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Publication numberUS2016289 A
Publication typeGrant
Publication dateOct 8, 1935
Filing dateFeb 17, 1928
Priority dateFeb 17, 1928
Publication numberUS 2016289 A, US 2016289A, US-A-2016289, US2016289 A, US2016289A
InventorsTipton Mcgill Homer
Original AssigneeAlryc U Mcgill
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cleaning and scouring material
US 2016289 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)


No Drawing.

Stuttgart, Ark., assignor McGill, Stuttgart, Ark.

Serial No. 255,195. Renewed January 30, 1935 3 Claims.

The high silica content of rice hulls is known and it has been proposed to make use of such silica as a detergent agent. Usually this has been done by prior incineration of the hulls to 5 make the silica available as such. It has also been proposed to use ground husks of rice for the polishing of metals and to employ bran mixed with sand, saw-dust, mineral oil and other materials as abrasives, detergents and sweeping compounds.

Rice hulls which have been detachtd from the grain consist of an average of 42% of fibrous substance which itself contains a natural lubricant of about 1% fatty substance and approximately 19% of almost pure silica in the form of minute sharp crystals, intermixed with and interwoven with the fibrous matter in the natural state of the material. They may be likened to miniature sheets of abrasive paper, such as sand paper or crocus cloth.

That rice hulls have abrasive and polishing properties is known as explained above. But they have not become successfully practicable and popular for the reason that they so quickly and so completely disintegrate. This is due to the fact that the fibrous constituent is dry, brittle and easily breaks into minute particles, thus becoming ineffective.

I have discovered that this serious physical defect may be overcome by treating the fibrous or cellulose constituents of the rice hulls so that they are toughened, will therefore disintegrate less readily and are more suitable for the purposes set forth. By toughening, I mean causing them to have the property of flexibility without brittleness; the capability of yielding to a bending force without breaking.

To secure this desirable result, I impregnate tht fibrous constituents of the hulls with a tough- 40 ening agent. Hydrocarbon oil, glycerine or other fatty substances that will permeate the cellulose and have the toughening properties are employed. Impregnation is best accomplished by spraying the oil on to hulls while in motion through a suitable conveyor. I have found that when so applied from two to three percent by weight of oil will accomplish what will require ten to fifteen percent by merely intermixing the oil with the hulls. A relatively small amount sprayed will produce the desirable the cellulose matter. The hulls in dry condition are preferably so treated because their power of absorption is great. Furthermore I have found that an excess of oil serves no useful purpose.

The treatment may be applied to the hulls in 10 the form. they have when detached from the grain. Preferably however, the hulls are first ground to a predetermined mesh, say one millimeter, thereby not only making them uniform in size, but giving them a more nearly flat, flaky form, so that the surfaces are made better available than the rounded contour of the natural hull section.

The treated material may, if desired, be dyed or otherwise colored to give it a distinctive or 20 more attractive appearance and packages in any desired manner.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any 30 of the advantages of the invention.

What I claim, is:--

l. A cleaning and scouring composition comprising rice hulls and a toughening agent of the group consisting of hydrocarbon oil and glycerine 35 impregnating the cellulose constituents of said rice hulls.

2. A cleaning and scouring composition com prising rice hulls and a hydrocarbon oil impreghating the cellulose constituents of said rice 4O hulls.

3. A cleaning and scouring composition comprising rice hulls and glycerine impregnating the cellulose constituents of said rice hulls.


pliability or toughness of 5

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2423449 *Apr 17, 1941Jul 8, 1947Colgate Palmolive Peet CoPreparation of spray dried soap particles having only slight dustforming tendencies
US2423450 *Sep 28, 1943Jul 8, 1947Colgate Palmolive Peet CoPreparation of synthetic organic detergent particles having only slight dust-forming tendencies
US4407789 *Nov 16, 1981Oct 4, 1983Colgate-Palmolive CompanyGround rice hulls in body powders
DE3229496A1 *Aug 7, 1982May 26, 1983Colgate Palmolive CoHochsaugfaehiger koerperpuder mit gemahlenen reishuelsen
EP0410054A1 *Jul 27, 1989Jan 30, 1991Ching-Teng ChenA cleansing composition and a process for preparing the same
EP1160310A1 *May 24, 2001Dec 5, 2001Satoh TeizoDetergent composition
U.S. Classification510/395, 510/461, 510/505, 510/462
International ClassificationC11D7/44, C11D7/22
Cooperative ClassificationC11D7/44
European ClassificationC11D7/44