Method for producing high-quality white granulated sugar by clarifying syrup

A high-quality technology for white granulated sugar, which is applied in the production of sucrose, sugar production, and juice purification, etc. It can solve the problems of declining market competitiveness, high residual sulfur content, and the product is easy to return to moisture and turn yellow, and achieve a slightly yellow color. , the effect of high purity and low color value

Inactive Publication Date: 2011-04-20
杨鲁昆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high residual sulfur content in the sulfite process, the products are prone to dampness and yellowing, and are rejected by large and me

Method used

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  • Method for producing high-quality white granulated sugar by clarifying syrup
  • Method for producing high-quality white granulated sugar by clarifying syrup
  • Method for producing high-quality white granulated sugar by clarifying syrup

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The modified polysilicate microgel flocculant is prepared by the following method:

[0019] Under high-speed stirring conditions, 400 g of water glass with a modulus of 3.2 and a silica concentration of 5% was acidified with dilute sulfuric acid at a concentration of 10% by weight to a pH of 9 to prepare a polysilicate microgel. Dissolve chitosan with a deacetylation degree of 85% with 1% concentration of acetic acid to prepare a chitosan-acetic acid solution with a concentration of 1% by weight, and add polysilicic acid to the solution according to the mass ratio of chitosan to 0.2% of silicon dioxide In the microgel, after fully stirring for 2 minutes, dilute the solution with water to a silicon dioxide concentration of 0.5%, then fully stir for 10 minutes, vacuum dry or dry naturally, and the obtained solid powder is the prepared chitosan-modified polysilicic acid microgel flocculant.

[0020] Modified organic bentonite is prepared by the following method:

[0021]...

Embodiment 2

[0027] The modified polysilicate microgel flocculant is prepared by the following method:

[0028] Under high-speed stirring conditions, 400 g of water glass with a modulus of 3.2 and a silica concentration of 15% was acidified with dilute sulfuric acid at a concentration of 30% by weight to a pH of 10 to prepare a polysilicate microgel. Dissolving chitosan with a deacetylation degree of 95% with 3% concentration of acetic acid is prepared into a chitosan-acetic acid solution with a concentration of 3% by weight, and the solution is added to polysilicic acid according to the mass ratio of chitosan to 1% of silicon dioxide. In the microgel, after fully stirring for 10 minutes, dilute the solution with water to a silicon dioxide concentration of 2%, then fully stir for 30 minutes, vacuum-dry or air-dry, and the obtained solid powder is the prepared chitosan-modified polysilicic acid microgel flocculant.

[0029] Modified organic bentonite is prepared by the following method:

...

Embodiment 3

[0036] In the production process of the raw sugar refinery, take the 60°Bx syrup prepared with raw sugar, heat it to 85°C, add 1% organic bentonite adsorbent, stir for 5 minutes, filter with a filter cloth, and boil the sugar, crystallize and separate the nectar , to obtain sulfur-free white granulated sugar, which meets the national GB317-2006 refined sugar standard after testing. The relevant indicators of the filtered syrup were measured, and the results are shown in Table 3.

[0037] Table.3 Decolorization and purification index of organic bentonite adsorbent to syrup in raw sugar refinery

[0038]

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PUM

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Abstract

The invention relates to a method for producing high-quality white granulated sugar by clarifying syrup. The method comprises the following steps of: heating the syrup; adding lime milk; adjusting the pH value to be between 8.0 and 8.5; adding anionic inorganic gel serving as a flocculating agent in an amount which accounts for 0.01 to 0.05 percent of the amount of the syrup; keeping the pH value at 8.0 to 8.5 for about 2 minutes; adding phosphoric acid to reduce the pH value to be between 7.0 and 7.5; pouring the syrup into a sedimentation tank or a floatation tank to separate clarified juice and mud juice out; filtering the mud juice by using filtering cloth or a vacuum filter, and mixing the filtered clarified juice and the separated clarified juice; and evaporating, concentrating, boiling sugar, crystallizing and extracting the sugar to obtain the white granulated sugar of above first class; or evaporating and concentrating to obtain the syrup, adding organic bentonite in an amount which accounts for 0.2 to 1 percent of the amount of the syrup, stirring, adsorbing for 5 to 20 minutes, filtering by using the filtering cloth, boiling, crystallizing and extracting the sugar to directly produce sulfur-free refined sugar. The method has the advantages of good clarification effect, high clear juice purity, short process flow, high process operation safety and low labor intensity.

Description

technical field [0001] The invention relates to a sugar making process, in particular to a method for producing high-quality white granulated sugar by using sugar juice syrup obtained by pressing sugar cane or dissolving imported raw sugar as a raw material for sugar refining and clarification. Background technique [0002] Sugar is one of the necessities of people's life, and it is also an important strategic reserve material of the country. At present, the world's sugarcane sugar industry generally adopts three processes: sulfurous acid method, carbonic acid method and "two-step method" (that is, raw sugar is produced first and then refined to produce white granulated sugar), among which the first two production processes are mostly used in my country. , Australia, Cuba, Brazil and other countries mainly use the "two-step" process. The white granulated sugar produced by the carbonic acid method has better quality and lower residual sulfur content, generally 10mg·kg -1 How...

Claims

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Application Information

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IPC IPC(8): C13B20/00C13B20/02C13B20/12C13B25/00C13B30/00A23L1/09A23L29/30
Inventor 杨鲁昆普愿
Owner 杨鲁昆
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