Open cell foamed gypsum absorbents

Details Open cell foamed gypsum absorbents Open cell foamed gypsum absorbents

1986-09-12

1988-02-09

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

55 97, 55 98, 55387, 55DIG12, 106 86, 106 87, 106 88, 106109, 210188, 21050027, 21050038, 2105021, 521100, 604358, 604365, 604366, 604369, C08G 1814

Patent

active

047242426

ABSTRACT:
An open-cell, foamed gypsum absorbent for fluids is prepared by foaming a slurry containing plaster, carbonaceous material, and a weak acid. Some of the preferred carbonaceous material include activated carbon, dried blood, comminuted vegetable matter containing chlorophyll, hemoglobin containing heme, and organometallic chelates. Aluminum sulfate is the preferred weak acid.
Some of the gases absorbed are carbon monoxide, carbon dioxide, sulfur dioxide, ammonia, formaldehyde, nitrogen oxides, and tobacco smoke.
Some of the liquids absorbed are water, salt water, urine, blood, sperm, catemenial exudate, and perspiration.
This invention has applications in cigarette filters, gas masks, diapers, wound dressings, hospital or surgical sheeting, and undergarments for incontinent adults.

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patent: 4240839 (1980-12-01), Crepeau et al.
patent: 4265964 (1981-05-01), Burkhart

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