| http://www.w3.org/ns/prov#value | - on zone A, a stream of a reaction gas input mixture B which comprises acetic acid, steam, molecular oxygen, at least one inert diluent gas other than steam and formaldehyde and in which the molar amount nHAc of acetic acid present is greater than the molar amount nFd of formaldehyde present therein is obtained from the stream of product gas mixture A leaving reaction zone A and at least one furthe
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