Technique for hydrogenation production of dimethyl succinate by using intermediate product of 1,4-butanediol device

A technology of dimethyl succinate and a process method, applied in the field of preparing dimethyl succinate, can solve the problems of complicated procedures, no industrialized embodiment, large investment in esterification, etc., and achieves simple process and reduced investment. Cost, effect of low-cost production

Inactive Publication Date: 2014-12-10
NINGBO ZHETIE JIANGNING CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process requires two-step reactions, and the process is cumbersome; and the esterification part requires a lot of investment, so far there is no industrialized embodiment

Method used

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  • Technique for hydrogenation production of dimethyl succinate by using intermediate product of 1,4-butanediol device
  • Technique for hydrogenation production of dimethyl succinate by using intermediate product of 1,4-butanediol device
  • Technique for hydrogenation production of dimethyl succinate by using intermediate product of 1,4-butanediol device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The content of each component of the intermediate product dimethyl maleate, dimethyl fumarate, dimethyl methoxysuccinate and methanol mixture in the esterification tower of the maleic anhydride method BDO plant is shown in Table 1 , the specific reaction conditions are shown in Table 2, and the reaction products and the contents of each component are shown in Table 3. After calculation, the reaction conversion rate of this embodiment is 98.6%, and the selectivity is 99.0%.

[0022]

[0023] (Table 1)

[0024]

[0025] (Table 2)

[0026] components

[0027] (table 3)

Embodiment 2

[0029] The content of each component of the intermediate product dimethyl maleate, dimethyl fumarate, dimethyl methoxysuccinate and methanol mixture in the esterification tower of the maleic anhydride method BDO plant is shown in Table 4, and the specific reaction conditions See Table 5, and see Table 6 for the reaction product and the contents of each component. After calculation, the reaction conversion rate of this embodiment is 99.2%, and the selectivity is 98.2%.

[0030]

[0031] (Table 4)

[0032]

[0033] (table 5)

[0034] components

[0035] Dimethyl succinate (DMS)

[0036] (Table 6)

Embodiment 3

[0038] The content of each component of the intermediate product dimethyl maleate, dimethyl fumarate, dimethyl methoxysuccinate and methanol mixture in the esterification tower of the maleic anhydride method BDO plant is shown in Table 7, and the specific reaction conditions See Table 8, and see Table 9 for the reaction product and the contents of each component. After calculation, the reaction conversion rate of this embodiment is 100%, and the selectivity is 99.4%.

[0039]

[0040] (Table 7)

[0041]

[0042] (Table 8)

[0043] components

[0044] (Table 9)

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Abstract

The invention discloses a technique for hydrogenation production of dimethyl succinate by using an intermediate product of 1,4-butanediol device. Particularly, the invention invents a new production process of dimethyl succinate. The technique disclosed by the invention comprises the following steps: generating a mixture of dimethyl succinate and methanol by hydrogenation production of an intermediate product generated after esterification reaction in a maleic anhydride method BDO device, wherein the intermediate product is a mixture of dimethyl maleate, dimethyl fumarate, dimethyl methoxy butyl diacid and methanol; carrying out distillation separation on the mixture, thus preparing a polymer-grade dimethyl succinate product of which the purity reaches 99.95% or above. According to the technique, an esterification part device of the maleic anhydride method BDO and a hydrogen compressor are directly utilized, the productive investment of dimethyl succinate is reduced and good economic benefits can be obtained.

Description

technical field [0001] The invention relates to a method for preparing dimethyl succinate. Background technique [0002] Dimethyl succinate is a fine product with high added value, mainly used in the production of quinacridone pigment intermediate dimethyl succinate (DMSS ester), synthetic light stabilizer 622, direct use Used as surfactant, synthetic pharmaceutical intermediate, bactericide and industrial essence, etc. [0003] The traditional synthesis process of dimethyl succinate is synthesized by the esterification reaction of succinic acid and methanol. The reaction speed of dimethyl succinate is slow, the reaction is difficult to carry out thoroughly, and there are many reaction by-products, which make the separation and purification of the product difficult. In addition, to maintain a high esterification rate, the acidic resin catalyst requires a high alkyd ratio, high raw material consumption, and high corrosiveness of raw materials, which has no advantages in ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/303C07C69/40
CPCC07C67/303C07C67/54
Inventor 窦和瑞周强毕文君徐晓航华港闫静毛建忠
Owner NINGBO ZHETIE JIANGNING CHEM
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