CN1206002A - Synthesis of improved thiobisphenol antioxidant - Google Patents
Synthesis of improved thiobisphenol antioxidant Download PDFInfo
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- CN1206002A CN1206002A CN 97112540 CN97112540A CN1206002A CN 1206002 A CN1206002 A CN 1206002A CN 97112540 CN97112540 CN 97112540 CN 97112540 A CN97112540 A CN 97112540A CN 1206002 A CN1206002 A CN 1206002A
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Abstract
The synthesis is condensation reaction of 5-methyl-2-tert-butyl phenol and sulphur dichloride in petroleum ether containing carbonyl RCOR' to produce 4,4'-thiobi(5-methyl-2-tert-butyl phenol). It features that R is C1-C4 alkyl group and R' is C1-C6 alkyl or alkoxyl group. The solvent may be recovered and the yield of antioxidant is as high as 92%.
Description
The present invention relates to a kind of method of improved synthetic thiobisphenol antioxidant, technical field belongs to International Classification of Patents Int.Cl6CO7C319/00.
Well-known polyolefine adds a spot of oxidation inhibitor and can stop or hinder polyolefinic degraded, prevents that polyolefine at high temperature is subjected to atmospheric oxidation and destroys variable color.4,4 '-thiobis (5-methyl-2-tert.-butyl phenol) is exactly a representative of this oxidation inhibitor.But not anti-high vacuum of common oxidation inhibitor and/or high temperature, because oxidation inhibitor can volatilize from the material of adapted and go, so the volatile patent application of many reduction oxidation inhibitor occurred, USP3 wherein, 986,981st, cut off the polymer-type thiobisphenol antioxidant that the bis-phenol ring is celebrated with S, its monomer is exactly 4,4 '-thiobis (5-methyl-2-tert.-butyl phenol), itself also is a kind of on-contaminated thiobis phenol type antioxidant, is mainly used in macromolecular materials such as crosslinked polyethylene, polypropylene.Its general synthetic method is to be raw material with 5-methyl-2-tert.-butyl phenol and sulfur dichloride, makes solvent with non-polar solvent (sherwood oil, petroleum solvent).In recent years, aspect solvent system and the catalyzer certain innovation is being arranged.Brit 1116119 reports the synthetic method of making solvent with petroleum solvent, it is characterized in that with the cresols being raw material, but yield is lower; DE3313440 report is made solvent with hexane, makes the synthetic method of catalyzer with acid amides (as N, dinethylformamide, i.e. DMF), and yield is 75.1%.The DD249699 report is made solvent with tetracol phenixin, with R ' O (CH2CH2O) XH (R '=alkyl, alkyl phenyl, X=1～1500) make the synthetic method of catalyzer, the highest yield is 93%, but tetracol phenixin is poisonous and dissolve each other with product, must just can obtain product through operations such as concentrated, crystallization, filtration, recrystallizations, so the technical process complexity, solvent is extremely difficult to be recycled.
The present invention is for overcoming the above-mentioned not enough place of prior art, a kind of novel method of making thiobisphenol antioxidant has been proposed, comprise the condensation reaction in the sherwood oil of carbonyl containing compound RCOR ' of 4-tert-butyltoluene phenol and sulfur dichloride, after filtration, separate and to obtain product, it is characterized in that carbonyl compound
R is C1～C
4Alkyl
R ' is C1～C6 alkyl or alkoxyl group.
Said sherwood oil boiling range can be selected 30～90 ℃ of scopes.
Its volume ratio of carbonyl containing compound V/V is a sherwood oil in the said sherwood oil: carbonyl compound=50: 1～2: 1.More preferably 40: 1～5: 1, be preferably 32: 1～20: 1
Said setting-up point is at-10～30 ℃, more preferably-5～10 ℃, is preferably 2～8 ℃.
Carbonyl compound can be selected a kind of or its mixture from methyl acetate, ethyl propionate, acetone or ethyl acetate.
Condensation reaction products is through press filtration, solvent wash, drying, and the thiobisphenol antioxidant yield can reach 85～86.8%.Solvent cycle is utilized, and the thiobisphenol antioxidant yield can reach 88～92%.
The product thiobisphenol antioxidant can directly be used or further oxypolymerization becomes the higher thiobisphenol antioxidant oligopolymer of value.
Embodiment example 1:
Preparation acetone: the mixed solvent 5000ml of sherwood oil (30-60 ℃)=1: 30 (V/V).
Add 380 gram 5-methyl-2 tert.-butyl phenols in the 2000ml four-hole bottle that agitator, thermometer, constant voltage water clock bucket, reflux condensing tube (band exhaust pipe) are housed, 750 milliliters of mixed solvents start agitator, cool the temperature to below 10 ℃; The 121.0 gram sulfur dichloride that will be dissolved in 720 milliliters of mixed solvents add constant pressure funnel, in 2.5～3.0 hours, sulfur dichloride solution is splashed in the four-hole bottle, keeping temperature of reaction therebetween is 2～6 ℃, sulfur dichloride adds the back to be continued to stir 0.5 hour, slowly rises to room temperature then under the nitrogen purging of 200 ml/min flows.Close source of the gas, reaction mixture pressure filtration, with the washing of 100ml mixed solvent, product is air stream drying under low pressure, gets 360 gram products, yield 86.8%.Mother liquor steams 720 milliliters of solvents as the solvent that dissolves sulfur dichloride next time, and kettle base solution is as the solvent that dissolves 5-methyl-2 tert.-butyl phenol next time, and operation steps is the same, for the second time altogether 381.6 gram products, yield 92.0%.So circulation is five times, does not see that product yield and index reduce.The molten point of product is 160～163 ℃.Molecular weight is 358.2 (FD/MS methods).Example 2:
Preparation ethyl propionate: the mixed solvent 1000ml of sherwood oil (30-60 ℃)=1: 25 (V/V).
Add 164 gram 5-methyl-2-tert.-butyl phenols in the 1000ml four-hole bottle that agitator, thermometer, constant pressure funnel, reflux condensing tube (band exhaust pipe) are housed, 150 milliliters of mixed solvents start agitator, cool the temperature to below 10 ℃; 51.5 sulfur dichloride that will be dissolved in 320 milliliters of mixed solvents add constant pressure funnel, in 1.0 hours, 220ml sulfur dichloride solution is splashed in the four-hole bottle, in four-hole bottle, add 150 milliliters of mixed solvents, again remaining sulfur dichloride solution was splashed in the four-hole bottle in 1.0～2.0 hours, keeping temperature of reaction therebetween is 4～8 ℃, sulfur dichloride adds the back to be continued to stir 0.5 hour, slowly rises to room temperature then under the nitrogen purging of 200 ml/min flows.Close source of the gas, reaction mixture pressure filtration, with the washing of 45ml mixed solvent, product is air stream drying under reduced pressure, gets 154.0 gram products, yield 86.0%.Mother liquor steams 320 milliliters of solvents as the solvent that dissolves sulfur dichloride next time, and kettle base solution is as the solvent that dissolves 5-methyl-2-tert.-butyl phenol next time, and operation steps is the same, for the second time altogether 160.1 gram products, yield 89.4%.So the circulation secondary does not see that product yield and index reduce.The molten point of product is 161～163.5 ℃, and molecular weight is 358.1 (FD/MS methods).Example 3:
Preparation ethyl acetate: the mixed solvent 1000ml of sherwood oil (60-90 ℃)=1: 28 (V/V).
Add 164 gram 5-methyl-2 tert.-butyl phenols in the 1000ml four-hole bottle that agitator, thermometer, constant pressure funnel, reflux condensing tube (band exhaust pipe) are housed, 150 milliliters of mixed solvents start agitator, cool the temperature to below 12 ℃; The 51.5 gram sulfur dichloride that will be dissolved in 320 milliliters of mixed solvents add constant pressure funnel, in 1.5 hours, 200ml sulfur dichloride solution is splashed in the four-hole bottle, in four-hole bottle, add 250 milliliters of mixed solvents, again remaining sulfur dichloride solution was splashed in the four-hole bottle in 1.0～2.0 hours, keeping temperature of reaction therebetween is 6～8 ℃, sulfur dichloride adds the back to be continued to stir 0.5 hour, slowly rises to room temperature then under the nitrogen purging of 200 ml/min flows.Close source of the gas, reaction mixture pressure filtration, with the washing of 45ml mixed solvent, product is air stream drying under low pressure, gets 152.2 gram products, yield 85.0%.Mother liquor steams 320 milliliters of solvents as the solvent that dissolves sulfur dichloride next time, and kettle base solution is as the solvent that dissolves 5-methyl-2 tert.-butyl phenol next time, and operation steps is the same, for the second time altogether 157.5 gram products, yield 88.0%.So circulation is ten times, does not see that product yield and index reduce.The molten point of product is 161～163 ℃.Molecular weight is 358.2 (FD/MS methods).Comparative example:
In the 2000ml four-hole bottle that agitator, thermometer, constant pressure funnel, reflux condensing tube (band exhaust pipe) are housed, add 380 gram 5-methyl-2 tert.-butyl phenols, 750 milliliters of sherwood oils (30-60 ℃), start agitator, cool the temperature to below 10 ℃; The 121.0 gram sulfur dichloride that will be dissolved in 720 milliliters of sherwood oils (30-60 ℃) add constant pressure funnel, in 2.5～3.0 hours, sulfur dichloride solution is splashed in the four-hole bottle, keeping temperature of reaction therebetween is 2～6 ℃, sulfur dichloride adds the back to be continued to stir 0.5 hour, slowly rises to room temperature then under the nitrogen purging of 200 ml/min flows.Close source of the gas, reaction mixture pressure filtration, with the washing of 100ml mixed solvent, product is air stream drying under low pressure, gets 295.7 gram products, yield 71.3%.Mother liquor steams 720 milliliters of solvents as the solvent that dissolves sulfur dichloride next time, and kettle base solution is as the solvent that dissolves 5-methyl-2 tert.-butyl phenol next time, and operation steps is the same, for the second time altogether 308.5 gram products, yield 74.4%.So circulation is four times, does not see that product yield and index reduce.The molten point of product is 158～162 ℃.Molecular weight is 358.6 (FD/MS methods).
Employing contains preparation method's testing data of different carbonyl compound RCOR solvents
Claims (9)
1, a kind of improved oxidation inhibitor 4, the synthetic method of 4 '-thiobis (5-methyl-2-tert.-butyl phenol) comprises that 5-methyl-2-tert.-butyl phenol and sulfur dichloride generate compound-10～30 ℃ of condensation reactions in the sherwood oil of carbonyl containing compound RCOR '.
It is characterized in that among the RCOR ':
R is the alkyl of C1～C6
R ' is alkyl or the alkoxyl group of C1～C6.
2,, it is characterized in that the boiling range scope is 30～90 ℃ in the sherwood oil according to the method for claim 1.
3, according to the method for claim 1: it is characterized in that:
RCOR ' sherwood oil V/V is 1: 2～1: 50
4, according to the method for claim 3: it is characterized in that:
RCOR ' sherwood oil V/V is 1: 5～1: 40
5, according to the method for claim 4: it is characterized in that:
RCOR ' sherwood oil V/V is 1: 20～1: 32
6, according to the method for claim 1: it is characterized in that:
Carbonyl compound RCOR ' is selected from methyl acetate, ethyl propionate, acetone, ethyl acetate.
7,, it is characterized in that condensation reaction is to carry out at-10～30 ℃ according to the method for claim 1.
8,, it is characterized in that condensation reaction is to carry out at-5～10 ℃ according to the method for claim 7.
9,, it is characterized in that condensation reaction is to carry out at 2～8 ℃ according to the method for claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112540A CN1053183C (en) | 1997-07-22 | 1997-07-22 | Synthesis of improved thiobisphenol antioxidant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112540A CN1053183C (en) | 1997-07-22 | 1997-07-22 | Synthesis of improved thiobisphenol antioxidant |
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| Publication Number | Publication Date |
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| CN1206002A true CN1206002A (en) | 1999-01-27 |
| CN1053183C CN1053183C (en) | 2000-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN97112540A Expired - Fee Related CN1053183C (en) | 1997-07-22 | 1997-07-22 | Synthesis of improved thiobisphenol antioxidant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531979A (en) * | 2012-01-06 | 2012-07-04 | 淄博万科化工有限公司 | Production method for 4,4'-thiodiphenol |
| CN103012225A (en) * | 2012-12-10 | 2013-04-03 | 常州大学 | Method for synthesizing sulfur-containing bisphenol compound antioxidant |
| CN104151551A (en) * | 2014-07-22 | 2014-11-19 | 淄博市新材料研究所 | Preparation method of rubber vulcanizing agent poly-tert-butylphenoldisulfide |
| CN104796702A (en) * | 2015-04-22 | 2015-07-22 | 无锡天脉聚源传媒科技有限公司 | H264 video frame rate conversion method and device |
| CN115073334A (en) * | 2022-07-01 | 2022-09-20 | 江苏极易新材料有限公司 | Synthesis method of 4,4' -thiobis (6-tert-butyl-m-cresol) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1116119A (en) * | 1966-10-06 | 1968-06-06 | Ni Fizikokhimichesky I Im L Ya | A method for the preparation of substituted phenolsulfide stabilizers |
| AU530175B2 (en) * | 1978-09-07 | 1983-07-07 | Mitsui Toatsu Chemicals Inc. | Preparation of 2,2:-bis(4-(1,1,3,3-tetramethylbutyl) -phenol)sulphide |
| GB2120656B (en) * | 1982-05-26 | 1985-10-23 | Koppers Co Inc | Preparation of thio-bis-phenols |
| DD249699A1 (en) * | 1986-06-05 | 1987-09-16 | Leuna Werke Veb | PROCESS FOR PREPARING 4,4'-THIOBIS- (6-TERT.-BUTYL-KRESOL) |
-
1997
- 1997-07-22 CN CN97112540A patent/CN1053183C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531979A (en) * | 2012-01-06 | 2012-07-04 | 淄博万科化工有限公司 | Production method for 4,4'-thiodiphenol |
| CN102531979B (en) * | 2012-01-06 | 2013-11-13 | 淄博万科化工有限公司 | Production method for 4,4'-thiodiphenol |
| CN103012225A (en) * | 2012-12-10 | 2013-04-03 | 常州大学 | Method for synthesizing sulfur-containing bisphenol compound antioxidant |
| CN104151551A (en) * | 2014-07-22 | 2014-11-19 | 淄博市新材料研究所 | Preparation method of rubber vulcanizing agent poly-tert-butylphenoldisulfide |
| CN104151551B (en) * | 2014-07-22 | 2016-03-30 | 淄博市新材料研究所 | Vulcanizer gathers the preparation method of p-tert-butylphenol disulphide |
| CN104796702A (en) * | 2015-04-22 | 2015-07-22 | 无锡天脉聚源传媒科技有限公司 | H264 video frame rate conversion method and device |
| CN115073334A (en) * | 2022-07-01 | 2022-09-20 | 江苏极易新材料有限公司 | Synthesis method of 4,4' -thiobis (6-tert-butyl-m-cresol) |
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| Publication number | Publication date |
|---|---|
| CN1053183C (en) | 2000-06-07 |
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