Patent ID: 11864561
Assignee: THANH DUC LE
Field: Basic materials chemistry (Chemistry)
Classification: CPC A  C | IPC A  C

Claim 11:
12. The multipurpose fertilizer composition of claim 11, wherein the pectin extract from coffee husks and cocoa shells created by performed in a specific order from (a″) to (d″) comprising:
(a″) collecting coffee husks and cocoa shells in a ratio of 2:1; then washing, cutting, drying, and grinding to create a powder mixture having moisture content of 10%-13%;
(b″) hydrolyzing 1 part the powder mixture with 20 parts H2SO4 acid including two stages:
stage 1: soaking 1 part the powder mixture with 15 parts H2SO4 acid at 80° C. for 1.5 hours, with the combination of stirring, and maintain pH of 1.5;
stage 2: adding 5 parts of H 2 SO 4 acid for continue soaking at 50° C. for 1 hour, maintain pH of 1.5, with the combination of stirring, then filtering to create a first filtrate and a residue;

(c″) hydrolyzing 1 part the residue at step (b″) with 10 parts acetic acid including two stages:
stage 1: soaking 1 part the residue with 7 parts acetic acid at 80° C. for 45 minutes, with the combination of stirring, and maintain pH of 2;
stage 2: adding 3 parts of acetic acid for continue soaking at 40° C. for 30 minutes, with the combination of stirring, and maintain pH of 2; then filtering to obtain a second filtrate, and a coffee husks and cocoa shells mixture residue with the pectin removed; and

(d″) centrifuging a mixture of the first filtrate at step (b″) and the second filtrate at step (c″) with 3000-3500 rpm for 15 minutes to create the pectin extract from coffee husks and cocoa shells.