CN102875756A - Method for producing self-hardening furan resin for casting with pentose compound instead of furfuryl alcohol - Google Patents
Method for producing self-hardening furan resin for casting with pentose compound instead of furfuryl alcohol Download PDFInfo
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Abstract
The invention relates to a method for producing self-hardening furan resin for casting, in particular to a method for producing self-hardening furan resin for casting by taking a pentose compound as a raw material to substitute for part of furfuryl alcohol. According to the method, 5-35 parts of pentose compound and 50-60 parts of furfuryl alcohol are used as raw materials combination to replace a large quantity of furfuryl alcohol required in the prior art, so that the using quantity of the furfuryl alcohol is reduced. Compared with the traditional method for producing furan resin, the method provided by the invention has the advantages that production cost is lowered, harm to environments is reduced, and the method is favorable to large scale production; and meanwhile, in the preparation process of the furan resin, an aldehyde and polyhydroxy structure in the molecule of the pentose compound is utilized to increase resin curing crosslinking points and facilitate the formation of a reticular structure in the curing process of the resin, the strength of resin sand is improved, and the content of free formaldehyde can be effectively reduced.
Description
Technical field
The present invention relates to a kind of preparation method who casts with self-hardening furan resin, be specifically related to a kind of preparation method who casts take pentose compounds Partial Replacement furfuryl alcohol as raw material production with self-hardening furan resin.
Background technology
Furane resin refer to have the general name of furfuryl alcohol and the resene that furfural is made raw material production of furan nucleus, and it is cured as insoluble and molten solid substance under the strong acid effect, and kind has furfuryl alcohol resin, furfuryl resin, acetone-furfural resin, chaff ketone--formaldehyde resin etc.Furfuryl alcohol resin is that main body and formaldehyde condensation polymer form (modified product has added again urea) by furfuryl alcohol, outward appearance is that Vandyke brown is to the liquid or solid of black, thermotolerance and water tolerance are all fine, chemical resistance is extremely strong, acid, alkali, salt and organic solution are had good resistibility, are good sanitass.Casting is a kind of of furfuryl alcohol resin with self-hardening furan resin, refer at room temperature can make sand mold (core) sclerosis by acid catalysis, and in structure, contain furan nucleus, have furfuryl alcohol, formaldehyde, urea and or the synthetic thermosetting resin such as phenol, be generally faint yellow to brown transparent or semitransparent uniform liquid.Casting is high with self-hardening furan resin intensity, is the good binding agents such as timber, rubber, metal and pottery, also can be used for producing coating.Casting is to make core binder in the casting technique of mechanical industry with an important use of self-hardening resin, is specially adapted to large-scale, large batch of machinofacture, such as the production of automobile military project, oil engine, diesel engine, sewing machine etc.When being used for the binding agent of casting sand core, casting has following characteristics with self-hardening resin: curing speed is fast, normal temperature strength is low, decomposition temperature is high; According to the carbon content of different foundry goods, can select the resin of different nitrogen contents; Get angry little, hot strength is high, thermal expansivity is moderate, fragility is large, pore tendency is little, water absorbability is large, is widely used as binding agent in industries such as timber, rubber, metal, potteries, in mechanical industry, also play an important role.Especially after adding is urea-modified, can require to produce according to difference the furfuryl alcohol resin of different nitrogen contents, to satisfy the requirement of cast steel, cast iron and other non-ferrous metals casting techniques.
In the prior art, general conventional cast with the synthesis technique of self-hardening furan resin is: add formaldehyde (15-25 part) in reactor, and start stirring for some time, then add part urea (5-8 part) dissolving, and regulate pH and under alkaline condition, react certain hour; Adding a part of furfuryl alcohol (15-20 part) according to the requirement of the nitrogen content of required production resin again reacts; At first regulate pH behind the adding furfuryl alcohol and under alkaline condition, react for some time, then adjust again the pH value of material system and react for acidity; Add subsequently remaining part urea (1-3 part) to reduce the free formaldehyde in the resin, again whole material system is dewatered under vacuum condition, and add the furfuryl alcohol (40-75 part) of remaining part in the system after the dehydration, and stir, namely get required casting self-hardening furan resin product.
In recent years, fast development along with China's foundry industry, casting a large amount of employings of self-hardening furan resin sand technique, so that its demand progressively increases, although its good casting property, but the price of raw material furfuryl alcohol remained on very high level in these several years always, and then caused the price of the furane resin produced also relatively high, and certain restriction inhibition has been played in this widespread use for furane resin.At present, seek a kind of cheap furfuryl alcohol alternative materials production casting and become the foundry industry problem demanding prompt solution with self-hardening furan resin.
Summary of the invention
For this reason, technical problem to be solved by this invention is in the prior art that casting causes the higher problem of production cost with a large amount of furfuryl alcohol of preparation need of production consumption of self-hardening furan resin, and then provides a kind of and partly substitute furfuryl alcohol production with the pentose compounds and cast with self-hardening furan resin with the casting that reduces production costs self-hardening furan resin preparation method.
Second technical problem to be solved by this invention is to provide the more widely new method for preparing furane resin of a kind of raw material sources.
For solving the problems of the technologies described above, pentose compounds of the present invention substitutes furfuryl alcohol production casting with the method for self-hardening furan resin, comprises the steps:
(1) in reactor, add formaldehyde 15-25 part, reach 5-8 part urea and stir, and adjusting pH is that alkalescence is reacted;
(2) add 15-20 part furfuryl alcohol and react, and to adjust system pH be slightly acidic, 80-100 ℃ of reaction of control temperature of reaction;
(3) add 1-3 part urea in the reactant that again obtains in the step (2), and to adjust the material system pH be weakly alkaline, then 70-85 ℃ of control temperature of reaction be cooled to system 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters, and adds 5-35 part pentose compounds and 35-40 part furfuryl alcohol, stirs, and namely gets desired product;
Above umber is parts by weight.
Described pentose compounds comprises one or more the mixture in wood sugar, pectinose, Xylitol, lyxose, the ribose.
In the described step (1), adjusting pH is weakly alkaline, and preferably regulating pH is 8.0-10.0.
In the described step (2), adjusting pH is 2.5-5.5.
In the described step (3), adjusting pH is 7.5-9.5.
In the described step (4), described processed is carried out under vacuum condition.
In the described step (4), described processed is dewatered reactant to water ratio and is lower than 20%.
In the described step (1), described formaldehyde is 37% formaldehyde solution or polyoxymethylene solution.
In the described step (2), regulate pH as slightly acidic take dilute acid solns such as the sulfuric acid of 5-25%, hydrochloric acid, oxalic acid, sulfonic acid, take oxalic acid as best.
In described step (1) and (3), regulate pH as alkalescence take dilute acid solns such as sodium hydroxide, yellow soda ash, sodium bicarbonates, take sodium hydroxide as best.
The invention also discloses a kind of casting self-hardening furan resin that is prepared by aforesaid method.
Technique scheme of the present invention has the following advantages compared to existing technology, 1, of the present invention with the technique of pentose compounds replacement furfuryl alcohol production casting with self-hardening furan resin, with the cheap expensive furfuryl alcohol of pentose compounds Partial Replacement, thereby reduce the consumption of furfuryl alcohol, compare with the production of traditional furane resin, reduce production cost, and the hazardness of environment has been reduced, be conducive to scale operation; 2, technology utilization pentose compounds of the present invention is participated in the building-up reactions of furane resin directly, simplify elder generation and be cyclized into furfural by pentose, generate furfuryl alcohol by hydrogenation of furfural again, participate in the technique that reaction generates furane resin by furfuryl alcohol at last, saved production cost; 3, utilize in the technique of the present invention and contain aldehyde radical and poly-hydroxy structure in the pentose compounds molecule, in the process of preparation furane resin, increased the cross-linking set of resin solidification, be conducive to resin and in solidification process, form reticulated structure, improve the intensity of resin sand, in addition because pentose belongs to poly-hydroxy aldehyde, can also with free formaldehyde generation aldol reaction in the reaction system, and then unreacted formaldehyde consumed during urea-formaldehyde resin is synthetic, thereby had reduced the content of free formaldehyde; 4, the pentose compounds that directly extensively exists with occurring in nature of method of the present invention as raw material production casting use self-hardening furan resin, the synthetic more widely new way of a kind of raw material sources that provides of furane resin is provided; 5, production casting of the present invention is compared with product of the prior art with the prepared product of technique of self-hardening furan resin, and nitrogen content and free formaldehyde content all meet national standard, are applicable in the required technique.
Embodiment
Embodiment 1
Starting material form:
Formaldehyde 250Kg (25 parts), urea 100Kg(10 part), furfuryl alcohol 550Kg(55 part) and, wood sugar 350Kg(35 part).
Substitute furfuryl alcohol production casting with the method for self-hardening furan resin with the pentose compounds described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 25 parts in 37% formaldehyde, and 8 parts of urea stir, and after the urea dissolving, regulates pH 9.0-9.2 with sodium hydroxide solution and reacts 1h;
(2) add subsequently 20 parts of furfuryl alcohols and react, and adjust system pH as 2.5-3.5 take 10% sulphuric acid soln, 90-95 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 2 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 7.8-8.0 take sodium carbonate solution, control answers temperature 70-75 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently 35 parts of wood sugars and 35 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 1100Kg.
Embodiment 2
Starting material form:
Formaldehyde (concentration 37%) 200Kg(20 part), urea 110Kg(11 part), furfuryl alcohol 500 Kg(50 parts) and, mixture 300 Kg(30 parts of pectinose and Xylitol).
Substitute furfuryl alcohol production casting with the method for self-hardening furan resin with the pentose compounds described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 20 parts in 37% formaldehyde, and 8 parts of urea stir, and after the urea dissolving, regulates pH 9.2-9.6 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 15 parts of furfuryl alcohols and react, and adjust system pH as 4.0-4.5 take 20% hydrochloric acid soln, 95-100 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 3 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 8.0-8.2 take the yellow soda ash dilute solution, control answers temperature 75-80 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently mixture and 35 parts of furfuryl alcohols of 30 portions of pectinoses and Xylitol, stirs, and blowing namely gets about desired product 1050Kg.
Embodiment 3
Starting material form:
Polyoxymethylene solution (concentration 37%) 150Kg(15 part), urea 90Kg(9 part), furfuryl alcohol 550Kg(55 part) and, Xylitol 200 Kg(20 parts).
Substitute furfuryl alcohol production casting with the method for self-hardening furan resin with the pentose compounds described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 20 parts of 37% polyoxymethylene solution, and 6 parts of urea stir, and after the urea dissolving, regulates pH 9.6-10.0 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 15 parts of furfuryl alcohols and react, and adjust system pH as 4.8-5.0 take 25% oxalic acid solution, 85-90 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 3 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 7.5-8.5 take the yellow soda ash dilute solution, then 80-85 ℃ of reaction of control temperature of reaction be cooled to system 45-50 ℃ and stopped reaction after 1 hour;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently 20 parts of Xylitols and 40 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 960Kg.
Embodiment 4
Starting material form:
Formaldehyde (concentration 37%) 220Kg(22 part), urea 60Kg(6 part), furfuryl alcohol 600Kg(60 part) and, mixture 50 Kg(5 parts of lyxose and wood sugar).
Substitute furfuryl alcohol production casting with the method for self-hardening furan resin with the pentose compounds described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 22 parts in 37% formaldehyde, and 5 parts of urea stir, and after the urea dissolving, regulates pH 8.0-8.5 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 20 parts of furfuryl alcohols and react, and adjust system pH as 3.5-4.0 take 5% sulfonic acid solutions, 80-85 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 1 part of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 8.5-9.0 take dilute solution of sodium bicarbonate, control answers temperature 75-80 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently mixture and 40 parts of furfuryl alcohols of 5 portions of lyxoses and wood sugar, stirs, and blowing namely gets about desired product 900Kg.
Embodiment 5
Starting material form:
Formaldehyde (concentration 37%) 170Kg(17 part), urea 80Kg(8 part), furfuryl alcohol 560Kg(56 part) and, ribose 100Kg(10 part).
Substitute furfuryl alcohol production casting with the method for self-hardening furan resin with pentose described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 17 parts in 37% formaldehyde, and 6 parts of urea stir, and after the urea dissolving, regulates pH 8.5-9.0 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 18 parts of furfuryl alcohols and react, and adjust system pH as 4.0-4.2 take 25% oxalic acid solution, 90-95 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 2 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 7.8-8.0 take the yellow soda ash dilute solution, control answers temperature 75-80 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently 10 parts of ribose and 38 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 1000Kg.
Comparative Examples 1
Starting material form:
Formaldehyde (concentration 37%) 250Kg(25 part), urea 100Kg(10 part), furfuryl alcohol 900Kg(90 part).
Produce casting with the method for self-hardening furan resin with art methods described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 25 parts in 37% formaldehyde, and 8 parts of urea stir, and after the urea dissolving, regulates pH 9.0-9.2 with sodium hydroxide solution and reacts 1h;
(2) add subsequently 20 parts of furfuryl alcohols and react, and adjust system pH as 2.5-3.5 take 10% sulphuric acid soln, 90-95 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 2 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 7.8-8.0 take sodium carbonate solution, control answers temperature 70-75 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently remaining 70 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 1100Kg.
Comparative Examples 2
Starting material form:
Formaldehyde (concentration 37%) 200Kg(20 part), urea 110Kg(11 part), furfuryl alcohol 800Kg(80 part).
Produce casting with the method for self-hardening furan resin with art methods described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 20 parts in 37% formaldehyde, and 8 parts of urea stir, and after the urea dissolving, regulates pH 9.2-9.6 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 15 parts of furfuryl alcohols and react, and adjust system pH as 4.0-4.5 take 20% hydrochloric acid soln, 95-100 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 3 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 8.0-8.2 take the yellow soda ash dilute solution, control answers temperature 75-80 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently remaining 65 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 1050Kg.
Comparative Examples 3
Starting material form:
Polyoxymethylene solution (concentration 37%) 150Kg(15 part), urea 90Kg(9 part), furfuryl alcohol 750Kg(75 part).
Produce casting with the method for self-hardening furan resin with art methods described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 20 parts of 37% polyoxymethylene solution, and 6 parts of urea stir, and after the urea dissolving, regulates pH9.6-10.0 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 15 parts of furfuryl alcohols and react, and adjust system pH as 4.8-5.0 take 20% hydrochloric acid soln, 85-90 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 3 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 7.5-8.5 take the yellow soda ash dilute solution, control answers temperature 80-85 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently remaining 60 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 960Kg.
Comparative Examples 4
Starting material form:
Formaldehyde (concentration 37%) 220Kg(22 part), urea 60Kg(6 part), furfuryl alcohol 650Kg(65 part).
Produce casting with the method for self-hardening furan resin with art methods described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 22 parts in 37% formaldehyde, and 5 parts of urea stir, and after the urea dissolving, regulates pH 8.0-8.5 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 20 parts of furfuryl alcohols and react, and adjust system pH as 3.5-4.0 take 5% sulfonic acid solutions, 80-85 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 1 part of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 8.5-9.0 take the yellow soda ash dilute solution, control answers temperature 75-80 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently remaining 45 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 900Kg.
Comparative Examples 5
Starting material form:
Formaldehyde (concentration 37%) 170Kg(17 part), urea 80Kg(8 part), furfuryl alcohol 660Kg(66 part).
Produce casting with the method for self-hardening furan resin with art methods described in the present embodiment, comprise the steps:
(1) adding concentration in the reactor is 17 parts in 37% formaldehyde, and 6 parts of urea stir, and after the urea dissolving, regulates pH 8.5-9.0 and is warming up to 85 ℃ with dilute solution of sodium bicarbonate and react 1h;
(2) add subsequently 18 parts of furfuryl alcohols and react, and adjust system pH as 4.0-4.2 take 20% hydrochloric acid soln, 90-95 ℃ of reaction of control temperature of reaction 1.5h;
(3) add 2 parts of urea in the reactant that again obtains in the step (2), and adjust the material system pH as 7.8-8.0 take the yellow soda ash dilute solution, control answers temperature 75-80 ℃ of reaction after 1 hour, then system is cooled to 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters under vacuum condition to water ratio and is lower than 20%, adds subsequently remaining 48 parts of furfuryl alcohols, stirs, and blowing namely gets about desired product 1000Kg.
The index comparing result of above synthetic furane resin sees Table 1.
The analytical procedure of nitrogen content, free formaldehyde and intensity: press JB/T7526-2008 " casting self-hardening furan resin " and carry out.
The index determining result of table 1 embodiment 1-5 and comparative example 1-5
| Project | Nitrogen content (%) | Free formaldehyde (%) | The normal temperature tension is intensity (MPa) just | The whole intensity (MPa) of normal temperature tension |
| Embodiment 1 | 3.537 | 0.268 | 0.60 | 1.71 |
| Embodiment 2 | 3.513 | 0.271 | 0.56 | 1.65 |
| Embodiment 3 | 3.690 | 0.265 | 0.64 | 1.68 |
| Embodiment 4 | 3.491 | 0.266 | 0.68 | 1.75 |
| Embodiment 5 | 3.519 | 0.285 | 0.58 | 1.72 |
| Comparative Examples 1 | 3. 592 | 0.274 | 0.56 | 1.63 |
| Comparative Examples 2 | 3.560 | 0.219 | 0.60 | 1.59 |
| Comparative Examples 3 | 3.639 | 0.261 | 0.58 | 1.65 |
| Comparative Examples 4 | 3.513 | 0.280 | 0.62 | 1.60 |
| Comparative Examples 5 | 3.586 | 0.268 | 0.56 | 1.66 |
Can find out from the above results, compare with the furane resin that prior art prepares with the furane resin that obtain with the production of pentose compounds Partial Replacement furfuryl alcohol of the present invention, its nitrogen content performance, the first intensity of normal temperature tension and the whole intensity of normal temperature tension are all suitable with the prior art index, and the free formaldehyde content of whole handicraft product is also suitable with prior art, as seen method of the present invention goes for preparation production casting fully and uses self-hardening furan resin, and effectively reduces process costs.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. the pentose compounds substitutes furfuryl alcohol production casting with the method for self-hardening furan resin, it is characterized in that, comprises the steps:
(1) in reactor, add formaldehyde 15-25 part, reach 5-8 part urea and stir, and adjusting pH is that alkalescence is reacted;
(2) add 15-20 part furfuryl alcohol and react, and to adjust system pH be slightly acidic, 80-100 ℃ of reaction of control temperature of reaction;
(3) add 1-3 part urea in the reactant that again obtains in the step (2), and to adjust the material system pH be weakly alkaline, then 70-85 ℃ of control temperature of reaction be cooled to system 45-50 ℃ and stopped reaction;
(4) reactant that step (3) is obtained dewaters, and adds 5-35 part pentose compounds and 35-40 part furfuryl alcohol, stirs, and namely gets desired product;
Above umber is parts by weight.
2. pentose compounds according to claim 1 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
Described pentose compounds comprises one or more the mixture in wood sugar, pectinose, Xylitol, lyxose, the ribose.
3. pentose compounds according to claim 1 and 2 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In the described step (1), adjusting pH is 8.0-10.0.
4. pentose compounds according to claim 1 and 2 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In the described step (2), adjusting pH is 2.5-5.5.
5. pentose compounds according to claim 1 and 2 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In the described step (3), adjusting pH is 7.5-9.5.
6. pentose compounds according to claim 1 and 2 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In the described step (4), described processed is carried out under vacuum condition.
7. pentose compounds according to claim 6 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In the described step (4), described processed is dewatered reactant to water ratio and is lower than 20%.
8. pentose compounds according to claim 1 and 2 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In the described step (2), regulate pH as slightly acidic take dilute acid solns such as the sulfuric acid of 5-25%, hydrochloric acid, oxalic acid, sulfonic acid.
9. pentose compounds according to claim 1 and 2 substitutes the method that self-hardening furan resin is used in furfuryl alcohol production casting, it is characterized in that:
In described step (1) and (3), regulate pH as alkalescence take sodium hydroxide, yellow soda ash, sodium bicarbonate dilute alkaline soln.
10. the casting self-hardening furan resin for preparing of arbitrary described method according to claim 1-9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104387543A (en) * | 2014-12-10 | 2015-03-04 | 济南圣泉集团股份有限公司 | Method for preparing lignin-modified furan resin |
| CN109957082A (en) * | 2017-12-25 | 2019-07-02 | 宜兴市兴南复合材料厂有限公司 | A kind of preparation method of furan resin for casting |
| CN114933686A (en) * | 2022-06-22 | 2022-08-23 | 山东怡泰恒环保材料有限公司 | Preparation method of high-performance dehydration-prevention self-hardening furan resin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0540837A1 (en) * | 1991-11-07 | 1993-05-12 | Bakelite AG | Lignin modified binder |
| CN1324878A (en) * | 2001-06-04 | 2001-12-05 | 王进兴 | Ecological self-hardening furan resin without aldehyde and phenol |
| CN101199981A (en) * | 2007-11-28 | 2008-06-18 | 济南圣泉集团股份有限公司 | Easy collapsibility furan resin for casting and preparing process thereof |
-
2012
- 2012-04-06 CN CN201210099080.1A patent/CN102875756B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0540837A1 (en) * | 1991-11-07 | 1993-05-12 | Bakelite AG | Lignin modified binder |
| CN1324878A (en) * | 2001-06-04 | 2001-12-05 | 王进兴 | Ecological self-hardening furan resin without aldehyde and phenol |
| CN101199981A (en) * | 2007-11-28 | 2008-06-18 | 济南圣泉集团股份有限公司 | Easy collapsibility furan resin for casting and preparing process thereof |
Non-Patent Citations (2)
| Title |
|---|
| 《铸造》 20081110 任玉艳等 "糠醇替代材料对呋喃树脂自硬砂强度的影响" 第1199-1121页 1-10 第57卷, 第11期 * |
| 任玉艳等: ""糠醇替代材料对呋喃树脂自硬砂强度的影响"", 《铸造》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104387543A (en) * | 2014-12-10 | 2015-03-04 | 济南圣泉集团股份有限公司 | Method for preparing lignin-modified furan resin |
| CN104387543B (en) * | 2014-12-10 | 2017-06-23 | 济南圣泉集团股份有限公司 | The method for preparing lignin modification furane resins |
| CN109957082A (en) * | 2017-12-25 | 2019-07-02 | 宜兴市兴南复合材料厂有限公司 | A kind of preparation method of furan resin for casting |
| CN114933686A (en) * | 2022-06-22 | 2022-08-23 | 山东怡泰恒环保材料有限公司 | Preparation method of high-performance dehydration-prevention self-hardening furan resin |
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| CN102875756B (en) | 2015-01-14 |
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