Title:
Method of producing non-phosphate detergents based on powdered sodium sesquicarbonate
Kind Code:
B1


Abstract:
Abstract of EP1690923
The subject matters of the invention are: the method of producing non-phosphate detergent based on powdered sodium sesquicarbonate without additional heating during the production process.



Inventors:
Kachur, Olexendr (ul. Kuibesewa 60/24 ap. 121, 95004 Simferopol, UA)
Application Number:
EP20050460002
Publication Date:
10/24/2007
Filing Date:
02/15/2005
Assignee:
Lemeshko, Wiktoriya (Ul. Kolobrzeska 52C lok. 14, 05 510 Konstancin-Jeziorna, PL)
Kachur, Olexandr (ul. Kuibesewa 60/24 ap. 121, Simferopol 95004, UA)
International Classes:
C11D3/10; C11D3/39; C11D11/04
European Classes:
C11D3/10; C11D3/39; C11D3/39D; C11D11/04
View Patent Images:



Foreign References:
WO/2002/077141APHOSPHATE-FREE POWDER DETERGENT COMPOSITION AND METHOD FOR PRODUCTION
GB2003913A
6069124Granular detergent compositions and their production
6630439Solid detergent compositions comprising sesquicarbonate
Attorney, Agent or Firm:
Czyz, Zbigniew (BRANDPAT Patent and Trademark Attorneys Czyz Galazkiewicz Ziolkowski Professional Partnership Hoza 29/31 - Apt. 31, 00-521 Warszawa, PL)
Claims:
1. The method of production non-phosphate detergent based on powdered sodium sesquicarbonate (Na2CO3 * NaHCO3 * 2H2O) without additional heating which is produced in multistage process is characterised by that, the first stage (step I) consists of mixing dry compounds: sodium carbonate and bicarbonate used in weight proportion from 1,5-2,5 to 1-1, next to the above mixture is added 50% water solution of sodium sesquicarbonate in amount 15% (counted to the whole mixture), and the whole mixture is stirred in the rotational mixer using 40 rotations /minute until the temperature reaches 45-55°C, when steam, which was produced in the exothermic reaction, crystallises the crystals of sodium sesquicarbonate from soda crystals, next the mixture is left until it reaches the ambient temperature (step II), where the second step is consisted of two processes: first where the temperature is reduced to the ambient temperature, and the second process where the temperature is decreased at about 7-12°C below the ambient temperature, next the temperature is rising until it reaches the ambient temperature, when is observed at this step of the process up to 90% of crystals of sodium sesquicarbonate are created, the next step (step III) consists of mechanical rubbing of the mixture and the surface active-agents are added, the agents are such as: ethoxylate alcohol C13 of 7 moles ethylene oxide (2-5% by weight) ethoxylate alcohol C13 of 10 moles of ethylene oxide (1,5-3,0%) coconut diethanolamide (0,5-5,0 %) carboxymethylcellulose (0,5- 5,0%) optical whitening agent up to 0,3%, in order to activate the mixture and to provide full cristallisation of sodium sesquicarbonate, the step is performed in the machine which has the rubbing screen with sieves φ 2-2,5mm, and the powdered product is maintained in the reactor where its temperature rises 5-10°C up the ambient temperature, than when its temperature is stable, the active oxygen, in amount 10-20%, is added to the final product.

Description:

The subject matters of the invention is the method of producing non-phosphate detergent based on powdered sodium sesquicarbonate (Na2CO3 * NaHCO3 * 2H2O) without additional heating.

There are known methods from the

European patents no 138076 and

135323 of producing sodium sesquicarbonate (known as well as modified soda or neutral soda) which are performed in high temperature (50° - 300°C). The methods base on highly concentrated solutions of sodium carbonate and sodium bicarbonate.

From the

SU patent specification no 662 495 is known the method of producing of sodium sesquicarbonate while producing soda from the watered substrates. The process needs the components: carbonate and bicarbonate to be heated to +25° - 30° C.

From the

SU patent specification 152 87 31 is known the method of producing of modified soda in high temperature process. The reaction needs heating the substrates to about 225°C.

There is known from the

US 56 89 967 patent specification the use of modified soda in specific cosmetic and hygienic compounds, where the modified soda is used in concentration not more than 15% by weight.

There are not known the inventions concerning production of the agents having good physic and chemical features which are based on sodium sesquicarbonate, where the concentration of sodium sesquicarbonate is about 80% by weight.

The aim of the invention is to provide with new, safe, energy-saving method of producing non-phosphate powdered detergent based on sodium sesquicarbonate (Na2CO3 * NaHCO3* 2H2O) without additional heating and composition of detergent based on sodium sesquicarbonate.

In the patent specification, the inventors have proved the chemical character, use and safety of the detergent based on sodium sesquicarbonate.

The subject matter of the invention is the method of production non-phosphate detergent based on sodium sesquicarbonate (Na2CO3 * NaHCO3 * 2H2O) without additional heating which is produced in multistage process is characterised by that, the first stage (step I) consists of mixing dry compounds: sodium carbonate and bicarbonate used in weight proportion from 1,5-2,5 to 1-1, next to the above mixture is added 50% water solution of sodium sesquicarbonate in amount 15% (counted to the whole mixture). The whole mixture is stirred in the rotational mixer using 40 rotations /minute until the temperature reaches 45-55°C, when steam, which was produced in the exothermic reaction, crystallises the crystals of sodium sesquicarbonate from soda crystals, next the mixture is left until it reaches the ambient temperature (step II). The second step is consisted of two processes: first where the temperature is reduced to the ambient temperature, and the second process where the temperature is decreased at about 7-12°C below the ambient temperature, next the temperature is rising until it reaches the ambient temperature, when is observed at this step of the process up to 90% of crystals of sodium sesquicarbonate are created. The next step (step III) consists of mechanical rubbing of the mixture and the surface active-agents are added. The agents are such as: ethoxylate alcohol C13 of 7 moles ethylene oxide (2-5% by weight) ethoxylate alcohol C13 of 10 moles of ethylene oxide (1,5-3,0%) coconut diethanolamide (0,5-5,0 %) carboxymethylcellulose (0,5- 5,0%) optical whitening agent up to 0,3%, in order to activate the mixture and to provide full cristallisation of sodium sesquicarbonate, the step is performed in the machine which has the rubbing screen with sieves φ 2-2,5mm, and the powdered product is maintained in the reactor where its temperature rises 5-10°C up the ambient temperature, than when its temperature is stable, the active oxygen, in amount 10-20%, is added to the final product.

For the production of the detergent according to the invention is not required any additive heating. The process of manufacturing sodium sesquicarbonate is provided in ambient temperature and under normal pressure, where the heating of the substrats (while reaction is provided et the begining) uses the natural heat from the exothermic reaction.

Basic compounds for producing detergent based on powdered sodium sesquicarbonate (Na2CO3 * NaHCO3 * 2H2O) according to the invention are: sodium carbonate, sodium bicarbonate known components of detergents and water. The technological process according to the invention provides the method of growing sodium sesquicarbonate hydrates without using additional heating.

The process of crystallisation of sodium sesquicarbonate could be compared with the natural process passes in lakes. The process of production of sodium sesquicarbonate does not deliver any harmful side products.

The process according to the invention requires little amount of water and air. The whole process is easy to perform as there are natural substances used for production, the process is friendly for humans and for the environment.

The natural susbstance called "trona" which is sodium sesquicarbonate, is produced in the process according to the invention. Adding substrats in the proper stages of the process enables manufacturing the detergent.

Use of sodium sesquicarbonate in the compounds according to the invention reduces or deletes dangerous factors for human and the environment such as: phosphates, zeolites, surface -active agents, copolymers, sulphates, silicates, disinfection agents etc.

The method of production non-phosphate detergent based on powdered sodium sesquicarbonate (Na2CO3 * NaHCO3 * 2H2O) consists of many steps. The first step (step I) consists of mixing dry compounds: sodium carbonate and bicarbonate which are used in weight proportion from 1,5-2,5 to 1-1, next to the above mixture is added 50% water solution sesquicarbonate in weight proportion 15% ( counted to the whole mixture). The whole mixture is stirred in the rotational mixer which has 40 rotations /minute until the temperature reaches 45-55°C. The photo nr. 1 from the electron microscope (500 X enlarged) shows the structure which is achieved in this step. Temperature 45-55°C shows the beginning of the exothermic reaction which passes spontaneously in the process. In the second step (step II) the mixture is left until it reaches the ambient temperature. The second step is consisted of two processes: first where the temperature is reduced to the ambient temperature (which shows fig 2), and the second process where the temperature is decreased at about 7-12°C below the ambient temperature, next the temperature is rising until it reaches the ambient temperature. At this step of the process up to 90% of crystals of sodium sesquicarbonate are created (it is shown in fig 3 and 4). The next step (step III) consists of mechanical rubbing of the mixture and the surface active-agents are added, the agents are such as: ethoxylate alcohol C13 of 7 moles ethylene oxide (2-5% by weight) ethoxylate alcohol C13 of 10 moles of ethylene oxide (1,5-3,0%) coconut diethanolamide (0,5-5,0 %) carboxymethylcellulose (0,5-5,0%) optical whitening agent up to 0,3%. In order to activate the mixture and to provide full cristallisation of sodium sesquicarbonate. The step is performed in the machine which has the rubbing screen with sieves φ 2-2,5mm. The powdered product is maintained in the reactor where its temperature rises 5-10°C up the ambient temperature. The powder is a final product when its temperature is stable. The active oxygen, in amount 10-20%, is added to the final product. The final powdered detergent does not bring any allergy and irritation to the skin.

Table
The comparison of physical and chemical properties of the detergent according to the invention to the valid standards (PN 94/C 77060) and criteria according to EKO ZNAK (Certificate No E/13/01/03/BS/D)
NoPhysical and chemical FeaturesValid standardPhysical and chemical characteristic of the detergent of the invention
1Incrustation of fabric in PN /C-04836<2,52,4
2Protection against
futher
dirt in % BN 74/6140-06
>85
>90
85
92
3The content of active agents in % PN 90/C 04841>9,59,6
4The content of active oxygen in % PN 92/C 04816>1,31,4
5pH of the water solution<11,09,2
6Destruction of the fabric in % PN 83/C 04826<257,0
7dermatological test ITA TEST Nr. 5480/02----The allergic reactions and skin iritation were not observed
8The estimation according to EKO-ZNAK Nr KT 1/2000 in points>4254,2

The characteristic feature of the detergent according to the invention is the content of sodium sesquicarbonate in amount from 50 to 94% by weight.

The above chart shows, that physical and chemical features and use of the detergent according to the invention, exceeded the valid standards and the detergent is friendly for people and the environment.