CN114014758B - Decoloring method of plasticizer DINCH product - Google Patents
Decoloring method of plasticizer DINCH product Download PDFInfo
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- CN114014758B CN114014758B CN202111247338.3A CN202111247338A CN114014758B CN 114014758 B CN114014758 B CN 114014758B CN 202111247338 A CN202111247338 A CN 202111247338A CN 114014758 B CN114014758 B CN 114014758B
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- HORIEOQXBKUKGQ-UHFFFAOYSA-N bis(7-methyloctyl) cyclohexane-1,2-dicarboxylate Chemical compound CC(C)CCCCCCOC(=O)C1CCCCC1C(=O)OCCCCCCC(C)C HORIEOQXBKUKGQ-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000004806 diisononylester Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000004014 plasticizer Substances 0.000 title claims abstract description 17
- 239000003463 adsorbent Substances 0.000 claims abstract description 46
- 238000003756 stirring Methods 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000001179 sorption measurement Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 235000017060 Arachis glabrata Nutrition 0.000 claims description 13
- 244000105624 Arachis hypogaea Species 0.000 claims description 13
- 235000010777 Arachis hypogaea Nutrition 0.000 claims description 13
- 235000018262 Arachis monticola Nutrition 0.000 claims description 13
- 235000020232 peanut Nutrition 0.000 claims description 13
- 240000008042 Zea mays Species 0.000 claims description 11
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 11
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 11
- 235000005822 corn Nutrition 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010908 plant waste Substances 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 241000209140 Triticum Species 0.000 description 7
- 235000021307 Triticum Nutrition 0.000 description 7
- 241000353135 Psenopsis anomala Species 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 5
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000032050 esterification Effects 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004042 decolorization Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 238000005809 transesterification reaction Methods 0.000 description 3
- MUTGBJKUEZFXGO-OLQVQODUSA-N (3as,7ar)-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione Chemical compound C1CCC[C@@H]2C(=O)OC(=O)[C@@H]21 MUTGBJKUEZFXGO-OLQVQODUSA-N 0.000 description 2
- QDTDKYHPHANITQ-UHFFFAOYSA-N 7-methyloctan-1-ol Chemical compound CC(C)CCCCCCO QDTDKYHPHANITQ-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000219112 Cucumis Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 229960004365 benzoic acid Drugs 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N phthalic anhydride Chemical class C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/56—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a decoloring method of a plasticizer DINCH product, which comprises the following steps: baking and crushing crop waste into a preset size to serve as an adsorbent, pouring the adsorbent into a stirrer, adding a DINCH raw material, and stirring for a preset time to perform adsorption; filtering the adsorbed DINCH finished product by a filter screen arranged at the outlet of the stirrer and pouring out; the chromaticity of the DINCH finished product is below 20; the remaining adsorbent in the stirrer can be reused. The product obtained by the method has good transparency, and is a process route which is time-saving, low in energy consumption, low in cost, few in working procedures, simple to operate, low in cost and environment-friendly.
Description
Technical Field
The invention relates to the technical field of fine chemical engineering, in particular to a decoloring method of a plasticizer DINCH product.
Background
Cyclohexane-1, 2-dicarboxylic acid diisononyl ester (DINCH) is an environment-friendly plasticizer conforming to European Union REACH regulations. The method is mainly used for: medical drugs, food packaging, toys for children and care products for children are good substitutes for benzene carboxylic acid ester plasticizers. Industrially, the main synthesis method of the plasticizer DINCH is esterification synthesis under the action of the catalyst tetraisopropyl titanate.
Methods for synthesizing cyclohexane-1, 2-dicarboxylic acid diisononyl ester (DINCH) include a direct hydrogenation method, a direct esterification method and an ester interchange method. (1) transesterification method: the purpose of transesterification is typically to replace the old "-OR" in the ester with a new "-OR" exchange that is required. The only purpose of developing the product is to change the benzene ring in the ester into non-benzene ring, and finally solve the toxicity problem structurally. Therefore, transesterification is theoretically possible as a laboratory test method, but the conversion is less than 50%, the product separation is difficult, and the purity is low. (2) direct hydrogenation process: diisononyl phthalate (DINP) is hydrogenated to cyclohexane-1, 2-dicarboxylic acid diisononyl ester (DINCH) under the catalysis of noble metal catalysts such as nickel, platinum, palladium, rhodium, ruthenium and the like at high temperature and high pressure. (3) direct esterification method: the method is to directly esterify hydrogenated phthalic anhydride without benzene ring with alcohol under the action of catalyst, and the main raw materials are hexahydrophthalic anhydride and isononanol. The hexahydrophthalic anhydride is a bulk product in the domestic chemical raw material market, and the raw material is sufficient in a production device of isononanol with the production of 18 ten thousand tons/year by the luxuriant petrochemical industry; the equipment manufacture and engineering implementation are easy to realize, the investment is low, and the existing part of the advanced dioctyl phthalate (DOP) production device can be utilized through improvement and process adjustment. However, the product quality of the esterification synthesis technology of DINCH reported in China is different from that of the German basf product. The German Basoff has high purity and low chromaticity, and occupies a large market share.
Wherein, the color number of the product is an important index for measuring the quality of the plasticizer. Currently, the quality difference between the domestic DINCH and basf is mainly in chromaticity. If a decoloring process can be developed, the chromaticity of the DINCH product is reduced, so that the chromaticity is kept at the same level as that of Basoff, foreign monopoly can be broken, and the sales of domestic products can be opened.
Currently, the decoloring method of DINCH mainly adopts activated carbon for decoloring. The raw materials for producing the active carbon at early stage are wood, hard fruit shells or animal bones, and coal is mainly adopted at later stage, and the active carbon is obtained by carbonization and activation treatment, and the production method comprises the following steps: (1) steam, gas activation. The carbon is activated at 850-900 ℃ by using steam or carbon dioxide. (2) Chemical activation method. The activated carbon can be obtained after high-temperature treatment by using the gas released by the activating agent or impregnating the raw material with the activating agent. The production process is complex, the temperature of the charcoal burned by the wood or the shell is high, the energy consumption is high, and the carbon dioxide isothermal chamber gas can be generated in the process; and the adoption of the coal activated carbon wastes energy firstly, and simultaneously generates waste gas and waste water by using the activating agent. Therefore, the process for producing the activated carbon is complex, the cost is high, the energy is consumed, and meanwhile, pollution is generated.
How to develop a new adsorption process, the material is environment-friendly, the product quality of the DINCH is improved, the process is simple, pollution is not generated, the cost is low, the beneficial decolorization effect can be achieved, and the process is an urgent matter.
Disclosure of Invention
1. The technical problems to be solved are as follows:
aiming at the technical problems, the invention provides a decoloring method of a plasticizer DINCH product, which uses agricultural solid waste to prepare an adsorbent, and the adsorbent is stirred with a DINCH raw material and then filtered to finally obtain the DINCH product with the chromaticity of 20 or below.
2. The technical scheme is as follows:
a method for decoloring a plasticizer DINCH product, which is characterized by comprising the following steps of: baking and crushing crop waste into a preset size to serve as an adsorbent, pouring the adsorbent into a stirrer, adding a DINCH raw material, and stirring for a preset time to perform adsorption; filtering the adsorbed DINCH finished product by a filter screen arranged at the outlet of the stirrer and pouring out; the chromaticity of the DINCH finished product is below 20; the remaining adsorbent in the stirrer can be reused.
Further, the raw materials of the crop waste adsorbent are one or two of peanut shells, melon seed shells, corn stalks and wheat stalks.
Further, the baking temperature of the crop waste is 75-160 ℃.
Further, the filter screen is one of a copper filter screen, a stainless steel filter screen, a gold filter screen, a silver filter screen, a platinum filter screen, a PVC filter screen, an ABS filter screen, a PP filter screen, a PE filter screen and a PTFE filter screen.
Further, the stirring speed of the stirrer during adsorption is 20-200 rpm; the stirring speed during filtration is 10-100 rpm.
Further, the adsorption time is within 10-100 min.
Further, the addition amount of the adsorbent is 5% -40% of the mass of the DINCH raw material.
3. The beneficial effects are that:
the invention relates to a method for decoloring plasticizer DINCH products, which comprises the steps of crushing baked peanut shells, melon shells, corn stalks, wheat stalks and other crop wastes to obtain an adsorbent, pouring the crushed crop wastes into a reaction device with a stirring function and a filter screen at the bottom, adding DINCH raw materials, stirring for a period of time, discharging DINCH, filtering the adsorbent in the device to finally obtain the DINCH products with the chromaticity of 20 or below, and continuously applying the adsorbent in the device. Compared with the prior art: 1) The invention adopts baked agricultural waste such as peanut shells, melon seed shells, corn stalks, wheat stalks and the like as the adsorbent after being crushed, has low cost and no pollution to the DINCH decolorization, can change waste into valuable, and can achieve the beneficial decolorization effect. 2) The invention uses a reaction device with stirring and a filter screen at the bottom as decoloring equipment, the filter screen at the bottom can leave the adsorbent in the device after decoloring, the DINCH product is discharged, and the adsorbent can be used for multiple times until the adsorption is saturated. 3) The invention has the advantages of time saving, low energy consumption, low cost, few working procedures and good decoloring effect (the chromaticity of the decoloring tiger product can reach below 20 ℃), and 4) the invention has the advantages of simple operation, low cost, wide application, environmental friendliness and a green process route.
Detailed Description
A method for decoloring a plasticizer DINCH product, which is characterized by comprising the following steps of: baking and crushing crop waste into a preset size to serve as an adsorbent, pouring the adsorbent into a stirrer, adding a DINCH raw material, and stirring for a preset time to perform adsorption; filtering the adsorbed DINCH finished product by a filter screen arranged at the outlet of the stirrer and pouring out; the chromaticity of the DINCH finished product is below 20; the remaining adsorbent in the stirrer can be reused.
Further, the raw materials of the crop waste adsorbent are one or two of peanut shells, melon seed shells, corn stalks and wheat stalks.
Further, the baking temperature of the crop waste is 75-160 ℃.
Further, the filter screen is one of a copper filter screen, a stainless steel filter screen, a gold filter screen, a silver filter screen, a platinum filter screen, a PVC filter screen, an ABS filter screen, a PP filter screen, a PE filter screen and a PTFE filter screen.
Further, the stirring speed of the stirrer during adsorption is 20-200 rpm; the stirring speed during filtration is 10-100 rpm.
Further, the adsorption time is within 10-100 min.
Further, the addition amount of the adsorbent is 5% -40% of the mass of the DINCH raw material.
The adsorbent of the invention is derived from crop waste. Such as peanut shells, melon seed shells, corn stalks, wheat stalks and the like, and baking the peanut shells, melon seed shells, corn stalks, wheat stalks and the like to eliminate moisture in the peanut shells, the melon seed shells, the corn stalks and the wheat stalks. The baking temperature is 75-160 ℃. Cellulose and phenolic-sugar acid polymers which remain in the baking at low temperature (such as 80 ℃) have the capability of adsorbing tiny impurities, and carbonization occurs at high temperature (such as 160 ℃), and the porous structure also has the capability of adsorbing tiny impurities.
The reaction device with the stirring function and the filter screen at the bottom can be made of one of copper, stainless steel, gold, silver, platinum and PVC, ABS, PP, PE, PTFE, preferably stainless steel, ABS, PTFE and copper, and has the advantages of low cost, easy operation, good effect, corrosion resistance and higher cost performance. The filter screen is detachable and is convenient for washing.
The addition amount of the adsorbent is 5% -40% of the mass of the DINCH raw material, the adsorption speed is higher as the addition amount is larger, the adsorption effect is better, but the addition of the adsorbent is excessive, the stirring resistance is increased, the filtering is possibly difficult, and therefore the addition amount of 5% -30% is preferable.
According to the invention, stirring is started during adsorption, the stirring speed is controlled to be 20-100 rpm, the stirring speed is reduced to be 5-60 rpm during filtration, and certain stirring during adsorption is beneficial to the entry of tiny impurities into the adsorbent, so that the adsorption is not suitable to be too slow, and the resistance of a filtering port can be reduced due to certain stirring speed during filtration.
The adsorption time of the invention can be controlled within 10 min-100 min, and a better effect can be achieved within 20-45 min generally.
Specific examples:
example 1
4kg of peanut shells are baked and crushed at 80 ℃ to be used as an adsorbent, the peanut shells are poured into a 20L glass reaction device with stirring and a PTFE filter screen at the bottom, 15kg of the DINCH raw material is added, stirring is started, the speed is 100rpm, the DINCH is discharged after 30min, the stirring speed is 60rpm, the adsorbent is filtered in the device, the DINCH product with the chromaticity of 20 is finally obtained, and the adsorbent in the device can be continuously used.
Example 2
4.5kg of peanut shells are baked and crushed at 140 ℃ to be used as an adsorbent, the peanut shells are poured into a 20L transparent acrylic reaction device with stirring and a copper filter screen at the bottom, 16kg of the DINCH raw material is added, stirring is started, the speed is 100rpm, the DINCH is discharged after 30min, the stirring speed is 60rpm, the adsorbent is filtered in the device, the DINCH product with the chromaticity of 18 is finally obtained, and the adsorbent in the device can be continuously used.
Example 3
2kg of corn stalks are baked and crushed at 80 ℃ to be used as an adsorbent, the adsorbent is poured into a 20L glass reaction device with stirring and a PTFE filter screen at the bottom, 18kg of the DINCH raw material is added, stirring is started, the speed is 120rpm, the DINCH is discharged after 60min, the stirring speed is 60rpm, the adsorbent is filtered in the device, the DINCH product with the chromaticity of 20 is finally obtained, and the adsorbent in the device can be continuously used.
Example 4
4.5kg of corn stalks are baked and crushed at 160 ℃ to be used as an adsorbent, the mixture is poured into a 20L glass reaction device with stirring and a PTFE filter screen at the bottom, then 15L of the DINCH raw material is added, stirring is started, the speed is 100rpm, the DINCH is discharged after 60min, the stirring speed is 80rpm, the adsorbent is filtered in the device, the DINCH product with the chromaticity of 18 is finally obtained, and the adsorbent in the device can be continuously used.
Example 5
2kg of peanut shells and 2kg of corn stalks are baked and crushed at 160 ℃ to be used as adsorbents, the adsorbents are poured into a 20L transparent acrylic reaction device with stirring and a PTFE filter screen at the bottom, then 15L of DINCH raw material is added, stirring is started, the speed is 100rpm, DINCH is discharged after 60min, at this time, the stirring speed is 80rpm, the adsorbents are filtered in the device, the DINCH product with the chromaticity of 16 is finally obtained, and the adsorbents in the device can be continuously used.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that the scope of the invention shall be limited only by the claims appended hereto.
Claims (5)
1. A method for decoloring a plasticizer DINCH product, which is characterized by comprising the following steps of: baking one or two of peanut shells and corn stalks to a temperature in the range of 75-160 ℃, and then grinding the mixture into a preset size to serve as an adsorbent; pouring the adsorbent into a stirrer, adding the DINCH raw material, and adsorbing at a certain stirring speed and time; filtering the adsorbed DINCH finished product by a filter screen arranged at the outlet of the stirrer and pouring out; the chromaticity of the DINCH finished product is below 20; the remaining adsorbent in the stirrer can be reused.
2. A process for decolorizing a plasticizer DINCH product according to claim 1, characterized in that: the filter screen is one of a copper filter screen, a stainless steel filter screen, a gold filter screen, a silver filter screen, a platinum filter screen, a PVC filter screen, an ABS filter screen, a PP filter screen, a PE filter screen and a PTFE filter screen.
3. A process for decolorizing a plasticizer DINCH product according to claim 1, characterized in that: the stirring speed of the stirrer during adsorption is 20-200 rpm; the stirring speed during filtration is 10-100 rpm.
4. A process for decolorizing a plasticizer DINCH product according to claim 1, characterized in that: the adsorption time is within 10-100 min.
5. A process for decolorizing a plasticizer DINCH product according to claim 1, characterized in that: the adding amount of the adsorbent is 5% -40% of the mass of the DINCH raw material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111247338.3A CN114014758B (en) | 2021-10-26 | 2021-10-26 | Decoloring method of plasticizer DINCH product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111247338.3A CN114014758B (en) | 2021-10-26 | 2021-10-26 | Decoloring method of plasticizer DINCH product |
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| CN114014758B true CN114014758B (en) | 2023-12-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157615A (en) * | 2007-10-31 | 2008-04-09 | 无锡双象化学工业有限公司 | Method for producing plasticizer phthalic acid dinonyl |
| CN102775309A (en) * | 2012-08-15 | 2012-11-14 | 淄博轩翌化工有限公司 | Preparation method of environment-friendly plasticizer DINCH |
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