The invention discloses a method and a device for producing 2-naphthol and coproducing 2,3 acid by
solvent method continuous
carbonization. The method is a new process for producing 2,3 acid by continuous
carbonization, changes the traditional production process and method, and develops a
new production technology for producing important intermediates and derivatives of
naphthalene series dyes and pigments. The device comprises a 2-naphthol production
system and a 2-hydroxy-3-
naphthoic acid production
system, wherein the 2-naphthol production
system comprises a mother solution extracting tank, a mixer, a de-A rectifying
tower, a
carbonization reaction kettle, a crude 2-naphthol
distillation tower, a 2-naphthol product rectifying
tower and a
slicing-packing device; the 2-hydroxy-3-
naphthoic acid production system comprises a static
separation system, a
neutralization and filter pressing device, an acidification system and a centrifuging-washing and
drying-packing device; the mother solution extracting tank is sequentially connected with the mixer, the de-A rectifying tower, the carbonization reaction kettle, the crude 2-naphthol
distillation tower, the 2-naphthol product rectifying tower and the
slicing-packing device; and the bottom material (2,3-acid disodium salt) of the crude 2-naphthol
distillation tower is sequentially connected with the static
separation system, the
neutralization and filter pressing device, the acidification system, a
centrifuge and
drying-packing device.