Elf Atochem S.a.

Arkema Inc.

Atofina

Benoit Requieme

Eric Lacroix

Andre Lantz

Bernard Cheminal

Sylvain Perdrieux

Xue Wang

Keith R Genco

Claire Jaubert

Stabilized thickened hydrogen peroxide containing compositions are disclosed. The compositions contain a stabilizer system made up of a stannate stabilizer, a phosphorus containing stabilizer or a mixture of phosphorus containing stabilizers; and an aromatic chelating agent or a mixture of aromatic chelating agents. The compositions are suitable for use as disinfectants, as cleaning agents, and in various personal care applications such as hair care and tooth whitening.

Stabilized thickened hydrogen peroxide containing compositions with a mixture of stabilizers

Stabilized thickened hydrogen peroxide containing compositions

Process for the manufacture of difluoromethane

The invention relates to the manufacture of difluoromethane by catalytic gas-phase fluorination of methylene chloride. The operation is carried out in the presence of oxygen at a temperature of between 330 and 450.degree. C. and with a bulk or supported chromium catalyst.

Synthesis of difluoromethane

In order to regenerate the activity of a catalyst for gas phase fluorination the spent catalyst is treated with chlorine and hydrogen fluoride, at a temperature of between 250.degree. and 450.degree. C.

Regeneration of catalysts for gas phase fluorination

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Charly, France

Benoit Requieme