CN1281074A - Diwei self-catalyzing alcohol process for pulping - Google Patents

Abstract

A self-catalytic alcohol method for making paper pulp with sugarcaneflower filvergrass other than wood is disclosed. Its advantages include no environmental pollution, low cost and high quality of pulp.

Description

Diwei self-catalyzing alcohol process for pulping

The present invention relates to a kind of papermaking technology, especially belong to a kind of pollution-free Diwei self-catalyzing alcohol process for pulping.

At present, domestic is raw pulp with grass fibers such as reeds, adopts conventional method ubiquity cooking liquor to be difficult to administer, and pollution problem is serious.The self-catalysis ethanol pulping is a kind of pulping method without pollution, and domestic still do not have a correlative study, and abroad this research is raw material with timber all, as USP4, and 100,016 and USP4,764,595 two patents all are to be raw pulp with the broadleaf.

The object of the present invention is to provide a kind of is the little Diwei self-catalyzing alcohol process for pulping of pollution of raw material with careless class, to substitute traditional reed pulping process.

To achieve the above object of the invention, the present invention realizes like this, detailed process is as follows: (a) boiling: the section that clean reed is cut into 20-30 (mm), pack in the boiling vessel, by liquor ratio 1: 6-1: 12 (kg/l), add the ethanol water of 45%-60% (v/v), be rapidly heated after 170 ℃-200 ℃, under this temperature, be incubated 60-150 (min); (b) washing: with the slurry concentration of boiling is after the ethanolic solution of 45%-60% (v/v) is adjusted to concentration and is 8%-12%, move in the displacement washing device, under 40 ℃-70 ℃ condition, with concentration is that the ethanol water of 45%-60% (v/v) carries out displacement washing, and the per kilogram oven dry stock consumes washing lotion 7-12 (kg/kg oven dry stock); (c) stripping: superheated vapour is fed the displacement washing device, with the residual ethanol in the stripping pulp.

The scale to slurry factory of the invention has the advantages that requires not tight, and the performance of slurry is good, pollutes little, ethanol in the cooking waste liquor easily reclaims, byproducts such as also recyclable simultaneously lignin, furfural, acetate and hemicellulose, and its reclaimer is simple, cost is low, to the straw pulp mill particularly suitable.

The present invention is further detailed explanation below in conjunction with embodiment:

Diwei self-catalyzing alcohol process for pulping of the present invention is as follows:

(a) boiling

Reed reed is cut into the section of 20-30 (mm), sifts out sand dust and foreign material such as grass bits grade, put into the withstand voltage Stainless Steel jar of 600ml, add the ethanol water of 50% (v/v) by liquor ratio 1: 8, add be heated to 190 ℃ in the oil bath after, under this temperature, be incubated, temperature retention time 140min, boiling finishes;

(b) washing

With the slurry after the above-mentioned boiling, move in the displacement washing device, being adjusted to concentration with the ethanolic solution of 50% (v/v) is 12%, washs the about 10kg of every gram oven dry stock consumption washing lotion with the ethanol waters of 50% (v/v) down at 50 ℃.

(c) stripping

Superheated vapour is fed the displacement washing device, go out to remain in ethanol in the slurry with stripping.

Former material of the present invention is non-timber, more than be that raw material is one of them with reed reed.

Claims (1)

1. A kind of Diwei self-catalyzing alcohol process for pulping mainly comprises steaming person, washing and stripping plurality of processes, it is characterized in that:

   (a) boiling

   Clean reed is cut into the section of 20-30 (mm), in the boiling vessel of packing into, by liquor ratio 1: 6-1: 12 (kg/l), adds the ethanol water of 45%-60% (v/v), be rapidly heated after 170 ℃-200 ℃, under this temperature, be incubated 60-150 (min);

   (b) washing

   With the slurry concentration of boiling is after the ethanolic solution of 45%-60% (v/v) is adjusted to concentration and is 8%-12%, move in the displacement washing device, under 40 ℃-70 ℃ condition, ethanol water with concentration 45%-60% (v/v) carries out displacement washing, and the per kilogram oven dry stock consumes washing lotion 7-12 (kg/kg oven dry stock);

   (c) stripping

   Superheated vapour is fed the displacement washing device, with the residual ethanol in the stripping pulp.