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

Preparation method of modified silane papermaking wastewater defoaming agent

A technology for papermaking wastewater and defoaming agent, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., can solve problems such as difficult to maintain effect, high temperature, high alkali content, etc., to improve washing effect, surface Low tension, the effect of promoting emulsification

Inactive Publication Date: 2021-01-26
瑞普环保新材料(广州)有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the black liquor produced in the papermaking pulping process has a higher temperature and a higher alkali content, and it is difficult for the traditional silicone defoamer to maintain the desired effect in the papermaking black liquor

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of modified silane papermaking wastewater defoaming agent
  • Preparation method of modified silane papermaking wastewater defoaming agent
  • Preparation method of modified silane papermaking wastewater defoaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of modified silane papermaking waste water defoamer, its specific scheme is as follows:

[0028] Add 2.9g of octamethylcyclotetrasiloxane, 2.3g of octamethyltrisiloxane and 0.05g of catalyst into the reaction kettle, control the temperature at 100°C, and stir for 60 minutes. After completion, add 3.1g of 2,4,6, 8-Tetramethyl-2,4,6,8-tetrakis(3,3,3-trifluoropropyl)cyclotetrasiloxane was slowly added into the reaction kettle, and the addition was completed within 10 minutes, and then the stirring reaction was continued for 60 minutes. After completion, raise the temperature to 140°C, stir and react for 20 minutes; then add 24g semicarbazide modified silicone, 4g white carbon black and 0.01g catalyst into the reaction kettle, control the temperature at 80°C, stir and react for 30min, then add 0.1g emulsifier Stir and mix with 40g of pure water evenly, add it into the reaction kettle, and stir vigorously for 1 hour to obtain the modified silane ...

Embodiment 2

[0036] A kind of preparation method of modified silane papermaking waste water defoamer, its specific scheme is as follows:

[0037] Add 3.4g of octamethylcyclotetrasiloxane, 2.7g of octamethyltrisiloxane and 0.1g of catalyst into the reactor, control the temperature at 110°C, stir for 90 minutes, and add 3.8g of 2,4,6, 8-Tetramethyl-2,4,6,8-tetrakis(3,3,3-trifluoropropyl)cyclotetrasiloxane was slowly added into the reaction kettle, controlled for 20 minutes to complete the addition, and then continued to stir for 90 minutes. After completion, the temperature was raised to 155°C, and stirred for 25 minutes; then 32g of semicarbazide-modified silicone, 6g of white carbon black and 0.04g of catalyst were added to the reaction kettle, the temperature was controlled at 90°C, stirred for 40 minutes, and then 0.3g of emulsifier was added Stir and mix with 50 g of pure water evenly, add it into the reaction kettle, and stir vigorously for 2 hours to obtain the modified silane paperma...

Embodiment 3

[0044] A kind of preparation method of modified silane papermaking waste water defoamer, its specific scheme is as follows:

[0045] Add 3.8g of octamethylcyclotetrasiloxane, 3.2g of octamethyltrisiloxane and 0.15g of catalyst into the reactor, control the temperature at 120°C, stir for 120min, and add 4.8g of 2,4,6, 8-Tetramethyl-2,4,6,8-tetrakis(3,3,3-trifluoropropyl)cyclotetrasiloxane was slowly added to the reaction kettle, and the addition was completed within 30 minutes, and then continued to stir for 120 minutes. After completion, the temperature was raised to 165°C and stirred for 30 minutes; then 38g of semicarbazide-modified silicone, 10g of white carbon black and 0.08g of catalyst were added to the reaction kettle, the temperature was controlled at 110°C, stirred for 60 minutes, and then 0.6g of emulsifier was added Stir and mix with 60g of pure water evenly, add it into the reaction kettle, and stir vigorously for 3 hours to obtain the modified silane papermaking w...

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
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of chemical engineering, in particular to a preparation method of a modified silane papermaking wastewater defoaming agent. The preparation method comprises the following steps of firstly, synthesizing trifluoropropyl-containing fluoroalkyl modified siloxane, and then reacting with semicarbazide modified organic silicon and white carbon black under the action ofa catalyst to carry out hydrophobic modification on the surface of the white carbon black. The obtained defoaming agent has good defoaming and foam inhibition effects on black liquor generated in thepapermaking and pulping process with high temperature and high alkali content at the same time; by using the defoaming agent, the pulp washing effect can be improved, the water consumption is reduced,the energy is saved, the environment is protected, and the defoaming agent can be applied to each link of pulp production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing a modified silane defoamer for papermaking wastewater. Background technique [0002] In industrial production processes, excessive foam can cause serious problems, such as paper production, food processing, fabric dyeing and finishing, pharmaceutical food fermentation, sewage treatment and crude oil processing, etc. Therefore defoamers are widely used to eliminate unwanted foam. [0003] CN110180223A discloses a preparation method of a siloxane defoamer for black liquor, which belongs to the field of chemical engineering, and aims at the problem that the water solubility of the existing defoamer affects the effect of the defoamer, the following scheme is now proposed, which includes the following steps : S1, prepare raw materials, including the following raw materials in parts by weight: 12 to 28 parts of organic wax, 68 to 88 parts of hydroxyl-terminated ...

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): B01D19/04
CPCB01D19/0409
Inventor 王美珍
Owner 瑞普环保新材料(广州)有限公司
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