초록

A process for pneumatic delivery of water-absorbing polymer particles, the initial gas rate in the delivery being from 1 to 6 m/s and the delivery material loading being from 1 to 100 kg/kg.

대표청구항 ▼

1. A process for pneumatic dense stream delivery of water-absorbing polymer particles comprising: supplying a delivery material comprising water-absorbing polymer particles to a delivery line; andsupplying gas to the delivery line at an initial gas rate in the delivery line is from 1 to 6 m/s so tha

1. A process for pneumatic dense stream delivery of water-absorbing polymer particles comprising: supplying a delivery material comprising water-absorbing polymer particles to a delivery line; andsupplying gas to the delivery line at an initial gas rate in the delivery line is from 1 to 6 m/s so that a delivery material loading in the delivery line is from 5 to 75 kg/kg, the delivery material loading being the quotient of delivery material mass flow rate and gas mass flow rate, to deliver the water-absorbing polymer particles in a dense stream. 2. The process according to claim 1, wherein the pneumatic delivery is via a tube having a tube diameter is from 3 to 30 cm. 3. The process according to claim 1, wherein the tube diameter increases in delivery direction. 4. The process according to claim 1, wherein a pressure in the delivery line with respect to atmospheric pressure is from 0.8 bar to 10 bar. 5. The process according to claim 1, wherein the polymer particles have a water content of less than 10% by weight. 6. The process according to claim 1, wherein at least 90% of the polymer particles have a particle diameter of less than 1000 μm. 7. The process according to claim 1, wherein the polymer particles are based on polyacrylic acid. 8. The process according to claim 1, wherein the polymer particles are based on crosslinked polyacrylic acid. 9. The process according to claim 1, wherein the polymer particles are based on partly neutralized polyacrylic acid. 10. The process according to claim 1, wherein the initial gas rate in the delivery line is from 1.5 to 6 m/s. 11. The process according to claim 10, wherein the initial gas rate in the delivery line is from 2 to 5 m/s. 12. The process according to claim 11, wherein the initial gas rate in the delivery line is from 3 to 4 m/s. 13. The process according to claim 1, wherein the delivery line comprises a fluid advanced line, and the initial gas rate in the delivery line is from 2 to 6 m/s. 14. The process according to claim 13, wherein the initial gas rate in the delivery line is from 3 to 5.5 m/s. 15. The process according to claim 14, wherein the initial gas rate in the delivery line is from 4 to 5 m/s. 16. The process according to claim 1, wherein the delivery material loading in the delivery line is from 10 to 50 kg/kg.