# US 4,394,233 A · Process for preparing ethyl .alpha.-chloroethyl carbonate

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- Number: US 4,394,233 A
- Document ID: US4394233A
- Status: Granted
- Kind: A
- Application number: 06/287,641
- Filed: 1981-07-28
- Granted: 1983-07-19
- Earliest claimed: 1980-12-23
- Assignees: Korea Advanced Institute of Science and Technology
- Inventors: Sang-Woo Park
- Web page: https://patentgrep.com/patent/US4394233A

## CPC

- C07C 68/06: from organic carbonates
- B01J 19/12: employing electromagnetic waves
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

Diethylcarbonate is chlorinated with dry chlorine gas in the presence of ultraviolet rays to give ethyl .alpha.-chloroethyl carbonate in a good yield. The chlorination is preferably carried out, with or without a carbon tetrachloride solvent as a reaction medium, at a range of temperature of 45.degree. to 55.degree. C.

## Claims

### Claim 1

A process for preparing ethyl .alpha.-chloroethyl carbonate having the formula: ##STR7## which comprises chlorinating diethylcarbonate having the formula: ##STR8## with chlorine gas in the presence of ultraviolet radiation.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the reaction temperature ranges from 45.degree. C. to 55.degree. C.

### Claim 3 (depends on 1)

The process according to claim 1, wherein the amount of chlorine gas used is 1.2 to 1.4 moles per mole of diethylcarbonate employed as a starting material.

### Claim 4 (depends on 1)

The process according to claim 1, wherein carbon tetrachloride is employed as a reaction medium during chlorination.

### Claim 5

A process for preparing ethyl .alpha.-chloroethyl carbonate, comprising chlorinating diethylcarbonate with 1.2 to 1.4 moles of chlorine gas per mole of diethylcarbonate in a carbon tetrachloride reaction medium maintained at a temperature in the range of 45.degree. C. to 55.degree. C. in the presence of ultraviolet radiation.