GB577879A - Improvements in the bleaching of oils and fats - Google Patents

Improvements in the bleaching of oils and fats

Info

Publication number
GB577879A
GB577879A GB20317/44A GB2031744A GB577879A GB 577879 A GB577879 A GB 577879A GB 20317/44 A GB20317/44 A GB 20317/44A GB 2031744 A GB2031744 A GB 2031744A GB 577879 A GB577879 A GB 577879A
Authority
GB
United Kingdom
Prior art keywords
compound
bleaching
per cent
per
phosphoric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20317/44A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Lever Brothers and Unilever Ltd
Original Assignee
Unilever PLC
Lever Brothers and Unilever Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever PLC, Lever Brothers and Unilever Ltd filed Critical Unilever PLC
Publication of GB577879A publication Critical patent/GB577879A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00—Refining fats or fatty oils
    • C11B3/02—Refining fats or fatty oils by chemical reaction
    • C11B3/08—Refining fats or fatty oils by chemical reaction with oxidising agents
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B3/00—Refining fats or fatty oils
    • C11B3/001—Refining fats or fatty oils by a combination of two or more of the means hereafter

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fats And Perfumes (AREA)

Abstract

577,879. Bleaching oils and fats. LEVER BROS. & UNILEVER, Ltd. Oct. 20, 1944, No. 20317. Convention date, Oct. 27, 1943. [Class 91] Dark oils and fats are bleached first with an acidic phosphoric compound and an oxidiz:ng per compound and then with a bleaching earth. Preferably the stock is agitated at 'a slightly elevated temperature with both a small quantity of commercial phosphoric acid and a small quantity of hydrogen peroxide solution, until no further bleaching is manifest, and then washed with hot water to remove the phosphoric acid and any colouring matter that has coagulated. The stock may then be dried and bleached with 2 to 6 per cent. of a bleaching earth in the conventional manner. The acidic phosphoric compound may be commercial orthophosphoric acid in concentrations of from 70 to 85 per cent. Other such compounds used may be pyrophosphoric acid and acid salts of phosphoric acids such as potassium or sodium dihydrogen phosphate or disodium dihydrogen pyrophosphate. The oxidizing per-compound may be hydrogen peroxide, or an alkali metal peroxide, perborates or persulphates. Commercial hydrogen peroxide in 30 per cent. solution is used in examples. The proportions of the phosphoric compound and the per-compound may be within the range of .25 to 2 per cent. by weight of oil or fat, .5 to 1 per cent. of each being the optimum range. The bleaching is carried out at a temperature of 60- 70‹C. when the stock is in the liquid state but below the temperature at which charring commences, i.e., 80-90‹ C. The treating time is from one half to one and a half hours. The process may be operated as a batch or a continuous one. Specification 577,880 is referred to.
GB20317/44A 1943-10-27 1944-10-20 Improvements in the bleaching of oils and fats Expired GB577879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577879XA 1943-10-27 1943-10-27

Publications (1)

Publication Number Publication Date
GB577879A true GB577879A (en) 1946-06-04

Family

ID=22012766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20317/44A Expired GB577879A (en) 1943-10-27 1944-10-20 Improvements in the bleaching of oils and fats

Country Status (1)

Country Link
GB (1) GB577879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569136A (en) * 1950-04-28 1951-09-25 Pittsburgh Plate Glass Co Method of improving color and drying characteristics and similar properties of drying glyceride oils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569136A (en) * 1950-04-28 1951-09-25 Pittsburgh Plate Glass Co Method of improving color and drying characteristics and similar properties of drying glyceride oils

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