The invention provides a process for preparing l-pectinose and
xylose byproduct with pea pods as a
raw material. The process for preparing the l-pectinose and
xylose byproduct with the pea pods as the
raw material comprises the steps of carrying out pretreatment on the
raw material, carrying out low
acid hydrolysis for extracting l-pectinose and carrying out high
acid hydrolysis for extracting
xylose, The process for preparing the l-pectinose and xylose byproduct with the pea pods as the raw material has the advantages that low acid is utilized for hydrolyzing the pea pod raw material, high content l-pectinose
hydrolysate can be obtained by adopting a one-step decoloration-ultrafitration-
desalination-concentration process, and
crystallization is directly carried out for obtaining the l-pectinose without carrying out
chromatographic separation, so that the production technology is simplified, the operation is simple, and the production cost is reduced;
hydrolysis slag with l-pectinose removed is added with acid again to be hydrolyzed, and xylose is produced at the same time, so that the pea pod raw material is fully utilized; in treatment on
hydrolysate, a
saccharic acid membrane
separation process is adopted for replacing the traditional acid
neutralization process, so that part of acid liquor is recycled,
sewage discharge is greatly reduced, intake of
saline ions is avoided, a follow-up
processing load is lightened, and the production cost is reduced.