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Method and device for preparing anisole by etherifying iodomethane

A technology of methyl iodide and anisole, which is applied in the field of preparing anisole by etherification of methyl iodide, can solve problems such as high cost, serious environmental pollution, and high safety risk, and achieves low environmental and human hazards, high product yield, The effect of reducing production costs

Inactive Publication Date: 2018-07-24
深圳市前海博扬研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the traditional anisole preparation process has the problems of large safety risks, serious environmental pollution, and high cost, thereby proposing a green, environmentally friendly, mild reaction condition, and low-cost methyl iodide etherification preparation The method of anisole and the device used for the method

Method used

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  • Method and device for preparing anisole by etherifying iodomethane
  • Method and device for preparing anisole by etherifying iodomethane
  • Method and device for preparing anisole by etherifying iodomethane

Examples

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Embodiment 1

[0027] The present embodiment provides a kind of method that methyl iodide etherification prepares anisole, and it comprises the steps:

[0028] S1. To prepare methyl iodide, potassium iodide and methanol are put into the first reaction kettle 1 with a split device according to the mass ratio of 1:0.2. The initial temperature of the potassium iodide and methanol is 80°C, and then gradually warms up to 110°C. Simultaneously in described first reactor 1, drop phosphoric acid, the dripping amount of phosphoric acid is 1.2 times of potassium iodide, i.e. the mass ratio of potassium iodide, methyl alcohol, phosphoric acid is 1:0.2:1.2, and the mass concentration of described phosphoric acid is 85% , after dropping phosphoric acid, react for 3h, until there is no more distillate distillate, wash the distillate, and vacuum dry to remove the moisture in the distillate, to obtain methyl iodide liquid, its purity is 95%, and a small amount of By-product dipotassium hydrogen phosphate. ...

Embodiment 2

[0034] The present embodiment provides a kind of method that methyl iodide etherification prepares anisole, and it comprises the steps:

[0035] S1. To prepare methyl iodide, potassium iodide and methanol are put into the first reactor 1 with a split device according to the mass ratio of 1:0.4. The initial temperature of the potassium iodide and methanol is 80°C, and then gradually warms up to 110°C. Simultaneously in described first reactor 1, drop phosphoric acid, the dripping amount of phosphoric acid is 2.4 times of potassium iodide, i.e. the mass ratio of potassium iodide, methyl alcohol, phosphoric acid is 1:0.4:2.4, and the mass concentration of described phosphoric acid is 85% , after dripping phosphoric acid, react for 5h, until no distillate distills out, wash the distillate, and vacuum dry to remove the moisture in the distillate, obtain methyl iodide liquid, its purity is 94%, and a small amount of By-product dipotassium hydrogen phosphate.

[0036] S2, methyl iod...

Embodiment 3

[0041] The present embodiment provides a kind of method that methyl iodide etherification prepares anisole, and it comprises the steps:

[0042] S1. To prepare methyl iodide, potassium iodide and methanol are put into the first reaction kettle 1 with a split device according to the mass ratio of 1:0.3. The initial temperature of the potassium iodide and methanol is 80°C, and then gradually warms up to 110°C. Simultaneously in described first reactor 1, drop phosphoric acid, the dropping amount of phosphoric acid is 1.8 times of potassium iodide, i.e. the mass ratio of potassium iodide, methyl alcohol, phosphoric acid is 1:0.3:1.8, and the mass concentration of described phosphoric acid is 85% , after dripping phosphoric acid, react for 4h, until no distillate distills out, wash the distillate, and vacuum-dry to remove the moisture in the distillate, obtain iodomethane liquid, its purity is 95.5%, also obtain a small amount By-product dipotassium hydrogen phosphate.

[0043] S...

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Abstract

The invention discloses a method for preparing anisole by etherifying iodomethane. The method comprises the steps of preparing iodomethane and preparing anisole through joint reaction of iodomethane,phenol and potassium hydroxide, the raw materials adopted in the method and the obtained products are nontoxic or low toxic, cause small harm to the environment and the physical body, the reaction condition is mild, the yield of the products is high, and the obtained monopotassium phosphate side products can be used in medical industry, can serve as a pH adjusting agent, a water quality treating agent, a metal phosphorization treating agent and an electroplating additive. When aliphatic ether is adopted as a raw material, fatty alcohol with high value can further be generated, the production method has high added value, and the production cost is reduced greatly. The invention further discloses a device for achieving the method, the device is simple in structure, each level of products andby-products can be obtained in sequence, and the device is suitable for industrialized scale production of anisole.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis and relates to a method for preparing anisole, in particular to a new method for preparing anisole by etherification of methyl iodide and a device used in the method. Background technique [0002] Anisole is also known as anisole and methoxybenzene, and its structural formula is: It has an anise-like aroma and is an important organic chemical raw material and synthetic intermediate. It can not only be used in the synthesis of spices and pesticides, but also can be used as a solvent, extractant, antioxidant, ethylene polymer UV stabilizer, etc. . [0003] The traditional preparation method of anisole comprises adopting bromobenzene and methanol to react under strong alkaline environment, or sodium phenate and methyl chloride react etc. in the presence of ammoniacal liquor. At present, the mainstream production method of anisole in the industry is mainly to obtain sodium phenate throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/16C07C19/07C07C41/01C07C43/205C01B25/30B01J19/18B01J4/00
CPCB01J4/001B01J19/0046B01J19/1862C01B25/308C07C17/16C07C19/07C07C41/01C07C43/205
Inventor 徐辑亮肖增钧傅兵傅浩
Owner 深圳市前海博扬研究院有限公司