摘要:
Process for the preparation of a vinylidene chloride polymer composite comprising a solid particulate encapsulated in the vinylidene chloride polymer. The process comprises providing a dispersion of a solid particulate material in a liquid phase, said dispersion comprising a RAFT/MADIX agent; providing vinylidene chloride and optionally one or more ethylenically unsaturated monomer copolymerisable therewith to said dispersion; and polymerising vinylidene chloride and said optionally present one or more ethylenically unsaturated monomer under the control of said RAFT/MADIX agent to form polymer at the surface of said solid particulate material.
摘要:
Process for the preparation of a vinylidene chloride polymer comprising polymerizing vinylidene chloride and optionally at least one ethylenically unsaturated monomer copolymerizable therewith under the control of a RAFT agent of formula (II).
摘要:
Process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium using an equipment having at least one surface in contact with the liquid reaction medium, wherein said surface consists of a material selected from glass, polytetrafluoroethylene and nickel based metal alloy.
摘要:
Process for reducing the Total Organic Carbon of a first aqueous composition (A) comprising submitting (A) to a treatment with active chlorine at a first pH value in order to obtain a second aqueous composition (B), submitting at least one part of (B) to a venting treatment at a second pH value lower than the first pH value in order to obtain a third aqueous composition (C) and submitting at least one part of (C) to a treatment with active chlorine at a third pH value lower than the second pH value in order to obtain a fourth aqueous composition (D) with a Total Organic Carbon lower than the Total Organic Carbon of (A).
摘要:
Process for the manufacture of vinyl chloride monomer (VCM), comprising step 1): subjecting 1,2-dichloroethane (EDC) to pyrolysis in order to generate a gas mixture comprising VCM, hydrochloric acid (HCl), and EDC; step 2): quenching and/or cooling and/or condensing such gas mixture to a liquid+gas mixture; step 3): subjecting such liquid+gas mixture to a first separation step to remove substantially all the HCl from the liquid+gas mixture so as to leave a stream consisting substantially of VCM and EDC; and step 4): subjecting such VCM+EDC stream to a second separation step so as to get a stream of substantially pure VCM and a stream of unconverted EDC, wherein a heat exchanger is used to heat up the VCM+EDC stream prior to being fed to a distillation column in step 4), such heat exchanger being powered by a stream of hot fluid available in any one of steps 2) to 4) of the process.
摘要:
Disclosed are certain fluorinated derivatives of Meldrum's acid as novel compounds, preparation methods for the same, their use in Li ion batteries, Li air batteries and Li sulphur batteries as well as solvent compositions, electrolyte compositions and respective batteries containing them.
摘要:
A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising sodium carbonate and an alkaline metal salt impurity at a concentration Ci(A), comprising: a) mixing the stream (A) with part of a stream (B), b) bicarbonating the resulting mixed stream with a gas comprising CO2 to produce an aqueous suspension comprising sodium bicarbonate crystals (F), c) separating the sodium bicarbonate crystals (F) from the aqueous liquor (G), d) partly debicarbonating at least part of (G) and removing part of the water of (G) to obtain the stream (B) with the salt impurity at a concentration Cf(B), e) recycling part of the stream (B) to step a) so that the ratio of the concentrations Cf(B)/Ci(A) of the impurity is at least: 1.4, and f) removing the remainder (I) of the stream (B) or the remainder (J) of the liquor (G) to be further processed.
摘要:
A catalyst comprising: a platinum group metal, silver or gold, and a carrier containing niobium or tantalum oxide or niobium or tantalum phosphate, and an oxide other than niobium or tantalum oxide, as well as its use in production of hydrogen peroxide. A process for producing hydrogen peroxide, comprising reacting hydrogen and oxygen in the presence of such catalyst in a reactor, and a process for producing such catalyst.
摘要:
Novel spirobifluorene compounds for light emitting devices where the spirobifluorene ring system comprises at least one ligand in meta-position which is bound to the spirobifluorene through a heteroatom not being part of a ring system.
摘要:
A mixture of compounds containing 1,3-dichloropropan-2-ol, 2,3-dichloropropan-1-ol, and a halogenated ketone, where the halogenated ketone content of the mixture is at least 0.0001% by weight and less than or equal to 0.1% by weight relative to the 1,3-dichloropropan-2-ol and 2,3-dichloropropan-1-ol.