A kind of method for synthesizing 1,6-hexanediol by gas-phase hydrogenation of dimethyl adipate

A technology of dimethyl adipate and hexanediol, applied in 1 field, can solve problems such as difficult handling of lead-containing guard beds, and achieve the effects of improving physical properties and catalytic properties, mild reaction conditions and strong penetrating ability
CN101531568BActive Publication Date: 2011-12-07WANHUA CHEM GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2011-12-07

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Abstract

The invention discloses a method for synthesizing 1,6-hexanediol by gas-phase hydrogenation of dimethyl adipate. The preparation of the hydrogenation catalyst used in the method comprises the following steps: adding a mesoporous silicon oxide carrier and a copper-containing Aqueous salt solution, stirred, evaporated to dryness by microwave, dried by microwave and calcined to obtain hydrogenation catalyst. In addition, the preparation of the protective bed used to remove the impurity gas in hydrogen in the method of the present invention comprises the following steps: active carbon carrier, and alkali metal salt or / and alkaline earth metal calcium salt are formulated into an aqueous solution in proportion, stirred, microwave evaporated to dryness, microwave dried Roasting under the protection of an inert gas; a high-performance guard bed is obtained, which contains: 5-90wt% activated carbon, 10-95wt% potassium oxide and calcium oxide, and the method of the invention greatly improves the physical properties and catalytic performance of the catalyst.
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Description

technical field

[0001] The invention relates to the synthesis of 1,6-hexanediol, in particular to a method for synthesizing 1,6-hexanediol by gas-phase hydrogenation of dimethyl adipate in the presence of a catalyst. Background technique

[0002] 1,6-Hexanediol is an important basic organic synthesis raw material that has developed rapidly in recent years. Due to the longer carbon chain, the polyester or polyurethane synthesized from it has more balanced physical properties than other short-chain diols, such as ethylene glycol or propylene glycol and 1,4-butanediol. . 1,6-Hexanediol is mainly used in the production of high-quality polyurethane elastomer resin, polyurethane adhesive, polyester plasticizer, UV-curable coating, high-grade water-soluble resin coating, polycarbonate, pharmaceutical intermediates And food additives, in addition, 1,6-hexanediol is also widely used in the production of hair styling agents, gelatin and plasticizers for coating in photographic films...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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