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Method for preparing 1-chloro-2-methyl-2-propanol

A technology of methyl and propanol, which is applied in the preparation of hydroxyl addition, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of increasing production costs, high prices, and uneconomical promotion of enterprise products. and other problems to achieve the effect of reducing the generation of by-products

Inactive Publication Date: 2011-11-02
宁波尖锋紫星生物科技有限公司
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  • Description
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  • Application Information

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Problems solved by technology

However, the high price of p-toluenesulfonic acid as a reaction raw material will increase production costs, which is not cost-effective for enterprise product promotion

Method used

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  • Method for preparing 1-chloro-2-methyl-2-propanol

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Embodiment

[0018] First the cation exchange resin is filled in the filling tube, and there are two feeding ports at one end of the filling tube, one is the feeding port of water inlet, and the other is the feeding port of entering 3-chloro 2-methylpropene; then the Water is injected (by a pump) into the filling tube filled with cation exchange resin from the water feeding port of the filling tube. Here, the filling tube is a filling tube with a length of 1 meter and a diameter of 30 cm; the filling tube is placed horizontally;

[0019] Maintain the flow rate of water added to the filling pipe at 10L / h until the filling pipe is completely filled with water (that is, the water is evenly filled), and then feed water and 3-chloro-2-methylpropene from the two feed ports respectively. Use a pump to inject into the filling tube filled with cation exchange resin; cool the outside of the filling tube with a 0°C ice-water mixture to ensure that the temperature inside the filling tube is between 0 a...

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Abstract

The invention discloses a method for preparing 1-chloro-2-methyl-2-propanol. The method disclosed by the invention is characterized by comprising the following preparation steps: filling cation exchange resins into a filling pipe, wherein the length of the filling pipe filled with the cation exchange resins is 0.1-100 meters and the diameter of the filling pipe is 0.1-0.5 meter; respectively adding a reaction raw material, namely 2-methyl-3-chloropropene and water to the filling pipe from two feed ports of the filling pipe; cooling the exterior of the filling pipe to 0-45 DEG C, wherein the flow rate of the 2-methyl-3-chloropropene is 0.5-20kg / h and the flow rate of the water is 1-100L / h; and receiving a reaction liquid which flows out of the pipe. The preparation method disclosed by the invention has the advantages that a reaction is completed in one step; the production cost is low; a large quantity of acid waste water is not generated; and the pollution and damage to an environment are reduced.

Description

technical field [0001] The present invention relates to a new technique for synthesizing 1-chloro-2-methyl-2-propanol using solid cation exchange resin as an acidic catalyst. Sulfuric acid, the two-step reaction is completed at one time. During the production process, the generation of acidic wastewater is greatly reduced, which is in line with the production concept of green environmental protection. Specifically, it is a preparation method of 1-chloro-2-methyl-2-propanol . Background technique [0002] 1-Chloro-2-methyl-2-propanol is an important intermediate of medicine lercanidipine, and also an important raw material of various chemical raw materials. At present, the production technology of 1-chloro-2-methyl-2-propanol is mostly after using 80% concentrated sulfuric acid catalytic reaction, and then hydrolysis obtains target product (Industrial and Engineering Chemistry, Vol 33, No.3, 1941), see Reaction 1 below. In the production process of this method, the acquisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/36C07C29/04B01J31/08
Inventor 杨建军余魏峰
Owner 宁波尖锋紫星生物科技有限公司
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