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Method for producing alkyd resins by recycling esterification waste water of alkyd resins and application of alkyd resins

A technology of alkyd resin and esterification wastewater, which is applied in the direction of polyester coating, heating water/sewage treatment, coating, etc., can solve the problems of increased sewage treatment operating costs, no recycling, difficult sewage treatment, etc., and achieve manufacturing equipment Simple, resource-saving, and excellent use characteristics

Active Publication Date: 2010-10-20
SHANGHAI CARPOLY PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

COD > 200,000 and BOD > 50,000 in these esterification wastewaters make sewage treatment difficult and increase the operating cost of sewage treatment
In addition, because these esterification wastewater contains a large amount of recyclable and valuable substances, but they are not recycled, it causes a serious waste of resources and pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The method for producing alkyd resin by recycling alkyd resin esterification wastewater is made from the following raw materials in parts by weight:

[0041] Soybean acid 165-175,

[0042] Benzoic acid 27-29,

[0043] Maleic anhydride 3.5-4.5,

[0044] Phthalic anhydride 260-270,

[0045] Pentaerythritol 115-125,

[0046] Recycled extract of alkyd resin esterification wastewater 170-190,

[0047] Reflux xylene 24-28,

[0048] Diluted xylene 260-270,

[0049] Color reducing antioxidant 1.5-2.5;

[0050] The recovered extract of the alkyd resin esterification wastewater is prepared in the following way: the collected alkyd resin esterification wastewater is put into a still, heated to raise the temperature, and the temperature of the heat transfer oil in the still is controlled at 130-150°C. Then turn on the cooling water of the vertical cooling jacket in the distillation still, so that the temperature in the reaction kettle is controlled at 125-135°C, distill and ...

Embodiment 2

[0060] The method for producing alkyd resin by recycling alkyd resin esterification wastewater is made from the following raw materials in parts by weight:

[0061] soybean oil 160,

[0062] Benzoic acid 25,

[0063] Maleic anhydride 3,

[0064] Phthalic anhydride 250,

[0065] Pentaerythritol 110,

[0066] Recycled extract of alkyd resin esterification wastewater 160,

[0067] Reflux xylene 20,

[0068] Dilute xylene 250,

[0069] Color reducing antioxidant 1;

[0070] The recovered extract of the alkyd resin esterification wastewater is prepared in the following way: the collected alkyd resin esterification wastewater is put into a still, heated to raise the temperature, and the temperature of the heat transfer oil in the still is controlled at 130-150°C. At the same time, open the cooling water of the vertical cooling jacket in the distillation still, so that the temperature is controlled at 125-135 ° C, and the distillation and dehydration (barrelling, delivery to t...

Embodiment 3

[0080] The method for producing alkyd resin by recycling alkyd resin esterification wastewater is made from the following raw materials in parts by weight:

[0081] Soybean acid 180,

[0082] Benzoic acid 30,

[0083] Maleic anhydride 5,

[0084] Phthalic anhydride 280,

[0085] Pentaerythritol 130,

[0086] Recycled extract of alkyd resin esterification wastewater 200,

[0087] Reflux xylene 30,

[0088] Diluted xylene 280,

[0089] Color reducing antioxidant 3;

[0090] The manufacturing steps include the following:

[0091] (1), accurately drop into the reclaimed extract of acid resin esterification waste water, 30% phthalic anhydride, color-reducing antioxidant in reactor by above-mentioned formula quantity, open stirring, logical nitrogen (N 2 ↑) 8 minutes, nitrogen flow control: 2-5m3 / h;

[0092] (2) Heat with heat conduction oil, heat up to 165°C for 2 hours, then dehydrate, and control the temperature at the top of the vertical cooling of the reactor to ≤115°C...

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Abstract

The invention discloses a method for producing alkyd resins by recycling esterification waste water of the alkyd resins and application of the alkyd resins. The alkyd resins are produced by the following raw materials in parts by weight: 160-180 parts of soya oil acid, 25-30 parts of benzoic acid, 3-5 parts of maleic anhydride, 250-280 parts of phthalic anhydride, 110-130 parts of pentaerythritol, 160-200 parts of recycled extracts of the esterification waste water of the alkyd resins, 20-30 parts of reflux dimethylbenzene, 250-280 parts of diluted dimethylbenzene and 1-3 parts of subtractive colour antioxidants. On the one hand, the useful substances in the esterification waste water are effectively recycled to produce the alkyd resins, thus lowering the resin formula cost, and on the other hand, after the raw esterification waste water is treated by the preparation method of the invention, COD of the distilled waste water is reduced from the number more than 200000 of the raw waste water to the number less than 3000 and BOD is reduced from the number more than 50000 of the raw waste water to the number less than 1000, thus improving the treatment capacity of biochemical sewage and lowering the treatment expenses.

Description

technical field [0001] The present invention relates to the field of alkyd resin and its synthesis method, in particular to a method for producing alkyd resin by recycling alkyd resin esterification wastewater using alkyd resin esterification wastewater as a part of raw materials and its application . Background technique [0002] At present, the esterification wastewater discharged by alkyd resin production enterprises is basically not pretreated, nor recycled, but directly enters the biochemical sewage tank for treatment and discharge after passing the standard. COD>200,000 and BOD>50,000 of these esterification wastewater make sewage treatment difficult and increase operating costs of sewage treatment. In addition, because these esterification wastewater contains a large amount of recyclable and usable substances, but they are not recycled, it causes a serious waste of resources and pollutes the environment. Contents of the invention [0003] One object of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/49C09D167/08C02F1/04
Inventor 朱建锋
Owner SHANGHAI CARPOLY PAINT
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