Process for preparing hexachlorocyclopentadiene
US4233251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1979 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jun 18, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the production of hexachlorocyclopentadiene comprising the steps of: PA1 (a) reacting liquid cyclopentadiene and chlorine at a temperature of from about 0 to about 100 degrees centigrade until a minimum of four chlorine atoms has been added per mole of cyclopentadiene to form a first-stage product; PA1 (b) heating the resultant liquid reaction product of step (a) in a second stage at a temperature of from about 140 degrees centigrade to below about 200 degrees centigrade with chlorine in the presence of from about 0.0001 percent to about 5.0 percent (by weight) of a phosphorus compound until the reaction products of step (a) contain an average of about six chlorine atoms per molecule, based on cyclopentadiene starting material, wherein said phosphorus compound is ##STR1## wherein a, b, c, d, e, f, and g are integers independently selected from the group consisting of 0 and 1, and R.sup.1, R.sup.2, and R.sup.3, are independently selected from the group consisting of hydrogen, hydroxyl, flourine, chlorine, bromine, iodine, alkyl containing from about 1 to 12 carbon atoms, phenyl, and halophenyl; PA1 (c) vaporizing and heating the resulting reaction pr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.