Method of and system for producing oil and valuable byproducts from grains in dry milling systems with a back-end dewater milling unit

• US 9,388,475 B2
• Filed: 08/20/2013
• Issued: 07/12/2016
• Est. Priority Date: 08/23/2012
• Status: Active Grant

• Current Assignee: Lee Tech LLC
• Original Assignee: Lee Tech LLC
• Inventors: Lee, Chie Ying
• Primary Examiner(s): Mayes, Melvin C
• Assistant Examiner(s): COHEN, STEFANIE J
• Application Number:
  US13/971,768
• Publication Number:
  US 20140053829A1
• Time in Patent Office: 1,057 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A23K 10/38 from distillers' or brewers' waste
• CPC Class Codes: B02C 9/04 Systems or sequences of operations; Plant
• CPC Class Codes: C11B 13/00 Recovery of fats, fatty oils or fatty acids from waste materials
• CPC Class Codes: C12P 7/02 containing a hydroxy group
• CPC Class Codes: C12P 7/20 Glycerol
• CPC Class Codes: C13K 1/02 obtained by saccharification of cellulosic materials manufacture of fodder A23K10/32
• CPC Class Codes: C13K 13/007 Separation of sugars provided for in subclass C13K C13K3/00 takes precedence
• CPC Class Codes: Y02E 50/10 Biofuels, e.g. bio-diesel
• CPC Class Codes: Y02P 60/87 Re-use of by-products of food processing for fodder production
• CPC Class Codes: Y02W 30/74 Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes

Abstract

A method of and system for producing oil and valuable byproducts from grains, such as corn, in dry mills are disclosed. The method and system include dewater milling process after fermenting. Further, the method and system are able to produce oil without evaporating. Moreover, the method and system include one or more of the germ processing units, emulsion processing units, fiber processing units, high value protein producing units, and glycerol and inorganic salt producing units, such that high value byproducts are able to be generated.

Claims

1. A method of producing oil using a dry milling system comprising:

a) separating a whole stillage into a solid portion and a liquid portion after fermenting; and

b) grinding the solid portion after the separating to release a first oil from germs and release the starch from grit in kernels of grains; and

c) separating a second oil and protein in the liquid portion.

2. The method of claim 1, wherein the grinding comprises dewater milling.

3. The method of claim 2, wherein the first oil is recovered at oil recovering after fermenting.

4. The method of claim 1, wherein the liquid portion contains the protein, the second oil and a soluble solid.

5. The method of claim 1, wherein the separating the second oil and the protein separates the liquid portion into an oily part and a protein part.

6. The method of claim 5, further comprising protein dewatering generating protein meal from the protein part.

7. The method of claim 5, further comprising fiber and protein dewatering generating DDG from the protein part.

8. The method of claim 7 further comprising recycling the overflow from the fiber/protein dewatering as part of a back-set fluid.

9. The method of claim 5, further comprising recovering the second oil from the oily part from the oil and protein separating.

10. The method of claim 9, wherein the recovering oil is performed without evaporating.

11. The method of claim 9, wherein the recovering oil is performed before evaporating.

12. The method of claim 9, further comprising generating syrup having dry solid higher than 60%.

13. The method of claim 1, wherein the grains comprises corn.

14. The method of claim 1, wherein the first or the second oil comprises corn oil.