Preparation technology of BPEF (4, 4'-(9-fluorenylidene) bis (2-phenoxy-ethanol)) with high bulk density

Abstract

The invention discloses a preparation technology of BPEF (4, 4'-(9-fluorenylidene) bis (2-phenoxy-ethanol)) with high bulk density. Powdery BPEF is subjected to dry powder tableting by a hydraulic machine or granulation by a roller dry-technique granulator or fusing granulation to prepare a space structure of BPEF with the high bulk density, wherein powdery BPEF is subjected to dry powder tableting by the hydraulic machine and is directly compressed into cylindrical, square and half-moon-shaped space structures; the powdery BPEF is directly compressed into ingot-shaped, grain-shaped and strip-shaped space structures by the roller dry-technique granulator; and the fusing granulation comprises the steps as follows: the BPEF is heated to be in a fusing state, then the BPEF in the fusing state is uniformly distributed on a steel belt of a rotation belt type condensation granulator, is cooled in a continuous spraying manner, and finally is used for producing hemispherical, strip-shaped and sheet-shaped space structures with the forms of intermittent dipping, continuous strip discharging and full-width cloth overflowing. The technology is simple and convenient, and can effectively increase bulk density and fluidity of BPEF, so that not only is the production efficiency improved, but also the environment pollution is prevented.

Description

technical field [0001] The invention relates to a preparation process of high bulk density BPEF. Background technique [0002] The name of BPEF is 9,9-bis[(4-(2-hydroxyethoxy)phenyl]fluorene cas:117344-32-8. Due to the different crystal forms of products, BPEF has a high bulk density (greater than 0.5g / cm 3 ) and low bulk density (less than 0.5g / cm 3 ) points. Compared with products with high bulk density, BPEF with low bulk density has the following problems in the process of industrial use. [0003] 1) Due to its low bulk density, when using this "light material" BPEF, it directly leads to a decrease in production efficiency. For example: the same size reactor, if the high bulk density (assuming the high bulk density is 0.7g / cm 3 ) of BPEF can throw 700 kg, and the low bulk density (assuming the low bulk density is 0.4g / cm 3 )'s BPEF can only throw 400 kg, which directly leads to a reduction in production efficiency of about 42%. [0004] 2) Compared with BPEF with ...

AI Technical Summary

Problems solved by technology

[0003] 1) Due to its low bulk density, when using this "light material" BPEF, it directly leads to a decrease in production efficiency

For example: the same size reactor, if the high bulk density (assuming the high bulk density is 0.7g / cm 3 ) of BPEF can throw 700 kg, and the low bulk density (assuming the low bulk density is 0.4g / cm 3 ) of BPEF can only throw 400 kg, which directly leads to a reduction in production efficiency of about 42%

[0004] 2) Compared with BPEF with low bulk density and high bulk density, BPEF with low bulk density has poor fluidity

Due to its poor fluidity, when using this kind of BPEF with low bulk density, BPEF is easy to stick to the equipment or packaging, and it is easy to float in the operating environment, causing environmental pollution