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

Preparation method and application of a straw-based ester ether sulfonated composite water reducer

A technology of composite water reducer and water reducer, which is applied in the field of preparation of ester ether sulfonated composite water reducer, can solve the problem of not proposing the idea and idea of ​​industrialization test, not proposing the degree of fine crushing of straw crushing, and the inability of straw raw materials Make full use of other problems to achieve the effect of anti-sedimentation industrialization, increased ratio and reactive area, and low cost

Active Publication Date: 2021-08-27
TIANSHUI NORMAL UNIV
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water reducing agent prepared by this method has a low water reducing rate and can only be used as the most common water reducing agent
Chinese patent CN 101759856 B "Preparation method of sodium lignin sulfonate water reducer", using corn cob, corn cob acid hydrolysis residue, bagasse or corn stalks as raw materials through alkali boiling black liquor, after coarse filtration, ultrafiltration Membrane concentration, sulfonation and spray drying to prepare sodium lignosulfonate superplasticizer with low water content. This process has no pollution to the environment, simple process and low cost, but straw raw materials cannot be fully utilized and the waste is serious
However, the results of these two studies are just laboratory shake-flask experiments. One is that the degree and method of crushing the straw are not proposed, only the straw is crushed. Bringing in excess chloride ions and sulfate ions will affect the performance of the water reducer. Third, there is no idea and idea for industrial testing, and there is still a long way to go before industrialization.

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 and application of a straw-based ester ether sulfonated composite water reducer
  • Preparation method and application of a straw-based ester ether sulfonated composite water reducer
  • Preparation method and application of a straw-based ester ether sulfonated composite water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] A method for preparing a straw-modified ester-ether sulfonated composite water reducer, the specific steps are as follows:

[0136] S1: Straw raw material pretreatment, the specific process is as follows:

[0137] The first step: primary crushing of straw raw materials, cleaning, drying, fine crushing, micro-crushing pretreatment:

[0138] After a certain amount of raw material straw bales 3 are naturally air-dried, they are first crushed into straw sections of about 1~3 cm by the straw primary crushing device 2; Clean the mud, sand and other impurities in it; after that, it will be preliminarily dried by the pre-drying device 6, and then the material will fall into the straw primary crushed material lifting conveyor belt 7 and be further lifted and transported to the screw dryer 8 for secondary drying. Make the moisture content of the stalks below 10% calculated by mass percentage, enter the cyclone separator 9 for gas-solid separation, and the stalks fall into the 1#...

Embodiment 2

[0155] A method for preparing a straw-modified ester-ether sulfonated composite water reducer, the specific steps are as follows:

[0156] S1: Straw raw material pretreatment, the specific process is as follows:

[0157] The first step: primary crushing, cleaning, drying, fine crushing and fine crushing of straw raw materials. Process is completely with embodiment 1;

[0158] The second step: straw powder hydrolysis pretreatment. Process is completely the same as embodiment 1, and difference is that hydrolysis process does not need heating, the hydrolysis catalytic acid that adds and hydrolysis time are different, be embodied in:

[0159] Described lubricating additive is stearic acid, and the solid agent ratio of straw and stearic acid is 1000 g: 10 ml.

[0160] The main catalytic acid for hydrolysis is a dicarboxylic acid represented by itaconic acid, and the solid-acid ratio of straw to itaconic acid is 1000 g: 20 ml;

[0161] Described hydrolysis-promoting acid is the ...

Embodiment 3

[0174] A method for preparing a straw-modified ester-ether sulfonated composite water reducer, the specific steps are as follows:

[0175] S1: Straw raw material pretreatment, the specific process is as follows:

[0176] The first step: primary crushing, cleaning, drying, fine crushing and fine crushing of straw raw materials. Process is completely with embodiment 1;

[0177] The second step: straw powder hydrolysis pretreatment. The process is completely the same as in Example 1, the difference is that the hydrolysis catalytic acid added is different, which is embodied in: the lubricating additive is a mixture of stearic acid and oleic acid each accounting for 1 / 2, and the solid agent ratio of straw and lubricating additive is 1000 g: 10 ml. The main catalytic acid for hydrolysis is polycarboxylic acid represented by citric acid, and the solid acid ratio of straw and citric acid is 1000 g: 15 ml; Sulfuric acid and dilute hydrochloric acid each account for 1 / 2 of the mixed...

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
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method and application of a straw-modified ester ether sulfonated composite water-reducer. The water-reducer is made from crop straw hydrolyzed powder through primary oxidation-sulfonated esterification of straw lignocellulose Modification, secondary oxidation-sulfonated esterification modification and primary methylolation-etherification modification. The straw hydrolyzed powder is obtained by hydrolyzing the straw powder after primary crushing, washing, drying, finely crushing and finely crushing pretreatment of crop straw. In the present invention, the raw materials of crop straws are pulverized and hydrolyzed for pretreatment, and straw lignin and cellulose are subjected to step-by-step sulfonation modification to form sulfonate esters, and then lignocellulose etherification modification is carried out to obtain straw-based ester ethers. The sulfonated composite water reducer has improved the low water reducing rate of 10-15% of the straw-based water reducer, and the obtained water reducer can be directly used in the situation where the water reducing rate is about 25% and the retarding time is moderate , the process is continuous and compact, easy to operate, low in cost, anti-sedimentation and easy to industrialize.

Description

technical field [0001] The invention relates to the preparation of a biomass-based water reducer by modifying crop straws, in particular to a preparation method and application of an ester ether sulfonated composite water reducer based on straw modification. Background technique [0002] At present, with the increasing shortage of petrochemical raw materials required for the preparation of a new generation of high-performance petroleum-based polycarboxylate water reducers for concrete admixtures, the outstanding problem of rising prices has restricted the new generation of high-performance polycarboxylate water reducers. The rapid development of additives has led to rising production costs, making polycarboxylate superplasticizers that have higher performance advantages than naphthalene-based, aliphatic-based, sulfamate-based, and lignin-based water-reducing agents unable to be used in the market. The vigorous promotion and application of the construction industry. Scholars...

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 Patents(China)
IPC IPC(8): C04B24/18C08H8/00C04B103/30
CPCC04B40/0039C04B2103/302C08H8/00C04B24/18C04B24/16
Inventor 章德玉张惠琴张建斌刘流王鹏刘岿司长代王小芳刘新文雷新有吕玲玲李志锋郭峰赵爱英朱元成左国防唐慧安
Owner TIANSHUI NORMAL UNIV
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