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Method for preparing cyclohexyl acetate and method for preparing cyclohexanol ethanol

A technology of cyclohexyl acetate and acetic acid, applied in the preparation of carboxylate, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve problems such as no information disclosure, and achieve the effect of high selectivity of cyclohexyl acetate

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Known from the published literature, there is no information disclosure about the hydrogenation of cyclohexyl acetate to co-produce cyclohexanol and ethanol in the prior art

Method used

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  • Method for preparing cyclohexyl acetate and method for preparing cyclohexanol ethanol
  • Method for preparing cyclohexyl acetate and method for preparing cyclohexanol ethanol
  • Method for preparing cyclohexyl acetate and method for preparing cyclohexanol ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 500mL of macroporous strongly acidic hydrogen-type ion exchange resin (synthesized in the laboratory according to the classic literature method, suspension copolymerization of styrene solution containing 15% divinylbenzene to make white balls, and then sulfonated with concentrated sulfuric acid, measured Its exchange capacity is 5.2mmolH + / g dry basis) into the middle of the pre-reactor, and a certain amount of quartz sand is filled at both ends. In addition, the high-temperature-resistant sulfonic acid ion exchange resin (the brand is Amberlyst45, produced by Rhom&Hass Company) was crushed into a powder with a particle size of less than 200 mesh (0.074mm) with a multi-stage high-speed pulverizer, and pore-forming agents, lubricants, and antioxidants were added. The agent and adhesive are mixed evenly on a high-speed mixer, and then internally kneaded on an internal mixer at 180°C for 10 minutes to make the material completely plasticized, and then injected into a mold...

Embodiment 2

[0087] The configuration of reaction tower and catalyst is identical with embodiment 1. Only cyclohexene, cyclohexane and benzene mixture were used instead of cyclohexene for testing, and the pressure of the pre-reactor was 2.0MPa, and the reaction tower was operated under normal pressure. Adjust the heating capacity of the tower kettle and the top reflux flow to continuously react, and the reaction conditions and reaction results of the stable operating conditions are shown in Table 2 below.

Embodiment 3

[0089] Put 500mL φ3~4 spherical H 0.5 Cs 2.5 PW 12 o 40 / SiO 2 The catalyst is loaded in the middle of the pre-reactor, and a certain amount of quartz sand is filled at both ends. In addition, the ball type H of φ3~4 0.5 Cs 2.5 PW 12 o 40 / S 2 Catalyst (by H 0.5 Cs 2.5 PW 12 o 40 Powder and coarse-pore silica gel powder with a particle size of less than 200 meshes are fully mixed in a mixer, rolled into a ball in a sugar coating machine with silica sol as a bonding machine, and then dried and roasted) sandwiched into a titanium mesh wave In the plate, a cylindrical structured packing with a diameter of 50 mm and a height of 50 mm was made. Put this packing type catalyst L into the middle part of the model reaction tower (1m high, equivalent to 12 theoretical trays), and put 1950mL glass spring packing with a diameter of 4mm and a height of 4mm at the top and bottom (the filling height is 1m, equivalent to 12 theoretical plates). 15 theoretical plates). The cyclo...

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Abstract

The invention relates to a method for preparing cyclohexyl acetate. According to the method, addition esterification reaction on acetic acid and cyclohexene is performed by pre-esterification and reaction rectification; and the method has very high cyclohexene conversion rate and cyclohexyl acetate selectivity. The invention relates to a method for preparing cyclohexanol and ethanol, which comprises the following steps: carrying out addition esterification reaction on acetic acid and cyclohexene by using pre-esterification and reaction rectification to prepare the cyclohexyl acetate; and hydrogenating the cyclohexyl acetate to coproduce the cyclohexanol and ethanol.

Description

technical field [0001] The invention relates to a method for preparing cyclohexyl acetate and a method for preparing cyclohexanol and ethanol. Background technique [0002] Cyclohexyl acetate is a liquid with banana or apple aroma, and the fruity flavor prepared with it is widely used in food, beverage and cosmetic industries. In addition, cyclohexyl acetate has good solubility for resins, and is often used as an environmentally friendly solvent for high-grade paints and paints. [0003] At present, the synthetic method of cyclohexyl acetate in industry is the esterification reaction of acetic acid and cyclohexanol. The alkyd esterification reaction needs to be carried out smoothly under the action of an acidic catalyst. Song Guijia, Wu Xionggang (Chemical Propellants and Polymer Materials, 2009, V0l.7(2):P31-33), reviewed the progress in the synthesis of cyclohexyl acetate from acetic acid and cyclohexanol esterification, and the catalysts involved Including sulfonic aci...

Claims

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Application Information

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IPC IPC(8): C07C69/14C07C67/04C07C67/54C07C35/08C07C31/08C07C29/149B01J23/80B01J23/83B01J23/835
CPCC07C29/149C07C67/04C07C67/54C07C2601/14C07C69/14C07C35/08C07C31/08
Inventor 温朗友宗保宁慕旭宏俞芳郜亮董明会喻惠利杨克勇
Owner CHINA PETROLEUM & CHEM CORP
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