Method for the isomerizing dehydration of a non-linear primary alcohol feedstock in the presence of water injection and a catalyst comprising a FER or MFS zeolite

A process for the isomerizing dehydration of a feedstock comprising a primary monoalcohol, alone or as a mixture, of formula R—CH2—OH, wherein R is a nonlinear alkyl radical of formula CnH2+1 where n is 4, said process comprising

• providing the feedstock into a reactor in vaporized form, and
• performing isomerizing dehydration of said vaporized feedstock
• in a gas phase at a weighted average temperature of 275° C. to 400° C., at a pressure of 0.5 MPa to 0.9 MPa and at a WWH of 5 to 10 h−1, and
• in the presence of a catalyst comprising at least one silicic binder that consists of amorphous silica, and at least one zeolite having at least one series of channels, the opening of which is defined by a ring of 8 oxygen atoms, which zeolite is ferrierite, wherein the content of zeolite in the catalyst is 50% to 90% by weight, and
• wherein the vaporized feedstock entering the reactor has a weight content of water of 6% to 35%.