Process for producing bio-based product from straw hemicellulose and fully utilizing the components thereof

A process for producing a bio-based product from straw hemicellulose, comprising the steps of:

• 1) pretreating straw, wherein the straw is soaked in water, wherein a mass ratio of straw to water is from 1:1 to 1:3, a soaking temperature is from 15° C. to 90° C., and a soaking period is from 10 mins to 60 mins;
• 2) conducting steam explosion, wherein the straw soaked in step 1) is fed into a steam-explosion tank, and maintained under a steam-explosion pressure for a steam-explosion period;
• then a steam-exploded straw material is released, wherein a steam-explosion pressure is from 0.3 MPa to 2.0 MPa, and a pressure maintenance period is from 1 min to 10 mins;
• 3) performing an acid treatment, wherein the steam-exploded straw material obtained in step 2) is fed into an acid-hydrolysis tank pre-filled with a 0.8 to 1.6 wt % dilute acid and subjected to acid hydrolysis to generate a hydrolyzed material, wherein in the acid-hydrolysis tank, a mass ratio of the steam-exploded straw to the dilute acid is from 1:2 to 1:7, a reaction temperature is from 75° C. to 105° C., and a reaction time is from 10 mins to 60 mins;
• and
• 4) collecting the product thus obtained, wherein after the acid hydrolysis in step 3), the hydrolyzed material obtained in step 3) is filtered to generate a hydrolyzate liquid, and a hydrolysis residue is collected and extruded using an extruder to obtain a solid material.