초록 ▼

The invention relates to a method for producing a packing structure, characterized in that it includes the following main steps: a) a step comprising the hydrothermal synthesis of the packing mass, performed using a mixture of quicklime and silica; and b) a step comprising the drying of the packing

The invention relates to a method for producing a packing structure, characterized in that it includes the following main steps: a) a step comprising the hydrothermal synthesis of the packing mass, performed using a mixture of quicklime and silica; and b) a step comprising the drying of the packing mass produced in step (a) at a temperature T2 of between 110° C. and 500° C., possibly with at least one intermediate stage performed at a temperature of between 111° C. and 350° C. over a period t2 selected such that the physisorbed water content of the packing mass is less than 0.5%.

대표청구항 ▼

1. A process for producing a container packing structure comprising a crystalline phase containing 55 to 97% by weight of xonotlite crystallites and 3 to 45% by weight of tobermorite crystallites, less than 15% by weight of intermediates of formula: CaxSiyOz,wH20 with 1x16, 1y24, 4z60 and 1w18, and

1. A process for producing a container packing structure comprising a crystalline phase containing 55 to 97% by weight of xonotlite crystallites and 3 to 45% by weight of tobermorite crystallites, less than 15% by weight of intermediates of formula: CaxSiyOz,wH20 with 1x16, 1y24, 4z60 and 1w18, and having less than 5% by weight of CaCO3 and less than 5% by weight of SiO2, said packing structure being homogeneous, characterized in that it comprises the following main steps: a) a hydrothermal synthesis step for synthesizing the packing mass, carried out by mixing quicklime with silica; andb) a drying step, for drying the packing mass resulting from step a) with at least one intermediate temperature hold T2′ carried out at a temperature between 111° C. and 500° C. prior to a drying hold at a temperature T2 between 110° C. and 500° C. for a time t2 chosen such that the content of physisorbed water of the packing mass is less than 0.5%, to produce the container packing structure comprising a crystalline phase containing 55 to 97% by weight of xonotlite crystallites and 3 to 45% by weight of tobermorite crystallites, less than 15% by weight of intermediates of formula: CaxSiyOz,wH20 with 1x16, 1y24, 4z60 and 1w18, and having less than 5% by weight of CaCO3 and less than 5% by weight of SiO2, said packing structure being homogeneous. 2. The process of claim 1, wherein the time t2 is chosen such that the content of physisorbed water of the packing mass resulting from step a) is less than 0.3%. 3. The process of claim 1, wherein the time t2 is chosen such that the content of physisorbed and chemisorbed water of the packing mass is less than 0.5%. 4. The process of claim 1, wherein the hydrothermal synthesis step a) comprises: (i) a temperature rise substep during which an initial quicklime/silica mixture is heated, over a time of less than 10 h, to a temperature T1 of between 150 and 300° C.;(ii) a packing mass producing substep carried out: using the quicklime/silica mixture resulting from step (i),at a temperature T1 of between 150 and 300° C.,at a pressure P1 of between 5×105 Pa and 25×105 Pa andfor a time of between 10 h and 70 h; and(iii) a cooling substep, during which the packing mass resulting from step (ii) is cooled, over a time of between 1 and 48 h, from the temperature T1 to room temperature. 5. The process of claim 1, wherein the quicklime is obtained by the calcination, at a temperature of at least 850° C. for at least one hour, of limestone blocks such that at least 90% by weight have a size of 1 to 15 mm, said limestone having a purity of at least 92% by weight and an open porosity ranging from 0 to 25%. 6. The process of claim 1, wherein the drying step is carried out at a temperature of 300 to 450° C. for the main temperature hold. 7. The process of claim 1, wherein, in step b), the rate of rise ΔTM2 to the temperature T2 is less than 25° C./h and the rate of fall ΔTR2 to room temperature from T2 is greater than 25° C./h.