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Method for synthesizing 1,4-butanediol

A technology of butanediol and diacetoxybutene, applied in chemical instruments and methods, preparation of organic compounds, preparation of oxygenated compounds, etc., can solve the problems of low yield and selectivity of 4-butanediol

Active Publication Date: 2019-10-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of low yield and selectivity of 1,4-butanediol, and a new method for synthesizing 1,4-butanediol is provided, which has 1,4-butanediol Features of high alcohol yield and high selectivity

Method used

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  • Method for synthesizing 1,4-butanediol
  • Method for synthesizing 1,4-butanediol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Preparation of hydrogenation catalyst:

[0044] ① Ammonium chloroplatinite ((NH 4 ) 2 PtCl 4 ) is dissolved in the hydrochloric acid aqueous solution that concentration is 8wt%, obtains impregnation solution 200ml, and 1L diameter 3mm, length 2cm, pore volume are 0.80cm 3 / g, the specific surface area is 1200cm 2 The coal-based cylindrical activated carbon carrier of / g is impregnated in the above-mentioned impregnating liquid, obtains catalyst precursor I;

[0045] ② Standing and aging for 24 hours to obtain catalyst precursor II;

[0046] ③ with a concentration of 8% (in N 2 h 4 ·H 2 The 500ml hydrazine hydrate of (2 weight ratio) reduces catalyst precursor II for 3h, obtains catalyst precursor III;

[0047] ④ washed with water to no chloride ion, dried at 50°C for 4 hours to obtain catalyst precursor IV;

[0048] ⑤ impregnating 180 ml of an aqueous solution of rubidium acetate (RbOAc) containing 2.10 g of Rb on the catalyst precursor IV, and drying at 110° C...

Embodiment 2

[0054] Preparation of hydrogenation catalyst:

[0055] ① Ammonium chloroplatinite ((NH 4 ) 2 PtCl 4 ) is dissolved in the hydrochloric acid aqueous solution that concentration is 8wt%, obtains impregnation solution 200ml, and 1L diameter 3mm, length 2cm, pore volume are 0.80cm 3 / g, the specific surface area is 1200cm 2 The coal-based cylindrical activated carbon carrier of / g is impregnated in the above-mentioned impregnating liquid, obtains catalyst precursor I;

[0056] ② Standing and aging for 24 hours to obtain catalyst precursor II;

[0057] ③ with a concentration of 8% (in N 2 h 4 ·H 2 The 500ml hydrazine hydrate of (2 weight ratio) reduces catalyst precursor II for 3h, obtains catalyst precursor III;

[0058] ④ washed with water to no chloride ion, dried at 50°C for 4 hours to obtain catalyst precursor IV;

[0059] ⑤ Zinc citrate containing 2.10g Zn (Zn 3 (C 6 h 5 o 7 ) 2 2H 2 O) 180ml of aqueous solution was impregnated on the catalyst precursor IV, and...

Embodiment 3

[0089] Preparation of hydrogenation catalyst:

[0090] ① Ammonium chloroplatinite ((NH 4 ) 2 PtCl 4 ) is dissolved in the hydrochloric acid aqueous solution that concentration is 8wt%, obtains impregnation solution 200ml, and 1L diameter 3mm, length 2cm, pore volume are 0.80cm 3 / g, the specific surface area is 1200cm 2 The coal-based cylindrical activated carbon carrier of / g is impregnated in the above-mentioned impregnating liquid, obtains catalyst precursor I;

[0091] ② Standing and aging for 24 hours to obtain catalyst precursor II;

[0092] ③ with a concentration of 8% (in N 2 h 4 ·H 2 The 500ml hydrazine hydrate of (2 weight ratio) reduces catalyst precursor II for 3h, obtains catalyst precursor III;

[0093] ④ washed with water to no chloride ion, dried at 50°C for 4 hours to obtain catalyst precursor IV;

[0094] ⑤The cadmium acetate containing 2.10g Cd (Cd(OA C ) 2 2H 2 O) Dissolved in an aqueous solution of 10 wt% acetic acid to obtain 180 ml of impregn...

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Abstract

The invention relates to a method for synthesizing 1,4-butanediol and mainly aims to solve the problem that, in the prior art, 1,4-butanediol is poor in yield and selectivity after 1,4-diacetoxybutaneis hydrolyzed because 1,4-diacetoxy butylene is poor in yield and selectivity after hydrogenation. The method for synthesizing 1,4-butanediol comprises the following steps: by taking butadiene, butadiene and oxygen as raw materials, performing an acetylation reaction in the presence of an acetylation catalyst so as to obtain 1,4-diacetoxy butylene; in the presence of a hydrogenation catalyst, enabling hydrogen to react with 1,4-diacetoxy butylene so as to obtain 1,4-diacetoxybutane; hydrolyzing 1,4-diacetoxybutane, thereby obtaining 1,4-butanediol, wherein the hydrogenation catalyst comprisesactivated carbon as a carrier and active components including a Pt element and a promoter element; the promoter element comprises at least one metal element of IA group metals and at least one metalelement of IIB group metals.

Description

technical field [0001] The present invention relates to a method for synthesizing 1,4-butanediol. Background technique [0002] 1,4-Butanediol (1,4-BDO) is an important organic and fine chemical raw material, which is widely used in the fields of medicine, chemical industry, textile, papermaking, automobile and daily chemical industry. It can derive a series of high value-added fine chemical products. For example, tetrahydrofuran (THF), polybutylene terephthalate (PBT), γ-butyrolactone (GBL) and polyurethane resin (PU Resin) can be produced from 1,4-BDO, especially as the production of PBT engineering The basic raw material of plastic and PBT fiber has received extensive attention from research institutions. [0003] There are many process routes for the preparation of 1,4-butanediol. From the raw materials used, there are acetylene, ethylene, propylene, butadiene and maleic anhydride and other raw material routes. The same raw materials also have different synthesis proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/20C07C27/02B01J23/58B01J23/60B01J35/10
CPCC07C29/095C07C67/055C07C67/283B01J23/58B01J23/60B01J35/618B01J35/635C07C31/207C07C69/16
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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