CN110655628A - Synthetic method of environment-friendly furan resin for cast iron - Google Patents
Synthetic method of environment-friendly furan resin for cast iron Download PDFInfo
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- CN110655628A CN110655628A CN201911078448.4A CN201911078448A CN110655628A CN 110655628 A CN110655628 A CN 110655628A CN 201911078448 A CN201911078448 A CN 201911078448A CN 110655628 A CN110655628 A CN 110655628A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/04—Chemically modified polycondensates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/224—Furan polymers
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mold Materials And Core Materials (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
The invention provides a method for synthesizing environment-friendly furan resin for cast iron, and relates to the technical field of cast iron resin synthesis. The environment-friendly furan resin for cast iron comprises the following components in parts by weight: 40-50 parts of furfuryl alcohol, 10-20 parts of urea, 12-24 parts of formaldehyde, 8-10 parts of ethanol, 10-14 parts of xylitol mother liquor and 1-2 parts of modifier, and the synthesis steps are as follows: 1) preparing furfuryl alcohol, urea, formaldehyde, ethanol, xylitol mother liquor and a modifier according to the weight part ratio; 2) adding one third of the total amount of furfuryl alcohol into a reaction kettle, adding ethanol, xylitol mother liquor and a modifier into the reaction kettle, simultaneously adding deionized water into the reaction kettle, starting a stirring device in the reaction kettle to stir, adjusting the pH value to 8-10 by using sodium hydroxide as a catalyst, and heating by using steam. By using ethanol and xylitol mother liquor to replace part of sugar alcohol, the use amount of the sugar alcohol in the synthesis process is reduced, so that the production cost and the energy consumption are effectively reduced.
Description
Technical Field
The invention relates to the technical field of cast iron resin synthesis, in particular to a method for synthesizing environment-friendly furan resin for cast iron.
Background
Furan resin is a general name of a class of polymers prepared by taking furfural as a basic raw material, furan rings are contained in macromolecules of the furan resin, and the furan resin has attracted attention for a long time due to the advantages of outstanding corrosion resistance and heat resistance, wide raw material source, simple production process and the like, but the application of the furan resin in the field of corrosion prevention is limited to a great extent due to the defects of high brittleness, poor caking property, poor construction process and the like of the furan resin for a long time, and the application range of the furan resin is only limited to the fields of daub, terrace, impregnated graphite and the like. After the middle 70 s, the furan resin was greatly developed in the field of corrosion prevention due to the breakthrough of synthesis technology and catalyst application technology, and was used for manufacturing corrosion-resistant glass fiber reinforced plastic. At present, the application amount of the foreign furan resin in the anticorrosion field exceeds the amount of the phenolic resin used in the prior art, and the furan resin plays a great role particularly in some environments with high temperature and strong corrosivity.
Sugar alcohol is the most basic raw material for manufacturing furan resin, and is derived from agricultural and sideline products, such as cottonseed hulls, rice hulls, corncobs, cornstalks and the like, but the sugar alcohol used for synthesizing the furan resin in the prior art is more, so that the production cost and the energy consumption are improved, and a large amount of treating agents are required to treat when the wastewater is discharged due to the higher content of free formaldehyde, so that the synthesis cost of enterprises is further improved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for synthesizing environment-friendly furan resin for cast iron, which solves the problems that the sugar alcohol used for synthesizing furan resin in the prior art is more, the production cost and the energy consumption are improved, and a large amount of treating agent is required for treatment when wastewater is discharged due to more free formaldehyde content, so that the enterprise synthesis cost is further improved.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the environment-friendly synthetic method of furan resin for cast iron comprises the following components in parts by weight: 40-50 parts of furfuryl alcohol, 10-20 parts of urea, 12-24 parts of formaldehyde, 8-10 parts of ethanol, 10-14 parts of xylitol mother liquor and 1-2 parts of modifier;
the synthetic method of the furan resin comprises the following steps:
1) preparing furfuryl alcohol, urea, formaldehyde, ethanol, xylitol mother liquor and a modifier according to the weight part ratio;
2) adding one third of the total amount of furfuryl alcohol into a reaction kettle, adding ethanol, xylitol mother liquor and a modifier into the reaction kettle, adding deionized water into the reaction kettle, starting a stirring device in the reaction kettle to stir, adjusting the pH value to 8-10 by using sodium hydroxide as a catalyst, and heating the reaction kettle by using steam;
3) after stirring in the reaction kettle for 10-20min, closing steam, cooling the reaction kettle to 50-60 ℃, adding the residual furfuryl alcohol into the reaction kettle, continuously stirring, adding glacial acetic acid into the reaction kettle while stirring to adjust the pH value in the reaction kettle to 6-7, and stopping stirring after 5-15 min;
4) adding urea and formaldehyde into the reaction kettle, uniformly and continuously heating the reaction kettle by using steam, heating the reaction kettle to 120 ℃ within 100-;
5) and after heat preservation treatment, carrying out vacuum dehydration treatment on the reaction kettle, measuring the pH value in the reaction kettle after dehydration, breaking vacuum after measurement is qualified, closing steam and cooling the reaction kettle to below 50 ℃ by using cold water.
Preferably, the modifier is one of lauric acid monoglyceride, alkylphenol polyoxyethylene and sorbitan monooleate.
Preferably, the furan resin comprises the following components in parts by weight: 40 parts of furfuryl alcohol, 10 parts of urea, 12 parts of formaldehyde, 8 parts of ethanol, 10 parts of xylitol mother liquor and 1 part of modifier.
Preferably, the furan resin comprises the following components in parts by weight: 45 parts of furfuryl alcohol, 15 parts of urea, 18 parts of formaldehyde, 9 parts of ethanol, 12 parts of xylitol mother liquor and 1.5 parts of modifier.
Preferably, the furan resin comprises the following components in parts by weight: 50 parts of furfuryl alcohol, 20 parts of urea, 24 parts of formaldehyde, 10 parts of ethanol, 14 parts of xylitol mother liquor and 2 parts of modifier.
Preferably, the pressure in the reaction kettle is controlled to be 0.05-0.1MPa during the vacuum dehydration treatment in the step 5.
(III) advantageous effects
The invention provides a synthetic method of environment-friendly furan resin for cast iron. The method has the following beneficial effects:
1. according to the environment-friendly furan resin synthesis method for cast iron, ethanol and xylitol mother liquor are used for replacing part of sugar alcohol, so that the use amount of the sugar alcohol in the synthesis process is reduced, and the production cost and the energy consumption are effectively reduced.
2. The environment-friendly furan resin synthesis method for cast iron greatly reduces the content of free formaldehyde, effectively reduces the pollution degree, and reduces the usage amount of the treating agent, thereby further reducing the synthesis cost of enterprises.
3. According to the synthetic method of the environment-friendly furan resin for cast iron, the prepared furan resin is easy to mix sand, and the molding sand has good fluidity; the specific strength is high, the addition of resin can be reduced, and the casting quality is improved.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a method for synthesizing environment-friendly furan resin for cast iron, which comprises the following components in parts by weight: 40 parts of furfuryl alcohol, 10 parts of urea, 12 parts of formaldehyde, 8 parts of ethanol, 10 parts of xylitol mother liquor and 1 part of modifier;
the synthetic method of the furan resin comprises the following steps:
1) preparing furfuryl alcohol, urea, formaldehyde, ethanol, xylitol mother liquor and a modifier according to the weight part ratio, wherein the modifier is one of lauric acid monoglyceride, alkylphenol ethoxylates and sorbitan monooleate, and the modifier can enable the ethanol and the xylitol mother liquor to be stably combined;
2) adding one third of the total amount of furfuryl alcohol into a reaction kettle, adding ethanol, xylitol mother liquor and a modifier into the reaction kettle, adding deionized water into the reaction kettle, starting a stirring device in the reaction kettle to stir, adjusting the pH value to 8-10 by using sodium hydroxide as a catalyst, and heating the reaction kettle by using steam;
3) after stirring in the reaction kettle for 10-20min, closing steam, cooling the reaction kettle to 50-60 ℃, adding the residual furfuryl alcohol into the reaction kettle, continuously stirring, adding glacial acetic acid into the reaction kettle while stirring to adjust the pH value in the reaction kettle to 6-7, and stopping stirring after 5-15 min;
4) adding urea and formaldehyde into the reaction kettle, uniformly and continuously heating the reaction kettle by using steam, heating the reaction kettle to 120 ℃ within 100-;
5) and after heat preservation treatment, carrying out vacuum dehydration treatment on the reaction kettle, controlling the pressure in the reaction kettle to be 0.05-0.1MPa during the vacuum dehydration treatment, measuring the pH value in the reaction kettle after dehydration is finished, breaking vacuum after the pH value is measured to be qualified, closing steam and cooling the reaction kettle to be below 50 ℃ by using cold water.
Example two:
the embodiment of the invention provides a method for synthesizing environment-friendly furan resin for cast iron, which comprises the following components in parts by weight: 45 parts of furfuryl alcohol, 15 parts of urea, 18 parts of formaldehyde, 9 parts of ethanol, 12 parts of xylitol mother liquor and 1.5 parts of modifier;
the synthetic method of the furan resin comprises the following steps:
1) preparing furfuryl alcohol, urea, formaldehyde, ethanol, xylitol mother liquor and a modifier according to the weight part ratio, wherein the modifier is one of lauric acid monoglyceride, alkylphenol polyoxyethylene and sorbitan monooleate;
2) adding one third of the total amount of furfuryl alcohol into a reaction kettle, adding ethanol, xylitol mother liquor and a modifier into the reaction kettle, adding deionized water into the reaction kettle, starting a stirring device in the reaction kettle to stir, adjusting the pH value to 8-10 by using sodium hydroxide as a catalyst, and heating the reaction kettle by using steam;
3) after stirring in the reaction kettle for 10-20min, closing steam, cooling the reaction kettle to 50-60 ℃, adding the residual furfuryl alcohol into the reaction kettle, continuously stirring, adding glacial acetic acid into the reaction kettle while stirring to adjust the pH value in the reaction kettle to 6-7, and stopping stirring after 5-15 min;
4) adding urea and formaldehyde into the reaction kettle, uniformly and continuously heating the reaction kettle by using steam, heating the reaction kettle to 120 ℃ within 100-;
5) and after heat preservation treatment, carrying out vacuum dehydration treatment on the reaction kettle, controlling the pressure in the reaction kettle to be 0.05-0.1MPa during the vacuum dehydration treatment, measuring the pH value in the reaction kettle after dehydration is finished, breaking vacuum after the pH value is measured to be qualified, closing steam and cooling the reaction kettle to be below 50 ℃ by using cold water.
Example three:
the embodiment of the invention provides a method for synthesizing environment-friendly furan resin for cast iron, which comprises the following components in parts by weight: 50 parts of furfuryl alcohol, 20 parts of urea, 24 parts of formaldehyde, 10 parts of ethanol, 14 parts of xylitol mother liquor and 2 parts of modifier;
the synthetic method of the furan resin comprises the following steps:
1) preparing furfuryl alcohol, urea, formaldehyde, ethanol, xylitol mother liquor and a modifier according to the weight part ratio, wherein the modifier is one of lauric acid monoglyceride, alkylphenol polyoxyethylene and sorbitan monooleate;
2) adding one third of the total amount of furfuryl alcohol into a reaction kettle, adding ethanol, xylitol mother liquor and a modifier into the reaction kettle, adding deionized water into the reaction kettle, starting a stirring device in the reaction kettle to stir, adjusting the pH value to 8-10 by using sodium hydroxide as a catalyst, and heating the reaction kettle by using steam;
3) after stirring in the reaction kettle for 10-20min, closing steam, cooling the reaction kettle to 50-60 ℃, adding the residual furfuryl alcohol into the reaction kettle, continuously stirring, adding glacial acetic acid into the reaction kettle while stirring to adjust the pH value in the reaction kettle to 6-7, and stopping stirring after 5-15 min;
4) adding urea and formaldehyde into the reaction kettle, uniformly and continuously heating the reaction kettle by using steam, heating the reaction kettle to 120 ℃ within 100-;
5) and after heat preservation treatment, carrying out vacuum dehydration treatment on the reaction kettle, controlling the pressure in the reaction kettle to be 0.05-0.1MPa during the vacuum dehydration treatment, measuring the pH value in the reaction kettle after dehydration is finished, breaking vacuum after the pH value is measured to be qualified, closing steam and cooling the reaction kettle to be below 50 ℃ by using cold water.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A synthetic method of environment-friendly furan resin for cast iron is characterized by comprising the following steps: the furan resin comprises the following components in parts by weight: 40-50 parts of furfuryl alcohol, 10-20 parts of urea, 12-24 parts of formaldehyde, 8-10 parts of ethanol, 10-14 parts of xylitol mother liquor and 1-2 parts of modifier;
the synthetic method of the furan resin comprises the following steps:
1) preparing furfuryl alcohol, urea, formaldehyde, ethanol, xylitol mother liquor and a modifier according to the weight part ratio;
2) adding one third of the total amount of furfuryl alcohol into a reaction kettle, adding ethanol, xylitol mother liquor and a modifier into the reaction kettle, adding deionized water into the reaction kettle, starting a stirring device in the reaction kettle to stir, adjusting the pH value to 8-10 by using sodium hydroxide as a catalyst, and heating the reaction kettle by using steam;
3) after stirring in the reaction kettle for 10-20min, closing steam, cooling the reaction kettle to 50-60 ℃, adding the residual furfuryl alcohol into the reaction kettle, continuously stirring, adding glacial acetic acid into the reaction kettle while stirring to adjust the pH value in the reaction kettle to 6-7, and stopping stirring after 5-15 min;
4) adding urea and formaldehyde into the reaction kettle, uniformly and continuously heating the reaction kettle by using steam, heating the reaction kettle to 120 ℃ within 100-;
5) and after heat preservation treatment, carrying out vacuum dehydration treatment on the reaction kettle, measuring the pH value in the reaction kettle after dehydration, breaking vacuum after measurement is qualified, closing steam and cooling the reaction kettle to below 50 ℃ by using cold water.
2. The method for synthesizing the furan resin for the environment-friendly cast iron as claimed in claim 1, wherein the method comprises the following steps: the modifier is one of lauric acid monoglyceride, alkylphenol polyoxyethylene ether and sorbitan monooleate.
3. The method for synthesizing the furan resin for the environment-friendly cast iron as claimed in claim 1, wherein the method comprises the following steps: the furan resin comprises the following components in parts by weight: 40 parts of furfuryl alcohol, 10 parts of urea, 12 parts of formaldehyde, 8 parts of ethanol, 10 parts of xylitol mother liquor and 1 part of modifier.
4. The method for synthesizing the furan resin for the environment-friendly cast iron as claimed in claim 1, wherein the method comprises the following steps: the furan resin comprises the following components in parts by weight: 45 parts of furfuryl alcohol, 15 parts of urea, 18 parts of formaldehyde, 9 parts of ethanol, 12 parts of xylitol mother liquor and 1.5 parts of modifier.
5. The method for synthesizing the furan resin for the environment-friendly cast iron as claimed in claim 1, wherein the method comprises the following steps: the furan resin comprises the following components in parts by weight: 50 parts of furfuryl alcohol, 20 parts of urea, 24 parts of formaldehyde, 10 parts of ethanol, 14 parts of xylitol mother liquor and 2 parts of modifier.
6. The method for synthesizing the furan resin for the environment-friendly cast iron as claimed in claim 1, wherein the method comprises the following steps: and controlling the pressure in the reaction kettle to be 0.05-0.1MPa during the vacuum dehydration treatment in the step 5.
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| CN201911078448.4A CN110655628A (en) | 2019-11-06 | 2019-11-06 | Synthetic method of environment-friendly furan resin for cast iron |
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| CN201911078448.4A CN110655628A (en) | 2019-11-06 | 2019-11-06 | Synthetic method of environment-friendly furan resin for cast iron |
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