A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.

A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.

The present invention relates to a process for treating aqueous effluents containing formaldehyde by distillation in the presence of acetic acid, in particular to a process for treating aqueous solutions resulting from the synthesis of acrylic acid. The invention also relates to the use of the purified aqueous solution in a process for producing acrylic acid by catalytic oxidation of propylene and/or propane in steam dilution.

The present invention relates to a process for treating aqueous effluents containing formaldehyde by distillation in the presence of acetic acid, in particular to a process for treating aqueous solutions resulting from the synthesis of acrylic acid. The invention also relates to the use of the purified aqueous solution in a process for producing acrylic acid by catalytic oxidation of propylene and/or propane in steam dilution.

The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl), methods of forming same, and methods of separating, or breaking, the azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl).

The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl), methods of forming same, and methods of separating, or breaking, the azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl).

The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl), methods of forming same, and methods of separating, or breaking, the azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl).

A process for preparing C.sub.5 aldehydes involves hydroformylation of butenes with synthesis gas in the presence of a homogeneous catalyst system and a solvent. It is a feature of the process that the aldehyde concentration in the reaction mixture is limited.

A process for preparing C.sub.5 aldehydes involves hydroformylation of butenes with synthesis gas in the presence of a homogeneous catalyst system and a solvent. It is a feature of the process that the aldehyde concentration in the reaction mixture is limited.

The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl), methods of forming same, and methods of separating, or breaking, the azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF.sub.3I) and trifluoroacetyl chloride (CF.sub.3COCl).