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Synthetic method of 1, 3-dioxane type organic compounds

A technology of dioxane, organic compound, applied in 1 field

Inactive Publication Date: 2013-12-04
武汉椿岭科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two main methods for the synthesis of traditional 1,3-dioxane organic compounds, one is to use 1,3-diol and formaldehyde as raw materials, under acid catalysis, carry out condensation reaction to obtain, but This method is costly; another method uses olefins and formaldehyde as raw materials and obtains them through condensation reaction under the catalysis of sulfuric acid. This method has large pollution, serious equipment corrosion, and a small selection range of raw materials.

Method used

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  • Synthetic method of 1, 3-dioxane type organic compounds

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: (a) Use deionized 37wt% industrial formaldehyde and butane containing 50wt% 1-butene as raw materials, and send them into the first-stage catalytic fixed-bed reactor A1 at a molar ratio of 1.8:1, and the reaction temperature is 100 ℃, the reaction pressure is 2MPa, and the reaction is catalyzed by macroporous strongly acidic polystyrene cation exchange resin;

[0024] (b) The reaction liquid extracted from the first-stage catalytic fixed-bed reactor A1 is sent to the first-stage extraction and separation tower C1, and the extracted oil phase is sent to the separation tower B for separation. The temperature of the tower bottom is 163 ° C, and the temperature of the top of the tower is 48 ° C. The pressure is 0.45MPa; the extracted aqueous phase is sent to the second-stage catalytic fixed-bed reactor A2, the reaction temperature is 105°C, and the reaction pressure is 2MPa, and the reaction is catalyzed by macroporous strongly acidic polystyrene cation exchange...

Embodiment 2

[0028] Example 2 (a) With deionized 37wt% industrial formaldehyde and butane containing 50wt% 2-butene as raw material, send it into the first-stage catalytic fixed-bed reactor A1 at a molar ratio of 1.8:1, and the reaction temperature is 100°C, the reaction pressure is 2MPa, and the reaction is catalyzed by macroporous strongly acidic polystyrene cation exchange resin;

[0029] (b) The reaction liquid extracted from the first-stage catalytic fixed-bed reactor A1 is sent to the first-stage extraction and separation tower C1, and the mixed material that is left over from the reaction and separated and replenished by the separation tower B is used for extraction and separation, and the resulting oil phase is extracted Sent to the separation tower B for separation, the temperature of the tower kettle is 163°C, the temperature of the tower top is 48°C, and the pressure is 0.45MPa; the extracted aqueous phase is sent to the second-stage catalytic fixed-bed reactor A2, the reaction...

Embodiment 3

[0033] Example 3 : ： (a) Use deionized 37wt% industrial formaldehyde, butane containing 25wt% 1-butene and 25wt% 2-butene as raw materials, and send them into the first-stage catalytic fixed-bed reactor at a molar ratio of 1.8:1 A1, the reaction temperature is 100°C, the reaction pressure is 2MPa, and the reaction is catalyzed by macroporous strongly acidic polystyrene cation exchange resin;

[0034] (b) The reaction liquid extracted from the first-stage catalytic fixed-bed reactor A1 is sent to the first-stage extraction and separation tower C1, and the mixed material that is left over from the reaction and separated and replenished by the separation tower B is used for extraction and separation, and the resulting oil phase is extracted Sent to the separation tower B for separation, the temperature of the tower kettle is 163°C, the temperature of the tower top is 48°C, and the pressure is 0.45MPa; the extracted aqueous phase is sent to the second-stage catalytic fixed-bed r...

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Abstract

The invention relates to a synthetic method of 1, 3-dioxane type organic compounds. The synthetic method comprises: taking industrial formaldehyde and butylene-containing four-carbon hydrocarbons as raw materials, under the effect of a solid acidic resin catalyst, performing a reaction in a secondary fixed catalytic bed and extraction and rectification, reacting formaldehyde with butylenes for a condensation reaction to obtain the 1, 3-dioxane type organic compounds. The effective content of butylenes in the four-carbon hydrocarbons is 15 wt% or more, conjugated diene content is 2000 ppm or less, the butylenes is one or a mixture of 1-butylene, 2-butylene or isobutylene with any proportions, and the formaldehyde is subjected to deionization processing. The method has the advantages of wide raw material source, green and environment-friendly catalyst, high reactant conversion rate, high reaction selectivity, simple operation, easily-separable product and applicability to continuous industrial production.

Description

technical field [0001] The invention relates to a synthesis method of a cyclohexane organic compound, in particular to a synthesis method of a 1,3-dioxane organic compound. Background technique [0002] 1,3-dioxane organic compound is a kind of organic compound with wide application, it is a kind of solvent with excellent performance, and it is also a kind of important chemical intermediate and fuel additive, which is widely used in the synthesis of bulk chemicals such as Isoprene, solvents for paint inks, fuel additives such as diesel, etc. There are two main methods for the synthesis of traditional 1,3-dioxane organic compounds, one is to use 1,3-diol and formaldehyde as raw materials, under acid catalysis, carry out condensation reaction to obtain, but The cost of this method is high; another method uses olefins and formaldehyde as raw materials, which are obtained through condensation reaction under the catalysis of sulfuric acid. This method has large pollution, seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D319/06
Inventor 刘新泰司君华黄胜飘徐德超宋琪
Owner 武汉椿岭科技有限公司
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