NOVELTY - Lignin sorbent comprises a substrate, and a lignin binding material dispersed with respect to the substrate.    USE - The lignin sorbent, the lignin removal unit, the cellulosic biorefinery, and the process of removing and binding lignin, are useful for the production of renewable materials (all claimed) including chemicals, chemical intermediates, solvents, monomers, oligomers, polymers, biofuels, biofuel intermediates, biogasoline, biogasoline blendstocks, biodiesel, green diesel, renewable diesel, biodiesel blendstocks, and biodistillates.    ADVANTAGE - This process reduces usage enzyme costs and produces renewable materials in a cost-effective manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a lignin removal unit comprising a feed line for receiving a feed stream comprising soluble lignin or insoluble lignin, at least one lignin removal device comprising the lignin sorbent for sorbing the lignin, where the lignin removal device is in fluid communication with the feed line, a regeneration line for supplying a release material to the lignin removal device, where the regeneration line is in fluid communication with the lignin removal device, and a lignin line for removing the lignin from the lignin removal device, where the lignin line is in fluid communication with the lignin removal device;    (2) a cellulosic biorefinery comprising a pretreatment unit for depolymerization or solubilization of lignocellulosic material of a feedstock stream to a pretreated stream, a lignin removal unit before or after the pretreatment unit for removing lignin, a hydrolysis unit for depolymerization of lignocellulosic material to a renewable-based feedstock stream, a conversion unit for receiving the renewable-based feedstock stream and converting into a conversion unit effluent stream, a separation unit for receiving the conversion unit effluent stream and forming a renewable material containing stream and a byproduct stream, a regeneration line to supply release material for release of the lignin from the lignin removal unit, and a lignin line from the lignin removal unit to flow the lignin;    (3) removing lignin with the above process, comprising sorbing lignin on a lignin sorbent to separate lignin from a remainder of an input stream, and releasing the lignin from the lignin sorbent; and    (4) binding the lignin comprising adding a lignin binding material to an input stream and converting the input stream into a renewable material.