CN1443721A - Method for preparing concrete water-reducing agent by utilizing paper-making pulping reaction - Google Patents
Method for preparing concrete water-reducing agent by utilizing paper-making pulping reaction Download PDFInfo
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- CN1443721A CN1443721A CN 02104159 CN02104159A CN1443721A CN 1443721 A CN1443721 A CN 1443721A CN 02104159 CN02104159 CN 02104159 CN 02104159 A CN02104159 A CN 02104159A CN 1443721 A CN1443721 A CN 1443721A
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Abstract
The method for preparing concrete water-reducing agent by utilizing paper-making pulping reaction is characterized by that it uses 1000 weight portions of fibre raw material, 2000-4000 weight portions of reaction liquor, 10-180 weight portions of sodium hydroxide, 40-320 weight portions of sodium sulfite, 0-30 weight portions of formaldehyde, 0-1 weight portions of anthraquinone and 0-40 weight portions of sodium sulfide, and makes then undergo the processes of reaction in digester, concentrating, modification and further drying so as to obtain the liquid or solid concrete water-reducing agent.
Description
The present invention relates to a kind of preparation method of cement water reducing agent, is a kind of in conjunction with papermaking enterprise environmental pollution improvement specifically, and utilizing the paper-making pulping reaction preparation is the cement water reducing agent of main component with xylogen and derivative thereof.
Along with concrete technology, particularly technology of high performance concrete develops rapidly, concrete admixture has become one of indispensable component of modern concrete engineering, mixes the serviceability that a small amount of admixture can improve fresh concrete, improves the physical and mechanical property and the weather resistance of maturing.Cement water reducing agent is one of the most frequently used admixture, and as far back as early 1930s, the U.S. just uses cellulose lye to make cement water reducing agent, to improve concrete workability, intensity and weather resistance.The main component of Lignins water reducer is lignosulfonic acid (calcium, sodium, a magnesium) salt, be that molecular weight is the natural high moleculer eompound of 1000-30000, these class water reducer raw material sources are abundant, stable performance, production cost is low, at home and abroad is extensive use of to have had the history of decades.Even to this day, the Lignins water reducer remains the ordinary water-reducing agent that application surface is the widest, turnout is maximum, cost is minimum in China's concrete field.With the xylogen ordinary water-reducing agent and carry out the modification of xylogen water reducer, become and saved cement, improve the important means of concrete engineering quality and improve the important component of other concrete admixture performances, and can reduce the concrete construction expense, be one of important channel of Future Development cement water reducing agent.
At present, the Lignins water reducer mainly contains two kinds and prepares approach, and a kind of is to utilize black liquor modified production water reducer; Another kind is to extract earlier xylogen to carry out modification production water reducer again from black liquor.These two kinds of methods all are difficult to overcome complicated process of preparation, the higher drawback of production cost, the objective of the invention is the preparation and the paper-making pulping reaction of cement water reducing agent are combined, make full use of papermaking enterprise current production devices and technology, produce that a kind of production cost is low, the cement water reducing agent of excellent property, make papermaking enterprise when solving the black liquor pollution problem, obtain certain economic benefits.
The objective of the invention is to realize by the following method: a kind of method of utilizing paper-making pulping reaction to prepare cement water reducing agent that the present invention relates to comprises chemical reaction, evaporation concentration, modification and dry four steps.Main chemical reactions is carried out in pulping digestion process, and the component and the component concentration that participate in reaction are as follows:
Fibrous material 1000 weight parts
Reaction solution 2000-4000 weight part
Sodium hydroxide 10-180 weight part
S-WAT 40-320 weight part
Formaldehyde 0-30 weight part
Anthraquinone 0-1 weight part
Sodium sulphite 0-40 weight part
Reaction conditions is maximum temperature 120-180 ℃, and the heating-up time is 120-240 minute, and soaking time 30-120 minute, the reaction back was separated the solid that obtains and is used for papermaking, and liquid is used to prepare cement water reducing agent.Fibrous material comprises raw material of papermaking fiber such as straw, wheat straw, bagasse, reed, Stem of Lovely Achnatherum, bamboo chip, wood chip.Reaction solution is allocated after xylogen is extracted in acidifying by black liquid and is obtained, and the S-WAT content of reaction solution is the 20-80 grams per liter, and sodium hydrate content is the 2-20 grams per liter.
Separate the solid that obtains after reaction ends and be used for papermaking, liquid evaporation is concentrated into 30-40% concentration, add the tributyl phosphate of concentrated solution solid substance 1-2% or propyl carbinol and (or) and other surfactant compound, make liquid product of the present invention, or drying promptly makes powdery product of the present invention again.
The present invention has following outstanding advantage and effect:
1. the present invention creatively incorporates the preparation of modified lignin resin water reducer in the paper-making pulping cooking process, by optimizing the performance that the cooking reaction condition improves cement water reducing agent, simplify preparation technology, made full use of resource, solved the problem of environmental pollution of papermaking enterprise simultaneously effectively.
2. product synthetic of the present invention principal reaction is finished in the slurrying production process, and production technique is brief, and the slurrying production process provides the good condition of xylogen sulfonation reaction.Therefore, product of the present invention not only has good performance, and production cost is lower than the cement water reducing agent of other explained hereafter.
3. the water-reducing property of product of the present invention reaches the quality index of ordinary water-reducing agent among the 6B8076-1997, and part index number has reached the specification of quality of high efficiency water reducing agent.Table 1 has provided several main performance index of the product of the present invention that is made by embodiment 1.
The salient features test result of table 1 product water reducer of the present invention
| Test item | Standard (salable product) index | The high efficiency water reducing agent index | Detected result | |
| Water-reducing rate (%) | ????≥5 | ????≥10 | ????9.0 | |
| Time of coagulation poor (min) | Initial set | ????-90-+120 | ????90-+90 | ????+64 |
| Final set | ????-90-+120 | ????-90-+90 | ????+99 | |
| Compressive strength rate (%) | 3 days | ????≥110 | ????≥120 | ????143 |
| 7 days | ????≥110 | ????≥115 | ????123 | |
| 28 days | ????≥105 | ????≥110 | ????120 | |
The invention will be further described below in conjunction with embodiment:
Embodiment 1
Take by weighing over dry wheat straw 600 and restrain the steam cooker of packing into, add 1800 gram reaction solution (S-WAT 56.6 grams per liters, sodium hydroxide 5.2 grams per liters), 12.7 gram sodium hydroxide and 0.3 gram anthraquinone, steam cooker sealing back intensification is reacted, be warming up to 140 ℃ in 90 minutes, be warming up to 160 ℃ again in 60 minutes, insulation is 90 minutes under this temperature.The reaction back of ending is separated the liquid evaporation that obtains and is concentrated into 30-40% concentration, adds 4 gram tributyl phosphates and stirs fast that drying obtains cement water reducing agent after 5 minutes.
Embodiment 2
Take by weighing over dry bagasse 1000 and restrain the steam cooker of packing into, add 3000 gram reaction solution (S-WAT 48.7 grams per liters, sodium hydroxide 9.6 grams per liters), 13.3 gram sodium hydroxide, 49.1 gram S-WATs and 0.5 gram anthraquinone, steam cooker sealing back intensification is reacted, be warming up to 140 ℃ in 135 minutes, be warming up to 165 ℃ again in 45 minutes, insulation is 60 minutes under this temperature.The reaction back of ending is separated the liquid evaporation that obtains and is concentrated into 30-40% concentration, adds 8 gram propyl carbinols and stirs fast that drying obtains cement water reducing agent after 5 minutes.
Embodiment 3
Take by weighing over dry bamboo chip 900 and restrain the steam cooker of packing into, add 2550 gram reaction solution (S-WAT 45.0 grams per liters, sodium hydroxide 4.8 grams per liters), 130.2 gram sodium hydroxide and 22.4 gram sodium sulphite, steam cooker sealing back intensification is reacted, be warming up to 140 ℃ in 150 minutes, be warming up to 165 ℃ again in 30 minutes, insulation is 90 minutes under this temperature.The reaction back of ending is separated the liquid evaporation that obtains and is concentrated into 30-40% concentration, adds 5 gram tributyl phosphates and stirs fast that drying obtains cement water reducing agent after 5 minutes.
Claims (4)
1. a method of utilizing paper-making pulping reaction to prepare cement water reducing agent comprises chemical reaction, evaporation concentration, modification and dry four steps, it is characterized in that chemical reaction carries out in pulping digestion process, and the component and the component concentration that participate in reaction are:
Fibrous material 1000 weight parts
Reaction solution 2000-4000 weight part
Sodium hydroxide 10-180 weight part
S-WAT 40-320 weight part
Formaldehyde 0-30 weight part
Anthraquinone 0-1 weight part
Sodium sulphite 0-40 weight part,
Reaction conditions is maximum temperature 120-180 ℃, and heating-up time 120-240 minute, soaking time 30-120 minute, the reaction back was separated the solid that obtains and is used for papermaking, and liquid is used to prepare cement water reducing agent.
2. the method for claim 1 is characterized in that used fibrous material comprises raw material of papermaking fiber such as straw, wheat straw, bagasse, reed, Stem of Lovely Achnatherum, bamboo chip, wood chip.
3. the method for claim 1 is characterized in that used reaction solution is modulated after xylogen is extracted in acidifying by black liquid to obtain that the S-WAT content of reaction solution is the 20-80 grams per liter, and sodium hydrate content is the 2-20 grams per liter.
4. the method for claim 1, it is characterized in that the cement water reducing agent method of modifying be add the tributyl phosphate of 1-2 ‰ or propyl carbinol and (or) and other surfactant compound prepare the modified concrete water reducer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 02104159 CN1443721A (en) | 2002-03-13 | 2002-03-13 | Method for preparing concrete water-reducing agent by utilizing paper-making pulping reaction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 02104159 CN1443721A (en) | 2002-03-13 | 2002-03-13 | Method for preparing concrete water-reducing agent by utilizing paper-making pulping reaction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140173A (en) * | 2010-12-28 | 2011-08-03 | 新疆天宏纸业股份有限公司 | Method for producing sodium lignin sulfonate by using black liquor from pulping of reed containing sodium sulfite |
| CN101745986B (en) * | 2008-12-22 | 2012-05-30 | 财团法人工业技术研究院 | Composite material of paper slag sludge and inorganic polymers and the preparation method thereof |
| CN108129054A (en) * | 2017-04-27 | 2018-06-08 | 钟建军 | A kind of natural lignin's sulfonate sodium water-reducing agent for building |
| CN115976865A (en) * | 2021-10-14 | 2023-04-18 | 中国科学院大连化学物理研究所 | Method for preparing lignocellulose unbleached pulp and co-producing lignosulfonate by chemical method |
-
2002
- 2002-03-13 CN CN 02104159 patent/CN1443721A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745986B (en) * | 2008-12-22 | 2012-05-30 | 财团法人工业技术研究院 | Composite material of paper slag sludge and inorganic polymers and the preparation method thereof |
| CN102140173A (en) * | 2010-12-28 | 2011-08-03 | 新疆天宏纸业股份有限公司 | Method for producing sodium lignin sulfonate by using black liquor from pulping of reed containing sodium sulfite |
| CN102140173B (en) * | 2010-12-28 | 2013-10-30 | 新疆天宏纸业股份有限公司 | Method for producing sodium lignin sulfonate by using black liquor from pulping of reed containing sodium sulfite |
| CN108129054A (en) * | 2017-04-27 | 2018-06-08 | 钟建军 | A kind of natural lignin's sulfonate sodium water-reducing agent for building |
| CN115976865A (en) * | 2021-10-14 | 2023-04-18 | 中国科学院大连化学物理研究所 | Method for preparing lignocellulose unbleached pulp and co-producing lignosulfonate by chemical method |
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