FOOD & FERMENT IND RES & DESIGN INST
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, it is found that the dispersing and antiscaling effect of polyaspartic acid alone cannot fully meet the needs of production and application, and the compound use of other antiscalants can achieve better results, and the polyaspartic acid obtained by different production processes The compatibility between aspartic acid and other scale inhibitors is different, which limits the practical application of polyaspartic acid, and the current application of phosphorus-containing catalysts further aggravates environmental pollution, which does not conform to the concept of green and sustainable development

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The production method of highly adaptable green scale inhibitor according to the present embodiment comprises the following steps:

[0030] (1) Preparation of mixed catalyst

[0031] Mix the dibasic acid polymer and the ionic liquid at a mass ratio of 1:1, and stir evenly to obtain a mixed catalyst. Among them, the dibasic acid polymer is reacted at 160°C with oxalic acid and ethylene glycol as raw materials until there is no more distillate. After cooling, phthalic anhydride is added, and the temperature is slowly raised to 200°C. React until there is no more effluent. Then cool it for later use. The ionic liquid is [Hmim]HSO 4 .

[0032] (2) Thermal polycondensation of aspartic acid

[0033] Add the mixed catalyst and aspartic acid into the reactor at a ratio of 1:1.1, stir and heat to 180° C., and the reaction time is 2 hours to obtain a mixed reaction liquid. Suction filtration after standing to obtain polysuccinimide.

[0034] (3) Generation reaction of polya...

Embodiment 2

[0050] The difference from Example 1 is that the dibasic acid polymer and the ionic liquid are mixed in a mass ratio of 2:3, and the ionic liquid is [Bmim]HSO 4 , the thermal polycondensation reaction temperature was 200°C, the reaction time was 3h, and other steps and parameters were the same as in Example 1.

[0051] The composite scale inhibitor A compounded with the polyaspartic acid sample prepared according to the production method of the highly adaptable green scale inhibitor in this embodiment has a scale inhibition rate of 98.5% and a corrosion inhibition rate of 92.7%; Scale inhibitor B, the scale inhibition rate reaches 95.1%, and the corrosion inhibition rate reaches 69%; the compound scale inhibitor C, the scale inhibition rate reaches 92.5%, and the corrosion inhibition rate reaches 87.3%; the compound scale inhibitor D, the scale inhibition rate reaches 97.4% , the corrosion inhibition rate reached 92.1%; the composite scale inhibitor E, the scale inhibition rat...

Embodiment 3

[0053] The difference from Example 1 is that the dibasic acid polymer and the ionic liquid are mixed in a mass ratio of 5:6, the ionic liquid is [Bmim]Br, the hydrolysis temperature is 40°C under alkaline conditions, the hydrolysis time is 1.5h, other steps And, parameter are identical with embodiment 1.

[0054] The composite scale inhibitor A compounded by the polyaspartic acid sample prepared according to the production method of the highly adaptable green scale inhibitor in this embodiment has a scale inhibition rate of 97.5% and a corrosion inhibition rate of 93.8%; Scale inhibitor B, the scale inhibition rate reaches 93.7%, and the corrosion inhibition rate reaches 70.5%; the compound scale inhibitor C, the scale inhibition rate reaches 90.7%, and the corrosion inhibition rate reaches 88.9%; the compound scale inhibitor D, the scale inhibition rate reaches 95.6% , the corrosion inhibition rate reached 98.1%; the composite scale inhibitor E, the scale inhibition rate reac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
scale inhibition rateaaaaaaaaaa
scale inhibition rateaaaaaaaaaa
scale inhibition rateaaaaaaaaaa
Login to View More

Abstract

The invention provides a high-adaptability green scale inhibitor production method and a composite scale inhibitor thereof, and the method comprises the following steps: uniformly mixing a binary acidpolymer with a composite ionic liquid to prepare a mixed catalyst; adding the mixed catalyst and aspartic acid into a reactor, stirring and heating to 170-220 DEG C, and carrying out thermal polycondensation reaction for 50 minutes to 4 hours to obtain a mixed reaction solution; standing the mixed reaction solution, and performing suction filtration to obtain polysuccinimide; slowly adding a NaOHsolution into the polysuccinimide obtained in the previous step, hydrolyzing for 0.5-2 hours at the temperature of 25-50 DEG C, adjusting the pH value of hydrolysate to 4.0 or below to terminate thereaction, adding excessive ethanol, standing and carrying out suction filtration to obtain the polyaspartic acid. According to the technical scheme, the non-phosphorus catalyst is used for catalyzingthermal shrinkage and reaction of aspartic acid, the obtained polyaspartic acid product is non-toxic and harmless and can be compounded with various scale inhibitors for use, the scale inhibition effect of compounding reaches 90% or above, and the corrosion inhibition rate reaches 65% or above.

Description

technical field [0001] The invention relates to the technical field of chemical separation and synthesis, in particular to a production method of a highly adaptable green scale inhibitor and a composite scale inhibitor. Background technique [0002] Polyaspartic acid (PASP) is a polymer formed by polycondensation of amino and carboxyl groups in aspartic acid, which belongs to polyamino acid. Polyaspartic acid not only has good calcium ion exchange capacity and biodegradability, but also can destroy calcium salt crystal scaling, and can be used as a dispersant, scale inhibitor, corrosion inhibitor, washing aid, etc., and has a very wide range of uses . Among them, due to its excellent scale inhibition performance, biodegradability, and non-toxicity, it has great advantages compared with traditional scale inhibitors, and it is more in line with the requirements of green environmental protection, because it has great application prospects. [0003] At present, there are two m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/14C02F5/10
CPCC02F5/12C02F5/125C02F5/145C02F5/10
Inventor 徐慧田延军刘建军李文婧王珊珊周思多
Owner SHANDONG FOOD & FERMENT IND RES & DESIGN INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com