LU86692A1 - STABILIZED CADMIUM OXIDE AND PROCESS FOR ITS PREPARATION - Google Patents

Description

1V \ ,, v,. * - BL-3977

Patent application \ * \ de. ^ - 12-1986 ..................

Designation of the Inventor (1) The undersigned ......... Im.Bst.Meyers, ......................... .................................................. .............................................

.................. Iag -.- Cons .-- in-owner-. · Ind ”-r - 4.6 — ruâ • du - Ciine.ti & re.7 --Luxeinbour-g- acting as depositor - agent of the depositor - SA FLORIDIENiflE-CHIMIE NV

Quai des .. „Factories__Î2 ............................................ .................................................. .................................................. .............................

(3) of the invention concerning: .................. Qxvde ... de ... cadmim ... stab.ili.sé ..., .. e ± ... pro.gédé..p.QuE .... sa..pré.Rar..a.ti.on ..

designates as inventor (s): 1. Name and first names .... VAHDEI'iBEHGHE ... iiarcel ........................... .................................................. .......................

Address Chaussée de Mons, 414 B, B - 7810 MAFPLE.

2. Surname and first names ............................................. .................................................. .................................................. ......................

Address ................................................. .................................................. .................................................. .............-.........................

3. Surname and first names ............................................. .._............................................... .................................................. ......................

Address ................................................. .................................................. .................................................. ........................................

He affirms the sincerity of the above indications and declares to assume full responsibility for them.

................ Luxembourg * ....................- * e on - 16- déeeiabre .... .....-.......... 19-86-- (signature) A 680 26 _'_ (1) Last name, first names, company, address.- - | ^ · ΓΓ · -.,. ,. . l Γ2P.U ...... Jï ------ -V— · Γ _, __, TU - Λ, BL-39 77

1. t ö C ß Q y GRAND DUCHY OF LUXEMBOURG

I Patent N .............................................. Sir Minister i of December 19 € jlglc. Economy and Middle Classes _ Intellectual Property Service

Title issued ................................................ ....... LUXEMBOURG

Patent Application ............................................ ......................------------------------- (1) I. Request

The so-called company: S.A. FLORIDIENI'îE-CHIMIEN.V., Quai des Usines, - 9Λ | 127 ........ 780 0 ÄTH7 ËELGIQUE ^ ....... represented by ë.t. Freÿïinger & '

Es -...... Meyers> ........ Cons ";“ "enpropr _;“ tnd, my ~ tS ~ voB "dcrCtnstt & rs7

Luxembourg * ------------------------------------------------ -----—-----------! -———-- acting- "in ..... quality ....... of ..... iranêat-ai -res ----- (3) .......... ne ~ ne ~ ”cënt eighty six 77 \ deposeQifi ce * .................. .............................................. ~ -:: —Z- (4),; , at _______________________ hours, at the Ministry of the Economy and the Middle Classes, in Luxembourg: 1. this request for obtaining a patent for invention concerning: dd.TD} OF CADMIUM STABILIZED AND PROCESS FOR ITS PREPARATION. (5) 2. the description in language ^ -rano aijs _________________ of the invention in triplicate; 3 ................................... L ............. .................. drawing boards, in triplicate; ^ - p ^ 4. receipt of fees paid to the Luxembourg Registration Office on - ~ Z Î / X ----------------------- ---; 5. the delegation of power, dated -----------_----------------------- on ----- ----------------------; 6. the successor document (authorization); declares (s) by assuming responsibility for this declaration, that the inventor (s) is (are): (6) claim) for the above patent application the priority of one (of) demapde (s) of (7) _____________________________________________________________________________________________________ filed in (8) ______________________________ on (9) ....................... L --------- ------------------------- ------------------------- ---------------------------------------- under N ° (10) ... .................................................. .......................______— -----------------—....... ...— on behalf of (11) ---------------------------------------- ---------------------------------------------------------- -------——----—----------------—- elect) domicile for him (her) and, if desired, for his representative, at Luxembourg -----------___---------- 46 rue au Cimetière, Luxembourg ^ is requesting (nt) the grant of a patent for inventories for the object described in the aforementioned appendices es, f hALlxLldJi agent: s— ----------___-—----- (14) y Π. Deposit Minutes

The above application for a patent for invention has been filed with the Ministry of the Economy and the Middle Classes, Service de la Propriété Intellepiwrilstrisqxemboiirg, dated: ^ er December 1986 / ί * · .. V \ ^ 00 fi sh \ Pr the Minister of Economy and the Middle Classes, at .......-..... „. hours f ~ / pd- \ ï- ·. Vnd .¾ / The head of the intellectual property department.

WJ / V * · .......... / A68U07_ _ EXPLANATIONS RELATING TO FORKÎblAlfeieÂfCÎ (i »5'ϋ will take place" Request for certificate of addition to main patent * to request for main patent No .. .......... from ........... / - (2) enter the names, prenoa, profession.

acrexsu of the applicant, when the latter is an individual or the denomin2ßo2sodale. legal form, address of the head office, when the applicant is a moial- person ((register! "nr" n arfrMcp Hn manftarair / "ztorfié οηηςρίΐ pn nronriérÆ industrial, provided with a special Douvoirs. if applicable:" rpnriitfntArmr. ........ atnssant as Agent “? * '' BL-39 77 Descriptive brief filed in support of a patent application for: CADMIUM OXIDE STABILIZED AND PRODUCED FOR ITS PREPARATION.

S.A. FLORIDIENNE CHEMISTRY N.V.

Quai des Usines 12,

B - 7800 ATH

ή STABILIZED CADMIUM OXIDE AND PROCESS FOR ITS PREPARATION.

The present invention relates to cadmium oxide stabilized with a view in particular to its use as a raw material for the manufacture of cadmium soaps (fatty acid salts) which are used as stabilizers and / or lubricants in the field of synthetic resins "

It is well known that cadmium, a heavy metal, and its compounds are particularly toxic to living organisms. Furthermore, the dissemination of cadmium in the environment has increased alarmingly in recent years. Strict laws relating to the places of manufacture and / or of use as well as to the transport of this heavy metal have been implemented.

Cadmium oxide is generally present in the pulverulent state with a particle size close to one micron. In addition, the cadmium oxide powder is not very flowable and its physical characteristics make it difficult to manipulate the product by placing in a silo, pneumatic conveying or by a mechanical device. Preventive and protective measures involving the use of particularly expensive devices and installations are necessary to meet the requirements imposed by the legislation currently in force.

In addition, cadmium oxide is difficult to store for an extended period, since progressive carbonation takes place, thereby reducing the quality of the raw material used in the manufacture of cadmium stabilizers and lubricants and, possibly, the quality of the stabilizer or lubricant prepared. Cadmium oxide also tends to take up moisture and agglomerate during storage, making handling even less easy. These characteristics require storage protected from air and moisture, preferably in perfectly closed drums whose transport is particularly expensive and cause high difficulties with regard to Γ 2 handling, in particular in using conveyor systems using dry air or nitrogen.

The object of the present invention is to treat the cadmium oxide in such a way that it is presented in a more stable non-pulverulent form, that is to say substantially less sensitive to air humidity and less toxic to the environment, by providing a starting material equivalent to cadmium oxide for the manufacture of stabilizers and / or lubricants intended for synthetic resins.

Another object of the present invention is to provide cadmium oxide treated so as to obtain a product intended for the manufacture of stabilizers and / or lubricants, which is easy to handle, to convey, to store and to transport, therefore not requiring expensive installations.

According to the present invention, the non-pulverulent stabilized cadmium oxide contains cadmium oxide and at least one adjuvant compatible with the use of the stabilizer and / or lubricant and of the synthetic resin for which it is intended. , part of the cadmium oxide and of the adjuvant being able to have reacted at least partially between them.

It can be seen that the stabilized cadmium oxide according to the present invention is in a non-pulverulent form which is easy to handle in conventional storage and conveying installations without it being necessary to take any particular and expensive arrangements for with regard to environmental pollution.

It is also found that the stabilized cadmium oxide according to the present invention is substantially less sensitive to moisture uptake and to carbonation. This property also facilitates its handling and maintains consistency in chemical quality.

It has also been observed that the state in which the stabilized cadmium oxide is present in accordance with the present invention hardly influences the manufacture of

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3 stabilizer and / or lubricant prepared from it, nor the manufacture of the resin containing a stabilizer and / or lubricant obtained from stabilized cadmium oxide according to the present invention.

5 According to the present invention, the adjuvant is chosen from the group consisting of fatty acids and derivatives thereof, in the saturated or unsaturated state, lubricating agents, complexing agents, antioxidant agents, plasticizers, metallic soaps and raincoats.

Advantageously, the stabilized cadmium oxide according to the present invention contains at least 5% of adjuvant, at least part of which has optionally reacted with cadmium oxide. For economic and practical reasons, it is not advantageous to exceed an additive content greater than 50%, although contents of this order are not excluded from the scope of the invention. Preferably, it contains approximately 15% by weight of adjuvant and 85% by weight of cadmium oxide, at least part of the constituents having reacted with each other.

The cadmium oxide stabilized according to the present invention can be in the form of balls, scales, spaghetti, granules, pearls, pastilles, etc.

The present invention also relates to a process for the preparation of stabilized cadmium oxide according to the present invention. The fresh cadmium oxide and at least one adjuvant of the above-mentioned type are intimately mixed, in the ratio between 5/95 and 50/50, and the mixture thus obtained is subjected to a granulation step known per se. These techniques are conventional and we can cite extrusion and granulation by friction or other, encapsulation, compaction, rolling and spraying, some of these techniques, involving at least local heating of the mixture and consequently 35 that soften or melt the constituents.

The example which follows is given for the purpose of illustrating the present invention without limiting it.

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Example 100 kg of cadmium oxide and 15 kg of stearic acid are intimately mixed in a conventional mixer, used in the PVC industry. As soon as the mixture is homogenized, the heating and speed conditions are adjusted so as to reach a temperature of around 110 degrees. It is then possible to extract from the mixer a softened mass which, after passing over a rolling and cooling strip, will be transformed by a pin device into scales of a few mm 2 of surface.

The product, unlike the traditional pulverulent product, does not generate dust and makes it possible to appreciably reduce the precautionary measures to avoid intoxication.

It has both physical and chemical stability. This leads to various advantages, whether in terms of consistency of chemical quality that can be guaranteed to the user or in terms of storage which can then be envisaged in the longer term.

The product according to the invention, by its presentation, has good flow properties. It allows "continuous" dosing from supply silos. Any manipulation of the product by pneumatic conveying techniques or other mechanical feeding system is then also permitted.

It also allows during its implementation, a perfect "dispersibility". This is in accordance with the tests usually used by soap manufacturers to, for example, assess the reactivity of cadmium oxide.

The product according to the invention, finally has a very high weight / volume ratio and advantageous in many respects: for example, savings made during trans-35 port, when designing storage facilities. This product is approximately 3 times denser than conventional cadmium oxide.

Claims (5)

1. Non-pulverulent, stabilized cadmium oxide intended for the preparation of stabilizers and / or lubricants of synthetic resins, characterized in that it contains cadmium oxide and at least one adjuvant compatible with the use of the stabilizer and / or lubricant and the synthetic resin for which it is intended, part of the cadmium oxide and of the adjuvant having optionally reacted at least partially with one another. 2. Stabilized, non-pulverulent cadmium oxide according to claim 1 characterized in that the adjuvant is chosen from the group consisting of fatty acids and derivatives thereof, in the saturated or unsaturated state, the - agents lubricants, complexing agents, antioxidants, plasticizers, metallic soaps and waxes. 3. Non-pulverulent, stabilized cadmium oxide according to claim 1 or 2, characterized in that it contains at least 5% of adjuvant, at least part of which has optionally reacted with cadmium oxide. 4. A stabilized, non-pulverulent cadmium oxide according to any one of the preceding claims, characterized in that it contains at most 50% of adjuvant, at least part of which has optionally reacted with cadmium oxide. 5. Stabilized, non-pulverulent cadmium oxide according to any one of the preceding claims, characterized in that it contains 15% by weight of adjuvant and 85% by weight of cadmium oxide, at least part of the constituents possibly having reacted to each other. 6. Process for the preparation of stabilized, non-pulverulent cadmium oxide according to any one of the preceding claims, characterized in that the fresh cadmium oxide and at least one adjuvant of the above-mentioned type are thoroughly mixed in the ratio 35 between 5/95 and 50/50, and the mixture thus obtained is subjected to a granulation step known per se. 7. Method according to claim 6 characterized in that the granulation is combined with heating at least 6 i V, I V local of the mixture. 8. Use of stabilized, non-pulverulent cadmium oxide for the manufacture of stabilizers and / or lubricants intended for synthetic resins, 5 10 15 2 0 2 5 30 35