Bauxite grinding compositions that can significantly reduce the viscosity of bauxite slurry, which allow alumina refinery plants to increase throughput of bauxite grinding or pre-desilication. Described are processes to improve the grinding of a bauxite containing slurry in a Bayer process comprising: adding an effective amount of a bauxite grinding composition to the bauxite containing slurry before or during the grinding step or pre-desilication step, wherein the bauxite grinding composition comprises dextran, maltitol or a co-polymer.

Bauxite grinding compositions that can significantly reduce the viscosity of bauxite slurry, which allow alumina refinery plants to increase throughput of bauxite grinding or pre-desilication. Described are processes to improve the grinding of a bauxite containing slurry in a Bayer process comprising: adding an effective amount of a bauxite grinding composition to the bauxite containing slurry before or during the grinding step or pre-desilication step, wherein the bauxite grinding composition comprises dextran, maltitol or a co-polymer.

Apparatus, systems (including solvent or enzyme), and methods of degrading plastic are described. Plastic waste is stretched in the presence of solvent. The surface may be further treated to increase hydrophilicity. The resulting plastics can be treated with plastic-degrading enzyme either with microorganisms or direct application of enzyme.

Apparatus, systems (including solvent or enzyme), and methods of degrading plastic are described. Plastic waste is stretched in the presence of solvent. The surface may be further treated to increase hydrophilicity. The resulting plastics can be treated with plastic-degrading enzyme either with microorganisms or direct application of enzyme.

The present disclosure relates to a method for improving the auto-dispersant characteristic in water of a mineral substance. The method includes the steps of dry-grinding, in the presence of a formulation, a mineral substance selected from a dolomite, talc, titanium dioxide, alumina, kaolin and calcium carbonate, wherein the formulation contains a polyglycerol and no glycerol.

The present disclosure relates to a method for improving the auto-dispersant characteristic in water of a mineral substance. The method includes the steps of dry-grinding, in the presence of a formulation, a mineral substance selected from a dolomite, talc, titanium dioxide, alumina, kaolin and calcium carbonate, wherein the formulation contains a polyglycerol and no glycerol.

A method for producing electrolytic manganese dioxide with high compact density where electrolytic manganese dioxide pieces are milled in a classifying mill to produce first milled manganese dioxide particles where 30% of the particles are larger than 200 mesh and up to 95% of the particles are smaller than 325 mesh. The first milled manganese dioxide particles are milled a second time to produce manganese dioxide particles having a second particle size distribution. Also, an electrolytic manganese dioxide particle composition, wherein when the particle size distribution of the composition is plotted as a function of base-10 logarithm of the particle size, a first peak is centered at a particle size from 40-100 m and contributes a minimum of 20% of the area under the curve of the overall particle size distribution and a maximum of 45% of the area under the curve of the overall particle size distribution.

A method for producing electrolytic manganese dioxide with high compact density where electrolytic manganese dioxide pieces are milled in a classifying mill to produce first milled manganese dioxide particles where 30% of the particles are larger than 200 mesh and up to 95% of the particles are smaller than 325 mesh. The first milled manganese dioxide particles are milled a second time to produce manganese dioxide particles having a second particle size distribution. Also, an electrolytic manganese dioxide particle composition, wherein when the particle size distribution of the composition is plotted as a function of base-10 logarithm of the particle size, a first peak is centered at a particle size from 40-100 m and contributes a minimum of 20% of the area under the curve of the overall particle size distribution and a maximum of 45% of the area under the curve of the overall particle size distribution.

The invention relates to a method for grinding a carbonaceous solid, wherein a grinding additive is added before or during grinding, and the grinding additive, based on the dry mass, comprises 6% to 80% by weight of caprolactam and 1.5% to 30% by weight of aminocaproic acid, where, based in each case on the dry mass, 0.002% to 2% by weight of the grinding additive is used, based on the total amount of carbonaceous solid. Further claimed are a grinding additive and the use of a grinding additive for reducing the energy employed for a given grinding outcome and also for reducing the agglomeration tendency of the resultant product.

The invention relates to a method for grinding a carbonaceous solid, wherein a grinding additive is added before or during grinding, and the grinding additive, based on the dry mass, comprises 6% to 80% by weight of caprolactam and 1.5% to 30% by weight of aminocaproic acid, where, based in each case on the dry mass, 0.002% to 2% by weight of the grinding additive is used, based on the total amount of carbonaceous solid. Further claimed are a grinding additive and the use of a grinding additive for reducing the energy employed for a given grinding outcome and also for reducing the agglomeration tendency of the resultant product.