Clean process for preparing a chloroformyl-substituted benzene by oxidation of a tail gas hydrogen chloride from a chlorination reaction and a chloroacylation reaction and recycling of the resulting oxidation product chlorine gas into the chlorination reaction. The present invention provides a clean process for preparing a polymer-grade chloroformyl-substituted benzene.

The present invention concerns a process for the obtention of a halogenated carboxylic halide having a reduced content of impurities, a fraction of the halogenated carboxylic halide having a reduced content of impurities, and its use in the manufacture of agriculturally and pharmaceutically active compounds.

The present invention concerns a process for the obtention of a halogenated carboxylic halide having a reduced content of impurities, a fraction of the halogenated carboxylic halide having a reduced content of impurities, and its use in the manufacture of agriculturally and pharmaceutically active compounds.

The present invention concerns a process for the obtention of a halogenated carboxylic halide having a reduced content of impurities, a fraction of the halogenated carboxylic halide having a reduced content of impurities, and its use in the manufacture of agriculturally and pharmaceutically active compounds.

A method of reducing impurities in a catalyst for the production of purified terephthalic acid includes forming purified terephthalic acid by hydrogenating crude terephthalic acid with a catalyst in a reactor; separating the purified terephthalic acid from the catalyst and reactivating the catalyst by washing with a caustic solution; and flushing the catalyst contaminated with impurities with a non-caustic liquid at a flushing temperature of greater than or equal to 50° C.

A method of reducing impurities in a catalyst for the production of purified terephthalic acid includes forming purified terephthalic acid by hydrogenating crude terephthalic acid with a catalyst in a reactor; separating the purified terephthalic acid from the catalyst and reactivating the catalyst by washing with a caustic solution; and flushing the catalyst contaminated with impurities with a non-caustic liquid at a flushing temperature of greater than or equal to 50° C.

A method of reducing impurities in a catalyst for the production of purified terephthalic acid includes forming purified terephthalic acid by hydrogenating crude terephthalic acid with a catalyst in a reactor; separating the purified terephthalic acid from the catalyst and reactivating the catalyst by washing with a caustic solution; and flushing the catalyst contaminated with impurities with a non-caustic liquid at a flushing temperature of greater than or equal to 50° C.

Polymerization inhibitor compositions are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor compound having a hydroxylamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

Polymerization inhibitor compositions are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor compound having a hydroxylamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to the monomer. In some instances, the monomer is an ethylenically unsaturated monomer. Such ethylenically unsaturated monomers include, but are not limited to, vinyl acetate, acrylonitrile, acrylates, methacrylates, 1,3-butadiene, styrene, isoprene, (meth)acrylic acid, and combinations thereof. Methods of preparing the polymerization inhibitors and compositions of the disclosure are also provided.

The present disclosure provides a fabric, a preparation method thereof and clothing formed therefrom. The preparation method includes the following steps: obtaining bio-based synthetic fiber chips from textile waste materials; obtaining extruded filaments from the bio-based synthetic fiber chips by adopting a spinning solution; and weaving and interlocking the extruded filaments with bio-based elastic fibers to obtain the fabric. The prepared fabric is obtained from the textile waste materials, so that waste recycling is realized, and the pollution of the textile wastes to the environment is avoided. The spinning solution is adopted in the preparation process of the fabric, so that the opacity and hydrophilicity of the fabric can be enhanced.