CN115108908A - Preparation method of multi-purpose additive pentaerythritol stearate - Google Patents
Preparation method of multi-purpose additive pentaerythritol stearate Download PDFInfo
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- CN115108908A CN115108908A CN202210519570.6A CN202210519570A CN115108908A CN 115108908 A CN115108908 A CN 115108908A CN 202210519570 A CN202210519570 A CN 202210519570A CN 115108908 A CN115108908 A CN 115108908A
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- Prior art keywords
- pentaerythritol
- pentaerythritol stearate
- stearic acid
- stearate
- acetaldehyde
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- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000654 additive Substances 0.000 title claims abstract description 16
- 230000000996 additive effect Effects 0.000 title claims abstract description 16
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims abstract description 92
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims abstract description 62
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 45
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 45
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000008117 stearic acid Substances 0.000 claims abstract description 45
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 38
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 36
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 36
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 239000011787 zinc oxide Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 12
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 22
- 239000000376 reactant Substances 0.000 claims description 22
- 238000005886 esterification reaction Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000032050 esterification Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000035484 reaction time Effects 0.000 claims description 6
- 150000001299 aldehydes Chemical class 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 abstract description 8
- 229920000642 polymer Polymers 0.000 abstract description 5
- DJOWTWWHMWQATC-KYHIUUMWSA-N Karpoxanthin Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1(O)C(C)(C)CC(O)CC1(C)O)C=CC=C(/C)C=CC2=C(C)CC(O)CC2(C)C DJOWTWWHMWQATC-KYHIUUMWSA-N 0.000 abstract description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004904 shortening Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004610 Internal Lubricant Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/36—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring increasing the number of carbon atoms by reactions with formation of hydroxy groups, which may occur via intermediates being derivatives of hydroxy, e.g. O-metal
- C07C29/38—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring increasing the number of carbon atoms by reactions with formation of hydroxy groups, which may occur via intermediates being derivatives of hydroxy, e.g. O-metal by reaction with aldehydes or ketones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a preparation method of pentaerythritol stearate, in particular to a preparation method of a multipurpose additive pentaerythritol stearate, which comprises 1 part of formaldehyde, 10 parts of acetaldehyde, 10 parts of calcium hydroxide, 1-4 parts of pentaerythritol, 20 parts of stearic acid and 0.01-0.2 part of zinc oxide; preparing pentaerythritol through appropriate amount of formaldehyde, acetaldehyde and calcium hydroxide; and step two, preparing pentaerythritol stearate from a proper amount of pentaerythritol, stearic acid and zinc oxide. The method has the advantages that the pentaerythritol is prepared by adopting a proper amount of formaldehyde, acetaldehyde and calcium hydroxide, the quality of the pentaerythritol can be improved, the condition that the cost for directly purchasing the polymer tetrol is high and the quality is uneven is avoided, the pentaerythritol is prepared by condensing, dealcoholizing, evaporating, crystallizing, filtering and drying the formaldehyde, the acetaldehyde and the calcium hydroxide according to a certain concentration, the steps of the method are simple, and the purchasing cost of pentaerythritol raw materials can be saved.
Description
Technical Field
The invention relates to a preparation method of pentaerythritol stearate.
Background
Pentaerythritol stearate (PETS) is a white hard high melting point wax, and is dissolved in ethanol or benzene. 1, a plasticizer plays roles of plastication and lubrication in the rubber plastication process. 2. Stabilizer, processing stabilizer for polyvinyl chloride and other polymers, plasticizer and internal lubricant. 3. The lubricant is used as high-grade lubricant compounding agent and lubricant for cutting and rolling thin steel plate.
However, the pentaerythritol stearate in the prior art has low yield and low purity in the preparation method, and aiming at the problem, the preparation method of the multi-purpose additive pentaerythritol stearate is provided.
Disclosure of Invention
The invention aims to provide a preparation method of a multipurpose additive pentaerythritol stearate, which solves the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a multipurpose additive pentaerythritol stearate comprises 1 part of formaldehyde, 10 parts of acetaldehyde, 10 parts of calcium hydroxide, 1-4 parts of pentaerythritol, 20 parts of stearic acid and 0.01-0.2 part of zinc oxide;
preparing pentaerythritol through appropriate amount of formaldehyde, acetaldehyde and calcium hydroxide;
and step two, preparing pentaerythritol stearate from a proper amount of pentaerythritol, stearic acid and zinc oxide.
Preferably, the preparation method of pentaerythritol further comprises:
condensing a proper amount of formaldehyde, acetaldehyde and calcium hydroxide according to a certain concentration to obtain a mixture A;
step two, removing aldehyde from the mixture A prepared in the step one to obtain a mixture B;
step three, putting the mixture B prepared in the step two into a container for evaporation and crystallization;
and step four, putting the powder prepared by evaporating and crystallizing the mixture B into a centrifugal machine, performing high-speed centrifugal filtration by using centrifugal force, and then performing drying treatment to obtain pure pentaerythritol.
Preferably, the condensation temperature condition of the formaldehyde, the acetaldehyde and the calcium hydroxide is 20-70 ℃, and the reaction time is 3 hours.
Preferably, the method of drying treatment comprises;
step one, placing the centrifuged wet pentaerythritol into an inner cavity of a dryer, and drying for 20min at the temperature of 100-200 ℃;
and step two, taking out the dried pentaerythritol and placing the pentaerythritol in a clean container.
Preferably, the preparation method of the pentaerythritol stearate comprises the following steps:
step one, putting a proper amount of stearic acid into an inner cavity of a reaction kettle, and heating at the temperature of 50-100 ℃ to completely melt the stearic acid;
step two, putting the completely melted stearic acid into an esterification tank, adding a proper amount of pentaerythritol and zinc oxide, and heating for 4 hours at the temperature of 120-280 ℃ to obtain a reactant;
taking out the reactant by using a sampler, and detecting the pH value of the reactant by using a pH test paper;
and step four, taking out the reactant with the pH value meeting the standard, and filtering to complete the preparation of the pentaerythritol stearate.
Preferably, the reactant has a pH of 5.
Preferably, the method of filtering comprises:
step one, connecting an input end of a drainage pump to a liquid outlet of an esterification tank, and introducing an output end of the drainage pump to a feed inlet of a filter;
starting a filter to filter the pentaerythritol stearate for 20 min;
and step three, closing the filter, and taking out the filtered pentaerythritol stearate to finish the filtration.
Preferably, the stearic acid has a quality index model of 1839 or 1838.
Compared with the prior art, the invention has the beneficial effects that:
1. the method has the advantages that the pentaerythritol is prepared by adopting a proper amount of formaldehyde, acetaldehyde and calcium hydroxide, the quality of the pentaerythritol can be improved, the condition that the cost for directly purchasing polymer tetrol is high and the quality is uneven is avoided, the pentaerythritol is prepared by condensing, dealcoholizing, evaporating, crystallizing, filtering and drying the formaldehyde, the acetaldehyde and the calcium hydroxide according to a certain concentration, the steps of the method are simple, and the purchasing cost of pentaerythritol raw materials can be saved;
2. the pentaerythritol stearate with the pH value of 5 is obtained after esterification reaction of a proper amount of pentaerythritol, stearic acid and zinc oxide, the preparation of the pentaerythritol stearate is realized, the steps and the method are simple and convenient, the preparation time of the pentaerythritol stearate can be shortened, the yield is high, the cost is low, and the investment is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, 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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The invention provides a technical scheme that: a preparation method of a multipurpose additive pentaerythritol stearate comprises 1 part of formaldehyde, 10 parts of acetaldehyde, 10 parts of calcium hydroxide, 1 part of pentaerythritol, 20 parts of stearic acid and 0.01 part of zinc oxide;
preparing pentaerythritol by using a proper amount of formaldehyde, acetaldehyde and calcium hydroxide, and preparing pentaerythritol by using a proper amount of formaldehyde, acetaldehyde and calcium hydroxide, so that the quality of pentaerythritol can be improved, the condition that the cost of directly purchasing polymer tetrol is uneven in high quality is avoided, the pentaerythritol is prepared by condensing, dealcoholizing, evaporating, crystallizing, filtering and drying the formaldehyde, the acetaldehyde and the calcium hydroxide according to a certain concentration, the method has simple steps, and the purchasing cost of pentaerythritol raw materials can be saved;
and secondly, preparing pentaerythritol stearate from a proper amount of pentaerythritol, stearic acid and zinc oxide, and performing esterification reaction on the pentaerythritol, the stearic acid and the zinc oxide to obtain the pentaerythritol stearate with the pH value of 5.
In this embodiment, the method for preparing pentaerythritol further includes:
condensing a proper amount of formaldehyde, acetaldehyde and calcium hydroxide according to a certain concentration to obtain a mixture A, and fully reacting the formaldehyde, the acetaldehyde and the calcium hydroxide through a condensation reaction to obtain the mixture A;
step two, removing aldehyde from the mixture A prepared in the step one to obtain a mixture B;
step three, putting the mixture B prepared in the step two into a container for evaporation and crystallization;
and fourthly, putting the powder prepared by evaporating and crystallizing the mixture B into a centrifugal machine, performing high-speed centrifugal filtration by using centrifugal force, and then performing drying treatment to obtain pure pentaerythritol, wherein the pentaerythritol is prepared by filtering formaldehyde, acetaldehyde and calcium hydroxide according to a certain concentration under the centrifugal force action of the centrifugal machine, so that impurities in the pentaerythritol are filtered out, the purity of the pentaerythritol is improved, the quality of the pentaerythritol is improved, the influence on the quality of pentaerythritol stearate caused by low purity of the pentaerythritol is avoided, the impurities in the pentaerythritol are prevented from reacting with other raw materials when the pentaerythritol stearate is prepared, and the quality of the pentaerythritol is improved.
In the embodiment, the condensation temperature condition of the formaldehyde, the acetaldehyde and the calcium hydroxide is 20 ℃, the reaction time is 3 hours, the formaldehyde, the acetaldehyde and the calcium hydroxide are reacted for 3 hours at 20 ℃, the formaldehyde, the acetaldehyde and the calcium hydroxide can be fully reacted, the phenomenon that the formaldehyde, the acetaldehyde and the calcium hydroxide are not reacted completely to cause waste of raw materials is avoided, the production cost is increased, and the quality of the pentaerythritol is reduced.
In this embodiment, the method of drying includes;
putting the centrifuged wet pentaerythritol into an inner cavity of a dryer, and drying for 20min at the temperature of 100 ℃ to keep the pentaerythritol dry before esterification reaction, so as to avoid the wet pentaerythritol participating in the esterification reaction with stearic acid and causing the reduction of product quality;
and step two, taking out the dried pentaerythritol and placing the pentaerythritol in a clean container.
In this embodiment, the preparation method of pentaerythritol stearate includes:
step one, putting a proper amount of stearic acid into an inner cavity of a reaction kettle, heating at the temperature of 50 ℃ to completely melt the stearic acid, facilitating the reaction of the stearic acid and pentaerythritol, enlarging the contact area of the pentaerythritol and the stearic acid, shortening the reaction time and enabling the stearic acid and the pentaerythritol to react more thoroughly;
putting the completely melted stearic acid into an esterification tank, adding a proper amount of pentaerythritol and zinc oxide, catalyzing the reaction of the stearic acid and the pentaerythritol by adding the zinc oxide, accelerating the reaction speed of the stearic acid and the pentaerythritol, shortening the preparation time of pentaerythritol stearate, accelerating the production speed of products, and heating for 4 hours at the temperature of 120 ℃ to obtain a reactant;
taking out the reactant by using a sampler, detecting the pH value of the reactant by using a pH test paper, and knowing the reaction progress of pentaerythritol and stearic acid by detecting the pH value, wherein the pH value of pentaerythritol stearate is 5;
and step four, taking out the reactant with the pH value meeting the standard, filtering the reactant, filtering out impurities in the pentaerythritol stearate, improving the quality of the pentaerythritol stearate, and avoiding the influence on the quality of the pentaerythritol stearate due to the impurity heavily doped in the pentaerythritol stearate so as to finish the preparation of the pentaerythritol stearate.
In this embodiment, the ph of the reactant is 5, so that the reaction progress of pentaerythritol and stearic acid can be known, and the ph of pentaerythritol stearate is 5.
In this embodiment, the filtering method includes:
step one, connecting an input end of a drainage pump to a liquid outlet of an esterification tank, and introducing an output end of the drainage pump to a feed inlet of a filter;
starting a filter to filter the pentaerythritol stearate for 20 min;
and step three, closing the filter, and taking out the filtered pentaerythritol stearate to finish the filtering.
In this embodiment, the stearic acid has a quality index model of 1838.
Example 2
The invention provides a technical scheme that: a preparation method of a multipurpose additive pentaerythritol stearate comprises 1 part of formaldehyde, 10 parts of acetaldehyde, 10 parts of calcium hydroxide, 4 parts of pentaerythritol, 20 parts of stearic acid and 0.01-0.2 part of zinc oxide;
preparing pentaerythritol by using a proper amount of formaldehyde, acetaldehyde and calcium hydroxide, and preparing pentaerythritol by using a proper amount of formaldehyde, acetaldehyde and calcium hydroxide, so that the quality of pentaerythritol can be improved, the condition that the cost of directly purchasing polymer tetrol is uneven in high quality is avoided, the pentaerythritol is prepared by condensing, dealcoholizing, evaporating, crystallizing, filtering and drying the formaldehyde, the acetaldehyde and the calcium hydroxide according to a certain concentration, the method has simple steps, and the purchasing cost of pentaerythritol raw materials can be saved;
and secondly, preparing pentaerythritol stearate from a proper amount of pentaerythritol, stearic acid and zinc oxide, and performing esterification reaction on the pentaerythritol, the stearic acid and the zinc oxide to obtain the pentaerythritol stearate with the pH value of 5.
In this embodiment, the method for preparing pentaerythritol further includes:
condensing a proper amount of formaldehyde, acetaldehyde and calcium hydroxide according to a certain concentration to obtain a mixture A, and fully reacting the formaldehyde, the acetaldehyde and the calcium hydroxide through a condensation reaction to obtain a mixture A;
step two, removing aldehyde from the mixture A prepared in the step one to obtain a mixture B;
step three, putting the mixture B prepared in the step two into a container for evaporation and crystallization;
and fourthly, putting the powder prepared by evaporating and crystallizing the mixture B into a centrifugal machine, performing high-speed centrifugal filtration by using centrifugal force, and then performing drying treatment to obtain pure pentaerythritol, wherein the pentaerythritol is prepared by filtering formaldehyde, acetaldehyde and calcium hydroxide according to a certain concentration under the centrifugal force action of the centrifugal machine, so that impurities in the pentaerythritol are filtered out, the purity of the pentaerythritol is improved, the quality of the pentaerythritol is improved, the influence on the quality of pentaerythritol stearate caused by low purity of the pentaerythritol is avoided, the impurities in the pentaerythritol are prevented from reacting with other raw materials when the pentaerythritol stearate is prepared, and the quality of the pentaerythritol is improved.
In the embodiment, the condensation temperature condition of the formaldehyde, the acetaldehyde and the calcium hydroxide is 70 ℃, the reaction time is 3 hours, the formaldehyde, the acetaldehyde and the calcium hydroxide are reacted for 3 hours at 20 ℃, the formaldehyde, the acetaldehyde and the calcium hydroxide can be fully reacted, the waste of raw materials caused by incomplete reaction of the formaldehyde, the acetaldehyde and the calcium hydroxide is avoided, the production cost is increased, and the quality of the pentaerythritol is reduced.
In this embodiment, the method of drying includes;
putting the centrifuged wet pentaerythritol into an inner cavity of a dryer, and drying for 20min at the temperature of 200 ℃ to keep the pentaerythritol dry before esterification reaction, so as to avoid the wet pentaerythritol participating in the esterification reaction with stearic acid and causing the reduction of product quality;
and step two, taking out the dried pentaerythritol and placing the pentaerythritol in a clean container.
In this embodiment, the preparation method of pentaerythritol stearate includes:
step one, putting a proper amount of stearic acid into an inner cavity of a reaction kettle, heating at the temperature of 100 ℃ to completely melt the stearic acid, facilitating the reaction of the stearic acid and pentaerythritol, enlarging the contact area of the pentaerythritol and the stearic acid, shortening the reaction time and enabling the stearic acid and the pentaerythritol to react more thoroughly;
putting the completely melted stearic acid into an esterification tank, adding a proper amount of pentaerythritol and zinc oxide, catalyzing the reaction of the stearic acid and the pentaerythritol by adding the zinc oxide, accelerating the reaction speed of the stearic acid and the pentaerythritol, shortening the preparation time of pentaerythritol stearate, accelerating the production speed of products, and heating for 4 hours at the temperature of 280 ℃ to obtain a reactant;
taking out the reactant by using a sampler, detecting the pH value of the reactant by using a pH test paper, and knowing the reaction progress of pentaerythritol and stearic acid by detecting the pH value, wherein the pH value of pentaerythritol stearate is 5;
and step four, taking out the reactant with the pH value meeting the standard, filtering the reactant, filtering out impurities in the pentaerythritol stearate, improving the quality of the pentaerythritol stearate, and avoiding the influence on the quality of the pentaerythritol stearate due to the impurity heavily doped in the pentaerythritol stearate so as to finish the preparation of the pentaerythritol stearate.
In this embodiment, the ph of the reactant is 5, so that the reaction progress of pentaerythritol and stearic acid can be known, and the ph of pentaerythritol stearate is 5.
In this embodiment, the filtering method includes:
step one, connecting an input end of a drainage pump to a liquid outlet of an esterification tank, and introducing an output end of the drainage pump to a feed inlet of a filter;
starting a filter to filter the pentaerythritol stearate for 20 min;
and step three, closing the filter, and taking out the filtered pentaerythritol stearate to finish the filtering.
In this embodiment, the stearic acid has a quality index model of 1839.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A preparation method of a multipurpose additive pentaerythritol stearate is characterized in that: comprises 1 portion of formaldehyde, 10 portions of acetaldehyde, 10 portions of calcium hydroxide, 1 to 4 portions of pentaerythritol, 20 portions of stearic acid and 0.01 to 0.2 portion of zinc oxide;
preparing pentaerythritol through appropriate amount of formaldehyde, acetaldehyde and calcium hydroxide;
and step two, preparing pentaerythritol stearate from a proper amount of pentaerythritol, stearic acid and zinc oxide.
2. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 1, wherein the method comprises the following steps: the preparation method of pentaerythritol also comprises the following steps:
condensing a proper amount of formaldehyde, acetaldehyde and calcium hydroxide according to a certain concentration to obtain a mixture A;
step two, removing aldehyde from the mixture A prepared in the step one to obtain a mixture B;
step three, putting the mixture B prepared in the step two into a container for evaporation and crystallization;
and step four, putting the powder prepared by evaporating and crystallizing the mixture B into a centrifugal machine, performing high-speed centrifugal filtration by using centrifugal force, and then performing drying treatment to obtain pure pentaerythritol.
3. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 2, wherein the method comprises the following steps: the condensation temperature condition of the formaldehyde, the acetaldehyde and the calcium hydroxide is 20-70 ℃, and the reaction time is 3 hours.
4. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 2, wherein the method comprises the following steps: the method for drying treatment comprises the following steps;
step one, placing the centrifuged wet pentaerythritol into an inner cavity of a dryer, and drying for 20min at the temperature of 100-200 ℃;
and step two, taking out the dried pentaerythritol and placing the pentaerythritol in a clean container.
5. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 1, wherein: the preparation method of the pentaerythritol stearate comprises the following steps:
step one, putting a proper amount of stearic acid into an inner cavity of a reaction kettle, and heating at the temperature of 50-100 ℃ to completely melt the stearic acid;
step two, putting the completely melted stearic acid into an esterification tank, adding a proper amount of pentaerythritol and zinc oxide, and heating for 4 hours at the temperature of 120-280 ℃ to obtain a reactant;
taking out the reactant by using a sampler, and detecting the pH value of the reactant by using a pH test paper;
and step four, taking out the reactant with the pH value meeting the standard, and filtering to complete the preparation of the pentaerythritol stearate.
6. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 5, wherein the method comprises the following steps: the pH value of the reactant is 5.
7. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 5, wherein: the filtering method comprises the following steps:
step one, connecting an input end of a drainage pump to a liquid outlet of an esterification tank, and introducing an output end of the drainage pump to a feed inlet of a filter;
starting a filter to filter the pentaerythritol stearate for 20 min;
and step three, closing the filter, and taking out the filtered pentaerythritol stearate to finish the filtration.
8. The method for preparing pentaerythritol stearate as a multipurpose additive according to claim 1, wherein the method comprises the following steps: the stearic acid has a quality index model of 1839 or 1838.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210519570.6A CN115108908A (en) | 2022-05-12 | 2022-05-12 | Preparation method of multi-purpose additive pentaerythritol stearate |
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| CN202210519570.6A CN115108908A (en) | 2022-05-12 | 2022-05-12 | Preparation method of multi-purpose additive pentaerythritol stearate |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651373A (en) * | 2004-12-03 | 2005-08-10 | 王永军 | Production technology of tetramethylol methane by using ealcium method |
| CN103880668A (en) * | 2012-12-24 | 2014-06-25 | 青岛帅王油脂化学有限公司 | Pentaerythritol stearate preparation technology |
| CN103880669A (en) * | 2012-12-24 | 2014-06-25 | 青岛帅王油脂化学有限公司 | Pentaerythritol stearate preparation method |
| CN104230660A (en) * | 2014-09-27 | 2014-12-24 | 安徽金禾实业股份有限公司 | Method for preparing 95 grade pentaerythritol |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651373A (en) * | 2004-12-03 | 2005-08-10 | 王永军 | Production technology of tetramethylol methane by using ealcium method |
| CN103880668A (en) * | 2012-12-24 | 2014-06-25 | 青岛帅王油脂化学有限公司 | Pentaerythritol stearate preparation technology |
| CN103880669A (en) * | 2012-12-24 | 2014-06-25 | 青岛帅王油脂化学有限公司 | Pentaerythritol stearate preparation method |
| CN104230660A (en) * | 2014-09-27 | 2014-12-24 | 安徽金禾实业股份有限公司 | Method for preparing 95 grade pentaerythritol |
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Application publication date: 20220927 |