Non-Bleaching Solid Seasoning Composition, Griffith & Hall, Patent No. 1,994,571
The patent by Carroll L. Griffith and Lloyd A. Hall (a pioneer in food chemistry from Chicago) describes a Non-Bleaching Solid Seasoning Composition (Patent No. 1,994,571), granted on March 19, 1935. This invention is a chemically stabilized spice base that utilizes organic amines to prevent the characteristic red-orange color of capsicum (peppers) from fading when mixed with table salt, ensuring the aesthetic quality of commercial meat products.
The “Why”
Commercial meat processors in the 1930s faced a significant marketing crisis: their spice blends turned white or mottled gray within weeks. Hall discovered that when oleo-resin of capsicum met sodium chloride, a slow chemical reaction (likely involving the release of trace chlorine or air oxidation catalyzed by chloride ions) destroyed the pepper’s pigments. This was exacerbated by the formation of natural acids over time. Hall sought an organic neutralizing agent that could “fix” the color and stabilize volatile flavor oils without affecting the taste of the meat.
Inventor Section: Lloyd A. Hall
Lloyd A. Hall’s engineering philosophy was defined by chemical synergy. As a Black chemist reaching the apex of his field during an era of systemic exclusion, Hall’s brilliance lay in his ability to bridge the gap between pure organic chemistry and industrial food production. He recognized that food components were reactive chemicals that required active stabilization. This patent highlights his use of ethanolamines, a sophisticated choice for the era, proving his mastery of complex molecular interactions to ensure food remained visually appealing and shelf-stable.
Key Systems Section
1. The Amine Neutralization System
- Function: Chemically binds to free acids to halt the bleaching reaction.
- Modern Translation: Organic Base Buffering.
- Hall introduced ethanolamines (mono, di, and triethanolamine) which act as a derivative of ammonia. These organic bases “capture” the acids formed by oxidation, forming stable salts and preventing the acid-chloride synergy that destroys the red pigment.
2. The Micro-Crystalline Carrier
- Function: Provides a high-surface-area vehicle for liquid extracts.
- Modern Translation: Spray-Dried / Flash-Evaporated Carrier.
- The salt is processed into a fine powder by spraying brine onto hot drums ($285^\circ\text{F}$ to $300^\circ\text{F}$). This creates “cubic crystal lattices” with vast capillary spaces that “house” liquid seasonings, preventing them from settling or leaching.
3. The Fixing and Dispersing Agent
- Function: Maintains a homogeneous mixture and prevents evaporation.
- Modern Translation: Hygroscopic Fixative.
- By milling the amine directly into essential oils (clove, cassia, nutmeg) and adding glycerin, Hall created a stable emulsion that “fixes” volatile aromas to the salt crystals, ensuring the flavor profile remains consistent over months.
4. The Complex Volatile Interface
- Function: Manages the interaction between reactive aldehydes and phenols.
- Modern Translation: Reactive Intermediate Suppression.
- Amines have the power to unite with phenols and aldehydes found in spice oils (like eugenol in cloves). Hall utilized this property to potentially act as a secondary fixing agent for the aromatic principles of the spices.
Comparison Table
| Feature | Unstable “Ground” Seasoning | Hall’s Amine-Stabilized Composition |
| Color Retention | Mottled gray/white in 3 weeks. | Uniform red-orange for months. |
| Active Neutralizer | None (Acids react with chloride). | Triethanolamine (Neutralizes acids). |
| Crystal Form | Irregular, ground salt grains. | Flash-evaporated micro-crystals. |
| Aroma Stability | Rapid loss of volatile oils. | Glycerin & Amine fixation of oils. |
Significance Section
- Introduction of Organic Bases: This patent pioneered the use of specific organic amines in food tech to manage shelf-life, a precursor to modern food-grade emulsifiers and stabilizers.
- Advanced Surface Engineering: Hall’s “flash evaporation” method allowed for higher concentrations of liquid flavorings in dry mixes than ever before.
- Standardization of the Meat Industry: By solving the bleaching problem, Hall enabled large-scale production of bologna, frankfurters, and meat-loaves with a “standard” look.
- Scientific Empathy: Hall addressed the “fear of loss of strength” in users, showing an understanding of both the chemistry and the psychology of the food industry.
