초록 ▼

A porous granular ceramic material has a granule size of from 1 to 5 mm, a bulk density of from 200 to 700 g/l, preferably 350 to 550 g/l, a porosity of from 50 to 80% v/v, preferably from 65 to 80% v/v, and a liquid absorbency of from 20 to 200%, preferably from 40 to 150%, of water based on the we

A porous granular ceramic material has a granule size of from 1 to 5 mm, a bulk density of from 200 to 700 g/l, preferably 350 to 550 g/l, a porosity of from 50 to 80% v/v, preferably from 65 to 80% v/v, and a liquid absorbency of from 20 to 200%, preferably from 40 to 150%, of water based on the weight of the granular material. The material may be made by calcining a mixture of a clay and a particulate combustible material. The material is suitable for use as animal litter or as an industrial absorbent for liquids.

대표청구항 ▼

A method for the preparation of porous granular ceramic material having a granule size predominantly within the range of from 1 to 5 mm, a bulk density within the range of from 200 to 700 g/l, a porosity within the range of from 55 to 80% v/v, and a liquid absorbency within the range of from 20 to 2

A method for the preparation of porous granular ceramic material having a granule size predominantly within the range of from 1 to 5 mm, a bulk density within the range of from 200 to 700 g/l, a porosity within the range of from 55 to 80% v/v, and a liquid absorbency within the range of from 20 to 200% of water based on the weight of granular material, the pores in said porous material being constituted by voids derived from the combustion of lignite previously contained therein, said method comprising calcining granules comprising a mixture of particulate clay and particulate lignite in a weight ratio of 1:2 to 2:1, the temperature and time of calcination being such that a substantial amount of the clay remains unvitrified and the lignite is substantially completely burnt off and the weight loss of the mixture is between 40 and 65% based on the weight of the dried mixture.