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Process and device for preparing 1,6-hexanediol

A technology of hexanediol and process, applied in 1 field, can solve the problems such as the lack of large-scale production enterprises, and achieve the effects of saving costs, avoiding potential safety hazards, and avoiding waste of resources

Inactive Publication Date: 2015-11-18
FUSHUN EAST CHINA ENERGY TECH R & D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Japan's Ube Corporation has built a 1,6-hexanediol production line of 10,000 tons in Spain, while Eastern Europe, Southeast Asia and my country have not formed large-scale production enterprises

Method used

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  • Process and device for preparing 1,6-hexanediol

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Embodiment 1

[0047] This embodiment provides a kind of technique for preparing 1,6-hexanediol, comprising the following steps:

[0048] A. Esterification reaction: 1,6-adipic acid and methanol are prepared in a weight ratio of 1:1 and then added to the esterification reactor, and the esterification reaction occurs under the action of the esterification reaction catalyst and activated carbon; activated carbon The dosage is 0.05~0.2% of the total weight of raw materials, preferably 0.1%; the reaction temperature is 115~118°C, the reaction pressure is 0.3~0.5Mpa, and the reaction time is 8 hours. After the raw materials are completely reacted, adipic acid containing The reaction solution of dimethyl ester;

[0049] B. Alkalinity adjustment: the reaction solution containing dimethyl adipate obtained in step A is added in a neutralization reactor, and neutralized with an alkali solution to obtain a reaction solution with a pH value of 6.5 to 7;

[0050] C. Distillation: The reaction solution w...

Embodiment 2

[0057] Such as figure 1 As shown, a device for preparing 1,6-hexanediol is provided in this embodiment, so as to be applicable to the process for preparing 1,6-hexanediol in Example 1, which includes: esterification Reaction device and hydrogenation reaction device.

[0058] The esterification reaction device includes a mixing tank 101, a first feed pump 102, an esterification reactor 118, a neutralization pump 103, a neutralization reactor 104, a first methanol removal pump 105, and a methanol removal distillation tower 117 connected in sequence , dehydration pump 106, dehydration distillation tower 114, degreasing pump 107 and degreasing distillation tower 108; The top of demethanol distillation tower 117 is provided with the first condenser 116 that is connected with methanol collection tank 115, and the top of dehydration distillation tower 114 is provided with The second condenser 113 connected with the water collection tank 112, the third condenser 111 connected with th...

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Abstract

The invention relates to a process and a device for preparing 1,6-hexanediol, and belongs to the technical field of 1,6-hexanediol preparation. The process comprises the following steps: A, esterification reaction; B, alkalinity adjustment; C, distillation; D, hydrogenation reduction; E, hydrogen recycle; F, distillation. The device for preparing 1,6-hexanediol comprises an esterification reaction device and a hydrogenation reaction device. According to the process and the device for preparing 1,6-hexanediol, firstly, 1,6-hexanedioic acid and methanol are used as raw materials, and are subjected to esterification reaction in the esterification reaction device to obtain dimethyl adipate, then dimethyl adipate and hydrogen are subjected to reduction reaction in the hydrogenation reaction device to finally obtain 1,6-hexanediol, the chromatogram content of 1,6-hexanediol is greater than 99.5%, and the industrialized production of 1,6-hexanediol is realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of 1,6-hexanediol, and in particular relates to a process and a device for preparing 1,6-hexanediol. Background technique [0002] With the rapid development of petrochemical, fine chemical industry and clothing industry, the scope of application of new products synthesized with 1,6-hexanediol is constantly expanding, and the demand for 1,6-hexanediol in my country is increasing rapidly. The annual import volume Increase by 15% or more. [0003] Today's global hexanediol market is monopolized by Germany's BASF (BASF), Lanxess (formerly Bayer) and Japan's Ube. BASF of Germany has a production capacity of 50,000 tons per year in Freeport, Texas, USA and Ludwigshafen, Germany. Japan's Ube Corporation has built a 1,6-hexanediol production line of 10,000 tons in Spain, while Eastern Europe, Southeast Asia and my country have not formed large-scale production enterprises. The production technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/149
CPCC07C67/08C07C29/149C07C69/44C07C31/20
Inventor 范春燕赵剑龙
Owner FUSHUN EAST CHINA ENERGY TECH R & D CO LTD
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