JPS5847098A - Manufacture of detergent containing alpha-sulfo-fatty acid ester salt - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a method for producing granular detergents containing α-sulfo fatty acid ester salts. The object of the present invention is to obtain a granular detergent that suppresses hydrolysis of 8-IJL and has good powder physical properties.

Relatively &! Several surfactants have been known that exhibit excellent detergency even in high-strength washing water. I don't like JJ in response to
It is attracting attention for its outstanding detergency and dirt-clamping power, as it is less likely to form initial compounds.In addition, granular detergents, which are one of the causes of eutrophication in rivers, lakes, and marshes, are Since it was discovered that phosphorus is a base, all or most of the phosphate builders in granular detergents have been replaced with carbonate salts, silicates, and aluminosilicates (zeolites). The bulk of the detergent manufacturing industry is dominated by alpha-sulfo fatty acid ester salts.

By the way, when α-sulfo fatty acid ester salt undergoes hydrolysis, it has the property of changing into α-sulfo fatty acid salt with poor surfactant ability.
The drawback is that the particulate anti-agent causes caking. For this reason, for example, Japanese Patent Application Laid-open No. 52-28507 proposes the use of alkaline bilgoux, which saves time, as a measure to prevent the hydrolysis of α-sulfo fatty acid ester salts and also to prevent caking. Kosho 53-28163
In this issue, as a measure to prevent the hydrolysis of α-sulfo fatty acid ester salts, hindered phenol compounds and human μxy?
Concomitant use with licalzenate has been proposed.

The present invention is different from the conventional Mt method exemplified above, which uses additive components to prevent hydrolysis of α-sulfo fatty acid ester salts and caking of granular detergents.
- By devising a spray drying method for granular detergents containing sulfo fatty acid ester salts, hydrolysis of a-sulfo fatty acid ester salts is suppressed during the detergent moxibustion process, and at the same time, caking of granular detergents over time is prevented. It is.

That is, the present invention provides detergents containing a-sulfo fatty acid ester salts as I! When manufacturing by Jt drying, α
A slurry (At) containing a sulfo fatty acid ester salt and substantially free of strong alkali components and a slurry (Bl) containing a strong alkali component are prepared separately, and both slurries are simultaneously placed in the same drying space. Provided is a method for producing an α-sulfo fatty acid ester salt-containing detergent, which comprises spraying and drying.

According to the method of the present invention, the α-sulfo fatty acid ester salt does not come into contact with a strong alkaline component in the presence of a large amount of water, so there is no risk of undergoing force-1 water decomposition. Also, regarding the caking prevention mechanism of the granular detergent according to the present invention,
Although the ridges are not necessarily clear in the location of the bowl, according to the method of the present invention, the * fine grains of slurry (A) and the I! JI'I# grains are slurry that is sticky due to the fact that it is dried with the latter adhered to the surface of the former and contains α-sulfo-sulfo fatikyo ester salt (the dry particles of ~ are @ids It is presumed that this is because there is nothing to do.

In this Jk, the a-sulfo fatty acid ester salt contained in the slurry (~) is represented by the following general formula.

EL　-CHCOOR.

So, M Here, R is an alkyl group having 4 to 20 carbon atoms, R1 is an alkyl group having 1 to 6 carbon atoms, and M is a cation, and the alkyl groups of R and R1 are linear or branched spiral. This polar α-sulfo fatty acid ester salt can be easily obtained by, for example, esterifying hydrogenated beef tallow fatty acid, hydrogenated palm oil fatty acid, etc., then sulfonating it, and then neutralizing this with caustic soda or caustic potash. You can get to 0 sura! j-(A) must not substantially possess strong alkaline components.0Here, "Kume alkaline component" refers to components whose pH in 1% water bath is 1000 or more, and specifically, Examples include sodium carbonate and sodium silicate. Furthermore, "substantially not containing" means that the amount of strong alkaline components contained in the slurry (Al) is 3% or less based on the weight of the dry particles.
- (A) can contain anionic surfactants (including soaps) and amphoteric surfactants other than a-sulfo fatty acid ester salts, as well as non-strong alkaline ingredients such as sodium citric acid and sodium sulfate. The concentration of 1 type of 0 slurry (A), which can be blended as needed, can be set arbitrarily as long as it does not interfere with slurry preparation, pipe transfer and spraying operations, but in general is 50~70w
The solid concentration of the present invention is 0, which is about the t-axis! J-(B
1 contains a strong alkaline component such that the pH of the water bath solution is 10.6 or higher, and typically contains sodium carbonate and/or sodium silicate. Although the strong alkaline components of the above-mentioned Kanakura and Sakura can be blended into Sura IJ-(A), it is preferable to add Kanakura, a strong alkaline component that is blended into the granular detergent, to Sura U-(B). It should be mixed. Slurry (81 contains strong alkaline components, so
Although it cannot be ruled out that a-sulfo fatty acid ester salt is added to the slurry (Bl It can be blended into the slurry (A) and the solid content of the slurry (Bl). Vinegar generally has a solid content of 50 to 75 wt%.

For F1, granular detergents usually contain chelate cutters, fluorescent brighteners, pigments, and other ingredients. 0 According to the present invention, the above slurry (At and (Bl t
f - sprayed simultaneously into the drying space and generally dried in countercurrent contact with hot air. In this case, sura IJ-(A)
Although the method of separately squirting and drying (B) and mixing the respective dry grains can suppress the hydrolysis of α-sulfo fatty acid ester salt,
Since the dried grains of A) cannot be sufficiently covered with the dry grains of slurry (Bl), it is not possible to obtain a granular detergent without caking with this method. To clarify, the methods for measuring the di-salt content and lump lids used in the Examples to evaluate the properties of granular detergents are shown below.As a precautionary note, the di-salt content is α-sulfo fatty acid ester. It is a measure of the degree to which a salt undergoes hydrolysis; the lower the degree of hydrolysis, the higher the di-salt content.

In addition, the amount of lumps is a measure for determining the caking property of granular detergents, and granular detergents with a large i1 are likely to cause caking.

(1) When a sample with a cap with a constant di-salt content is extracted with 90% ethanol, α-sulfo fatty acid ester salt is dissolved in the extract and α-sulfo fatty acid base salt is precipitated. Measure by the reverse drop foot method, and calculate the di-salt content using the following formula.

(2) Carton for lid detergent (30cInX22.5crnX6.5
Immediately after 40 days of incubation, the particles are loaded into the humidity unit and the cycle of % f-4 is filled with particles.
Gently transfer the particles onto a 4-mesh sieve by turning them over, then gently vibrate the sieve, weigh the particles remaining on the sieve, and calculate the ratio of the particles packed in the carton to the bh sieve. ↑0 Example First, three types of detergent slurries as shown below were prepared.0 Slurry powder (solid content: 62 wt%, water content: 38 wt%) Solid content composition: Sodium α-sulfo fatty acid methyl ester from hardened arm oil 3 (1wt% beef tallow soap
20wt shaft quench sodium
10vt% apricot
) (solids content of lance slurry) 68
vt%, moisture 32wt%) Solid content composition Beef tallow soap 50wt Sodium silicate (sio, n axis! 0 = 2-2) 6
wt% Sodium legate balanced slurry〇 (solid content 60 wt, moisture 40 wt axis) Solid content composition Sodium α-sulfo fatty acid methyl ester from hardened arm oil 10 wt% beef tallow soap
40wt% sodium citrate
3.3wt% sodium carbonate
26wt% sodium silicate (S tov/N
ag O=2.2) 4 vt% mirabilite
Pakunsu countercurrent jet drying equipment (hot air inlet temperature 300-350℃, hot air outlet temperature 1
00~150℃)
01) + C) was sprayed using the spraying method shown in the following table, and the di-salt content and lump 11 were measured for each of the resulting granular detergents.

In addition, the water molecules of each granular detergent were all 3 to 5 wt.

Claims (1)

[Claims] 1. In producing a detergent containing an a-sulfo fatty acid ester salt by spray drying, a slurry containing an a-sulfo fatty acid ester salt and substantially free of strong alkaline components (At and A-sulfo fatty acid ester salt containing slurry (B) containing a strong alkaline component is prepared separately, and both slurries are sprayed into a four-drying space at fi'1 and dried. Detergent manufacturing method 0 2. Slurry (Axle time I for % meter claim in which violet, a strong alkaline component contained in Al, is 3% or less (based on dry detergent weight)
The method described in Section H1.