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Preparation method for producing branched dodecylphenol

A technology for branched-chain dodecylphenol and phenol, which is applied in the field of production of branched-chain dodecylphenol, can solve the problems of low degree of branching, low reactivity, depolymerization of raw materials, and the like, and achieves high dispersibility , Wide application, simple operation effect

Pending Publication Date: 2021-03-30
广东华锦达新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the raw materials for synthesizing dodecylphenol are triisobutene, which has low degree of branching and low reactivity. At the same time, as the reaction time prolongs, the catalyst will cause the depolymerization of the raw materials, resulting in a decrease in yield and an increase in cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 282g of phenol, 168g of tetrapropylene, and 14.1g of resin catalyst, first add phenol and catalyst to the flask, stir and raise the temperature to 85°C, start to add tetrapropylene dropwise, after 0.5h dropwise, continue to react at 85°C for 2h , after the reaction is completed, filter while it is hot, and suction filter the reaction mixture to separate the product and the catalyst to obtain a mixture of branched chain dodecylphenols. The reaction solution is washed with hot water at 50-80 °C for the mixture, and the hot water washing can be 3 times , then add lye to neutralize the reaction solution until it is neutral, then separate the liquids, take the oil phase and vacuumize it, vacuumize it, and separate excess phenol by vacuum rectification under the protection of nitrogen, so as to obtain a branched chain dodecylphenol product.

[0028] Adopt chromatograph to analyze the composition of branched chain dodecylphenol mixture, wherein the mass percentage of tetra...

Embodiment 2

[0034] Take 235g of phenol, 168g of tetrapropylene, and 11.75g ​​of resin catalyst, first add phenol and catalyst to the flask, stir and raise the temperature to 85°C, start to add tetrapropylene dropwise, after 0.5h dropwise, continue to react at 85°C for 2h After the reaction is completed, filter and separate the product and the catalyst while it is hot to obtain a mixture of branched chain dodecylphenols. The mixture is washed with hot water at 50-80°C for 3 times, and then added to the lye After the reaction solution is neutralized, the liquids are separated, the oil phase is vacuum-distilled and vacuumed, and the excess phenol is separated by vacuum rectification under the protection of nitrogen to obtain a branched chain dodecylphenol product. According to the method of performance test in Example 1, the conversion rate of tetrapropylene in this reaction is 97%, and the selectivity of branched chain dodecylphenol is 89%.

Embodiment 3

[0036] Take 188g of phenol, 168g of tetrapropylene, and 9.4g of resin catalyst, first add phenol and catalyst to the flask, stir and raise the temperature to 85°C, start to add tetrapropylene dropwise, after 0.5h dropwise, continue to react at 85°C for 2h After the reaction is completed, the product and the catalyst are separated by filtration while hot to obtain a branched chain dodecylphenol mixture, and the excess phenol is separated by vacuum distillation from the mixture to obtain a branched chain dodecylphenol product. According to the method of performance test in Example 1, the conversion rate of tetrapropylene in this reaction is 96.5%, and the selectivity of branched chain dodecylphenol is 88.4%.

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Abstract

The invention relates to the technical field of branched dodecylphenol synthesis, in particular to a preparation method for producing branched dodecylphenol. The preparation method for producing branched dodecylphenol comprises the following step: by using phenol and tetrapolypropylene as raw materials, carrying out alkylation reaction in the presence of resin of which the functional group is a sulfonic acid group. In order to overcome the defects in the prior art, the branched dodecylphenol is prepared by taking phenol and tetrapolypropylene as raw materials, so that the method can be used for obtaining the branched dodecylphenol with high selectivity and high yield in a relatively short time under a relatively mild condition and is simple to operate and high in efficiency. Compared withbranched dodecylphenol obtained by other methods, the obtained branched dodecylphenol is higher in side chain branching degree, lower in freezing point and higher in dispersing capacity, and can be widely applied to surfactants.

Description

technical field [0001] The invention relates to the technical field of branched chain dodecylphenol synthesis, and more specifically relates to a preparation method for producing branched chain dodecylphenol. Background technique [0002] Alkylphenols are produced by the alkylation reaction of olefins, aliphatic alcohols or halogenated hydrocarbons with phenol. The important alkylphenols in industrial production are obtained through the alkylation reaction of phenols and olefins. Alkylphenol is not only an important intermediate for the production of anionic surfactants such as alkylphenol polyoxyethylene ether nonionic surfactants and alkylphenol polyoxyethylene ether sulfates and phosphates, but also an important intermediate for the production of fungicides and plasticizers. , stabilizers and other chemical intermediates. [0003] Dodecylphenol is one of the important raw materials for the preparation of lubricating oil additives and industrial surfactants. Since dodecy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/14C07C39/06
CPCC07C37/14C07C39/06
Inventor 李建辉梁万杰黄杰刘阳左洪亮陈炳琳
Owner 广东华锦达新材科技有限公司
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