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Catalytic hydrogenation and decoloration method of 1,4-butanediol

A technology for catalytic hydrogenation and butanediol, applied in chemical instruments and methods, organic chemistry, preparation of hydroxyl compounds, etc., can solve the problem that the appearance quality and hue index cannot meet the requirements of qualified products, the quality of products is reduced, and the quality of products is reduced. Downgrade and other problems, to achieve the effect of increasing the product quality rate, reducing product chroma, and improving product quality

Inactive Publication Date: 2016-03-23
SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the production process of 1,4-butanediol, the quality of high-grade products may be reduced due to the influence of chromaticity; especially when the device is running for a long time and the reaction catalyst is used to the end, the appearance quality and hue of 1,4-butanediol The indicators are likely to fail to meet the requirements of qualified product standards, resulting in product degradation, etc.

Method used

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  • Catalytic hydrogenation and decoloration method of 1,4-butanediol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh 2g of Pd-C catalyst (loading capacity 0.5%) and add it into the reactor; weigh 200mL of BDO (number sample A) and add it into the reactor. H was introduced into the reactor 2 Increase the pressure to 2MPa, heat to 110°C and stir, react for 3 hours, stop stirring, filter to obtain decolorized BDO, and use a colorimeter to analyze the color of decolorized BDO (sample number B). The analysis data of samples A and B are compared in Table 1.

Embodiment 2

[0016] Weigh 2g of loaded Pd molecular sieve catalyst (loading capacity 5%), add it to the reactor, measure 200mL of BDO (number sample A) and add it to the reactor, and feed H into the reactor. 2 Increase the pressure to 2MPa, heat to 90°C and stir, react for 3 hours, stop stirring, filter to obtain decolorized BDO, use a colorimeter to analyze the color of decolorized BDO (sample number C), and compare the analysis data of sample C in Table 1.

Embodiment 3

[0018] Weigh 3g platinum loaded Al 2 o 3 Catalyst (loading capacity 10%) was added to the reactor, and 300mL of BDO (number sample A) was measured and added to the reactor, and H was introduced into the reactor. 2 Increase the pressure to 3MPa, heat to 80°C and stir, react for 3 hours, stop stirring, filter to obtain decolorized BDO, use a colorimeter to analyze the color of decolorized BDO (sample number D), and compare the analysis data of sample D in Table 1.

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Abstract

The invention relates to a catalytic hydrogenation and decoloration method of 1,4-butanediol. The catalytic hydrogenation and decoloration method of the 1,4-butanediol comprises the following process steps that a catalyst and a 1,4-butanediol solution are added to a reaction container, hydrogen gas is led into the container, reaction is performed under the conditions of the pressure of 0.1-20 MPa and the temperature of 30-180 DEG C, and then filtering is performed. The method adopting the carrier-supported precious metal catalyst to perform catalytic BDO hydrogenation is used for decoloration treatment of the 1,4-butanediol, and the method is simple and reliable. By utilizing the method, the chromaticity of BDO products can be effectively reduced, the quality of the BDO products can be improved, the premium grade rate of the products can be improved, the products can be popularized to the high-end application field of TPU and the like after the BDO chromaticity is reduced, the added value of the products can be increased, and the economic benefits can be improved.

Description

technical field [0001] The invention belongs to the application field of coal chemical industry, and in particular relates to a 1,4-butanediol catalytic hydrogenation decolorization method. Background technique [0002] 1,4-Butanediol (BDO) is an important basic organic chemical and fine chemical raw material. It has a wide range of uses, especially its derivatives are fine chemical products with high added value, and are widely used in solvents, medicines, cosmetics, plasticizers, curing agents, pesticides, rust removers, artificial leather, fibers, engineering pigments, etc. BDO is also used in the manufacture of tetrahydrofuran (THF), γ-butyrolactone (GBL), N-methylpyrrolidone (NMP), etc. Since the 1970s, due to the rapid development of polyurethane industry and polybutylene terephthalate (PBT) engineering plastics, the development of BDO has been promoted. In recent years, PBT engineering plastics and PBT fibers are widely used in automobile, machinery, electronics and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/90C07C31/20
CPCC07C29/90
Inventor 王玉丽刘新文唐元
Owner SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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