Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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B01D
SEPARATION
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B01D11/04
of solutions which are liquid
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B01D11/0426
Counter-current multistage extraction towers in a vertical or sloping position
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B01D11/043
with stationary contacting elements, sieve plates or loose contacting elements
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